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_reset_dp_stats(struct facet *, struct dpif_flow_stats *);
272 static void facet_update_stats(struct ofproto *, struct facet *,
273 const struct dpif_flow_stats *);
274 static void facet_push_stats(struct ofproto *, struct facet *);
276 static void send_packet_in(struct ofproto *, struct dpif_upcall *,
277 const struct flow *, bool clone);
281 uint64_t datapath_id; /* Datapath ID. */
282 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
283 char *mfr_desc; /* Manufacturer. */
284 char *hw_desc; /* Hardware. */
285 char *sw_desc; /* Software version. */
286 char *serial_desc; /* Serial number. */
287 char *dp_desc; /* Datapath description. */
291 struct netdev_monitor *netdev_monitor;
292 struct hmap ports; /* Contains "struct ofport"s. */
293 struct shash port_by_name;
297 struct netflow *netflow;
298 struct ofproto_sflow *sflow;
301 struct classifier cls;
302 struct timer next_expiration;
306 bool need_revalidate;
307 struct tag_set revalidate_set;
309 /* OpenFlow connections. */
310 struct connmgr *connmgr;
312 /* Hooks for ovs-vswitchd. */
313 const struct ofhooks *ofhooks;
316 /* Used by default ofhooks. */
317 struct mac_learning *ml;
320 /* Map from dpif name to struct ofproto, for use by unixctl commands. */
321 static struct shash all_ofprotos = SHASH_INITIALIZER(&all_ofprotos);
323 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
325 static const struct ofhooks default_ofhooks;
327 static uint64_t pick_datapath_id(const struct ofproto *);
328 static uint64_t pick_fallback_dpid(void);
330 static void ofproto_flush_flows__(struct ofproto *);
331 static int ofproto_expire(struct ofproto *);
332 static void flow_push_stats(struct ofproto *, const struct rule *,
333 struct flow *, uint64_t packets, uint64_t bytes,
336 static void handle_upcall(struct ofproto *, struct dpif_upcall *);
338 static void handle_openflow(struct ofconn *, struct ofpbuf *);
340 static struct ofport *get_port(const struct ofproto *, uint16_t odp_port);
341 static void update_port(struct ofproto *, const char *devname);
342 static int init_ports(struct ofproto *);
343 static void reinit_ports(struct ofproto *);
345 static void ofproto_unixctl_init(void);
348 ofproto_create(const char *datapath, const char *datapath_type,
349 const struct ofhooks *ofhooks, void *aux,
350 struct ofproto **ofprotop)
352 char local_name[IF_NAMESIZE];
359 ofproto_unixctl_init();
361 /* Connect to datapath and start listening for messages. */
362 error = dpif_open(datapath, datapath_type, &dpif);
364 VLOG_ERR("failed to open datapath %s: %s", datapath, strerror(error));
367 error = dpif_recv_set_mask(dpif,
368 ((1u << DPIF_UC_MISS) |
369 (1u << DPIF_UC_ACTION) |
370 (1u << DPIF_UC_SAMPLE)));
372 VLOG_ERR("failed to listen on datapath %s: %s",
373 datapath, strerror(error));
377 dpif_flow_flush(dpif);
378 dpif_recv_purge(dpif);
380 error = dpif_port_get_name(dpif, ODPP_LOCAL,
381 local_name, sizeof local_name);
383 VLOG_ERR("%s: cannot get name of datapath local port (%s)",
384 datapath, strerror(error));
388 /* Initialize settings. */
389 p = xzalloc(sizeof *p);
390 p->fallback_dpid = pick_fallback_dpid();
391 p->datapath_id = p->fallback_dpid;
392 p->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
393 p->hw_desc = xstrdup(DEFAULT_HW_DESC);
394 p->sw_desc = xstrdup(DEFAULT_SW_DESC);
395 p->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
396 p->dp_desc = xstrdup(DEFAULT_DP_DESC);
398 /* Initialize datapath. */
400 p->netdev_monitor = netdev_monitor_create();
401 hmap_init(&p->ports);
402 shash_init(&p->port_by_name);
403 p->max_ports = dpif_get_max_ports(dpif);
405 /* Initialize submodules. */
409 /* Initialize flow table. */
410 classifier_init(&p->cls);
411 timer_set_duration(&p->next_expiration, 1000);
413 /* Initialize facet table. */
414 hmap_init(&p->facets);
415 p->need_revalidate = false;
416 tag_set_init(&p->revalidate_set);
418 /* Initialize hooks. */
420 p->ofhooks = ofhooks;
424 p->ofhooks = &default_ofhooks;
426 p->ml = mac_learning_create();
429 /* Pick final datapath ID. */
430 p->datapath_id = pick_datapath_id(p);
431 VLOG_INFO("using datapath ID %016"PRIx64, p->datapath_id);
433 shash_add_once(&all_ofprotos, dpif_name(p->dpif), p);
435 /* Initialize OpenFlow connections. */
436 p->connmgr = connmgr_create(p, datapath, local_name);
