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.
22 #include <sys/socket.h>
24 #include <netinet/in.h>
28 #include "byte-order.h"
30 #include "classifier.h"
34 #include "dynamic-string.h"
35 #include "fail-open.h"
39 #include "mac-learning.h"
40 #include "multipath.h"
46 #include "ofp-print.h"
48 #include "ofproto-sflow.h"
50 #include "openflow/nicira-ext.h"
51 #include "openflow/openflow.h"
52 #include "openvswitch/datapath-protocol.h"
56 #include "poll-loop.h"
60 #include "stream-ssl.h"
64 #include "unaligned.h"
69 VLOG_DEFINE_THIS_MODULE(ofproto);
71 COVERAGE_DEFINE(facet_changed_rule);
72 COVERAGE_DEFINE(facet_revalidate);
73 COVERAGE_DEFINE(odp_overflow);
74 COVERAGE_DEFINE(ofproto_agg_request);
75 COVERAGE_DEFINE(ofproto_costly_flags);
76 COVERAGE_DEFINE(ofproto_ctlr_action);
77 COVERAGE_DEFINE(ofproto_del_rule);
78 COVERAGE_DEFINE(ofproto_error);
79 COVERAGE_DEFINE(ofproto_expiration);
80 COVERAGE_DEFINE(ofproto_expired);
81 COVERAGE_DEFINE(ofproto_flows_req);
82 COVERAGE_DEFINE(ofproto_flush);
83 COVERAGE_DEFINE(ofproto_invalidated);
84 COVERAGE_DEFINE(ofproto_no_packet_in);
85 COVERAGE_DEFINE(ofproto_ofp2odp);
86 COVERAGE_DEFINE(ofproto_packet_in);
87 COVERAGE_DEFINE(ofproto_packet_out);
88 COVERAGE_DEFINE(ofproto_queue_req);
89 COVERAGE_DEFINE(ofproto_recv_openflow);
90 COVERAGE_DEFINE(ofproto_reinit_ports);
91 COVERAGE_DEFINE(ofproto_unexpected_rule);
92 COVERAGE_DEFINE(ofproto_uninstallable);
93 COVERAGE_DEFINE(ofproto_update_port);
95 /* Maximum depth of flow table recursion (due to NXAST_RESUBMIT actions) in a
96 * flow translation. */
97 #define MAX_RESUBMIT_RECURSION 16
102 struct hmap_node hmap_node; /* In struct ofproto's "ports" hmap. */
103 struct netdev *netdev;
104 struct ofp_phy_port opp; /* In host byte order. */
106 struct cfm *cfm; /* Connectivity Fault Management, if any. */
109 static void ofport_free(struct ofport *);
110 static void ofport_run(struct ofproto *, struct ofport *);
111 static void ofport_wait(struct ofport *);
113 struct action_xlate_ctx {
114 /* action_xlate_ctx_init() initializes these members. */
117 struct ofproto *ofproto;
119 /* Flow to which the OpenFlow actions apply. xlate_actions() will modify
120 * this flow when actions change header fields. */
123 /* The packet corresponding to 'flow', or a null pointer if we are
124 * revalidating without a packet to refer to. */
125 const struct ofpbuf *packet;
127 /* If nonnull, called just before executing a resubmit action.
129 * This is normally null so the client has to set it manually after
130 * calling action_xlate_ctx_init(). */
131 void (*resubmit_hook)(struct action_xlate_ctx *, struct rule *);
133 /* If true, the speciality of 'flow' should be checked before executing
134 * its actions. If special_cb returns false on 'flow' rendered
135 * uninstallable and no actions will be executed. */
138 /* xlate_actions() initializes and uses these members. The client might want
139 * to look at them after it returns. */
141 struct ofpbuf *odp_actions; /* Datapath actions. */
142 tag_type tags; /* Tags associated with OFPP_NORMAL actions. */
143 bool may_set_up_flow; /* True ordinarily; false if the actions must
144 * be reassessed for every packet. */
145 uint16_t nf_output_iface; /* Output interface index for NetFlow. */
147 /* xlate_actions() initializes and uses these members, but the client has no
148 * reason to look at them. */
150 int recurse; /* Recursion level, via xlate_table_action. */
151 int last_pop_priority; /* Offset in 'odp_actions' just past most
152 * recent ODP_ACTION_ATTR_SET_PRIORITY. */
155 static void action_xlate_ctx_init(struct action_xlate_ctx *,
156 struct ofproto *, const struct flow *,
157 const struct ofpbuf *);
158 static struct ofpbuf *xlate_actions(struct action_xlate_ctx *,
159 const union ofp_action *in, size_t n_in);
161 /* An OpenFlow flow. */
163 long long int used; /* Time last used; time created if not used. */
164 long long int created; /* Creation time. */
168 * - Do include packets and bytes from facets that have been deleted or
169 * whose own statistics have been folded into the rule.
171 * - Do include packets and bytes sent "by hand" that were accounted to
172 * the rule without any facet being involved (this is a rare corner
173 * case in rule_execute()).
175 * - Do not include packet or bytes that can be obtained from any facet's
176 * packet_count or byte_count member or that can be obtained from the
177 * datapath by, e.g., dpif_flow_get() for any facet.
179 uint64_t packet_count; /* Number of packets received. */
180 uint64_t byte_count; /* Number of bytes received. */
182 ovs_be64 flow_cookie; /* Controller-issued identifier. */
184 struct cls_rule cr; /* In owning ofproto's classifier. */
185 uint16_t idle_timeout; /* In seconds from time of last use. */
186 uint16_t hard_timeout; /* In seconds from time of creation. */
187 bool send_flow_removed; /* Send a flow removed message? */
188 int n_actions; /* Number of elements in actions[]. */
189 union ofp_action *actions; /* OpenFlow actions. */
190 struct list facets; /* List of "struct facet"s. */
193 static struct rule *rule_from_cls_rule(const struct cls_rule *);
194 static bool rule_is_hidden(const struct rule *);
196 static struct rule *rule_create(const struct cls_rule *,
197 const union ofp_action *, size_t n_actions,
198 uint16_t idle_timeout, uint16_t hard_timeout,
199 ovs_be64 flow_cookie, bool send_flow_removed);
200 static void rule_destroy(struct ofproto *, struct rule *);
201 static void rule_free(struct rule *);
203 static struct rule *rule_lookup(struct ofproto *, const struct flow *);
204 static void rule_insert(struct ofproto *, struct rule *);
205 static void rule_remove(struct ofproto *, struct rule *);
207 static void rule_send_removed(struct ofproto *, struct rule *, uint8_t reason);
208 static void rule_get_stats(const struct rule *, uint64_t *packets,
211 /* An exact-match instantiation of an OpenFlow flow. */
213 long long int used; /* Time last used; time created if not used. */
217 * - Do include packets and bytes sent "by hand", e.g. with
220 * - Do include packets and bytes that were obtained from the datapath
221 * when a flow was deleted (e.g. dpif_flow_del()) or when its
222 * statistics were reset (e.g. dpif_flow_put() with
223 * DPIF_FP_ZERO_STATS).
225 * - Do not include any packets or bytes that can currently be obtained
226 * from the datapath by, e.g., dpif_flow_get().
228 uint64_t packet_count; /* Number of packets received. */
229 uint64_t byte_count; /* Number of bytes received. */
231 uint64_t dp_packet_count; /* Last known packet count in the datapath. */
232 uint64_t dp_byte_count; /* Last known byte count in the datapath. */
234 uint64_t rs_packet_count; /* Packets pushed to resubmit children. */
235 uint64_t rs_byte_count; /* Bytes pushed to resubmit children. */
236 long long int rs_used; /* Used time pushed to resubmit children. */
238 /* Number of bytes passed to account_cb. This may include bytes that can
239 * currently obtained from the datapath (thus, it can be greater than
241 uint64_t accounted_bytes;
243 struct hmap_node hmap_node; /* In owning ofproto's 'facets' hmap. */
244 struct list list_node; /* In owning rule's 'facets' list. */
245 struct rule *rule; /* Owning rule. */
246 struct flow flow; /* Exact-match flow. */
247 bool installed; /* Installed in datapath? */
248 bool may_install; /* True ordinarily; false if actions must
249 * be reassessed for every packet. */
250 size_t actions_len; /* Number of bytes in actions[]. */
251 struct nlattr *actions; /* Datapath actions. */
252 tag_type tags; /* Tags (set only by hooks). */
253 struct netflow_flow nf_flow; /* Per-flow NetFlow tracking data. */
256 static struct facet *facet_create(struct ofproto *, struct rule *,
258 const struct ofpbuf *packet);
259 static void facet_remove(struct ofproto *, struct facet *);
260 static void facet_free(struct facet *);
262 static struct facet *facet_lookup_valid(struct ofproto *, const struct flow *);
263 static bool facet_revalidate(struct ofproto *, struct facet *);
265 static void facet_install(struct ofproto *, struct facet *, bool zero_stats);
266 static void facet_uninstall(struct ofproto *, struct facet *);
267 static void facet_flush_stats(struct ofproto *, struct facet *);
269 static void facet_make_actions(struct ofproto *, struct facet *,
270 const struct ofpbuf *packet);
271 static void facet_update_stats(struct ofproto *, struct facet *,
272 const struct dpif_flow_stats *);
273 static void facet_push_stats(struct ofproto *, struct facet *);
275 static void send_packet_in(struct ofproto *, struct dpif_upcall *,
276 const struct flow *, bool clone);
280 uint64_t datapath_id; /* Datapath ID. */
281 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
282 char *mfr_desc; /* Manufacturer. */
283 char *hw_desc; /* Hardware. */
284 char *sw_desc; /* Software version. */
285 char *serial_desc; /* Serial number. */
286 char *dp_desc; /* Datapath description. */
290 struct netdev_monitor *netdev_monitor;
291 struct hmap ports; /* Contains "struct ofport"s. */
292 struct shash port_by_name;
296 struct netflow *netflow;
297 struct ofproto_sflow *sflow;
300 struct classifier cls;
301 struct timer next_expiration;
305 bool need_revalidate;
306 struct tag_set revalidate_set;
308 /* OpenFlow connections. */
309 struct connmgr *connmgr;
311 /* Hooks for ovs-vswitchd. */
312 const struct ofhooks *ofhooks;
315 /* Used by default ofhooks. */
316 struct mac_learning *ml;
319 /* Map from dpif name to struct ofproto, for use by unixctl commands. */
320 static struct shash all_ofprotos = SHASH_INITIALIZER(&all_ofprotos);
322 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
324 static const struct ofhooks default_ofhooks;
326 static uint64_t pick_datapath_id(const struct ofproto *);
327 static uint64_t pick_fallback_dpid(void);
329 static void ofproto_flush_flows__(struct ofproto *);
330 static int ofproto_expire(struct ofproto *);
331 static void flow_push_stats(struct ofproto *, const struct rule *,
332 struct flow *, uint64_t packets, uint64_t bytes,
335 static void handle_upcall(struct ofproto *, struct dpif_upcall *);
337 static void handle_openflow(struct ofconn *, struct ofpbuf *);
339 static struct ofport *get_port(const struct ofproto *, uint16_t odp_port);
340 static void update_port(struct ofproto *, const char *devname);
341 static int init_ports(struct ofproto *);
342 static void reinit_ports(struct ofproto *);
344 static void ofproto_unixctl_init(void);
347 ofproto_create(const char *datapath, const char *datapath_type,
348 const struct ofhooks *ofhooks, void *aux,
349 struct ofproto **ofprotop)
351 char local_name[IF_NAMESIZE];
358 ofproto_unixctl_init();
360 /* Connect to datapath and start listening for messages. */
361 error = dpif_open(datapath, datapath_type, &dpif);
363 VLOG_ERR("failed to open datapath %s: %s", datapath, strerror(error));
366 error = dpif_recv_set_mask(dpif,
367 ((1u << DPIF_UC_MISS) |
368 (1u << DPIF_UC_ACTION) |
369 (1u << DPIF_UC_SAMPLE)));
371 VLOG_ERR("failed to listen on datapath %s: %s",
372 datapath, strerror(error));
376 dpif_flow_flush(dpif);
377 dpif_recv_purge(dpif);
379 error = dpif_port_get_name(dpif, ODPP_LOCAL,
380 local_name, sizeof local_name);
382 VLOG_ERR("%s: cannot get name of datapath local port (%s)",
383 datapath, strerror(error));
387 /* Initialize settings. */
388 p = xzalloc(sizeof *p);
389 p->fallback_dpid = pick_fallback_dpid();
390 p->datapath_id = p->fallback_dpid;
391 p->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
392 p->hw_desc = xstrdup(DEFAULT_HW_DESC);
393 p->sw_desc = xstrdup(DEFAULT_SW_DESC);
394 p->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
395 p->dp_desc = xstrdup(DEFAULT_DP_DESC);
397 /* Initialize datapath. */
399 p->netdev_monitor = netdev_monitor_create();
400 hmap_init(&p->ports);
401 shash_init(&p->port_by_name);
402 p->max_ports = dpif_get_max_ports(dpif);
404 /* Initialize submodules. */
408 /* Initialize flow table. */
409 classifier_init(&p->cls);
410 timer_set_duration(&p->next_expiration, 1000);
412 /* Initialize facet table. */
413 hmap_init(&p->facets);
414 p->need_revalidate = false;
415 tag_set_init(&p->revalidate_set);
417 /* Initialize hooks. */
419 p->ofhooks = ofhooks;
423 p->ofhooks = &default_ofhooks;
425 p->ml = mac_learning_create();
428 /* Pick final datapath ID. */
429 p->datapath_id = pick_datapath_id(p);
430 VLOG_INFO("using datapath ID %016"PRIx64, p->datapath_id);
432 shash_add_once(&all_ofprotos, dpif_name(p->dpif), p);
434 /* Initialize OpenFlow connections. */
435 p->connmgr = connmgr_create(p, datapath, local_name);
442 ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id)
444 uint64_t old_dpid = p->datapath_id;
445 p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p);
446 if (p->datapath_id != old_dpid) {
447 VLOG_INFO("datapath ID changed to %016"PRIx64, p->datapath_id);
449 /* Force all active connections to reconnect, since there is no way to
450 * notify a controller that the datapath ID has changed. */
451 ofproto_reconnect_controllers(p);
456 ofproto_set_controllers(struct ofproto *p,
457 const struct ofproto_controller *controllers,
458 size_t n_controllers)
460 connmgr_set_controllers(p->connmgr, controllers, n_controllers);
464 ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode)
466 connmgr_set_fail_mode(p->connmgr, fail_mode);
469 /* Drops the connections between 'ofproto' and all of its controllers, forcing
470 * them to reconnect. */
472 ofproto_reconnect_controllers(struct ofproto *ofproto)
474 connmgr_reconnect(ofproto->connmgr);
477 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s
478 * in-band control should guarantee access, in the same way that in-band
479 * control guarantees access to OpenFlow controllers. */
481 ofproto_set_extra_in_band_remotes(struct ofproto *ofproto,
482 const struct sockaddr_in *extras, size_t n)
484 connmgr_set_extra_in_band_remotes(ofproto->connmgr, extras, n);
487 /* Sets the OpenFlow queue used by flows set up by in-band control on
488 * 'ofproto' to 'queue_id'. If 'queue_id' is negative, then in-band control
489 * flows will use the default queue. */
491 ofproto_set_in_band_queue(struct ofproto *ofproto, int queue_id)
493 connmgr_set_in_band_queue(ofproto->connmgr, queue_id);
497 ofproto_set_desc(struct ofproto *p,
498 const char *mfr_desc, const char *hw_desc,
499 const char *sw_desc, const char *serial_desc,
502 struct ofp_desc_stats *ods;
505 if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
506 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
507 sizeof ods->mfr_desc);
510 p->mfr_desc = xstrdup(mfr_desc);
513 if (strlen(hw_desc) >= sizeof ods->hw_desc) {
514 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
515 sizeof ods->hw_desc);
518 p->hw_desc = xstrdup(hw_desc);
521 if (strlen(sw_desc) >= sizeof ods->sw_desc) {
522 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
523 sizeof ods->sw_desc);
526 p->sw_desc = xstrdup(sw_desc);
529 if (strlen(serial_desc) >= sizeof ods->serial_num) {
530 VLOG_WARN("truncating serial_desc, must be less than %zu "
532 sizeof ods->serial_num);
534 free(p->serial_desc);
535 p->serial_desc = xstrdup(serial_desc);
538 if (strlen(dp_desc) >= sizeof ods->dp_desc) {
539 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
540 sizeof ods->dp_desc);
543 p->dp_desc = xstrdup(dp_desc);
548 ofproto_set_snoops(struct ofproto *ofproto, const struct sset *snoops)
550 return connmgr_set_snoops(ofproto->connmgr, snoops);
554 ofproto_set_netflow(struct ofproto *ofproto,
555 const struct netflow_options *nf_options)
557 if (nf_options && !sset_is_empty(&nf_options->collectors)) {
558 if (!ofproto->netflow) {
559 ofproto->netflow = netflow_create();
561 return netflow_set_options(ofproto->netflow, nf_options);
563 netflow_destroy(ofproto->netflow);
564 ofproto->netflow = NULL;
570 ofproto_set_sflow(struct ofproto *ofproto,
571 const struct ofproto_sflow_options *oso)
573 struct ofproto_sflow *os = ofproto->sflow;
576 struct ofport *ofport;
578 os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
579 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
580 ofproto_sflow_add_port(os, ofport->odp_port,
581 netdev_get_name(ofport->netdev));
584 ofproto_sflow_set_options(os, oso);
586 ofproto_sflow_destroy(os);
587 ofproto->sflow = NULL;
591 /* Connectivity Fault Management configuration. */
593 /* Clears the CFM configuration from 'port_no' on 'ofproto'. */
595 ofproto_iface_clear_cfm(struct ofproto *ofproto, uint32_t port_no)
597 struct ofport *ofport = get_port(ofproto, port_no);
598 if (ofport && ofport->cfm){
599 cfm_destroy(ofport->cfm);
604 /* Configures connectivity fault management on 'port_no' in 'ofproto'. Takes
605 * basic configuration from the configuration members in 'cfm', and the set of
606 * remote maintenance points from the 'n_remote_mps' elements in 'remote_mps'.