443 ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id)
445 uint64_t old_dpid = p->datapath_id;
446 p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p);
447 if (p->datapath_id != old_dpid) {
448 VLOG_INFO("datapath ID changed to %016"PRIx64, p->datapath_id);
450 /* Force all active connections to reconnect, since there is no way to
451 * notify a controller that the datapath ID has changed. */
452 ofproto_reconnect_controllers(p);
457 ofproto_set_controllers(struct ofproto *p,
458 const struct ofproto_controller *controllers,
459 size_t n_controllers)
461 connmgr_set_controllers(p->connmgr, controllers, n_controllers);
465 ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode)
467 connmgr_set_fail_mode(p->connmgr, fail_mode);
470 /* Drops the connections between 'ofproto' and all of its controllers, forcing
471 * them to reconnect. */
473 ofproto_reconnect_controllers(struct ofproto *ofproto)
475 connmgr_reconnect(ofproto->connmgr);
478 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s
479 * in-band control should guarantee access, in the same way that in-band
480 * control guarantees access to OpenFlow controllers. */
482 ofproto_set_extra_in_band_remotes(struct ofproto *ofproto,
483 const struct sockaddr_in *extras, size_t n)
485 connmgr_set_extra_in_band_remotes(ofproto->connmgr, extras, n);
488 /* Sets the OpenFlow queue used by flows set up by in-band control on
489 * 'ofproto' to 'queue_id'. If 'queue_id' is negative, then in-band control
490 * flows will use the default queue. */
492 ofproto_set_in_band_queue(struct ofproto *ofproto, int queue_id)
494 connmgr_set_in_band_queue(ofproto->connmgr, queue_id);
498 ofproto_set_desc(struct ofproto *p,
499 const char *mfr_desc, const char *hw_desc,
500 const char *sw_desc, const char *serial_desc,
503 struct ofp_desc_stats *ods;
506 if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
507 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
508 sizeof ods->mfr_desc);
511 p->mfr_desc = xstrdup(mfr_desc);
514 if (strlen(hw_desc) >= sizeof ods->hw_desc) {
515 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
516 sizeof ods->hw_desc);
519 p->hw_desc = xstrdup(hw_desc);
522 if (strlen(sw_desc) >= sizeof ods->sw_desc) {
523 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
524 sizeof ods->sw_desc);
527 p->sw_desc = xstrdup(sw_desc);
530 if (strlen(serial_desc) >= sizeof ods->serial_num) {
531 VLOG_WARN("truncating serial_desc, must be less than %zu "
533 sizeof ods->serial_num);
535 free(p->serial_desc);
536 p->serial_desc = xstrdup(serial_desc);
539 if (strlen(dp_desc) >= sizeof ods->dp_desc) {
540 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
541 sizeof ods->dp_desc);
544 p->dp_desc = xstrdup(dp_desc);
549 ofproto_set_snoops(struct ofproto *ofproto, const struct sset *snoops)
551 return connmgr_set_snoops(ofproto->connmgr, snoops);
555 ofproto_set_netflow(struct ofproto *ofproto,
556 const struct netflow_options *nf_options)
558 if (nf_options && !sset_is_empty(&nf_options->collectors)) {
559 if (!ofproto->netflow) {
560 ofproto->netflow = netflow_create();
562 return netflow_set_options(ofproto->netflow, nf_options);
564 netflow_destroy(ofproto->netflow);
565 ofproto->netflow = NULL;
571 ofproto_set_sflow(struct ofproto *ofproto,
572 const struct ofproto_sflow_options *oso)
574 struct ofproto_sflow *os = ofproto->sflow;
577 struct ofport *ofport;
579 os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
580 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
581 ofproto_sflow_add_port(os, ofport->odp_port,
582 netdev_get_name(ofport->netdev));
585 ofproto_sflow_set_options(os, oso);
587 ofproto_sflow_destroy(os);
588 ofproto->sflow = NULL;
592 /* Connectivity Fault Management configuration. */
594 /* Clears the CFM configuration from 'port_no' on 'ofproto'. */
596 ofproto_iface_clear_cfm(struct ofproto *ofproto, uint32_t port_no)
598 struct ofport *ofport = get_port(ofproto, port_no);
599 if (ofport && ofport->cfm){
600 cfm_destroy(ofport->cfm);
605 /* Configures connectivity fault management on 'port_no' in 'ofproto'. Takes
606 * basic configuration from the configuration members in 'cfm', and the set of
607 * remote maintenance points from the 'n_remote_mps' elements in 'remote_mps'.
608 * Ignores the statistics members of 'cfm'.
610 * This function has no effect if 'ofproto' does not have a port 'port_no'. */
612 ofproto_iface_set_cfm(struct ofproto *ofproto, uint32_t port_no,
613 const struct cfm *cfm,
614 const uint16_t *remote_mps, size_t n_remote_mps)
616 struct ofport *ofport;
618 ofport = get_port(ofproto, port_no);
620 VLOG_WARN("%s: cannot configure CFM on nonexistent port %"PRIu32,
621 dpif_name(ofproto->dpif), port_no);
626 ofport->cfm = cfm_create();
629 ofport->cfm->mpid = cfm->mpid;
630 ofport->cfm->interval = cfm->interval;
631 memcpy(ofport->cfm->maid, cfm->maid, CCM_MAID_LEN);
633 cfm_update_remote_mps(ofport->cfm, remote_mps, n_remote_mps);
635 if (!cfm_configure(ofport->cfm)) {
636 VLOG_WARN("%s: CFM configuration on port %"PRIu32" (%s) failed",
637 dpif_name(ofproto->dpif), port_no,
638 netdev_get_name(ofport->netdev));
639 cfm_destroy(ofport->cfm);
644 /* Returns the connectivity fault management object associated with 'port_no'
645 * within 'ofproto', or a null pointer if 'ofproto' does not have a port
646 * 'port_no' or if that port does not have CFM configured. The caller must not
647 * modify or destroy the returned object. */
649 ofproto_iface_get_cfm(struct ofproto *ofproto, uint32_t port_no)
651 struct ofport *ofport = get_port(ofproto, port_no);
652 return ofport ? ofport->cfm : NULL;
656 ofproto_get_datapath_id(const struct ofproto *ofproto)
658 return ofproto->datapath_id;
662 ofproto_has_primary_controller(const struct ofproto *ofproto)
664 return connmgr_has_controllers(ofproto->connmgr);
667 enum ofproto_fail_mode
668 ofproto_get_fail_mode(const struct ofproto *p)
670 return connmgr_get_fail_mode(p->connmgr);
674 ofproto_has_snoops(const struct ofproto *ofproto)
676 return connmgr_has_snoops(ofproto->connmgr);
680 ofproto_get_snoops(const struct ofproto *ofproto, struct sset *snoops)
682 connmgr_get_snoops(ofproto->connmgr, snoops);
686 ofproto_destroy(struct ofproto *p)
688 struct ofport *ofport, *next_ofport;
694 shash_find_and_delete(&all_ofprotos, dpif_name(p->dpif));
696 ofproto_flush_flows__(p);
697 connmgr_destroy(p->connmgr);
698 classifier_destroy(&p->cls);
699 hmap_destroy(&p->facets);
702 netdev_monitor_destroy(p->netdev_monitor);
703 HMAP_FOR_EACH_SAFE (ofport, next_ofport, hmap_node, &p->ports) {
704 hmap_remove(&p->ports, &ofport->hmap_node);
707 shash_destroy(&p->port_by_name);
709 netflow_destroy(p->netflow);
710 ofproto_sflow_destroy(p->sflow);
712 mac_learning_destroy(p->ml);
717 free(p->serial_desc);
720 hmap_destroy(&p->ports);
726 ofproto_run(struct ofproto *p)
728 int error = ofproto_run1(p);
730 error = ofproto_run2(p, false);
736 process_port_change(struct ofproto *ofproto, int error, char *devname)
738 if (error == ENOBUFS) {
739 reinit_ports(ofproto);
741 update_port(ofproto, devname);
747 ofproto_run1(struct ofproto *p)
749 struct ofport *ofport;
754 if (shash_is_empty(&p->port_by_name)) {
758 for (i = 0; i < 50; i++) {
759 struct dpif_upcall packet;
761 error = dpif_recv(p->dpif, &packet);
763 if (error == ENODEV) {
764 /* Someone destroyed the datapath behind our back. The caller
765 * better destroy us and give up, because we're just going to
766 * spin from here on out. */
767 static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5);
768 VLOG_ERR_RL(&rl2, "%s: datapath was destroyed externally",
775 handle_upcall(p, &packet);
778 while ((error = dpif_port_poll(p->dpif, &devname)) != EAGAIN) {
779 process_port_change(p, error, devname);
781 while ((error = netdev_monitor_poll(p->netdev_monitor,
782 &devname)) != EAGAIN) {
783 process_port_change(p, error, devname);
786 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
787 ofport_run(p, ofport);
790 connmgr_run(p->connmgr, handle_openflow);
792 if (timer_expired(&p->next_expiration)) {
793 int delay = ofproto_expire(p);
794 timer_set_duration(&p->next_expiration, delay);
795 COVERAGE_INC(ofproto_expiration);
799 netflow_run(p->netflow);
802 ofproto_sflow_run(p->sflow);
809 ofproto_run2(struct ofproto *p, bool revalidate_all)
811 /* Figure out what we need to revalidate now, if anything. */
812 struct tag_set revalidate_set = p->revalidate_set;
813 if (p->need_revalidate) {
814 revalidate_all = true;
817 /* Clear the revalidation flags. */
818 tag_set_init(&p->revalidate_set);
819 p->need_revalidate = false;
821 /* Now revalidate if there's anything to do. */
822 if (revalidate_all || !tag_set_is_empty(&revalidate_set)) {
823 struct facet *facet, *next;
825 HMAP_FOR_EACH_SAFE (facet, next, hmap_node, &p->facets) {
827 || tag_set_intersects(&revalidate_set, facet->tags)) {
828 facet_revalidate(p, facet);
837 ofproto_wait(struct ofproto *p)
839 struct ofport *ofport;
841 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
844 dpif_recv_wait(p->dpif);
845 dpif_port_poll_wait(p->dpif);
846 netdev_monitor_poll_wait(p->netdev_monitor);
848 ofproto_sflow_wait(p->sflow);
850 if (!tag_set_is_empty(&p->revalidate_set)) {
851 poll_immediate_wake();
853 if (p->need_revalidate) {
854 /* Shouldn't happen, but if it does just go around again. */
855 VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
856 poll_immediate_wake();
858 timer_wait(&p->next_expiration);
860 connmgr_wait(p->connmgr);
864 ofproto_revalidate(struct ofproto *ofproto, tag_type tag)
866 tag_set_add(&ofproto->revalidate_set, tag);
870 ofproto_get_revalidate_set(struct ofproto *ofproto)
872 return &ofproto->revalidate_set;
876 ofproto_is_alive(const struct ofproto *p)
878 return connmgr_has_controllers(p->connmgr);
882 ofproto_get_ofproto_controller_info(const struct ofproto *ofproto,
885 connmgr_get_controller_info(ofproto->connmgr, info);
889 ofproto_free_ofproto_controller_info(struct shash *info)
891 struct shash_node *node;
893 SHASH_FOR_EACH (node, info) {
894 struct ofproto_controller_info *cinfo = node->data;
895 while (cinfo->pairs.n) {
896 free((char *) cinfo->pairs.values[--cinfo->pairs.n]);
903 /* Deletes port number 'odp_port' from the datapath for 'ofproto'.