607 * Ignores the statistics members of 'cfm'.
609 * This function has no effect if 'ofproto' does not have a port 'port_no'. */
611 ofproto_iface_set_cfm(struct ofproto *ofproto, uint32_t port_no,
612 const struct cfm *cfm,
613 const uint16_t *remote_mps, size_t n_remote_mps)
615 struct ofport *ofport;
617 ofport = get_port(ofproto, port_no);
619 VLOG_WARN("%s: cannot configure CFM on nonexistent port %"PRIu32,
620 dpif_name(ofproto->dpif), port_no);
625 ofport->cfm = cfm_create();
628 ofport->cfm->mpid = cfm->mpid;
629 ofport->cfm->interval = cfm->interval;
630 memcpy(ofport->cfm->maid, cfm->maid, CCM_MAID_LEN);
632 cfm_update_remote_mps(ofport->cfm, remote_mps, n_remote_mps);
634 if (!cfm_configure(ofport->cfm)) {
635 VLOG_WARN("%s: CFM configuration on port %"PRIu32" (%s) failed",
636 dpif_name(ofproto->dpif), port_no,
637 netdev_get_name(ofport->netdev));
638 cfm_destroy(ofport->cfm);
643 /* Returns the connectivity fault management object associated with 'port_no'
644 * within 'ofproto', or a null pointer if 'ofproto' does not have a port
645 * 'port_no' or if that port does not have CFM configured. The caller must not
646 * modify or destroy the returned object. */
648 ofproto_iface_get_cfm(struct ofproto *ofproto, uint32_t port_no)
650 struct ofport *ofport = get_port(ofproto, port_no);
651 return ofport ? ofport->cfm : NULL;
655 ofproto_get_datapath_id(const struct ofproto *ofproto)
657 return ofproto->datapath_id;
661 ofproto_has_primary_controller(const struct ofproto *ofproto)
663 return connmgr_has_controllers(ofproto->connmgr);
666 enum ofproto_fail_mode
667 ofproto_get_fail_mode(const struct ofproto *p)
669 return connmgr_get_fail_mode(p->connmgr);
673 ofproto_has_snoops(const struct ofproto *ofproto)
675 return connmgr_has_snoops(ofproto->connmgr);
679 ofproto_get_snoops(const struct ofproto *ofproto, struct sset *snoops)
681 connmgr_get_snoops(ofproto->connmgr, snoops);
685 ofproto_destroy(struct ofproto *p)
687 struct ofport *ofport, *next_ofport;
693 shash_find_and_delete(&all_ofprotos, dpif_name(p->dpif));
695 ofproto_flush_flows__(p);
696 connmgr_destroy(p->connmgr);
697 classifier_destroy(&p->cls);
698 hmap_destroy(&p->facets);
701 netdev_monitor_destroy(p->netdev_monitor);
702 HMAP_FOR_EACH_SAFE (ofport, next_ofport, hmap_node, &p->ports) {
703 hmap_remove(&p->ports, &ofport->hmap_node);
706 shash_destroy(&p->port_by_name);
708 netflow_destroy(p->netflow);
709 ofproto_sflow_destroy(p->sflow);
711 mac_learning_destroy(p->ml);
716 free(p->serial_desc);
719 hmap_destroy(&p->ports);
725 ofproto_run(struct ofproto *p)
727 int error = ofproto_run1(p);
729 error = ofproto_run2(p, false);
735 process_port_change(struct ofproto *ofproto, int error, char *devname)
737 if (error == ENOBUFS) {
738 reinit_ports(ofproto);
740 update_port(ofproto, devname);
746 ofproto_run1(struct ofproto *p)
748 struct ofport *ofport;
753 if (shash_is_empty(&p->port_by_name)) {
757 for (i = 0; i < 50; i++) {
758 struct dpif_upcall packet;
760 error = dpif_recv(p->dpif, &packet);
762 if (error == ENODEV) {
763 /* Someone destroyed the datapath behind our back. The caller
764 * better destroy us and give up, because we're just going to
765 * spin from here on out. */
766 static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5);
767 VLOG_ERR_RL(&rl2, "%s: datapath was destroyed externally",
774 handle_upcall(p, &packet);
777 while ((error = dpif_port_poll(p->dpif, &devname)) != EAGAIN) {
778 process_port_change(p, error, devname);
780 while ((error = netdev_monitor_poll(p->netdev_monitor,
781 &devname)) != EAGAIN) {
782 process_port_change(p, error, devname);
785 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
786 ofport_run(p, ofport);
789 connmgr_run(p->connmgr, handle_openflow);
791 if (timer_expired(&p->next_expiration)) {
792 int delay = ofproto_expire(p);
793 timer_set_duration(&p->next_expiration, delay);
794 COVERAGE_INC(ofproto_expiration);
798 netflow_run(p->netflow);
801 ofproto_sflow_run(p->sflow);
808 ofproto_run2(struct ofproto *p, bool revalidate_all)
810 /* Figure out what we need to revalidate now, if anything. */
811 struct tag_set revalidate_set = p->revalidate_set;
812 if (p->need_revalidate) {
813 revalidate_all = true;
816 /* Clear the revalidation flags. */
817 tag_set_init(&p->revalidate_set);
818 p->need_revalidate = false;
820 /* Now revalidate if there's anything to do. */
821 if (revalidate_all || !tag_set_is_empty(&revalidate_set)) {
822 struct facet *facet, *next;
824 HMAP_FOR_EACH_SAFE (facet, next, hmap_node, &p->facets) {
826 || tag_set_intersects(&revalidate_set, facet->tags)) {
827 facet_revalidate(p, facet);
836 ofproto_wait(struct ofproto *p)
838 struct ofport *ofport;
840 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
843 dpif_recv_wait(p->dpif);
844 dpif_port_poll_wait(p->dpif);
845 netdev_monitor_poll_wait(p->netdev_monitor);
847 ofproto_sflow_wait(p->sflow);
849 if (!tag_set_is_empty(&p->revalidate_set)) {
850 poll_immediate_wake();
852 if (p->need_revalidate) {
853 /* Shouldn't happen, but if it does just go around again. */
854 VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
855 poll_immediate_wake();
857 timer_wait(&p->next_expiration);
859 connmgr_wait(p->connmgr);
863 ofproto_revalidate(struct ofproto *ofproto, tag_type tag)
865 tag_set_add(&ofproto->revalidate_set, tag);
869 ofproto_get_revalidate_set(struct ofproto *ofproto)
871 return &ofproto->revalidate_set;
875 ofproto_is_alive(const struct ofproto *p)
877 return connmgr_has_controllers(p->connmgr);
881 ofproto_get_ofproto_controller_info(const struct ofproto *ofproto,
884 connmgr_get_controller_info(ofproto->connmgr, info);
888 ofproto_free_ofproto_controller_info(struct shash *info)
890 struct shash_node *node;
892 SHASH_FOR_EACH (node, info) {
893 struct ofproto_controller_info *cinfo = node->data;
894 while (cinfo->pairs.n) {
895 free((char *) cinfo->pairs.values[--cinfo->pairs.n]);
902 /* Deletes port number 'odp_port' from the datapath for 'ofproto'.
904 * This is almost the same as calling dpif_port_del() directly on the
905 * datapath, but it also makes 'ofproto' close its open netdev for the port
906 * (if any). This makes it possible to create a new netdev of a different
907 * type under the same name, which otherwise the netdev library would refuse
908 * to do because of the conflict. (The netdev would eventually get closed on
909 * the next trip through ofproto_run(), but this interface is more direct.)
911 * Returns 0 if successful, otherwise a positive errno. */
913 ofproto_port_del(struct ofproto *ofproto, uint16_t odp_port)
915 struct ofport *ofport = get_port(ofproto, odp_port);
916 const char *name = ofport ? netdev_get_name(ofport->netdev) : "<unknown>";
919 error = dpif_port_del(ofproto->dpif, odp_port);
921 VLOG_ERR("%s: failed to remove port %"PRIu16" (%s) interface (%s)",
922 dpif_name(ofproto->dpif), odp_port, name, strerror(error));
924 /* 'name' is the netdev's name and update_port() is going to close the
925 * netdev. Just in case update_port() refers to 'name' after it
926 * destroys 'ofport', make a copy of it around the update_port()
928 char *devname = xstrdup(name);
929 update_port(ofproto, devname);
935 /* Checks if 'ofproto' thinks 'odp_port' should be included in floods. Returns
936 * true if 'odp_port' exists and should be included, false otherwise. */
938 ofproto_port_is_floodable(struct ofproto *ofproto, uint16_t odp_port)
940 struct ofport *ofport = get_port(ofproto, odp_port);
941 return ofport && !(ofport->opp.config & OFPPC_NO_FLOOD);
944 /* Sends 'packet' out of port 'port_no' within 'p'. If 'vlan_tci' is zero the
945 * packet will not have any 802.1Q hader; if it is nonzero, then the packet
946 * will be sent with the VLAN TCI specified by 'vlan_tci & ~VLAN_CFI'.
948 * Returns 0 if successful, otherwise a positive errno value. */
950 ofproto_send_packet(struct ofproto *ofproto,
951 uint32_t port_no, uint16_t vlan_tci,
952 const struct ofpbuf *packet)
954 struct ofpbuf odp_actions;
957 ofpbuf_init(&odp_actions, 32);
959 nl_msg_put_u32(&odp_actions, ODP_ACTION_ATTR_SET_DL_TCI,
960 ntohs(vlan_tci & ~VLAN_CFI));
962 nl_msg_put_u32(&odp_actions, ODP_ACTION_ATTR_OUTPUT, port_no);
963 error = dpif_execute(ofproto->dpif, odp_actions.data, odp_actions.size,
965 ofpbuf_uninit(&odp_actions);
968 VLOG_WARN_RL(&rl, "%s: failed to send packet on port %"PRIu32" (%s)",
969 dpif_name(ofproto->dpif), port_no, strerror(error));
974 /* Adds a flow to the OpenFlow flow table in 'p' that matches 'cls_rule' and
975 * performs the 'n_actions' actions in 'actions'. The new flow will not
978 * If cls_rule->priority is in the range of priorities supported by OpenFlow
979 * (0...65535, inclusive) then the flow will be visible to OpenFlow
980 * controllers; otherwise, it will be hidden.
982 * The caller retains ownership of 'cls_rule' and 'actions'. */
984 ofproto_add_flow(struct ofproto *p, const struct cls_rule *cls_rule,
985 const union ofp_action *actions, size_t n_actions)
988 rule = rule_create(cls_rule, actions, n_actions, 0, 0, 0, false);
989 rule_insert(p, rule);
993 ofproto_delete_flow(struct ofproto *ofproto, const struct cls_rule *target)
997 rule = rule_from_cls_rule(classifier_find_rule_exactly(&ofproto->cls,
1000 rule_remove(ofproto, rule);
1005 ofproto_flush_flows__(struct ofproto *ofproto)
1007 struct facet *facet, *next_facet;
1008 struct rule *rule, *next_rule;
1009 struct cls_cursor cursor;
1011 COVERAGE_INC(ofproto_flush);
1013 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
1014 /* Mark the facet as not installed so that facet_remove() doesn't
1015 * bother trying to uninstall it. There is no point in uninstalling it
1016 * individually since we are about to blow away all the facets with
1017 * dpif_flow_flush(). */
1018 facet->installed = false;
1019 facet->dp_packet_count = 0;
1020 facet->dp_byte_count = 0;
1021 facet_remove(ofproto, facet);
1024 cls_cursor_init(&cursor, &ofproto->cls, NULL);
1025 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
1026 rule_remove(ofproto, rule);
1029 dpif_flow_flush(ofproto->dpif);
1033 ofproto_flush_flows(struct ofproto *ofproto)
1035 ofproto_flush_flows__(ofproto);
1036 connmgr_flushed(ofproto->connmgr);
1040 reinit_ports(struct ofproto *p)
1042 struct dpif_port_dump dump;
1043 struct sset devnames;
1044 struct ofport *ofport;
1045 struct dpif_port dpif_port;
1046 const char *devname;
1048 COVERAGE_INC(ofproto_reinit_ports);
1050 sset_init(&devnames);
1051 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
1052 sset_add(&devnames, netdev_get_name(ofport->netdev));
1054 DPIF_PORT_FOR_EACH (&dpif_port, &dump, p->dpif) {
1055 sset_add(&devnames, dpif_port.name);
1058 SSET_FOR_EACH (devname, &devnames) {
1059 update_port(p, devname);
1061 sset_destroy(&devnames);
1064 /* Opens and returns a netdev for 'dpif_port', or a null pointer if the netdev
1065 * cannot be opened. On success, also fills in 'opp', in *HOST* byte order. */
1066 static struct netdev *
1067 ofport_open(const struct dpif_port *dpif_port, struct ofp_phy_port *opp)
1069 struct netdev_options netdev_options;
1070 enum netdev_flags flags;
1071 struct netdev *netdev;
1074 memset(&netdev_options, 0, sizeof netdev_options);
1075 netdev_options.name = dpif_port->name;
1076 netdev_options.type = dpif_port->type;
1077 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
1079 error = netdev_open(&netdev_options, &netdev);
1081 VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
1082 "cannot be opened (%s)",
1083 dpif_port->name, dpif_port->port_no,
1084 dpif_port->name, strerror(error));
1088 netdev_get_flags(netdev, &flags);
1090 opp->port_no = odp_port_to_ofp_port(dpif_port->port_no);
1091 netdev_get_etheraddr(netdev, opp->hw_addr);
1092 ovs_strzcpy(opp->name, dpif_port->name, sizeof opp->name);
1093 opp->config = flags & NETDEV_UP ? 0 : OFPPC_PORT_DOWN;
1094 opp->state = netdev_get_carrier(netdev) ? 0 : OFPPS_LINK_DOWN;
1095 netdev_get_features(netdev, &opp->curr, &opp->advertised,
1096 &opp->supported, &opp->peer);
1101 ofport_conflicts(const struct ofproto *p, const struct dpif_port *dpif_port)
1103 if (get_port(p, dpif_port->port_no)) {
1104 VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
1105 dpif_port->port_no);
1107 } else if (shash_find(&p->port_by_name, dpif_port->name)) {
1108 VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
1116 /* Returns true if most fields of 'a' and 'b' are equal. Differences in name,
1117 * port number, and 'config' bits other than OFPPC_PORT_DOWN are
1120 ofport_equal(const struct ofp_phy_port *a, const struct ofp_phy_port *b)
1122 BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
1123 return (!memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
1124 && a->state == b->state
1125 && !((a->config ^ b->config) & OFPPC_PORT_DOWN)
1126 && a->curr == b->curr
1127 && a->advertised == b->advertised
1128 && a->supported == b->supported
1129 && a->peer == b->peer);
1132 /* Adds an ofport to 'p' initialized based on the given 'netdev' and 'opp'.
1133 * The caller must ensure that 'p' does not have a conflicting ofport (that is,
1134 * one with the same name or port number). */
1136 ofport_install(struct ofproto *p,
1137 struct netdev *netdev, const struct ofp_phy_port *opp)
1139 const char *netdev_name = netdev_get_name(netdev);
1140 struct ofport *ofport;
1142 connmgr_send_port_status(p->connmgr, opp, OFPPR_ADD);
1144 /* Create ofport. */
1145 ofport = xmalloc(sizeof *ofport);
1146 ofport->netdev = netdev;
1148 ofport->odp_port = ofp_port_to_odp_port(opp->port_no);
1151 /* Add port to 'p'. */
1152 netdev_monitor_add(p->netdev_monitor, ofport->netdev);
1153 hmap_insert(&p->ports, &ofport->hmap_node, hash_int(ofport->odp_port, 0));
1154 shash_add(&p->port_by_name, netdev_name, ofport);
1156 ofproto_sflow_add_port(p->sflow, ofport->odp_port, netdev_name);
1160 /* Removes 'ofport' from 'p' and destroys it. */
1162 ofport_remove(struct ofproto *p, struct ofport *ofport)
1164 connmgr_send_port_status(p->connmgr, &ofport->opp, OFPPR_DELETE);
1166 netdev_monitor_remove(p->netdev_monitor, ofport->netdev);
1167 hmap_remove(&p->ports, &ofport->hmap_node);
1168 shash_delete(&p->port_by_name,
1169 shash_find(&p->port_by_name,
1170 netdev_get_name(ofport->netdev)));
1172 ofproto_sflow_del_port(p->sflow, ofport->odp_port);
1175 ofport_free(ofport);
1178 /* If 'ofproto' contains an ofport named 'name', removes it from 'ofproto' and
1181 ofport_remove_with_name(struct ofproto *ofproto, const char *name)
1183 struct ofport *port = shash_find_data(&ofproto->port_by_name, name);
1185 ofport_remove(ofproto, port);
1189 /* Updates 'port' within 'ofproto' with the new 'netdev' and 'opp'.