905 * This is almost the same as calling dpif_port_del() directly on the
906 * datapath, but it also makes 'ofproto' close its open netdev for the port
907 * (if any). This makes it possible to create a new netdev of a different
908 * type under the same name, which otherwise the netdev library would refuse
909 * to do because of the conflict. (The netdev would eventually get closed on
910 * the next trip through ofproto_run(), but this interface is more direct.)
912 * Returns 0 if successful, otherwise a positive errno. */
914 ofproto_port_del(struct ofproto *ofproto, uint16_t odp_port)
916 struct ofport *ofport = get_port(ofproto, odp_port);
917 const char *name = ofport ? netdev_get_name(ofport->netdev) : "<unknown>";
920 error = dpif_port_del(ofproto->dpif, odp_port);
922 VLOG_ERR("%s: failed to remove port %"PRIu16" (%s) interface (%s)",
923 dpif_name(ofproto->dpif), odp_port, name, strerror(error));
925 /* 'name' is the netdev's name and update_port() is going to close the
926 * netdev. Just in case update_port() refers to 'name' after it
927 * destroys 'ofport', make a copy of it around the update_port()
929 char *devname = xstrdup(name);
930 update_port(ofproto, devname);
936 /* Checks if 'ofproto' thinks 'odp_port' should be included in floods. Returns
937 * true if 'odp_port' exists and should be included, false otherwise. */
939 ofproto_port_is_floodable(struct ofproto *ofproto, uint16_t odp_port)
941 struct ofport *ofport = get_port(ofproto, odp_port);
942 return ofport && !(ofport->opp.config & OFPPC_NO_FLOOD);
945 /* Sends 'packet' out of port 'port_no' within 'p'. If 'vlan_tci' is zero the
946 * packet will not have any 802.1Q hader; if it is nonzero, then the packet
947 * will be sent with the VLAN TCI specified by 'vlan_tci & ~VLAN_CFI'.
949 * Returns 0 if successful, otherwise a positive errno value. */
951 ofproto_send_packet(struct ofproto *ofproto,
952 uint32_t port_no, uint16_t vlan_tci,
953 const struct ofpbuf *packet)
955 struct ofpbuf odp_actions;
958 ofpbuf_init(&odp_actions, 32);
960 nl_msg_put_u32(&odp_actions, ODP_ACTION_ATTR_SET_DL_TCI,
961 ntohs(vlan_tci & ~VLAN_CFI));
963 nl_msg_put_u32(&odp_actions, ODP_ACTION_ATTR_OUTPUT, port_no);
964 error = dpif_execute(ofproto->dpif, odp_actions.data, odp_actions.size,
966 ofpbuf_uninit(&odp_actions);
969 VLOG_WARN_RL(&rl, "%s: failed to send packet on port %"PRIu32" (%s)",
970 dpif_name(ofproto->dpif), port_no, strerror(error));
975 /* Adds a flow to the OpenFlow flow table in 'p' that matches 'cls_rule' and
976 * performs the 'n_actions' actions in 'actions'. The new flow will not
979 * If cls_rule->priority is in the range of priorities supported by OpenFlow
980 * (0...65535, inclusive) then the flow will be visible to OpenFlow
981 * controllers; otherwise, it will be hidden.
983 * The caller retains ownership of 'cls_rule' and 'actions'. */
985 ofproto_add_flow(struct ofproto *p, const struct cls_rule *cls_rule,
986 const union ofp_action *actions, size_t n_actions)
989 rule = rule_create(cls_rule, actions, n_actions, 0, 0, 0, false);
990 rule_insert(p, rule);
994 ofproto_delete_flow(struct ofproto *ofproto, const struct cls_rule *target)
998 rule = rule_from_cls_rule(classifier_find_rule_exactly(&ofproto->cls,
1001 rule_remove(ofproto, rule);
1006 ofproto_flush_flows__(struct ofproto *ofproto)
1008 struct facet *facet, *next_facet;
1009 struct rule *rule, *next_rule;
1010 struct cls_cursor cursor;
1012 COVERAGE_INC(ofproto_flush);
1014 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
1015 /* Mark the facet as not installed so that facet_remove() doesn't
1016 * bother trying to uninstall it. There is no point in uninstalling it
1017 * individually since we are about to blow away all the facets with
1018 * dpif_flow_flush(). */
1019 facet->installed = false;
1020 facet->dp_packet_count = 0;
1021 facet->dp_byte_count = 0;
1022 facet_remove(ofproto, facet);
1025 cls_cursor_init(&cursor, &ofproto->cls, NULL);
1026 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
1027 rule_remove(ofproto, rule);
1030 dpif_flow_flush(ofproto->dpif);
1034 ofproto_flush_flows(struct ofproto *ofproto)
1036 ofproto_flush_flows__(ofproto);
1037 connmgr_flushed(ofproto->connmgr);
1041 reinit_ports(struct ofproto *p)
1043 struct dpif_port_dump dump;
1044 struct sset devnames;
1045 struct ofport *ofport;