1191 * Does not handle a name or port number change. The caller must implement
1192 * such a change as a delete followed by an add. */
1194 ofport_modified(struct ofproto *ofproto, struct ofport *port,
1195 struct netdev *netdev, struct ofp_phy_port *opp)
1197 memcpy(port->opp.hw_addr, opp->hw_addr, ETH_ADDR_LEN);
1198 port->opp.config = ((port->opp.config & ~OFPPC_PORT_DOWN)
1199 | (opp->config & OFPPC_PORT_DOWN));
1200 port->opp.state = opp->state;
1201 port->opp.curr = opp->curr;
1202 port->opp.advertised = opp->advertised;
1203 port->opp.supported = opp->supported;
1204 port->opp.peer = opp->peer;
1206 netdev_close(port->netdev);
1207 port->netdev = netdev;
1209 connmgr_send_port_status(ofproto->connmgr, &port->opp, OFPPR_MODIFY);
1213 ofport_run(struct ofproto *ofproto, struct ofport *ofport)
1216 cfm_run(ofport->cfm);
1218 if (cfm_should_send_ccm(ofport->cfm)) {
1219 struct ofpbuf packet;
1222 ofpbuf_init(&packet, 0);
1223 ccm = eth_compose(&packet, eth_addr_ccm, ofport->opp.hw_addr,
1224 ETH_TYPE_CFM, sizeof *ccm);
1225 cfm_compose_ccm(ofport->cfm, ccm);
1226 ofproto_send_packet(ofproto, ofport->odp_port, 0, &packet);
1227 ofpbuf_uninit(&packet);
1233 ofport_wait(struct ofport *ofport)
1236 cfm_wait(ofport->cfm);
1241 ofport_free(struct ofport *ofport)
1244 cfm_destroy(ofport->cfm);
1245 netdev_close(ofport->netdev);
1250 static struct ofport *
1251 get_port(const struct ofproto *ofproto, uint16_t odp_port)
1253 struct ofport *port;
1255 HMAP_FOR_EACH_IN_BUCKET (port, hmap_node,
1256 hash_int(odp_port, 0), &ofproto->ports) {
1257 if (port->odp_port == odp_port) {
1265 update_port(struct ofproto *ofproto, const char *name)
1267 struct dpif_port dpif_port;
1268 struct ofp_phy_port opp;
1269 struct netdev *netdev;
1270 struct ofport *port;
1272 COVERAGE_INC(ofproto_update_port);
1274 /* Fetch 'name''s location and properties from the datapath. */
1275 netdev = (!dpif_port_query_by_name(ofproto->dpif, name, &dpif_port)
1276 ? ofport_open(&dpif_port, &opp)
1279 port = get_port(ofproto, dpif_port.port_no);
1280 if (port && !strcmp(netdev_get_name(port->netdev), name)) {
1281 /* 'name' hasn't changed location. Any properties changed? */
1282 if (!ofport_equal(&port->opp, &opp)) {
1283 ofport_modified(ofproto, port, netdev, &opp);
1285 netdev_close(netdev);
1288 /* If 'port' is nonnull then its name differs from 'name' and thus
1289 * we should delete it. If we think there's a port named 'name'
1290 * then its port number must be wrong now so delete it too. */
1292 ofport_remove(ofproto, port);
1294 ofport_remove_with_name(ofproto, name);
1295 ofport_install(ofproto, netdev, &opp);
1298 /* Any port named 'name' is gone now. */
1299 ofport_remove_with_name(ofproto, name);
1301 dpif_port_destroy(&dpif_port);
1305 init_ports(struct ofproto *p)
1307 struct dpif_port_dump dump;
1308 struct dpif_port dpif_port;
1310 DPIF_PORT_FOR_EACH (&dpif_port, &dump, p->dpif) {
1311 if (!ofport_conflicts(p, &dpif_port)) {
1312 struct ofp_phy_port opp;
1313 struct netdev *netdev;
1315 netdev = ofport_open(&dpif_port, &opp);
1317 ofport_install(p, netdev, &opp);
1325 /* Returns true if 'rule' should be hidden from the controller.
1327 * Rules with priority higher than UINT16_MAX are set up by ofproto itself
1328 * (e.g. by in-band control) and are intentionally hidden from the
1331 rule_is_hidden(const struct rule *rule)
1333 return rule->cr.priority > UINT16_MAX;
1336 /* Creates and returns a new rule initialized as specified.
1338 * The caller is responsible for inserting the rule into the classifier (with
1339 * rule_insert()). */
1340 static struct rule *
1341 rule_create(const struct cls_rule *cls_rule,
1342 const union ofp_action *actions, size_t n_actions,
1343 uint16_t idle_timeout, uint16_t hard_timeout,
1344 ovs_be64 flow_cookie, bool send_flow_removed)
1346 struct rule *rule = xzalloc(sizeof *rule);
1347 rule->cr = *cls_rule;
1348 rule->idle_timeout = idle_timeout;
1349 rule->hard_timeout = hard_timeout;
1350 rule->flow_cookie = flow_cookie;
1351 rule->used = rule->created = time_msec();
1352 rule->send_flow_removed = send_flow_removed;
1353 list_init(&rule->facets);
1354 if (n_actions > 0) {
1355 rule->n_actions = n_actions;
1356 rule->actions = xmemdup(actions, n_actions * sizeof *actions);
1362 static struct rule *
1363 rule_from_cls_rule(const struct cls_rule *cls_rule)
1365 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
1369 rule_free(struct rule *rule)
1371 free(rule->actions);
1375 /* Destroys 'rule' and iterates through all of its facets and revalidates them,
1376 * destroying any that no longer has a rule (which is probably all of them).
1378 * The caller must have already removed 'rule' from the classifier. */
1380 rule_destroy(struct ofproto *ofproto, struct rule *rule)
1382 struct facet *facet, *next_facet;
1383 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
1384 facet_revalidate(ofproto, facet);
1389 /* Returns true if 'rule' has an OpenFlow OFPAT_OUTPUT or OFPAT_ENQUEUE action
1390 * that outputs to 'out_port' (output to OFPP_FLOOD and OFPP_ALL doesn't
1393 rule_has_out_port(const struct rule *rule, ovs_be16 out_port)
1395 const union ofp_action *oa;
1396 struct actions_iterator i;
1398 if (out_port == htons(OFPP_NONE)) {
1401 for (oa = actions_first(&i, rule->actions, rule->n_actions); oa;
1402 oa = actions_next(&i)) {
1403 if (action_outputs_to_port(oa, out_port)) {
1410 /* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
1411 * 'packet', which arrived on 'in_port'.
1413 * Takes ownership of 'packet'. */
1415 execute_odp_actions(struct ofproto *ofproto, const struct flow *flow,
1416 const struct nlattr *odp_actions, size_t actions_len,
1417 struct ofpbuf *packet)
1419 if (actions_len == NLA_ALIGN(NLA_HDRLEN + sizeof(uint64_t))
1420 && odp_actions->nla_type == ODP_ACTION_ATTR_CONTROLLER) {
1421 /* As an optimization, avoid a round-trip from userspace to kernel to
1422 * userspace. This also avoids possibly filling up kernel packet
1423 * buffers along the way. */
1424 struct dpif_upcall upcall;
1426 upcall.type = DPIF_UC_ACTION;
1427 upcall.packet = packet;
1430 upcall.userdata = nl_attr_get_u64(odp_actions);
1431 upcall.sample_pool = 0;
1432 upcall.actions = NULL;
1433 upcall.actions_len = 0;
1435 send_packet_in(ofproto, &upcall, flow, false);
1441 error = dpif_execute(ofproto->dpif, odp_actions, actions_len, packet);
1442 ofpbuf_delete(packet);
1447 /* Executes the actions indicated by 'facet' on 'packet' and credits 'facet''s
1448 * statistics appropriately. 'packet' must have at least sizeof(struct
1449 * ofp_packet_in) bytes of headroom.
1451 * For correct results, 'packet' must actually be in 'facet''s flow; that is,
1452 * applying flow_extract() to 'packet' would yield the same flow as
1455 * 'facet' must have accurately composed ODP actions; that is, it must not be
1456 * in need of revalidation.
1458 * Takes ownership of 'packet'. */
1460 facet_execute(struct ofproto *ofproto, struct facet *facet,
1461 struct ofpbuf *packet)
1463 struct dpif_flow_stats stats;
1465 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
1467 flow_extract_stats(&facet->flow, packet, &stats);
1468 stats.used = time_msec();
1469 if (execute_odp_actions(ofproto, &facet->flow,
1470 facet->actions, facet->actions_len, packet)) {
1471 facet_update_stats(ofproto, facet, &stats);
1475 /* Executes the actions indicated by 'rule' on 'packet' and credits 'rule''s
1476 * statistics (or the statistics for one of its facets) appropriately.
1477 * 'packet' must have at least sizeof(struct ofp_packet_in) bytes of headroom.
1479 * 'packet' doesn't necessarily have to match 'rule'. 'rule' will be credited
1480 * with statistics for 'packet' either way.
1482 * Takes ownership of 'packet'. */
1484 rule_execute(struct ofproto *ofproto, struct rule *rule, uint16_t in_port,
1485 struct ofpbuf *packet)
1487 struct action_xlate_ctx ctx;
1488 struct ofpbuf *odp_actions;
1489 struct facet *facet;
1493 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
1495 flow_extract(packet, 0, in_port, &flow);
1497 /* First look for a related facet. If we find one, account it to that. */
1498 facet = facet_lookup_valid(ofproto, &flow);
1499 if (facet && facet->rule == rule) {
1500 facet_execute(ofproto, facet, packet);
1504 /* Otherwise, if 'rule' is in fact the correct rule for 'packet', then
1505 * create a new facet for it and use that. */
1506 if (rule_lookup(ofproto, &flow) == rule) {
1507 facet = facet_create(ofproto, rule, &flow, packet);
1508 facet_execute(ofproto, facet, packet);
1509 facet_install(ofproto, facet, true);
1513 /* We can't account anything to a facet. If we were to try, then that
1514 * facet would have a non-matching rule, busting our invariants. */
1515 action_xlate_ctx_init(&ctx, ofproto, &flow, packet);
1516 odp_actions = xlate_actions(&ctx, rule->actions, rule->n_actions);
1517 size = packet->size;
1518 if (execute_odp_actions(ofproto, &flow, odp_actions->data,
1519 odp_actions->size, packet)) {
1520 rule->used = time_msec();
1521 rule->packet_count++;
1522 rule->byte_count += size;
1523 flow_push_stats(ofproto, rule, &flow, 1, size, rule->used);
1525 ofpbuf_delete(odp_actions);
1528 /* Inserts 'rule' into 'p''s flow table. */
1530 rule_insert(struct ofproto *p, struct rule *rule)
1532 struct rule *displaced_rule;
1534 displaced_rule = rule_from_cls_rule(classifier_insert(&p->cls, &rule->cr));
1535 if (displaced_rule) {
1536 rule_destroy(p, displaced_rule);
1538 p->need_revalidate = true;
1541 /* Creates and returns a new facet within 'ofproto' owned by 'rule', given a
1542 * 'flow' and an example 'packet' within that flow.
1544 * The caller must already have determined that no facet with an identical
1545 * 'flow' exists in 'ofproto' and that 'flow' is the best match for 'rule' in
1546 * 'ofproto''s classifier table. */
1547 static struct facet *
1548 facet_create(struct ofproto *ofproto, struct rule *rule,
1549 const struct flow *flow, const struct ofpbuf *packet)
1551 struct facet *facet;
1553 facet = xzalloc(sizeof *facet);
1554 facet->used = time_msec();
1555 hmap_insert(&ofproto->facets, &facet->hmap_node, flow_hash(flow, 0));
1556 list_push_back(&rule->facets, &facet->list_node);
1558 facet->flow = *flow;
1559 netflow_flow_init(&facet->nf_flow);
1560 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, facet->used);
1562 facet_make_actions(ofproto, facet, packet);
1568 facet_free(struct facet *facet)
1570 free(facet->actions);
1574 /* Remove 'rule' from 'ofproto' and free up the associated memory:
1576 * - Removes 'rule' from the classifier.
1578 * - If 'rule' has facets, revalidates them (and possibly uninstalls and
1579 * destroys them), via rule_destroy().
1582 rule_remove(struct ofproto *ofproto, struct rule *rule)
1584 COVERAGE_INC(ofproto_del_rule);
1585 ofproto->need_revalidate = true;
1586 classifier_remove(&ofproto->cls, &rule->cr);
1587 rule_destroy(ofproto, rule);
1590 /* Remove 'facet' from 'ofproto' and free up the associated memory:
1592 * - If 'facet' was installed in the datapath, uninstalls it and updates its
1593 * rule's statistics, via facet_uninstall().
1595 * - Removes 'facet' from its rule and from ofproto->facets.
1598 facet_remove(struct ofproto *ofproto, struct facet *facet)
1600 facet_uninstall(ofproto, facet);
1601 facet_flush_stats(ofproto, facet);
1602 hmap_remove(&ofproto->facets, &facet->hmap_node);
1603 list_remove(&facet->list_node);
1607 /* Composes the ODP actions for 'facet' based on its rule's actions. */
1609 facet_make_actions(struct ofproto *p, struct facet *facet,
1610 const struct ofpbuf *packet)
1612 const struct rule *rule = facet->rule;
1613 struct ofpbuf *odp_actions;
1614 struct action_xlate_ctx ctx;
1616 action_xlate_ctx_init(&ctx, p, &facet->flow, packet);
1617 odp_actions = xlate_actions(&ctx, rule->actions, rule->n_actions);
1618 facet->tags = ctx.tags;
1619 facet->may_install = ctx.may_set_up_flow;
1620 facet->nf_flow.output_iface = ctx.nf_output_iface;
1622 if (facet->actions_len != odp_actions->size
1623 || memcmp(facet->actions, odp_actions->data, odp_actions->size)) {
1624 free(facet->actions);
1625 facet->actions_len = odp_actions->size;
1626 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
1629 ofpbuf_delete(odp_actions);
1633 facet_put__(struct ofproto *ofproto, struct facet *facet,
1634 const struct nlattr *actions, size_t actions_len,
1635 struct dpif_flow_stats *stats)
1637 struct odputil_keybuf keybuf;
1638 enum dpif_flow_put_flags flags;
1641 flags = DPIF_FP_CREATE | DPIF_FP_MODIFY;
1643 flags |= DPIF_FP_ZERO_STATS;
1644 facet->dp_packet_count = 0;
1645 facet->dp_byte_count = 0;
1648 ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1649 odp_flow_key_from_flow(&key, &facet->flow);
1651 return dpif_flow_put(ofproto->dpif, flags, key.data, key.size,
1652 actions, actions_len, stats);
1655 /* If 'facet' is installable, inserts or re-inserts it into 'p''s datapath. If
1656 * 'zero_stats' is true, clears any existing statistics from the datapath for
1659 facet_install(struct ofproto *p, struct facet *facet, bool zero_stats)
1661 struct dpif_flow_stats stats;
1663 if (facet->may_install
1664 && !facet_put__(p, facet, facet->actions, facet->actions_len,
1665 zero_stats ? &stats : NULL)) {
1666 facet->installed = true;
1670 /* Ensures that the bytes in 'facet', plus 'extra_bytes', have been passed up
1671 * to the accounting hook function in the ofhooks structure. */
1673 facet_account(struct ofproto *ofproto,
1674 struct facet *facet, uint64_t extra_bytes)
1676 uint64_t total_bytes = facet->byte_count + extra_bytes;
1678 if (ofproto->ofhooks->account_flow_cb
1679 && total_bytes > facet->accounted_bytes)
1681 ofproto->ofhooks->account_flow_cb(
1682 &facet->flow, facet->tags, facet->actions, facet->actions_len,
1683 total_bytes - facet->accounted_bytes, ofproto->aux);
1684 facet->accounted_bytes = total_bytes;
1688 /* If 'rule' is installed in the datapath, uninstalls it. */
1690 facet_uninstall(struct ofproto *p, struct facet *facet)
1692 if (facet->installed) {
1693 struct odputil_keybuf keybuf;
1694 struct dpif_flow_stats stats;
1697 ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1698 odp_flow_key_from_flow(&key, &facet->flow);
1700 if (!dpif_flow_del(p->dpif, key.data, key.size, &stats)) {
1701 facet_update_stats(p, facet, &stats);
1703 facet->installed = false;
1704 facet->dp_packet_count = 0;
1705 facet->dp_byte_count = 0;
1707 assert(facet->dp_packet_count == 0);
1708 assert(facet->dp_byte_count == 0);
1712 /* Returns true if the only action for 'facet' is to send to the controller.
1713 * (We don't report NetFlow expiration messages for such facets because they
1714 * are just part of the control logic for the network, not real traffic). */
1716 facet_is_controller_flow(struct facet *facet)
1719 && facet->rule->n_actions == 1
1720 && action_outputs_to_port(&facet->rule->actions[0],
1721 htons(OFPP_CONTROLLER)));
1724 /* Folds all of 'facet''s statistics into its rule. Also updates the
1725 * accounting ofhook and emits a NetFlow expiration if appropriate. All of
1726 * 'facet''s statistics in the datapath should have been zeroed and folded into
1727 * its packet and byte counts before this function is called. */
1729 facet_flush_stats(struct ofproto *ofproto, struct facet *facet)
1731 assert(!facet->dp_byte_count);
1732 assert(!facet->dp_packet_count);
1734 facet_push_stats(ofproto, facet);
1735 facet_account(ofproto, facet, 0);
1737 if (ofproto->netflow && !facet_is_controller_flow(facet)) {
1738 struct ofexpired expired;
1739 expired.flow = facet->flow;
1740 expired.packet_count = facet->packet_count;
1741 expired.byte_count = facet->byte_count;
1742 expired.used = facet->used;
1743 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
1746 facet->rule->packet_count += facet->packet_count;
1747 facet->rule->byte_count += facet->byte_count;
1749 /* Reset counters to prevent double counting if 'facet' ever gets
1751 facet->packet_count = 0;
1752 facet->byte_count = 0;
1753 facet->rs_packet_count = 0;
1754 facet->rs_byte_count = 0;
1755 facet->accounted_bytes = 0;
1757 netflow_flow_clear(&facet->nf_flow);
1760 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
1761 * Returns it if found, otherwise a null pointer.
1763 * The returned facet might need revalidation; use facet_lookup_valid()
1764 * instead if that is important. */
1765 static struct facet *
1766 facet_find(struct ofproto *ofproto, const struct flow *flow)
1768 struct facet *facet;
1770 HMAP_FOR_EACH_WITH_HASH (facet, hmap_node, flow_hash(flow, 0),
1772 if (flow_equal(flow, &facet->flow)) {
1780 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
1781 * Returns it if found, otherwise a null pointer.
1783 * The returned facet is guaranteed to be valid. */
1784 static struct facet *
1785 facet_lookup_valid(struct ofproto *ofproto, const struct flow *flow)
1787 struct facet *facet = facet_find(ofproto, flow);
1789 /* The facet we found might not be valid, since we could be in need of
1790 * revalidation. If it is not valid, don't return it. */
1792 && ofproto->need_revalidate
1793 && !facet_revalidate(ofproto, facet)) {
1794 COVERAGE_INC(ofproto_invalidated);
1801 /* Re-searches 'ofproto''s classifier for a rule matching 'facet':
1803 * - If the rule found is different from 'facet''s current rule, moves
1804 * 'facet' to the new rule and recompiles its actions.
1806 * - If the rule found is the same as 'facet''s current rule, leaves 'facet'
1807 * where it is and recompiles its actions anyway.
1809 * - If there is none, destroys 'facet'.
1811 * Returns true if 'facet' still exists, false if it has been destroyed. */
1813 facet_revalidate(struct ofproto *ofproto, struct facet *facet)
1815 struct action_xlate_ctx ctx;
1816 struct ofpbuf *odp_actions;
1817 struct rule *new_rule;
1818 bool actions_changed;
1820 COVERAGE_INC(facet_revalidate);
1822 /* Determine the new rule. */
1823 new_rule = rule_lookup(ofproto, &facet->flow);
1825 /* No new rule, so delete the facet. */
1826 facet_remove(ofproto, facet);
1830 /* Calculate new ODP actions.
1832 * We do not modify any 'facet' state yet, because we might need to, e.g.,
1833 * emit a NetFlow expiration and, if so, we need to have the old state
1834 * around to properly compose it. */
1835 action_xlate_ctx_init(&ctx, ofproto, &facet->flow, NULL);
1836 odp_actions = xlate_actions(&ctx, new_rule->actions, new_rule->n_actions);
1837 actions_changed = (facet->actions_len != odp_actions->size
1838 || memcmp(facet->actions, odp_actions->data,
1839 facet->actions_len));
1841 /* If the ODP actions changed or the installability changed, then we need
1842 * to talk to the datapath. */
1843 if (actions_changed || ctx.may_set_up_flow != facet->installed) {
1844 if (ctx.may_set_up_flow) {
1845 struct dpif_flow_stats stats;
1847 facet_put__(ofproto, facet,
1848 odp_actions->data, odp_actions->size, &stats);
1849 facet_update_stats(ofproto, facet, &stats);
1851 facet_uninstall(ofproto, facet);
1854 /* The datapath flow is gone or has zeroed stats, so push stats out of
1855 * 'facet' into 'rule'. */
1856 facet_flush_stats(ofproto, facet);
1859 /* Update 'facet' now that we've taken care of all the old state. */
1860 facet->tags = ctx.tags;
1861 facet->nf_flow.output_iface = ctx.nf_output_iface;
1862 facet->may_install = ctx.may_set_up_flow;
1863 if (actions_changed) {
1864 free(facet->actions);
1865 facet->actions_len = odp_actions->size;
1866 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
1868 if (facet->rule != new_rule) {
1869 COVERAGE_INC(facet_changed_rule);
1870 list_remove(&facet->list_node);
1871 list_push_back(&new_rule->facets, &facet->list_node);
1872 facet->rule = new_rule;
1873 facet->used = new_rule->created;
1874 facet->rs_used = facet->used;
1877 ofpbuf_delete(odp_actions);
1883 send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh,
1886 struct ofpbuf *buf = ofputil_encode_error_msg(error, oh);
1888 COVERAGE_INC(ofproto_error);
1889 ofconn_send_reply(ofconn, buf);
1894 handle_echo_request(struct ofconn *ofconn, const struct ofp_header *oh)
1896 ofconn_send_reply(ofconn, make_echo_reply(oh));
1901 handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh)
1903 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1904 struct ofp_switch_features *osf;
1906 struct ofport *port;
1908 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
1909 osf->datapath_id = htonll(ofproto->datapath_id);
1910 osf->n_buffers = htonl(pktbuf_capacity());
1912 osf->capabilities = htonl(OFPC_FLOW_STATS | OFPC_TABLE_STATS |
1913 OFPC_PORT_STATS | OFPC_ARP_MATCH_IP);
1914 osf->actions = htonl((1u << OFPAT_OUTPUT) |
1915 (1u << OFPAT_SET_VLAN_VID) |
1916 (1u << OFPAT_SET_VLAN_PCP) |
1917 (1u << OFPAT_STRIP_VLAN) |
1918 (1u << OFPAT_SET_DL_SRC) |
1919 (1u << OFPAT_SET_DL_DST) |
1920 (1u << OFPAT_SET_NW_SRC) |
1921 (1u << OFPAT_SET_NW_DST) |
1922 (1u << OFPAT_SET_NW_TOS) |
1923 (1u << OFPAT_SET_TP_SRC) |
1924 (1u << OFPAT_SET_TP_DST) |
1925 (1u << OFPAT_ENQUEUE));
1927 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
1928 hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
1931 ofconn_send_reply(ofconn, buf);
1936 handle_get_config_request(struct ofconn *ofconn, const struct ofp_header *oh)
1938 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1940 struct ofp_switch_config *osc;
1944 /* Figure out flags. */
1945 dpif_get_drop_frags(ofproto->dpif, &drop_frags);
1946 flags = drop_frags ? OFPC_FRAG_DROP : OFPC_FRAG_NORMAL;
1949 osc = make_openflow_xid(sizeof *osc, OFPT_GET_CONFIG_REPLY, oh->xid, &buf);
1950 osc->flags = htons(flags);
1951 osc->miss_send_len = htons(ofconn_get_miss_send_len(ofconn));
1952 ofconn_send_reply(ofconn, buf);
1958 handle_set_config(struct ofconn *ofconn, const struct ofp_switch_config *osc)
1960 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1961 uint16_t flags = ntohs(osc->flags);
1963 if (ofconn_get_type(ofconn) == OFCONN_PRIMARY
1964 && ofconn_get_role(ofconn) != NX_ROLE_SLAVE) {
1965 switch (flags & OFPC_FRAG_MASK) {
1966 case OFPC_FRAG_NORMAL:
1967 dpif_set_drop_frags(ofproto->dpif, false);
1969 case OFPC_FRAG_DROP:
1970 dpif_set_drop_frags(ofproto->dpif, true);
1973 VLOG_WARN_RL(&rl, "requested bad fragment mode (flags=%"PRIx16")",
1979 ofconn_set_miss_send_len(ofconn, ntohs(osc->miss_send_len));
1984 static void do_xlate_actions(const union ofp_action *in, size_t n_in,
1985 struct action_xlate_ctx *ctx);
1988 add_output_action(struct action_xlate_ctx *ctx, uint16_t port)
1990 const struct ofport *ofport = get_port(ctx->ofproto, port);
1993 if (ofport->opp.config & OFPPC_NO_FWD) {
1994 /* Forwarding disabled on port. */
1999 * We don't have an ofport record for this port, but it doesn't hurt to
2000 * allow forwarding to it anyhow. Maybe such a port will appear later
2001 * and we're pre-populating the flow table.
2005 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_OUTPUT, port);
2006 ctx->nf_output_iface = port;
2009 static struct rule *
2010 rule_lookup(struct ofproto *ofproto, const struct flow *flow)
2012 return rule_from_cls_rule(classifier_lookup(&ofproto->cls, flow));
2016 xlate_table_action(struct action_xlate_ctx *ctx, uint16_t in_port)
2018 if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
2019 uint16_t old_in_port;
2022 /* Look up a flow with 'in_port' as the input port. Then restore the
2023 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2024 * have surprising behavior). */
2025 old_in_port = ctx->flow.in_port;
2026 ctx->flow.in_port = in_port;
2027 rule = rule_lookup(ctx->ofproto, &ctx->flow);
2028 ctx->flow.in_port = old_in_port;
2030 if (ctx->resubmit_hook) {
2031 ctx->resubmit_hook(ctx, rule);
2036 do_xlate_actions(rule->actions, rule->n_actions, ctx);
2040 static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
2042 VLOG_ERR_RL(&recurse_rl, "NXAST_RESUBMIT recursed over %d times",
2043 MAX_RESUBMIT_RECURSION);
2048 flood_packets(struct ofproto *ofproto, uint16_t odp_in_port, uint32_t mask,
2049 uint16_t *nf_output_iface, struct ofpbuf *odp_actions)
2051 struct ofport *ofport;
2053 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
2054 uint16_t odp_port = ofport->odp_port;
2055 if (odp_port != odp_in_port && !(ofport->opp.config & mask)) {
2056 nl_msg_put_u32(odp_actions, ODP_ACTION_ATTR_OUTPUT, odp_port);
2059 *nf_output_iface = NF_OUT_FLOOD;
2063 xlate_output_action__(struct action_xlate_ctx *ctx,
2064 uint16_t port, uint16_t max_len)
2067 uint16_t prev_nf_output_iface = ctx->nf_output_iface;
2069 ctx->nf_output_iface = NF_OUT_DROP;
2073 add_output_action(ctx, ctx->flow.in_port);
2076 xlate_table_action(ctx, ctx->flow.in_port);
2079 if (!ctx->ofproto->ofhooks->normal_cb(&ctx->flow, ctx->packet,
2080 ctx->odp_actions, &ctx->tags,
2081 &ctx->nf_output_iface,
2082 ctx->ofproto->aux)) {
2083 COVERAGE_INC(ofproto_uninstallable);
2084 ctx->may_set_up_flow = false;
2088 flood_packets(ctx->ofproto, ctx->flow.in_port, OFPPC_NO_FLOOD,
2089 &ctx->nf_output_iface, ctx->odp_actions);
2092 flood_packets(ctx->ofproto, ctx->flow.in_port, 0,
2093 &ctx->nf_output_iface, ctx->odp_actions);
2095 case OFPP_CONTROLLER:
2096 nl_msg_put_u64(ctx->odp_actions, ODP_ACTION_ATTR_CONTROLLER, max_len);
2099 add_output_action(ctx, ODPP_LOCAL);
2102 odp_port = ofp_port_to_odp_port(port);
2103 if (odp_port != ctx->flow.in_port) {
2104 add_output_action(ctx, odp_port);
2109 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2110 ctx->nf_output_iface = NF_OUT_FLOOD;
2111 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
2112 ctx->nf_output_iface = prev_nf_output_iface;
2113 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2114 ctx->nf_output_iface != NF_OUT_FLOOD) {
2115 ctx->nf_output_iface = NF_OUT_MULTI;
2120 xlate_output_action(struct action_xlate_ctx *ctx,
2121 const struct ofp_action_output *oao)
2123 xlate_output_action__(ctx, ntohs(oao->port), ntohs(oao->max_len));
2126 /* If the final ODP action in 'ctx' is "pop priority", drop it, as an
2127 * optimization, because we're going to add another action that sets the
2128 * priority immediately after, or because there are no actions following the
2131 remove_pop_action(struct action_xlate_ctx *ctx)
2133 if (ctx->odp_actions->size == ctx->last_pop_priority) {
2134 ctx->odp_actions->size -= NLA_ALIGN(NLA_HDRLEN);
2135 ctx->last_pop_priority = -1;
2140 add_pop_action(struct action_xlate_ctx *ctx)
2142 if (ctx->odp_actions->size != ctx->last_pop_priority) {
2143 nl_msg_put_flag(ctx->odp_actions, ODP_ACTION_ATTR_POP_PRIORITY);
2144 ctx->last_pop_priority = ctx->odp_actions->size;
2149 xlate_enqueue_action(struct action_xlate_ctx *ctx,
2150 const struct ofp_action_enqueue *oae)
2152 uint16_t ofp_port, odp_port;
2156 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(oae->queue_id),
2159 /* Fall back to ordinary output action. */
2160 xlate_output_action__(ctx, ntohs(oae->port), 0);
2164 /* Figure out ODP output port. */
2165 ofp_port = ntohs(oae->port);
2166 if (ofp_port != OFPP_IN_PORT) {
2167 odp_port = ofp_port_to_odp_port(ofp_port);
2169 odp_port = ctx->flow.in_port;
2172 /* Add ODP actions. */
2173 remove_pop_action(ctx);
2174 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_SET_PRIORITY, priority);
2175 add_output_action(ctx, odp_port);
2176 add_pop_action(ctx);
2178 /* Update NetFlow output port. */
2179 if (ctx->nf_output_iface == NF_OUT_DROP) {
2180 ctx->nf_output_iface = odp_port;
2181 } else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
2182 ctx->nf_output_iface = NF_OUT_MULTI;
2187 xlate_set_queue_action(struct action_xlate_ctx *ctx,
2188 const struct nx_action_set_queue *nasq)
2193 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(nasq->queue_id),
2196 /* Couldn't translate queue to a priority, so ignore. A warning
2197 * has already been logged. */
2201 remove_pop_action(ctx);
2202 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_SET_PRIORITY, priority);
2206 xlate_set_dl_tci(struct action_xlate_ctx *ctx)
2208 ovs_be16 tci = ctx->flow.vlan_tci;
2209 if (!(tci & htons(VLAN_CFI))) {
2210 nl_msg_put_flag(ctx->odp_actions, ODP_ACTION_ATTR_STRIP_VLAN);
2212 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_TCI,
2213 tci & ~htons(VLAN_CFI));
2217 struct xlate_reg_state {
2223 save_reg_state(const struct action_xlate_ctx *ctx,
2224 struct xlate_reg_state *state)
2226 state->vlan_tci = ctx->flow.vlan_tci;
2227 state->tun_id = ctx->flow.tun_id;
2231 update_reg_state(struct action_xlate_ctx *ctx,
2232 const struct xlate_reg_state *state)
2234 if (ctx->flow.vlan_tci != state->vlan_tci) {
2235 xlate_set_dl_tci(ctx);
2237 if (ctx->flow.tun_id != state->tun_id) {
2238 nl_msg_put_be64(ctx->odp_actions,
2239 ODP_ACTION_ATTR_SET_TUNNEL, ctx->flow.tun_id);
2244 xlate_nicira_action(struct action_xlate_ctx *ctx,
2245 const struct nx_action_header *nah)
2247 const struct nx_action_resubmit *nar;
2248 const struct nx_action_set_tunnel *nast;
2249 const struct nx_action_set_queue *nasq;
2250 const struct nx_action_multipath *nam;
2251 const struct nx_action_autopath *naa;
2252 enum nx_action_subtype subtype = ntohs(nah->subtype);
2253 const struct ofhooks *ofhooks = ctx->ofproto->ofhooks;
2254 struct xlate_reg_state state;
2255 uint16_t autopath_port;
2258 assert(nah->vendor == htonl(NX_VENDOR_ID));
2260 case NXAST_RESUBMIT:
2261 nar = (const struct nx_action_resubmit *) nah;
2262 xlate_table_action(ctx, ofp_port_to_odp_port(ntohs(nar->in_port)));
2265 case NXAST_SET_TUNNEL:
2266 nast = (const struct nx_action_set_tunnel *) nah;
2267 tun_id = htonll(ntohl(nast->tun_id));