1046 struct dpif_port dpif_port;
1047 const char *devname;
1049 COVERAGE_INC(ofproto_reinit_ports);
1051 sset_init(&devnames);
1052 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
1053 sset_add(&devnames, netdev_get_name(ofport->netdev));
1055 DPIF_PORT_FOR_EACH (&dpif_port, &dump, p->dpif) {
1056 sset_add(&devnames, dpif_port.name);
1059 SSET_FOR_EACH (devname, &devnames) {
1060 update_port(p, devname);
1062 sset_destroy(&devnames);
1065 /* Opens and returns a netdev for 'dpif_port', or a null pointer if the netdev
1066 * cannot be opened. On success, also fills in 'opp', in *HOST* byte order. */
1067 static struct netdev *
1068 ofport_open(const struct dpif_port *dpif_port, struct ofp_phy_port *opp)
1070 struct netdev_options netdev_options;
1071 enum netdev_flags flags;
1072 struct netdev *netdev;
1075 memset(&netdev_options, 0, sizeof netdev_options);
1076 netdev_options.name = dpif_port->name;
1077 netdev_options.type = dpif_port->type;
1078 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
1080 error = netdev_open(&netdev_options, &netdev);
1082 VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
1083 "cannot be opened (%s)",
1084 dpif_port->name, dpif_port->port_no,
1085 dpif_port->name, strerror(error));
1089 netdev_get_flags(netdev, &flags);
1091 opp->port_no = odp_port_to_ofp_port(dpif_port->port_no);
1092 netdev_get_etheraddr(netdev, opp->hw_addr);
1093 ovs_strzcpy(opp->name, dpif_port->name, sizeof opp->name);
1094 opp->config = flags & NETDEV_UP ? 0 : OFPPC_PORT_DOWN;
1095 opp->state = netdev_get_carrier(netdev) ? 0 : OFPPS_LINK_DOWN;
1096 netdev_get_features(netdev, &opp->curr, &opp->advertised,
1097 &opp->supported, &opp->peer);
1102 ofport_conflicts(const struct ofproto *p, const struct dpif_port *dpif_port)
1104 if (get_port(p, dpif_port->port_no)) {
1105 VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
1106 dpif_port->port_no);
1108 } else if (shash_find(&p->port_by_name, dpif_port->name)) {
1109 VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
1117 /* Returns true if most fields of 'a' and 'b' are equal. Differences in name,
1118 * port number, and 'config' bits other than OFPPC_PORT_DOWN are
1121 ofport_equal(const struct ofp_phy_port *a, const struct ofp_phy_port *b)
1123 BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
1124 return (!memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
1125 && a->state == b->state
1126 && !((a->config ^ b->config) & OFPPC_PORT_DOWN)
1127 && a->curr == b->curr
1128 && a->advertised == b->advertised
1129 && a->supported == b->supported
1130 && a->peer == b->peer);
1133 /* Adds an ofport to 'p' initialized based on the given 'netdev' and 'opp'.
1134 * The caller must ensure that 'p' does not have a conflicting ofport (that is,
1135 * one with the same name or port number). */
1137 ofport_install(struct ofproto *p,
1138 struct netdev *netdev, const struct ofp_phy_port *opp)
1140 const char *netdev_name = netdev_get_name(netdev);
1141 struct ofport *ofport;
1143 connmgr_send_port_status(p->connmgr, opp, OFPPR_ADD);
1145 /* Create ofport. */
1146 ofport = xmalloc(sizeof *ofport);
1147 ofport->netdev = netdev;
1149 ofport->odp_port = ofp_port_to_odp_port(opp->port_no);
1152 /* Add port to 'p'. */
1153 netdev_monitor_add(p->netdev_monitor, ofport->netdev);
1154 hmap_insert(&p->ports, &ofport->hmap_node, hash_int(ofport->odp_port, 0));
1155 shash_add(&p->port_by_name, netdev_name, ofport);
1157 ofproto_sflow_add_port(p->sflow, ofport->odp_port, netdev_name);
1161 /* Removes 'ofport' from 'p' and destroys it. */
1163 ofport_remove(struct ofproto *p, struct ofport *ofport)
1165 connmgr_send_port_status(p->connmgr, &ofport->opp, OFPPR_DELETE);
1167 netdev_monitor_remove(p->netdev_monitor, ofport->netdev);
1168 hmap_remove(&p->ports, &ofport->hmap_node);
1169 shash_delete(&p->port_by_name,
1170 shash_find(&p->port_by_name,
1171 netdev_get_name(ofport->netdev)));
1173 ofproto_sflow_del_port(p->sflow, ofport->odp_port);
1176 ofport_free(ofport);
1179 /* If 'ofproto' contains an ofport named 'name', removes it from 'ofproto' and
1182 ofport_remove_with_name(struct ofproto *ofproto, const char *name)
1184 struct ofport *port = shash_find_data(&ofproto->port_by_name, name);
1186 ofport_remove(ofproto, port);
1190 /* Updates 'port' within 'ofproto' with the new 'netdev' and 'opp'.