2268 nl_msg_put_be64(ctx->odp_actions, ODP_ACTION_ATTR_SET_TUNNEL, tun_id);
2269 ctx->flow.tun_id = tun_id;
2272 case NXAST_DROP_SPOOFED_ARP:
2273 if (ctx->flow.dl_type == htons(ETH_TYPE_ARP)) {
2274 nl_msg_put_flag(ctx->odp_actions,
2275 ODP_ACTION_ATTR_DROP_SPOOFED_ARP);
2279 case NXAST_SET_QUEUE:
2280 nasq = (const struct nx_action_set_queue *) nah;
2281 xlate_set_queue_action(ctx, nasq);
2284 case NXAST_POP_QUEUE:
2285 add_pop_action(ctx);
2288 case NXAST_REG_MOVE:
2289 save_reg_state(ctx, &state);
2290 nxm_execute_reg_move((const struct nx_action_reg_move *) nah,
2292 update_reg_state(ctx, &state);
2295 case NXAST_REG_LOAD:
2296 save_reg_state(ctx, &state);
2297 nxm_execute_reg_load((const struct nx_action_reg_load *) nah,
2299 update_reg_state(ctx, &state);
2303 /* Nothing to do. */
2306 case NXAST_SET_TUNNEL64:
2307 tun_id = ((const struct nx_action_set_tunnel64 *) nah)->tun_id;
2308 nl_msg_put_be64(ctx->odp_actions, ODP_ACTION_ATTR_SET_TUNNEL, tun_id);
2309 ctx->flow.tun_id = tun_id;
2312 case NXAST_MULTIPATH:
2313 nam = (const struct nx_action_multipath *) nah;
2314 multipath_execute(nam, &ctx->flow);
2317 case NXAST_AUTOPATH:
2318 naa = (const struct nx_action_autopath *) nah;
2319 autopath_port = (ofhooks->autopath_cb
2320 ? ofhooks->autopath_cb(&ctx->flow, ntohl(naa->id),
2321 &ctx->tags, ctx->ofproto->aux)
2323 autopath_execute(naa, &ctx->flow, autopath_port);
2326 /* If you add a new action here that modifies flow data, don't forget to
2327 * update the flow key in ctx->flow at the same time. */
2329 case NXAST_SNAT__OBSOLETE:
2331 VLOG_DBG_RL(&rl, "unknown Nicira action type %d", (int) subtype);
2337 do_xlate_actions(const union ofp_action *in, size_t n_in,
2338 struct action_xlate_ctx *ctx)
2340 struct actions_iterator iter;
2341 const union ofp_action *ia;
2342 const struct ofport *port;
2344 port = get_port(ctx->ofproto, ctx->flow.in_port);
2345 if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
2346 port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
2347 ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
2348 /* Drop this flow. */
2352 for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
2353 enum ofp_action_type type = ntohs(ia->type);
2354 const struct ofp_action_dl_addr *oada;
2358 xlate_output_action(ctx, &ia->output);
2361 case OFPAT_SET_VLAN_VID:
2362 ctx->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
2363 ctx->flow.vlan_tci |= ia->vlan_vid.vlan_vid | htons(VLAN_CFI);
2364 xlate_set_dl_tci(ctx);
2367 case OFPAT_SET_VLAN_PCP:
2368 ctx->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
2369 ctx->flow.vlan_tci |= htons(
2370 (ia->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
2371 xlate_set_dl_tci(ctx);
2374 case OFPAT_STRIP_VLAN:
2375 ctx->flow.vlan_tci = htons(0);
2376 xlate_set_dl_tci(ctx);
2379 case OFPAT_SET_DL_SRC:
2380 oada = ((struct ofp_action_dl_addr *) ia);
2381 nl_msg_put_unspec(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_SRC,
2382 oada->dl_addr, ETH_ADDR_LEN);
2383 memcpy(ctx->flow.dl_src, oada->dl_addr, ETH_ADDR_LEN);
2386 case OFPAT_SET_DL_DST:
2387 oada = ((struct ofp_action_dl_addr *) ia);
2388 nl_msg_put_unspec(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_DST,
2389 oada->dl_addr, ETH_ADDR_LEN);
2390 memcpy(ctx->flow.dl_dst, oada->dl_addr, ETH_ADDR_LEN);
2393 case OFPAT_SET_NW_SRC:
2394 nl_msg_put_be32(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_SRC,
2395 ia->nw_addr.nw_addr);
2396 ctx->flow.nw_src = ia->nw_addr.nw_addr;
2399 case OFPAT_SET_NW_DST:
2400 nl_msg_put_be32(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_DST,
2401 ia->nw_addr.nw_addr);
2402 ctx->flow.nw_dst = ia->nw_addr.nw_addr;
2405 case OFPAT_SET_NW_TOS:
2406 nl_msg_put_u8(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_TOS,
2408 ctx->flow.nw_tos = ia->nw_tos.nw_tos;
2411 case OFPAT_SET_TP_SRC:
2412 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_TP_SRC,
2413 ia->tp_port.tp_port);
2414 ctx->flow.tp_src = ia->tp_port.tp_port;
2417 case OFPAT_SET_TP_DST:
2418 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_TP_DST,
2419 ia->tp_port.tp_port);
2420 ctx->flow.tp_dst = ia->tp_port.tp_port;
2424 xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
2428 xlate_enqueue_action(ctx, (const struct ofp_action_enqueue *) ia);
2432 VLOG_DBG_RL(&rl, "unknown action type %d", (int) type);
2439 action_xlate_ctx_init(struct action_xlate_ctx *ctx,
2440 struct ofproto *ofproto, const struct flow *flow,
2441 const struct ofpbuf *packet)
2443 ctx->ofproto = ofproto;
2445 ctx->packet = packet;
2446 ctx->resubmit_hook = NULL;
2447 ctx->check_special = true;
2451 ofproto_process_cfm(struct ofproto *ofproto, const struct flow *flow,
2452 const struct ofpbuf *packet)
2454 struct ofport *ofport;
2456 ofport = get_port(ofproto, flow->in_port);
2457 if (ofport && ofport->cfm) {
2458 cfm_process_heartbeat(ofport->cfm, packet);
2462 static struct ofpbuf *
2463 xlate_actions(struct action_xlate_ctx *ctx,
2464 const union ofp_action *in, size_t n_in)
2466 COVERAGE_INC(ofproto_ofp2odp);
2468 ctx->odp_actions = ofpbuf_new(512);
2470 ctx->may_set_up_flow = true;
2471 ctx->nf_output_iface = NF_OUT_DROP;
2473 ctx->last_pop_priority = -1;
2475 if (ctx->check_special && cfm_should_process_flow(&ctx->flow)) {
2477 ofproto_process_cfm(ctx->ofproto, &ctx->flow, ctx->packet);
2479 ctx->may_set_up_flow = false;
2480 } else if (ctx->check_special
2481 && ctx->ofproto->ofhooks->special_cb
2482 && !ctx->ofproto->ofhooks->special_cb(&ctx->flow, ctx->packet,
2483 ctx->ofproto->aux)) {
2484 ctx->may_set_up_flow = false;
2486 do_xlate_actions(in, n_in, ctx);
2489 remove_pop_action(ctx);
2491 /* Check with in-band control to see if we're allowed to set up this
2493 if (!connmgr_may_set_up_flow(ctx->ofproto->connmgr, &ctx->flow,
2494 ctx->odp_actions->data,
2495 ctx->odp_actions->size)) {
2496 ctx->may_set_up_flow = false;
2499 return ctx->odp_actions;
2502 /* Checks whether 'ofconn' is a slave controller. If so, returns an OpenFlow
2503 * error message code (composed with ofp_mkerr()) for the caller to propagate
2504 * upward. Otherwise, returns 0.
2506 * The log message mentions 'msg_type'. */
2508 reject_slave_controller(struct ofconn *ofconn, const const char *msg_type)
2510 if (ofconn_get_type(ofconn) == OFCONN_PRIMARY
2511 && ofconn_get_role(ofconn) == NX_ROLE_SLAVE) {
2512 static struct vlog_rate_limit perm_rl = VLOG_RATE_LIMIT_INIT(1, 5);
2513 VLOG_WARN_RL(&perm_rl, "rejecting %s message from slave controller",
2516 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
2523 handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
2525 struct ofproto *p = ofconn_get_ofproto(ofconn);
2526 struct ofp_packet_out *opo;
2527 struct ofpbuf payload, *buffer;
2528 union ofp_action *ofp_actions;
2529 struct action_xlate_ctx ctx;
2530 struct ofpbuf *odp_actions;
2531 struct ofpbuf request;
2533 size_t n_ofp_actions;
2537 COVERAGE_INC(ofproto_packet_out);
2539 error = reject_slave_controller(ofconn, "OFPT_PACKET_OUT");
2544 /* Get ofp_packet_out. */
2545 ofpbuf_use_const(&request, oh, ntohs(oh->length));
2546 opo = ofpbuf_pull(&request, offsetof(struct ofp_packet_out, actions));
2549 error = ofputil_pull_actions(&request, ntohs(opo->actions_len),
2550 &ofp_actions, &n_ofp_actions);
2556 if (opo->buffer_id != htonl(UINT32_MAX)) {
2557 error = ofconn_pktbuf_retrieve(ofconn, ntohl(opo->buffer_id),
2559 if (error || !buffer) {
2568 /* Extract flow, check actions. */
2569 flow_extract(&payload, 0, ofp_port_to_odp_port(ntohs(opo->in_port)),
2571 error = validate_actions(ofp_actions, n_ofp_actions, &flow, p->max_ports);
2577 action_xlate_ctx_init(&ctx, p, &flow, &payload);
2578 odp_actions = xlate_actions(&ctx, ofp_actions, n_ofp_actions);
2579 dpif_execute(p->dpif, odp_actions->data, odp_actions->size, &payload);
2580 ofpbuf_delete(odp_actions);
2583 ofpbuf_delete(buffer);
2588 update_port_config(struct ofproto *p, struct ofport *port,
2589 uint32_t config, uint32_t mask)
2591 mask &= config ^ port->opp.config;
2592 if (mask & OFPPC_PORT_DOWN) {
2593 if (config & OFPPC_PORT_DOWN) {
2594 netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
2596 netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
2599 #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | \
2600 OFPPC_NO_FWD | OFPPC_NO_FLOOD)
2601 if (mask & REVALIDATE_BITS) {
2602 COVERAGE_INC(ofproto_costly_flags);
2603 port->opp.config ^= mask & REVALIDATE_BITS;
2604 p->need_revalidate = true;
2606 #undef REVALIDATE_BITS
2607 if (mask & OFPPC_NO_PACKET_IN) {
2608 port->opp.config ^= OFPPC_NO_PACKET_IN;
2613 handle_port_mod(struct ofconn *ofconn, const struct ofp_header *oh)
2615 struct ofproto *p = ofconn_get_ofproto(ofconn);
2616 const struct ofp_port_mod *opm = (const struct ofp_port_mod *) oh;
2617 struct ofport *port;
2620 error = reject_slave_controller(ofconn, "OFPT_PORT_MOD");
2625 port = get_port(p, ofp_port_to_odp_port(ntohs(opm->port_no)));
2627 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
2628 } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
2629 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR);
2631 update_port_config(p, port, ntohl(opm->config), ntohl(opm->mask));
2632 if (opm->advertise) {
2633 netdev_set_advertisements(port->netdev, ntohl(opm->advertise));
2639 static struct ofpbuf *
2640 make_ofp_stats_reply(ovs_be32 xid, ovs_be16 type, size_t body_len)
2642 struct ofp_stats_reply *osr;
2645 msg = ofpbuf_new(MIN(sizeof *osr + body_len, UINT16_MAX));
2646 osr = put_openflow_xid(sizeof *osr, OFPT_STATS_REPLY, xid, msg);
2648 osr->flags = htons(0);
2652 static struct ofpbuf *
2653 start_ofp_stats_reply(const struct ofp_header *request, size_t body_len)
2655 const struct ofp_stats_request *osr
2656 = (const struct ofp_stats_request *) request;
2657 return make_ofp_stats_reply(osr->header.xid, osr->type, body_len);
2661 append_ofp_stats_reply(size_t nbytes, struct ofconn *ofconn,
2662 struct ofpbuf **msgp)
2664 struct ofpbuf *msg = *msgp;
2665 assert(nbytes <= UINT16_MAX - sizeof(struct ofp_stats_reply));
2666 if (nbytes + msg->size > UINT16_MAX) {
2667 struct ofp_stats_reply *reply = msg->data;
2668 reply->flags = htons(OFPSF_REPLY_MORE);
2669 *msgp = make_ofp_stats_reply(reply->header.xid, reply->type, nbytes);
2670 ofconn_send_reply(ofconn, msg);
2672 return ofpbuf_put_uninit(*msgp, nbytes);
2675 static struct ofpbuf *
2676 make_nxstats_reply(ovs_be32 xid, ovs_be32 subtype, size_t body_len)
2678 struct nicira_stats_msg *nsm;
2681 msg = ofpbuf_new(MIN(sizeof *nsm + body_len, UINT16_MAX));
2682 nsm = put_openflow_xid(sizeof *nsm, OFPT_STATS_REPLY, xid, msg);
2683 nsm->type = htons(OFPST_VENDOR);
2684 nsm->flags = htons(0);
2685 nsm->vendor = htonl(NX_VENDOR_ID);
2686 nsm->subtype = subtype;
2690 static struct ofpbuf *
2691 start_nxstats_reply(const struct nicira_stats_msg *request, size_t body_len)
2693 return make_nxstats_reply(request->header.xid, request->subtype, body_len);
2697 append_nxstats_reply(size_t nbytes, struct ofconn *ofconn,
2698 struct ofpbuf **msgp)
2700 struct ofpbuf *msg = *msgp;
2701 assert(nbytes <= UINT16_MAX - sizeof(struct nicira_stats_msg));
2702 if (nbytes + msg->size > UINT16_MAX) {
2703 struct nicira_stats_msg *reply = msg->data;
2704 reply->flags = htons(OFPSF_REPLY_MORE);
2705 *msgp = make_nxstats_reply(reply->header.xid, reply->subtype, nbytes);
2706 ofconn_send_reply(ofconn, msg);
2708 ofpbuf_prealloc_tailroom(*msgp, nbytes);
2712 handle_desc_stats_request(struct ofconn *ofconn,
2713 const struct ofp_header *request)
2715 struct ofproto *p = ofconn_get_ofproto(ofconn);
2716 struct ofp_desc_stats *ods;
2719 msg = start_ofp_stats_reply(request, sizeof *ods);
2720 ods = append_ofp_stats_reply(sizeof *ods, ofconn, &msg);
2721 memset(ods, 0, sizeof *ods);
2722 ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
2723 ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
2724 ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
2725 ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
2726 ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
2727 ofconn_send_reply(ofconn, msg);
2733 handle_table_stats_request(struct ofconn *ofconn,
2734 const struct ofp_header *request)
2736 struct ofproto *p = ofconn_get_ofproto(ofconn);
2737 struct ofp_table_stats *ots;
2740 msg = start_ofp_stats_reply(request, sizeof *ots * 2);
2742 /* Classifier table. */
2743 ots = append_ofp_stats_reply(sizeof *ots, ofconn, &msg);
2744 memset(ots, 0, sizeof *ots);
2745 strcpy(ots->name, "classifier");
2746 ots->wildcards = (ofconn_get_flow_format(ofconn) == NXFF_OPENFLOW10
2747 ? htonl(OFPFW_ALL) : htonl(OVSFW_ALL));
2748 ots->max_entries = htonl(1024 * 1024); /* An arbitrary big number. */
2749 ots->active_count = htonl(classifier_count(&p->cls));
2750 put_32aligned_be64(&ots->lookup_count, htonll(0)); /* XXX */
2751 put_32aligned_be64(&ots->matched_count, htonll(0)); /* XXX */
2753 ofconn_send_reply(ofconn, msg);
2758 append_port_stat(struct ofport *port, struct ofconn *ofconn,
2759 struct ofpbuf **msgp)
2761 struct netdev_stats stats;
2762 struct ofp_port_stats *ops;
2764 /* Intentionally ignore return value, since errors will set
2765 * 'stats' to all-1s, which is correct for OpenFlow, and
2766 * netdev_get_stats() will log errors. */
2767 netdev_get_stats(port->netdev, &stats);
2769 ops = append_ofp_stats_reply(sizeof *ops, ofconn, msgp);
2770 ops->port_no = htons(port->opp.port_no);
2771 memset(ops->pad, 0, sizeof ops->pad);
2772 put_32aligned_be64(&ops->rx_packets, htonll(stats.rx_packets));
2773 put_32aligned_be64(&ops->tx_packets, htonll(stats.tx_packets));
2774 put_32aligned_be64(&ops->rx_bytes, htonll(stats.rx_bytes));
2775 put_32aligned_be64(&ops->tx_bytes, htonll(stats.tx_bytes));
2776 put_32aligned_be64(&ops->rx_dropped, htonll(stats.rx_dropped));
2777 put_32aligned_be64(&ops->tx_dropped, htonll(stats.tx_dropped));
2778 put_32aligned_be64(&ops->rx_errors, htonll(stats.rx_errors));
2779 put_32aligned_be64(&ops->tx_errors, htonll(stats.tx_errors));
2780 put_32aligned_be64(&ops->rx_frame_err, htonll(stats.rx_frame_errors));
2781 put_32aligned_be64(&ops->rx_over_err, htonll(stats.rx_over_errors));
2782 put_32aligned_be64(&ops->rx_crc_err, htonll(stats.rx_crc_errors));
2783 put_32aligned_be64(&ops->collisions, htonll(stats.collisions));
2787 handle_port_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
2789 struct ofproto *p = ofconn_get_ofproto(ofconn);
2790 const struct ofp_port_stats_request *psr = ofputil_stats_body(oh);
2791 struct ofp_port_stats *ops;
2793 struct ofport *port;
2795 msg = start_ofp_stats_reply(oh, sizeof *ops * 16);
2796 if (psr->port_no != htons(OFPP_NONE)) {
2797 port = get_port(p, ofp_port_to_odp_port(ntohs(psr->port_no)));
2799 append_port_stat(port, ofconn, &msg);
2802 HMAP_FOR_EACH (port, hmap_node, &p->ports) {
2803 append_port_stat(port, ofconn, &msg);
2807 ofconn_send_reply(ofconn, msg);
2812 calc_flow_duration__(long long int start, uint32_t *sec, uint32_t *nsec)