1192 * Does not handle a name or port number change. The caller must implement
1193 * such a change as a delete followed by an add. */
1195 ofport_modified(struct ofproto *ofproto, struct ofport *port,
1196 struct netdev *netdev, struct ofp_phy_port *opp)
1198 memcpy(port->opp.hw_addr, opp->hw_addr, ETH_ADDR_LEN);
1199 port->opp.config = ((port->opp.config & ~OFPPC_PORT_DOWN)
1200 | (opp->config & OFPPC_PORT_DOWN));
1201 port->opp.state = opp->state;
1202 port->opp.curr = opp->curr;
1203 port->opp.advertised = opp->advertised;
1204 port->opp.supported = opp->supported;
1205 port->opp.peer = opp->peer;
1207 netdev_monitor_remove(ofproto->netdev_monitor, port->netdev);
1208 netdev_monitor_add(ofproto->netdev_monitor, netdev);
1210 netdev_close(port->netdev);
1211 port->netdev = netdev;
1213 connmgr_send_port_status(ofproto->connmgr, &port->opp, OFPPR_MODIFY);
1217 ofport_run(struct ofproto *ofproto, struct ofport *ofport)
1220 cfm_run(ofport->cfm);
1222 if (cfm_should_send_ccm(ofport->cfm)) {
1223 struct ofpbuf packet;
1226 ofpbuf_init(&packet, 0);
1227 ccm = eth_compose(&packet, eth_addr_ccm, ofport->opp.hw_addr,
1228 ETH_TYPE_CFM, sizeof *ccm);
1229 cfm_compose_ccm(ofport->cfm, ccm);
1230 ofproto_send_packet(ofproto, ofport->odp_port, 0, &packet);
1231 ofpbuf_uninit(&packet);
1237 ofport_wait(struct ofport *ofport)
1240 cfm_wait(ofport->cfm);
1245 ofport_free(struct ofport *ofport)
1248 cfm_destroy(ofport->cfm);
1249 netdev_close(ofport->netdev);
1254 static struct ofport *
1255 get_port(const struct ofproto *ofproto, uint16_t odp_port)
1257 struct ofport *port;
1259 HMAP_FOR_EACH_IN_BUCKET (port, hmap_node,
1260 hash_int(odp_port, 0), &ofproto->ports) {
1261 if (port->odp_port == odp_port) {
1269 update_port(struct ofproto *ofproto, const char *name)
1271 struct dpif_port dpif_port;
1272 struct ofp_phy_port opp;
1273 struct netdev *netdev;
1274 struct ofport *port;
1276 COVERAGE_INC(ofproto_update_port);
1278 /* Fetch 'name''s location and properties from the datapath. */
1279 netdev = (!dpif_port_query_by_name(ofproto->dpif, name, &dpif_port)
1280 ? ofport_open(&dpif_port, &opp)
1283 port = get_port(ofproto, dpif_port.port_no);
1284 if (port && !strcmp(netdev_get_name(port->netdev), name)) {
1285 /* 'name' hasn't changed location. Any properties changed? */
1286 if (!ofport_equal(&port->opp, &opp)) {
1287 ofport_modified(ofproto, port, netdev, &opp);
1289 netdev_close(netdev);
1292 /* If 'port' is nonnull then its name differs from 'name' and thus
1293 * we should delete it. If we think there's a port named 'name'
1294 * then its port number must be wrong now so delete it too. */
1296 ofport_remove(ofproto, port);
1298 ofport_remove_with_name(ofproto, name);
1299 ofport_install(ofproto, netdev, &opp);
1302 /* Any port named 'name' is gone now. */
1303 ofport_remove_with_name(ofproto, name);
1305 dpif_port_destroy(&dpif_port);
1309 init_ports(struct ofproto *p)
1311 struct dpif_port_dump dump;
1312 struct dpif_port dpif_port;
1314 DPIF_PORT_FOR_EACH (&dpif_port, &dump, p->dpif) {
1315 if (!ofport_conflicts(p, &dpif_port)) {
1316 struct ofp_phy_port opp;
1317 struct netdev *netdev;
1319 netdev = ofport_open(&dpif_port, &opp);
1321 ofport_install(p, netdev, &opp);
1329 /* Returns true if 'rule' should be hidden from the controller.
1331 * Rules with priority higher than UINT16_MAX are set up by ofproto itself
1332 * (e.g. by in-band control) and are intentionally hidden from the
1335 rule_is_hidden(const struct rule *rule)
1337 return rule->cr.priority > UINT16_MAX;
1340 /* Creates and returns a new rule initialized as specified.
1342 * The caller is responsible for inserting the rule into the classifier (with
1343 * rule_insert()). */
1344 static struct rule *
1345 rule_create(const struct cls_rule *cls_rule,
1346 const union ofp_action *actions, size_t n_actions,
1347 uint16_t idle_timeout, uint16_t hard_timeout,
1348 ovs_be64 flow_cookie, bool send_flow_removed)
1350 struct rule *rule = xzalloc(sizeof *rule);
1351 rule->cr = *cls_rule;
1352 rule->idle_timeout = idle_timeout;
1353 rule->hard_timeout = hard_timeout;
1354 rule->flow_cookie = flow_cookie;
1355 rule->used = rule->created = time_msec();
1356 rule->send_flow_removed = send_flow_removed;
1357 list_init(&rule->facets);
1358 if (n_actions > 0) {
1359 rule->n_actions = n_actions;
1360 rule->actions = xmemdup(actions, n_actions * sizeof *actions);
1366 static struct rule *
1367 rule_from_cls_rule(const struct cls_rule *cls_rule)
1369 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
1373 rule_free(struct rule *rule)
1375 free(rule->actions);
1379 /* Destroys 'rule' and iterates through all of its facets and revalidates them,
1380 * destroying any that no longer has a rule (which is probably all of them).
1382 * The caller must have already removed 'rule' from the classifier. */
1384 rule_destroy(struct ofproto *ofproto, struct rule *rule)
1386 struct facet *facet, *next_facet;
1387 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
1388 facet_revalidate(ofproto, facet);
1393 /* Returns true if 'rule' has an OpenFlow OFPAT_OUTPUT or OFPAT_ENQUEUE action
1394 * that outputs to 'out_port' (output to OFPP_FLOOD and OFPP_ALL doesn't
1397 rule_has_out_port(const struct rule *rule, ovs_be16 out_port)
1399 const union ofp_action *oa;
1400 struct actions_iterator i;
1402 if (out_port == htons(OFPP_NONE)) {
1405 for (oa = actions_first(&i, rule->actions, rule->n_actions); oa;
1406 oa = actions_next(&i)) {
1407 if (action_outputs_to_port(oa, out_port)) {
1414 /* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
1415 * 'packet', which arrived on 'in_port'.
1417 * Takes ownership of 'packet'. */
1419 execute_odp_actions(struct ofproto *ofproto, const struct flow *flow,
1420 const struct nlattr *odp_actions, size_t actions_len,
1421 struct ofpbuf *packet)
1423 if (actions_len == NLA_ALIGN(NLA_HDRLEN + sizeof(uint64_t))
1424 && odp_actions->nla_type == ODP_ACTION_ATTR_CONTROLLER) {
1425 /* As an optimization, avoid a round-trip from userspace to kernel to
1426 * userspace. This also avoids possibly filling up kernel packet
1427 * buffers along the way. */
1428 struct dpif_upcall upcall;
1430 upcall.type = DPIF_UC_ACTION;
1431 upcall.packet = packet;
1434 upcall.userdata = nl_attr_get_u64(odp_actions);
1435 upcall.sample_pool = 0;
1436 upcall.actions = NULL;
1437 upcall.actions_len = 0;
1439 send_packet_in(ofproto, &upcall, flow, false);
1445 error = dpif_execute(ofproto->dpif, odp_actions, actions_len, packet);
1446 ofpbuf_delete(packet);
1451 /* Executes the actions indicated by 'facet' on 'packet' and credits 'facet''s
1452 * statistics appropriately. 'packet' must have at least sizeof(struct
1453 * ofp_packet_in) bytes of headroom.
1455 * For correct results, 'packet' must actually be in 'facet''s flow; that is,
1456 * applying flow_extract() to 'packet' would yield the same flow as
1459 * 'facet' must have accurately composed ODP actions; that is, it must not be
1460 * in need of revalidation.
1462 * Takes ownership of 'packet'. */
1464 facet_execute(struct ofproto *ofproto, struct facet *facet,
1465 struct ofpbuf *packet)
1467 struct dpif_flow_stats stats;
1469 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
1471 flow_extract_stats(&facet->flow, packet, &stats);
1472 stats.used = time_msec();
1473 if (execute_odp_actions(ofproto, &facet->flow,
1474 facet->actions, facet->actions_len, packet)) {
1475 facet_update_stats(ofproto, facet, &stats);
1479 /* Executes the actions indicated by 'rule' on 'packet' and credits 'rule''s
1480 * statistics (or the statistics for one of its facets) appropriately.
1481 * 'packet' must have at least sizeof(struct ofp_packet_in) bytes of headroom.
1483 * 'packet' doesn't necessarily have to match 'rule'. 'rule' will be credited
1484 * with statistics for 'packet' either way.
1486 * Takes ownership of 'packet'. */
1488 rule_execute(struct ofproto *ofproto, struct rule *rule, uint16_t in_port,
1489 struct ofpbuf *packet)
1491 struct action_xlate_ctx ctx;
1492 struct ofpbuf *odp_actions;
1493 struct facet *facet;
1497 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
1499 flow_extract(packet, 0, in_port, &flow);
1501 /* First look for a related facet. If we find one, account it to that. */
1502 facet = facet_lookup_valid(ofproto, &flow);
1503 if (facet && facet->rule == rule) {
1504 facet_execute(ofproto, facet, packet);
1508 /* Otherwise, if 'rule' is in fact the correct rule for 'packet', then
1509 * create a new facet for it and use that. */
1510 if (rule_lookup(ofproto, &flow) == rule) {
1511 facet = facet_create(ofproto, rule, &flow, packet);
1512 facet_execute(ofproto, facet, packet);
1513 facet_install(ofproto, facet, true);
1517 /* We can't account anything to a facet. If we were to try, then that
1518 * facet would have a non-matching rule, busting our invariants. */
1519 action_xlate_ctx_init(&ctx, ofproto, &flow, packet);
1520 odp_actions = xlate_actions(&ctx, rule->actions, rule->n_actions);
1521 size = packet->size;
1522 if (execute_odp_actions(ofproto, &flow, odp_actions->data,
1523 odp_actions->size, packet)) {
1524 rule->used = time_msec();
1525 rule->packet_count++;
1526 rule->byte_count += size;
1527 flow_push_stats(ofproto, rule, &flow, 1, size, rule->used);
1529 ofpbuf_delete(odp_actions);
1532 /* Inserts 'rule' into 'p''s flow table. */
1534 rule_insert(struct ofproto *p, struct rule *rule)
1536 struct rule *displaced_rule;
1538 displaced_rule = rule_from_cls_rule(classifier_insert(&p->cls, &rule->cr));
1539 if (displaced_rule) {
1540 rule_destroy(p, displaced_rule);
1542 p->need_revalidate = true;
1545 /* Creates and returns a new facet within 'ofproto' owned by 'rule', given a
1546 * 'flow' and an example 'packet' within that flow.