2814 long long int msecs = time_msec() - start;
2815 *sec = msecs / 1000;
2816 *nsec = (msecs % 1000) * (1000 * 1000);
2820 calc_flow_duration(long long int start, ovs_be32 *sec_be, ovs_be32 *nsec_be)
2824 calc_flow_duration__(start, &sec, &nsec);
2825 *sec_be = htonl(sec);
2826 *nsec_be = htonl(nsec);
2830 put_ofp_flow_stats(struct ofconn *ofconn, struct rule *rule,
2831 ovs_be16 out_port, struct ofpbuf **replyp)
2833 struct ofp_flow_stats *ofs;
2834 uint64_t packet_count, byte_count;
2836 size_t act_len, len;
2838 if (rule_is_hidden(rule) || !rule_has_out_port(rule, out_port)) {
2842 act_len = sizeof *rule->actions * rule->n_actions;
2843 len = offsetof(struct ofp_flow_stats, actions) + act_len;
2845 rule_get_stats(rule, &packet_count, &byte_count);
2847 ofs = append_ofp_stats_reply(len, ofconn, replyp);
2848 ofs->length = htons(len);
2851 ofputil_cls_rule_to_match(&rule->cr, ofconn_get_flow_format(ofconn),
2852 &ofs->match, rule->flow_cookie, &cookie);
2853 put_32aligned_be64(&ofs->cookie, cookie);
2854 calc_flow_duration(rule->created, &ofs->duration_sec, &ofs->duration_nsec);
2855 ofs->priority = htons(rule->cr.priority);
2856 ofs->idle_timeout = htons(rule->idle_timeout);
2857 ofs->hard_timeout = htons(rule->hard_timeout);
2858 memset(ofs->pad2, 0, sizeof ofs->pad2);
2859 put_32aligned_be64(&ofs->packet_count, htonll(packet_count));
2860 put_32aligned_be64(&ofs->byte_count, htonll(byte_count));
2861 if (rule->n_actions > 0) {
2862 memcpy(ofs->actions, rule->actions, act_len);
2867 is_valid_table(uint8_t table_id)
2869 if (table_id == 0 || table_id == 0xff) {
2872 /* It would probably be better to reply with an error but there doesn't
2873 * seem to be any appropriate value, so that might just be
2875 VLOG_WARN_RL(&rl, "controller asked for invalid table %"PRIu8,
2882 handle_flow_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
2884 const struct ofp_flow_stats_request *fsr = ofputil_stats_body(oh);
2885 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
2886 struct ofpbuf *reply;
2888 COVERAGE_INC(ofproto_flows_req);
2889 reply = start_ofp_stats_reply(oh, 1024);
2890 if (is_valid_table(fsr->table_id)) {
2891 struct cls_cursor cursor;
2892 struct cls_rule target;
2895 ofputil_cls_rule_from_match(&fsr->match, 0, NXFF_OPENFLOW10, 0,
2897 cls_cursor_init(&cursor, &ofproto->cls, &target);
2898 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
2899 put_ofp_flow_stats(ofconn, rule, fsr->out_port, &reply);
2902 ofconn_send_reply(ofconn, reply);
2908 put_nx_flow_stats(struct ofconn *ofconn, struct rule *rule,
2909 ovs_be16 out_port, struct ofpbuf **replyp)
2911 struct nx_flow_stats *nfs;
2912 uint64_t packet_count, byte_count;
2913 size_t act_len, start_len;
2914 struct ofpbuf *reply;
2916 if (rule_is_hidden(rule) || !rule_has_out_port(rule, out_port)) {
2920 rule_get_stats(rule, &packet_count, &byte_count);
2922 act_len = sizeof *rule->actions * rule->n_actions;
2924 append_nxstats_reply(sizeof *nfs + NXM_MAX_LEN + act_len, ofconn, replyp);
2925 start_len = (*replyp)->size;
2928 nfs = ofpbuf_put_uninit(reply, sizeof *nfs);
2931 calc_flow_duration(rule->created, &nfs->duration_sec, &nfs->duration_nsec);
2932 nfs->cookie = rule->flow_cookie;
2933 nfs->priority = htons(rule->cr.priority);
2934 nfs->idle_timeout = htons(rule->idle_timeout);
2935 nfs->hard_timeout = htons(rule->hard_timeout);
2936 nfs->match_len = htons(nx_put_match(reply, &rule->cr));
2937 memset(nfs->pad2, 0, sizeof nfs->pad2);
2938 nfs->packet_count = htonll(packet_count);
2939 nfs->byte_count = htonll(byte_count);
2940 if (rule->n_actions > 0) {
2941 ofpbuf_put(reply, rule->actions, act_len);
2943 nfs->length = htons(reply->size - start_len);
2947 handle_nxst_flow(struct ofconn *ofconn, const struct ofp_header *oh)
2949 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
2950 struct nx_flow_stats_request *nfsr;
2951 struct cls_rule target;
2952 struct ofpbuf *reply;
2956 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2958 /* Dissect the message. */
2959 nfsr = ofpbuf_pull(&b, sizeof *nfsr);
2960 error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &target);
2965 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
2968 COVERAGE_INC(ofproto_flows_req);
2969 reply = start_nxstats_reply(&nfsr->nsm, 1024);
2970 if (is_valid_table(nfsr->table_id)) {
2971 struct cls_cursor cursor;
2974 cls_cursor_init(&cursor, &ofproto->cls, &target);
2975 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
2976 put_nx_flow_stats(ofconn, rule, nfsr->out_port, &reply);
2979 ofconn_send_reply(ofconn, reply);
2985 flow_stats_ds(struct rule *rule, struct ds *results)
2987 uint64_t packet_count, byte_count;
2988 size_t act_len = sizeof *rule->actions * rule->n_actions;
2990 rule_get_stats(rule, &packet_count, &byte_count);
2992 ds_put_format(results, "duration=%llds, ",
2993 (time_msec() - rule->created) / 1000);
2994 ds_put_format(results, "idle=%.3fs, ", (time_msec() - rule->used) / 1000.0);
2995 ds_put_format(results, "priority=%u, ", rule->cr.priority);
2996 ds_put_format(results, "n_packets=%"PRIu64", ", packet_count);
2997 ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
2998 cls_rule_format(&rule->cr, results);
2999 ds_put_char(results, ',');
3001 ofp_print_actions(results, &rule->actions->header, act_len);
3003 ds_put_cstr(results, "drop");
3005 ds_put_cstr(results, "\n");
3008 /* Adds a pretty-printed description of all flows to 'results', including
3009 * hidden flows (e.g., set up by in-band control). */
3011 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
3013 struct cls_cursor cursor;
3016 cls_cursor_init(&cursor, &p->cls, NULL);
3017 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3018 flow_stats_ds(rule, results);
3023 query_aggregate_stats(struct ofproto *ofproto, struct cls_rule *target,
3024 ovs_be16 out_port, uint8_t table_id,
3025 struct ofp_aggregate_stats_reply *oasr)
3027 uint64_t total_packets = 0;
3028 uint64_t total_bytes = 0;
3031 COVERAGE_INC(ofproto_agg_request);
3033 if (is_valid_table(table_id)) {
3034 struct cls_cursor cursor;
3037 cls_cursor_init(&cursor, &ofproto->cls, target);
3038 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3039 if (!rule_is_hidden(rule) && rule_has_out_port(rule, out_port)) {
3040 uint64_t packet_count;
3041 uint64_t byte_count;
3043 rule_get_stats(rule, &packet_count, &byte_count);
3045 total_packets += packet_count;
3046 total_bytes += byte_count;
3052 oasr->flow_count = htonl(n_flows);
3053 put_32aligned_be64(&oasr->packet_count, htonll(total_packets));
3054 put_32aligned_be64(&oasr->byte_count, htonll(total_bytes));
3055 memset(oasr->pad, 0, sizeof oasr->pad);
3059 handle_aggregate_stats_request(struct ofconn *ofconn,
3060 const struct ofp_header *oh)
3062 const struct ofp_aggregate_stats_request *request = ofputil_stats_body(oh);
3063 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3064 struct ofp_aggregate_stats_reply *reply;
3065 struct cls_rule target;
3068 ofputil_cls_rule_from_match(&request->match, 0, NXFF_OPENFLOW10, 0,
3071 msg = start_ofp_stats_reply(oh, sizeof *reply);
3072 reply = append_ofp_stats_reply(sizeof *reply, ofconn, &msg);
3073 query_aggregate_stats(ofproto, &target, request->out_port,
3074 request->table_id, reply);
3075 ofconn_send_reply(ofconn, msg);
3080 handle_nxst_aggregate(struct ofconn *ofconn, const struct ofp_header *oh)
3082 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3083 struct nx_aggregate_stats_request *request;
3084 struct ofp_aggregate_stats_reply *reply;
3085 struct cls_rule target;
3090 ofpbuf_use_const(&b, oh, ntohs(oh->length));
3092 /* Dissect the message. */
3093 request = ofpbuf_pull(&b, sizeof *request);
3094 error = nx_pull_match(&b, ntohs(request->match_len), 0, &target);
3099 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3103 COVERAGE_INC(ofproto_flows_req);
3104 buf = start_nxstats_reply(&request->nsm, sizeof *reply);
3105 reply = ofpbuf_put_uninit(buf, sizeof *reply);
3106 query_aggregate_stats(ofproto, &target, request->out_port,
3107 request->table_id, reply);
3108 ofconn_send_reply(ofconn, buf);
3113 struct queue_stats_cbdata {
3114 struct ofconn *ofconn;
3115 struct ofport *ofport;
3120 put_queue_stats(struct queue_stats_cbdata *cbdata, uint32_t queue_id,
3121 const struct netdev_queue_stats *stats)
3123 struct ofp_queue_stats *reply;
3125 reply = append_ofp_stats_reply(sizeof *reply, cbdata->ofconn, &cbdata->msg);
3126 reply->port_no = htons(cbdata->ofport->opp.port_no);
3127 memset(reply->pad, 0, sizeof reply->pad);
3128 reply->queue_id = htonl(queue_id);
3129 put_32aligned_be64(&reply->tx_bytes, htonll(stats->tx_bytes));
3130 put_32aligned_be64(&reply->tx_packets, htonll(stats->tx_packets));
3131 put_32aligned_be64(&reply->tx_errors, htonll(stats->tx_errors));
3135 handle_queue_stats_dump_cb(uint32_t queue_id,
3136 struct netdev_queue_stats *stats,
3139 struct queue_stats_cbdata *cbdata = cbdata_;
3141 put_queue_stats(cbdata, queue_id, stats);
3145 handle_queue_stats_for_port(struct ofport *port, uint32_t queue_id,
3146 struct queue_stats_cbdata *cbdata)
3148 cbdata->ofport = port;
3149 if (queue_id == OFPQ_ALL) {
3150 netdev_dump_queue_stats(port->netdev,
3151 handle_queue_stats_dump_cb, cbdata);
3153 struct netdev_queue_stats stats;
3155 if (!netdev_get_queue_stats(port->netdev, queue_id, &stats)) {
3156 put_queue_stats(cbdata, queue_id, &stats);
3162 handle_queue_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
3164 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3165 const struct ofp_queue_stats_request *qsr;
3166 struct queue_stats_cbdata cbdata;
3167 struct ofport *port;
3168 unsigned int port_no;
3171 qsr = ofputil_stats_body(oh);
3173 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3176 COVERAGE_INC(ofproto_queue_req);
3178 cbdata.ofconn = ofconn;
3179 cbdata.msg = start_ofp_stats_reply(oh, 128);
3181 port_no = ntohs(qsr->port_no);
3182 queue_id = ntohl(qsr->queue_id);
3183 if (port_no == OFPP_ALL) {
3184 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
3185 handle_queue_stats_for_port(port, queue_id, &cbdata);
3187 } else if (port_no < ofproto->max_ports) {
3188 port = get_port(ofproto, ofp_port_to_odp_port(port_no));
3190 handle_queue_stats_for_port(port, queue_id, &cbdata);
3193 ofpbuf_delete(cbdata.msg);
3194 return ofp_mkerr(OFPET_QUEUE_OP_FAILED, OFPQOFC_BAD_PORT);
3196 ofconn_send_reply(ofconn, cbdata.msg);
3201 /* Updates 'facet''s used time. Caller is responsible for calling
3202 * facet_push_stats() to update the flows which 'facet' resubmits into. */
3204 facet_update_time(struct ofproto *ofproto, struct facet *facet,
3207 if (used > facet->used) {
3209 if (used > facet->rule->used) {
3210 facet->rule->used = used;
3212 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, used);
3216 /* Folds the statistics from 'stats' into the counters in 'facet'.
3218 * Because of the meaning of a facet's counters, it only makes sense to do this
3219 * if 'stats' are not tracked in the datapath, that is, if 'stats' represents a
3220 * packet that was sent by hand or if it represents statistics that have been
3221 * cleared out of the datapath. */
3223 facet_update_stats(struct ofproto *ofproto, struct facet *facet,
3224 const struct dpif_flow_stats *stats)
3226 if (stats->n_packets || stats->used > facet->used) {
3227 facet_update_time(ofproto, facet, stats->used);
3228 facet->packet_count += stats->n_packets;
3229 facet->byte_count += stats->n_bytes;
3230 facet_push_stats(ofproto, facet);
3231 netflow_flow_update_flags(&facet->nf_flow, stats->tcp_flags);
3236 facet_push_stats(struct ofproto *ofproto, struct facet *facet)
3238 uint64_t rs_packets, rs_bytes;
3240 assert(facet->packet_count >= facet->rs_packet_count);
3241 assert(facet->byte_count >= facet->rs_byte_count);
3242 assert(facet->used >= facet->rs_used);
3244 rs_packets = facet->packet_count - facet->rs_packet_count;
3245 rs_bytes = facet->byte_count - facet->rs_byte_count;
3247 if (rs_packets || rs_bytes || facet->used > facet->rs_used) {
3248 facet->rs_packet_count = facet->packet_count;
3249 facet->rs_byte_count = facet->byte_count;
3250 facet->rs_used = facet->used;
3252 flow_push_stats(ofproto, facet->rule, &facet->flow,
3253 rs_packets, rs_bytes, facet->used);
3257 struct ofproto_push {
3258 struct action_xlate_ctx ctx;
3265 push_resubmit(struct action_xlate_ctx *ctx, struct rule *rule)
3267 struct ofproto_push *push = CONTAINER_OF(ctx, struct ofproto_push, ctx);
3270 rule->packet_count += push->packets;
3271 rule->byte_count += push->bytes;
3272 rule->used = MAX(push->used, rule->used);
3276 /* Pushes flow statistics to the rules which 'flow' resubmits into given
3277 * 'rule''s actions. */
3279 flow_push_stats(struct ofproto *ofproto, const struct rule *rule,
3280 struct flow *flow, uint64_t packets, uint64_t bytes,
3283 struct ofproto_push push;
3285 push.packets = packets;
3289 action_xlate_ctx_init(&push.ctx, ofproto, flow, NULL);
3290 push.ctx.resubmit_hook = push_resubmit;
3291 ofpbuf_delete(xlate_actions(&push.ctx, rule->actions, rule->n_actions));
3294 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
3295 * in which no matching flow already exists in the flow table.
3297 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
3298 * ofp_actions, to the ofproto's flow table. Returns 0 on success or an
3299 * OpenFlow error code as encoded by ofp_mkerr() on failure.
3301 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3304 add_flow(struct ofconn *ofconn, struct flow_mod *fm)
3306 struct ofproto *p = ofconn_get_ofproto(ofconn);
3307 struct ofpbuf *packet;
3312 if (fm->flags & OFPFF_CHECK_OVERLAP
3313 && classifier_rule_overlaps(&p->cls, &fm->cr)) {
3314 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP);
3318 if (fm->buffer_id != UINT32_MAX) {
3319 error = ofconn_pktbuf_retrieve(ofconn, fm->buffer_id,
3323 in_port = UINT16_MAX;
3326 rule = rule_create(&fm->cr, fm->actions, fm->n_actions,
3327 fm->idle_timeout, fm->hard_timeout, fm->cookie,
3328 fm->flags & OFPFF_SEND_FLOW_REM);
3329 rule_insert(p, rule);
3331 rule_execute(p, rule, in_port, packet);
3336 static struct rule *
3337 find_flow_strict(struct ofproto *p, const struct flow_mod *fm)
3339 return rule_from_cls_rule(classifier_find_rule_exactly(&p->cls, &fm->cr));
3343 send_buffered_packet(struct ofconn *ofconn,
3344 struct rule *rule, uint32_t buffer_id)
3346 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3347 struct ofpbuf *packet;
3351 if (buffer_id == UINT32_MAX) {
3355 error = ofconn_pktbuf_retrieve(ofconn, buffer_id, &packet, &in_port);
3360 rule_execute(ofproto, rule, in_port, packet);
3365 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
3367 struct modify_flows_cbdata {
3368 struct ofproto *ofproto;
3369 const struct flow_mod *fm;
3373 static int modify_flow(struct ofproto *, const struct flow_mod *,
3376 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
3377 * encoded by ofp_mkerr() on failure.
3379 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3382 modify_flows_loose(struct ofconn *ofconn, struct flow_mod *fm)
3384 struct ofproto *p = ofconn_get_ofproto(ofconn);
3385 struct rule *match = NULL;
3386 struct cls_cursor cursor;
3389 cls_cursor_init(&cursor, &p->cls, &fm->cr);
3390 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3391 if (!rule_is_hidden(rule)) {
3393 modify_flow(p, fm, rule);
3398 /* This credits the packet to whichever flow happened to match last.
3399 * That's weird. Maybe we should do a lookup for the flow that
3400 * actually matches the packet? Who knows. */
3401 send_buffered_packet(ofconn, match, fm->buffer_id);
3404 return add_flow(ofconn, fm);
3408 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
3409 * code as encoded by ofp_mkerr() on failure.
3411 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3414 modify_flow_strict(struct ofconn *ofconn, struct flow_mod *fm)
3416 struct ofproto *p = ofconn_get_ofproto(ofconn);
3417 struct rule *rule = find_flow_strict(p, fm);
3418 if (rule && !rule_is_hidden(rule)) {
3419 modify_flow(p, fm, rule);
3420 return send_buffered_packet(ofconn, rule, fm->buffer_id);
3422 return add_flow(ofconn, fm);
3426 /* Implements core of OFPFC_MODIFY and OFPFC_MODIFY_STRICT where 'rule' has
3427 * been identified as a flow in 'p''s flow table to be modified, by changing
3428 * the rule's actions to match those in 'ofm' (which is followed by 'n_actions'
3429 * ofp_action[] structures). */
3431 modify_flow(struct ofproto *p, const struct flow_mod *fm, struct rule *rule)
3433 size_t actions_len = fm->n_actions * sizeof *rule->actions;
3435 rule->flow_cookie = fm->cookie;
3437 /* If the actions are the same, do nothing. */
3438 if (fm->n_actions == rule->n_actions
3440 || !memcmp(fm->actions, rule->actions, actions_len))) {
3444 /* Replace actions. */
3445 free(rule->actions);
3446 rule->actions = fm->n_actions ? xmemdup(fm->actions, actions_len) : NULL;
3447 rule->n_actions = fm->n_actions;
3449 p->need_revalidate = true;
3454 /* OFPFC_DELETE implementation. */
3456 static void delete_flow(struct ofproto *, struct rule *, ovs_be16 out_port);
3458 /* Implements OFPFC_DELETE. */
3460 delete_flows_loose(struct ofproto *p, const struct flow_mod *fm)
3462 struct rule *rule, *next_rule;
3463 struct cls_cursor cursor;
3465 cls_cursor_init(&cursor, &p->cls, &fm->cr);
3466 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
3467 delete_flow(p, rule, htons(fm->out_port));
3471 /* Implements OFPFC_DELETE_STRICT. */
3473 delete_flow_strict(struct ofproto *p, struct flow_mod *fm)
3475 struct rule *rule = find_flow_strict(p, fm);
3477 delete_flow(p, rule, htons(fm->out_port));
3481 /* Implements core of OFPFC_DELETE and OFPFC_DELETE_STRICT where 'rule' has
3482 * been identified as a flow to delete from 'p''s flow table, by deleting the
3483 * flow and sending out a OFPT_FLOW_REMOVED message to any interested
3486 * Will not delete 'rule' if it is hidden. Will delete 'rule' only if
3487 * 'out_port' is htons(OFPP_NONE) or if 'rule' actually outputs to the
3488 * specified 'out_port'. */
3490 delete_flow(struct ofproto *p, struct rule *rule, ovs_be16 out_port)
3492 if (rule_is_hidden(rule)) {
3496 if (out_port != htons(OFPP_NONE) && !rule_has_out_port(rule, out_port)) {
3500 rule_send_removed(p, rule, OFPRR_DELETE);
3501 rule_remove(p, rule);
3505 handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh)
3507 struct ofproto *p = ofconn_get_ofproto(ofconn);
3511 error = reject_slave_controller(ofconn, "flow_mod");
3516 error = ofputil_decode_flow_mod(&fm, oh, ofconn_get_flow_format(ofconn));
3521 /* We do not support the emergency flow cache. It will hopefully get
3522 * dropped from OpenFlow in the near future. */
3523 if (fm.flags & OFPFF_EMERG) {
3524 /* There isn't a good fit for an error code, so just state that the
3525 * flow table is full. */
3526 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
3529 error = validate_actions(fm.actions, fm.n_actions,
3530 &fm.cr.flow, p->max_ports);
3535 switch (fm.command) {
3537 return add_flow(ofconn, &fm);
3540 return modify_flows_loose(ofconn, &fm);
3542 case OFPFC_MODIFY_STRICT:
3543 return modify_flow_strict(ofconn, &fm);
3546 delete_flows_loose(p, &fm);
3549 case OFPFC_DELETE_STRICT:
3550 delete_flow_strict(p, &fm);
3554 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND);
3559 handle_tun_id_from_cookie(struct ofconn *ofconn, const struct ofp_header *oh)
3561 const struct nxt_tun_id_cookie *msg
3562 = (const struct nxt_tun_id_cookie *) oh;
3563 enum nx_flow_format flow_format;
3565 flow_format = msg->set ? NXFF_TUN_ID_FROM_COOKIE : NXFF_OPENFLOW10;
3566 ofconn_set_flow_format(ofconn, flow_format);
3572 handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh)
3574 struct nx_role_request *nrr = (struct nx_role_request *) oh;
3575 struct nx_role_request *reply;
3579 if (ofconn_get_type(ofconn) != OFCONN_PRIMARY) {
3580 VLOG_WARN_RL(&rl, "ignoring role request on service connection");
3581 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
3584 role = ntohl(nrr->role);
3585 if (role != NX_ROLE_OTHER && role != NX_ROLE_MASTER
3586 && role != NX_ROLE_SLAVE) {
3587 VLOG_WARN_RL(&rl, "received request for unknown role %"PRIu32, role);
3589 /* There's no good error code for this. */
3590 return ofp_mkerr(OFPET_BAD_REQUEST, -1);
3593 ofconn_set_role(ofconn, role);
3595 reply = make_nxmsg_xid(sizeof *reply, NXT_ROLE_REPLY, oh->xid, &buf);
3596 reply->role = htonl(role);
3597 ofconn_send_reply(ofconn, buf);
3603 handle_nxt_set_flow_format(struct ofconn *ofconn, const struct ofp_header *oh)
3605 const struct nxt_set_flow_format *msg
3606 = (const struct nxt_set_flow_format *) oh;
3609 format = ntohl(msg->format);
3610 if (format == NXFF_OPENFLOW10
3611 || format == NXFF_TUN_ID_FROM_COOKIE
3612 || format == NXFF_NXM) {
3613 ofconn_set_flow_format(ofconn, format);
3616 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
3621 handle_barrier_request(struct ofconn *ofconn, const struct ofp_header *oh)
3623 struct ofp_header *ob;
3626 /* Currently, everything executes synchronously, so we can just
3627 * immediately send the barrier reply. */
3628 ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
3629 ofconn_send_reply(ofconn, buf);
3634 handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
3636 const struct ofp_header *oh = msg->data;
3637 const struct ofputil_msg_type *type;
3640 error = ofputil_decode_msg_type(oh, &type);
3645 switch (ofputil_msg_type_code(type)) {
3646 /* OpenFlow requests. */
3647 case OFPUTIL_OFPT_ECHO_REQUEST:
3648 return handle_echo_request(ofconn, oh);
3650 case OFPUTIL_OFPT_FEATURES_REQUEST:
3651 return handle_features_request(ofconn, oh);
3653 case OFPUTIL_OFPT_GET_CONFIG_REQUEST:
3654 return handle_get_config_request(ofconn, oh);
3656 case OFPUTIL_OFPT_SET_CONFIG:
3657 return handle_set_config(ofconn, msg->data);
3659 case OFPUTIL_OFPT_PACKET_OUT:
3660 return handle_packet_out(ofconn, oh);
3662 case OFPUTIL_OFPT_PORT_MOD:
3663 return handle_port_mod(ofconn, oh);
3665 case OFPUTIL_OFPT_FLOW_MOD:
3666 return handle_flow_mod(ofconn, oh);
3668 case OFPUTIL_OFPT_BARRIER_REQUEST:
3669 return handle_barrier_request(ofconn, oh);
3671 /* OpenFlow replies. */
3672 case OFPUTIL_OFPT_ECHO_REPLY:
3675 /* Nicira extension requests. */
3676 case OFPUTIL_NXT_TUN_ID_FROM_COOKIE:
3677 return handle_tun_id_from_cookie(ofconn, oh);
3679 case OFPUTIL_NXT_ROLE_REQUEST:
3680 return handle_role_request(ofconn, oh);
3682 case OFPUTIL_NXT_SET_FLOW_FORMAT:
3683 return handle_nxt_set_flow_format(ofconn, oh);
3685 case OFPUTIL_NXT_FLOW_MOD:
3686 return handle_flow_mod(ofconn, oh);
3688 /* OpenFlow statistics requests. */
3689 case OFPUTIL_OFPST_DESC_REQUEST:
3690 return handle_desc_stats_request(ofconn, oh);
3692 case OFPUTIL_OFPST_FLOW_REQUEST:
3693 return handle_flow_stats_request(ofconn, oh);
3695 case OFPUTIL_OFPST_AGGREGATE_REQUEST:
3696 return handle_aggregate_stats_request(ofconn, oh);
3698 case OFPUTIL_OFPST_TABLE_REQUEST:
3699 return handle_table_stats_request(ofconn, oh);
3701 case OFPUTIL_OFPST_PORT_REQUEST:
3702 return handle_port_stats_request(ofconn, oh);
3704 case OFPUTIL_OFPST_QUEUE_REQUEST:
3705 return handle_queue_stats_request(ofconn, oh);
3707 /* Nicira extension statistics requests. */
3708 case OFPUTIL_NXST_FLOW_REQUEST:
3709 return handle_nxst_flow(ofconn, oh);
3711 case OFPUTIL_NXST_AGGREGATE_REQUEST:
3712 return handle_nxst_aggregate(ofconn, oh);
3714 case OFPUTIL_INVALID:
3715 case OFPUTIL_OFPT_HELLO:
3716 case OFPUTIL_OFPT_ERROR:
3717 case OFPUTIL_OFPT_FEATURES_REPLY:
3718 case OFPUTIL_OFPT_GET_CONFIG_REPLY:
3719 case OFPUTIL_OFPT_PACKET_IN:
3720 case OFPUTIL_OFPT_FLOW_REMOVED:
3721 case OFPUTIL_OFPT_PORT_STATUS:
3722 case OFPUTIL_OFPT_BARRIER_REPLY:
3723 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REQUEST:
3724 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REPLY:
3725 case OFPUTIL_OFPST_DESC_REPLY:
3726 case OFPUTIL_OFPST_FLOW_REPLY:
3727 case OFPUTIL_OFPST_QUEUE_REPLY:
3728 case OFPUTIL_OFPST_PORT_REPLY:
3729 case OFPUTIL_OFPST_TABLE_REPLY:
3730 case OFPUTIL_OFPST_AGGREGATE_REPLY:
3731 case OFPUTIL_NXT_ROLE_REPLY:
3732 case OFPUTIL_NXT_FLOW_REMOVED:
3733 case OFPUTIL_NXST_FLOW_REPLY:
3734 case OFPUTIL_NXST_AGGREGATE_REPLY:
3736 if (VLOG_IS_WARN_ENABLED()) {
3737 char *s = ofp_to_string(oh, ntohs(oh->length), 2);
3738 VLOG_DBG_RL(&rl, "OpenFlow message ignored: %s", s);
3741 if (oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY) {
3742 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT);
3744 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
3750 handle_openflow(struct ofconn *ofconn, struct ofpbuf *ofp_msg)
3752 int error = handle_openflow__(ofconn, ofp_msg);
3754 send_error_oh(ofconn, ofp_msg->data, error);
3756 COVERAGE_INC(ofproto_recv_openflow);
3760 handle_miss_upcall(struct ofproto *p, struct dpif_upcall *upcall)
3762 struct facet *facet;
3765 /* Obtain in_port and tun_id, at least. */
3766 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
3768 /* Set header pointers in 'flow'. */
3769 flow_extract(upcall->packet, flow.tun_id, flow.in_port, &flow);
3771 if (cfm_should_process_flow(&flow)) {
3772 ofproto_process_cfm(p, &flow, upcall->packet);
3773 ofpbuf_delete(upcall->packet);
3775 } else if (p->ofhooks->special_cb
3776 && !p->ofhooks->special_cb(&flow, upcall->packet, p->aux)) {
3777 ofpbuf_delete(upcall->packet);
3781 /* Check with in-band control to see if this packet should be sent
3782 * to the local port regardless of the flow table. */
3783 if (connmgr_msg_in_hook(p->connmgr, &flow, upcall->packet)) {
3784 ofproto_send_packet(p, ODPP_LOCAL, 0, upcall->packet);
3787 facet = facet_lookup_valid(p, &flow);
3789 struct rule *rule = rule_lookup(p, &flow);
3791 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
3792 struct ofport *port = get_port(p, flow.in_port);
3794 if (port->opp.config & OFPPC_NO_PACKET_IN) {
3795 COVERAGE_INC(ofproto_no_packet_in);
3796 /* XXX install 'drop' flow entry */
3797 ofpbuf_delete(upcall->packet);
3801 VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16,
3805 COVERAGE_INC(ofproto_packet_in);
3806 send_packet_in(p, upcall, &flow, false);
3810 facet = facet_create(p, rule, &flow, upcall->packet);
3811 } else if (!facet->may_install) {
3812 /* The facet is not installable, that is, we need to process every
3813 * packet, so process the current packet's actions into 'facet'. */
3814 facet_make_actions(p, facet, upcall->packet);
3817 if (facet->rule->cr.priority == FAIL_OPEN_PRIORITY) {
3819 * Extra-special case for fail-open mode.
3821 * We are in fail-open mode and the packet matched the fail-open rule,
3822 * but we are connected to a controller too. We should send the packet
3823 * up to the controller in the hope that it will try to set up a flow
3824 * and thereby allow us to exit fail-open.
3826 * See the top-level comment in fail-open.c for more information.
3828 send_packet_in(p, upcall, &flow, true);
3831 facet_execute(p, facet, upcall->packet);
3832 facet_install(p, facet, false);
3836 handle_upcall(struct ofproto *p, struct dpif_upcall *upcall)
3840 switch (upcall->type) {
3841 case DPIF_UC_ACTION:
3842 COVERAGE_INC(ofproto_ctlr_action);
3843 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
3844 send_packet_in(p, upcall, &flow, false);
3847 case DPIF_UC_SAMPLE:
3849 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
3850 ofproto_sflow_received(p->sflow, upcall, &flow);
3852 ofpbuf_delete(upcall->packet);
3856 handle_miss_upcall(p, upcall);
3859 case DPIF_N_UC_TYPES:
3861 VLOG_WARN_RL(&rl, "upcall has unexpected type %"PRIu32, upcall->type);
3866 /* Flow expiration. */
3868 static int ofproto_dp_max_idle(const struct ofproto *);
3869 static void ofproto_update_stats(struct ofproto *);
3870 static void rule_expire(struct ofproto *, struct rule *);
3871 static void ofproto_expire_facets(struct ofproto *, int dp_max_idle);
3873 /* This function is called periodically by ofproto_run(). Its job is to
3874 * collect updates for the flows that have been installed into the datapath,
3875 * most importantly when they last were used, and then use that information to
3876 * expire flows that have not been used recently.
3878 * Returns the number of milliseconds after which it should be called again. */
3880 ofproto_expire(struct ofproto *ofproto)
3882 struct rule *rule, *next_rule;
3883 struct cls_cursor cursor;
3886 /* Update stats for each flow in the datapath. */
3887 ofproto_update_stats(ofproto);
3889 /* Expire facets that have been idle too long. */
3890 dp_max_idle = ofproto_dp_max_idle(ofproto);
3891 ofproto_expire_facets(ofproto, dp_max_idle);
3893 /* Expire OpenFlow flows whose idle_timeout or hard_timeout has passed. */
3894 cls_cursor_init(&cursor, &ofproto->cls, NULL);
3895 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
3896 rule_expire(ofproto, rule);
3899 /* Let the hook know that we're at a stable point: all outstanding data
3900 * in existing flows has been accounted to the account_cb. Thus, the
3901 * hook can now reasonably do operations that depend on having accurate
3902 * flow volume accounting (currently, that's just bond rebalancing). */
3903 if (ofproto->ofhooks->account_checkpoint_cb) {
3904 ofproto->ofhooks->account_checkpoint_cb(ofproto->aux);
3907 return MIN(dp_max_idle, 1000);
3910 /* Update 'packet_count', 'byte_count', and 'used' members of installed facets.
3912 * This function also pushes statistics updates to rules which each facet
3913 * resubmits into. Generally these statistics will be accurate. However, if a
3914 * facet changes the rule it resubmits into at some time in between
3915 * ofproto_update_stats() runs, it is possible that statistics accrued to the
3916 * old rule will be incorrectly attributed to the new rule. This could be
3917 * avoided by calling ofproto_update_stats() whenever rules are created or
3918 * deleted. However, the performance impact of making so many calls to the
3919 * datapath do not justify the benefit of having perfectly accurate statistics.
3922 ofproto_update_stats(struct ofproto *p)
3924 const struct dpif_flow_stats *stats;
3925 struct dpif_flow_dump dump;
3926 const struct nlattr *key;
3929 dpif_flow_dump_start(&dump, p->dpif);
3930 while (dpif_flow_dump_next(&dump, &key, &key_len, NULL, NULL, &stats)) {
3931 struct facet *facet;
3934 if (odp_flow_key_to_flow(key, key_len, &flow)) {
3938 odp_flow_key_format(key, key_len, &s);
3939 VLOG_WARN_RL(&rl, "failed to convert ODP flow key to flow: %s",
3945 facet = facet_find(p, &flow);
3947 if (facet && facet->installed) {
3949 if (stats->n_packets >= facet->dp_packet_count) {
3950 facet->packet_count += stats->n_packets - facet->dp_packet_count;
3952 VLOG_WARN_RL(&rl, "unexpected packet count from the datapath");
3955 if (stats->n_bytes >= facet->dp_byte_count) {
3956 facet->byte_count += stats->n_bytes - facet->dp_byte_count;
3958 VLOG_WARN_RL(&rl, "unexpected byte count from datapath");
3961 facet->dp_packet_count = stats->n_packets;
3962 facet->dp_byte_count = stats->n_bytes;
3964 facet_update_time(p, facet, stats->used);
3965 facet_account(p, facet, stats->n_bytes);
3966 facet_push_stats(p, facet);
3968 /* There's a flow in the datapath that we know nothing about.
3970 COVERAGE_INC(ofproto_unexpected_rule);
3971 dpif_flow_del(p->dpif, key, key_len, NULL);
3974 dpif_flow_dump_done(&dump);
3977 /* Calculates and returns the number of milliseconds of idle time after which
3978 * facets should expire from the datapath and we should fold their statistics
3979 * into their parent rules in userspace. */
3981 ofproto_dp_max_idle(const struct ofproto *ofproto)
3984 * Idle time histogram.
3986 * Most of the time a switch has a relatively small number of facets. When
3987 * this is the case we might as well keep statistics for all of them in
3988 * userspace and to cache them in the kernel datapath for performance as
3991 * As the number of facets increases, the memory required to maintain
3992 * statistics about them in userspace and in the kernel becomes
3993 * significant. However, with a large number of facets it is likely that
3994 * only a few of them are "heavy hitters" that consume a large amount of
3995 * bandwidth. At this point, only heavy hitters are worth caching in the
3996 * kernel and maintaining in userspaces; other facets we can discard.
3998 * The technique used to compute the idle time is to build a histogram with
3999 * N_BUCKETS buckets whose width is BUCKET_WIDTH msecs each. Each facet
4000 * that is installed in the kernel gets dropped in the appropriate bucket.
4001 * After the histogram has been built, we compute the cutoff so that only
4002 * the most-recently-used 1% of facets (but at least 1000 flows) are kept
4003 * cached. At least the most-recently-used bucket of facets is kept, so
4004 * actually an arbitrary number of facets can be kept in any given
4005 * expiration run (though the next run will delete most of those unless
4006 * they receive additional data).
4008 * This requires a second pass through the facets, in addition to the pass
4009 * made by ofproto_update_stats(), because the former function never looks
4010 * at uninstallable facets.
4012 enum { BUCKET_WIDTH = ROUND_UP(100, TIME_UPDATE_INTERVAL) };
4013 enum { N_BUCKETS = 5000 / BUCKET_WIDTH };
4014 int buckets[N_BUCKETS] = { 0 };
4015 struct facet *facet;
4020 total = hmap_count(&ofproto->facets);
4021 if (total <= 1000) {
4022 return N_BUCKETS * BUCKET_WIDTH;
4025 /* Build histogram. */
4027 HMAP_FOR_EACH (facet, hmap_node, &ofproto->facets) {
4028 long long int idle = now - facet->used;
4029 int bucket = (idle <= 0 ? 0
4030 : idle >= BUCKET_WIDTH * N_BUCKETS ? N_BUCKETS - 1
4031 : (unsigned int) idle / BUCKET_WIDTH);
4035 /* Find the first bucket whose flows should be expired. */
4036 for (bucket = 0; bucket < N_BUCKETS; bucket++) {
4037 if (buckets[bucket]) {
4040 subtotal += buckets[bucket++];
4041 } while (bucket < N_BUCKETS && subtotal < MAX(1000, total / 100));
4046 if (VLOG_IS_DBG_ENABLED()) {
4050 ds_put_cstr(&s, "keep");
4051 for (i = 0; i < N_BUCKETS; i++) {
4053 ds_put_cstr(&s, ", drop");
4056 ds_put_format(&s, " %d:%d", i * BUCKET_WIDTH, buckets[i]);
4059 VLOG_INFO("%s: %s (msec:count)",
4060 dpif_name(ofproto->dpif), ds_cstr(&s));
4064 return bucket * BUCKET_WIDTH;
4068 facet_active_timeout(struct ofproto *ofproto, struct facet *facet)
4070 if (ofproto->netflow && !facet_is_controller_flow(facet) &&
4071 netflow_active_timeout_expired(ofproto->netflow, &facet->nf_flow)) {
4072 struct ofexpired expired;
4074 if (facet->installed) {
4075 struct dpif_flow_stats stats;
4077 facet_put__(ofproto, facet, facet->actions, facet->actions_len,
4079 facet_update_stats(ofproto, facet, &stats);
4082 expired.flow = facet->flow;
4083 expired.packet_count = facet->packet_count;
4084 expired.byte_count = facet->byte_count;
4085 expired.used = facet->used;
4086 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
4091 ofproto_expire_facets(struct ofproto *ofproto, int dp_max_idle)
4093 long long int cutoff = time_msec() - dp_max_idle;
4094 struct facet *facet, *next_facet;
4096 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
4097 facet_active_timeout(ofproto, facet);
4098 if (facet->used < cutoff) {
4099 facet_remove(ofproto, facet);
4104 /* If 'rule' is an OpenFlow rule, that has expired according to OpenFlow rules,
4105 * then delete it entirely. */
4107 rule_expire(struct ofproto *ofproto, struct rule *rule)
4109 struct facet *facet, *next_facet;
4113 /* Has 'rule' expired? */
4115 if (rule->hard_timeout
4116 && now > rule->created + rule->hard_timeout * 1000) {
4117 reason = OFPRR_HARD_TIMEOUT;
4118 } else if (rule->idle_timeout && list_is_empty(&rule->facets)
4119 && now >rule->used + rule->idle_timeout * 1000) {
4120 reason = OFPRR_IDLE_TIMEOUT;
4125 COVERAGE_INC(ofproto_expired);
4127 /* Update stats. (This is a no-op if the rule expired due to an idle
4128 * timeout, because that only happens when the rule has no facets left.) */
4129 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
4130 facet_remove(ofproto, facet);
4133 /* Get rid of the rule. */
4134 if (!rule_is_hidden(rule)) {
4135 rule_send_removed(ofproto, rule, reason);
4137 rule_remove(ofproto, rule);
4141 rule_send_removed(struct ofproto *p, struct rule *rule, uint8_t reason)
4143 struct ofputil_flow_removed fr;
4145 if (!rule->send_flow_removed) {
4150 fr.cookie = rule->flow_cookie;
4152 calc_flow_duration__(rule->created, &fr.duration_sec, &fr.duration_nsec);
4153 fr.idle_timeout = rule->idle_timeout;
4154 fr.packet_count = rule->packet_count;
4155 fr.byte_count = rule->byte_count;
4157 connmgr_send_flow_removed(p->connmgr, &fr);
4160 /* Obtains statistics for 'rule' and stores them in '*packets' and '*bytes'.
4161 * The returned statistics include statistics for all of 'rule''s facets. */
4163 rule_get_stats(const struct rule *rule, uint64_t *packets, uint64_t *bytes)
4166 struct facet *facet;
4168 /* Start from historical data for 'rule' itself that are no longer tracked
4169 * in facets. This counts, for example, facets that have expired. */
4170 p = rule->packet_count;
4171 b = rule->byte_count;
4173 /* Add any statistics that are tracked by facets. This includes
4174 * statistical data recently updated by ofproto_update_stats() as well as
4175 * stats for packets that were executed "by hand" via dpif_execute(). */
4176 LIST_FOR_EACH (facet, list_node, &rule->facets) {
4177 p += facet->packet_count;
4178 b += facet->byte_count;
4185 /* Given 'upcall', of type DPIF_UC_ACTION or DPIF_UC_MISS, sends an
4186 * OFPT_PACKET_IN message to each OpenFlow controller as necessary according to
4187 * their individual configurations.
4189 * If 'clone' is true, the caller retains ownership of 'upcall->packet'.
4190 * Otherwise, ownership is transferred to this function. */
4192 send_packet_in(struct ofproto *ofproto, struct dpif_upcall *upcall,
4193 const struct flow *flow, bool clone)
4195 struct ofputil_packet_in pin;
4197 pin.packet = upcall->packet;
4198 pin.in_port = odp_port_to_ofp_port(flow->in_port);
4199 pin.reason = upcall->type == DPIF_UC_MISS ? OFPR_NO_MATCH : OFPR_ACTION;
4200 pin.buffer_id = 0; /* not yet known */
4201 pin.send_len = upcall->userdata;
4202 connmgr_send_packet_in(ofproto->connmgr, upcall, flow,
4203 clone ? NULL : upcall->packet);
4207 pick_datapath_id(const struct ofproto *ofproto)
4209 const struct ofport *port;
4211 port = get_port(ofproto, ODPP_LOCAL);
4213 uint8_t ea[ETH_ADDR_LEN];
4216 error = netdev_get_etheraddr(port->netdev, ea);
4218 return eth_addr_to_uint64(ea);
4220 VLOG_WARN("could not get MAC address for %s (%s)",
4221 netdev_get_name(port->netdev), strerror(error));
4223 return ofproto->fallback_dpid;
4227 pick_fallback_dpid(void)
4229 uint8_t ea[ETH_ADDR_LEN];
4230 eth_addr_nicira_random(ea);
4231 return eth_addr_to_uint64(ea);
4235 ofproto_unixctl_list(struct unixctl_conn *conn, const char *arg OVS_UNUSED,
4236 void *aux OVS_UNUSED)
4238 const struct shash_node *node;
4242 SHASH_FOR_EACH (node, &all_ofprotos) {
4243 ds_put_format(&results, "%s\n", node->name);
4245 unixctl_command_reply(conn, 200, ds_cstr(&results));
4246 ds_destroy(&results);
4249 struct ofproto_trace {
4250 struct action_xlate_ctx ctx;
4256 trace_format_rule(struct ds *result, int level, const struct rule *rule)
4258 ds_put_char_multiple(result, '\t', level);
4260 ds_put_cstr(result, "No match\n");
4264 ds_put_format(result, "Rule: cookie=%#"PRIx64" ",
4265 ntohll(rule->flow_cookie));
4266 cls_rule_format(&rule->cr, result);
4267 ds_put_char(result, '\n');
4269 ds_put_char_multiple(result, '\t', level);
4270 ds_put_cstr(result, "OpenFlow ");
4271 ofp_print_actions(result, (const struct ofp_action_header *) rule->actions,
4272 rule->n_actions * sizeof *rule->actions);
4273 ds_put_char(result, '\n');
4277 trace_format_flow(struct ds *result, int level, const char *title,
4278 struct ofproto_trace *trace)
4280 ds_put_char_multiple(result, '\t', level);
4281 ds_put_format(result, "%s: ", title);
4282 if (flow_equal(&trace->ctx.flow, &trace->flow)) {
4283 ds_put_cstr(result, "unchanged");
4285 flow_format(result, &trace->ctx.flow);
4286 trace->flow = trace->ctx.flow;
4288 ds_put_char(result, '\n');
4292 trace_resubmit(struct action_xlate_ctx *ctx, struct rule *rule)
4294 struct ofproto_trace *trace = CONTAINER_OF(ctx, struct ofproto_trace, ctx);
4295 struct ds *result = trace->result;
4297 ds_put_char(result, '\n');
4298 trace_format_flow(result, ctx->recurse + 1, "Resubmitted flow", trace);
4299 trace_format_rule(result, ctx->recurse + 1, rule);
4303 ofproto_unixctl_trace(struct unixctl_conn *conn, const char *args_,
4304 void *aux OVS_UNUSED)
4306 char *dpname, *in_port_s, *tun_id_s, *packet_s;
4307 char *args = xstrdup(args_);
4308 char *save_ptr = NULL;
4309 struct ofproto *ofproto;
4310 struct ofpbuf packet;
4318 ofpbuf_init(&packet, strlen(args) / 2);
4321 dpname = strtok_r(args, " ", &save_ptr);
4322 tun_id_s = strtok_r(NULL, " ", &save_ptr);
4323 in_port_s = strtok_r(NULL, " ", &save_ptr);
4324 packet_s = strtok_r(NULL, "", &save_ptr); /* Get entire rest of line. */
4325 if (!dpname || !in_port_s || !packet_s) {
4326 unixctl_command_reply(conn, 501, "Bad command syntax");
4330 ofproto = shash_find_data(&all_ofprotos, dpname);
4332 unixctl_command_reply(conn, 501, "Unknown ofproto (use ofproto/list "
4337 tun_id = htonll(strtoull(tun_id_s, NULL, 0));
4338 in_port = ofp_port_to_odp_port(atoi(in_port_s));
4340 packet_s = ofpbuf_put_hex(&packet, packet_s, NULL);
4341 packet_s += strspn(packet_s, " ");
4342 if (*packet_s != '\0') {
4343 unixctl_command_reply(conn, 501, "Trailing garbage in command");
4346 if (packet.size < ETH_HEADER_LEN) {
4347 unixctl_command_reply(conn, 501, "Packet data too short for Ethernet");
4351 ds_put_cstr(&result, "Packet: ");
4352 s = ofp_packet_to_string(packet.data, packet.size, packet.size);
4353 ds_put_cstr(&result, s);
4356 flow_extract(&packet, tun_id, in_port, &flow);
4357 ds_put_cstr(&result, "Flow: ");
4358 flow_format(&result, &flow);
4359 ds_put_char(&result, '\n');
4361 rule = rule_lookup(ofproto, &flow);
4362 trace_format_rule(&result, 0, rule);
4364 struct ofproto_trace trace;
4365 struct ofpbuf *odp_actions;
4367 trace.result = &result;
4369 action_xlate_ctx_init(&trace.ctx, ofproto, &flow, &packet);
4370 trace.ctx.resubmit_hook = trace_resubmit;
4371 odp_actions = xlate_actions(&trace.ctx,
4372 rule->actions, rule->n_actions);
4374 ds_put_char(&result, '\n');
4375 trace_format_flow(&result, 0, "Final flow", &trace);
4376 ds_put_cstr(&result, "Datapath actions: ");
4377 format_odp_actions(&result, odp_actions->data, odp_actions->size);
4378 ofpbuf_delete(odp_actions);
4381 unixctl_command_reply(conn, 200, ds_cstr(&result));
4384 ds_destroy(&result);
4385 ofpbuf_uninit(&packet);
4390 ofproto_unixctl_init(void)
4392 static bool registered;
4398 unixctl_command_register("ofproto/list", ofproto_unixctl_list, NULL);
4399 unixctl_command_register("ofproto/trace", ofproto_unixctl_trace, NULL);
4403 default_normal_ofhook_cb(const struct flow *flow, const struct ofpbuf *packet,
4404 struct ofpbuf *odp_actions, tag_type *tags,
4405 uint16_t *nf_output_iface, void *ofproto_)
4407 struct ofproto *ofproto = ofproto_;
4408 struct mac_entry *dst_mac;
4410 /* Drop frames for reserved multicast addresses. */
4411 if (eth_addr_is_reserved(flow->dl_dst)) {
4415 /* Learn source MAC (but don't try to learn from revalidation). */
4417 && mac_learning_may_learn(ofproto->ml, flow->dl_src, 0)) {
4418 struct mac_entry *src_mac;
4420 src_mac = mac_learning_insert(ofproto->ml, flow->dl_src, 0);
4421 if (mac_entry_is_new(src_mac) || src_mac->port.i != flow->in_port) {
4422 /* The log messages here could actually be useful in debugging,
4423 * so keep the rate limit relatively high. */
4424 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
4425 VLOG_DBG_RL(&rl, "learned that "ETH_ADDR_FMT" is on port %"PRIu16,
4426 ETH_ADDR_ARGS(flow->dl_src), flow->in_port);
4428 ofproto_revalidate(ofproto,
4429 mac_learning_changed(ofproto->ml, src_mac));
4430 src_mac->port.i = flow->in_port;
4434 /* Determine output port. */
4435 dst_mac = mac_learning_lookup(ofproto->ml, flow->dl_dst, 0, tags);
4437 flood_packets(ofproto, flow->in_port, OFPPC_NO_FLOOD,
4438 nf_output_iface, odp_actions);
4440 int out_port = dst_mac->port.i;
4441 if (out_port != flow->in_port) {
4442 nl_msg_put_u32(odp_actions, ODP_ACTION_ATTR_OUTPUT, out_port);
4443 *nf_output_iface = out_port;
4452 static const struct ofhooks default_ofhooks = {
4453 default_normal_ofhook_cb,