1548 * The caller must already have determined that no facet with an identical
1549 * 'flow' exists in 'ofproto' and that 'flow' is the best match for 'rule' in
1550 * 'ofproto''s classifier table. */
1551 static struct facet *
1552 facet_create(struct ofproto *ofproto, struct rule *rule,
1553 const struct flow *flow, const struct ofpbuf *packet)
1555 struct facet *facet;
1557 facet = xzalloc(sizeof *facet);
1558 facet->used = time_msec();
1559 hmap_insert(&ofproto->facets, &facet->hmap_node, flow_hash(flow, 0));
1560 list_push_back(&rule->facets, &facet->list_node);
1562 facet->flow = *flow;
1563 netflow_flow_init(&facet->nf_flow);
1564 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, facet->used);
1566 facet_make_actions(ofproto, facet, packet);
1572 facet_free(struct facet *facet)
1574 free(facet->actions);
1578 /* Remove 'rule' from 'ofproto' and free up the associated memory:
1580 * - Removes 'rule' from the classifier.
1582 * - If 'rule' has facets, revalidates them (and possibly uninstalls and
1583 * destroys them), via rule_destroy().
1586 rule_remove(struct ofproto *ofproto, struct rule *rule)
1588 COVERAGE_INC(ofproto_del_rule);
1589 ofproto->need_revalidate = true;
1590 classifier_remove(&ofproto->cls, &rule->cr);
1591 rule_destroy(ofproto, rule);
1594 /* Remove 'facet' from 'ofproto' and free up the associated memory:
1596 * - If 'facet' was installed in the datapath, uninstalls it and updates its
1597 * rule's statistics, via facet_uninstall().
1599 * - Removes 'facet' from its rule and from ofproto->facets.
1602 facet_remove(struct ofproto *ofproto, struct facet *facet)
1604 facet_uninstall(ofproto, facet);
1605 facet_flush_stats(ofproto, facet);
1606 hmap_remove(&ofproto->facets, &facet->hmap_node);
1607 list_remove(&facet->list_node);
1611 /* Composes the ODP actions for 'facet' based on its rule's actions. */
1613 facet_make_actions(struct ofproto *p, struct facet *facet,
1614 const struct ofpbuf *packet)
1616 const struct rule *rule = facet->rule;
1617 struct ofpbuf *odp_actions;
1618 struct action_xlate_ctx ctx;
1620 action_xlate_ctx_init(&ctx, p, &facet->flow, packet);
1621 odp_actions = xlate_actions(&ctx, rule->actions, rule->n_actions);
1622 facet->tags = ctx.tags;
1623 facet->may_install = ctx.may_set_up_flow;
1624 facet->nf_flow.output_iface = ctx.nf_output_iface;
1626 if (facet->actions_len != odp_actions->size
1627 || memcmp(facet->actions, odp_actions->data, odp_actions->size)) {
1628 free(facet->actions);
1629 facet->actions_len = odp_actions->size;
1630 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
1633 ofpbuf_delete(odp_actions);
1636 /* Updates 'facet''s flow in the datapath setting its actions to 'actions_len'
1637 * bytes of actions in 'actions'. If 'stats' is non-null, statistics counters
1638 * in the datapath will be zeroed and 'stats' will be updated with traffic new
1639 * since 'facet' was last updated.
1641 * Returns 0 if successful, otherwise a positive errno value.*/
1643 facet_put__(struct ofproto *ofproto, struct facet *facet,
1644 const struct nlattr *actions, size_t actions_len,
1645 struct dpif_flow_stats *stats)
1647 struct odputil_keybuf keybuf;
1648 enum dpif_flow_put_flags flags;
1652 flags = DPIF_FP_CREATE | DPIF_FP_MODIFY;
1654 flags |= DPIF_FP_ZERO_STATS;
1657 ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1658 odp_flow_key_from_flow(&key, &facet->flow);
1660 ret = dpif_flow_put(ofproto->dpif, flags, key.data, key.size,
1661 actions, actions_len, stats);
1664 facet_reset_dp_stats(facet, stats);
1670 /* If 'facet' is installable, inserts or re-inserts it into 'p''s datapath. If
1671 * 'zero_stats' is true, clears any existing statistics from the datapath for
1674 facet_install(struct ofproto *p, struct facet *facet, bool zero_stats)
1676 struct dpif_flow_stats stats;
1678 if (facet->may_install
1679 && !facet_put__(p, facet, facet->actions, facet->actions_len,
1680 zero_stats ? &stats : NULL)) {
1681 facet->installed = true;
1685 /* Ensures that the bytes in 'facet', plus 'extra_bytes', have been passed up
1686 * to the accounting hook function in the ofhooks structure. */
1688 facet_account(struct ofproto *ofproto,
1689 struct facet *facet, uint64_t extra_bytes)
1691 uint64_t total_bytes = facet->byte_count + extra_bytes;
1693 if (ofproto->ofhooks->account_flow_cb
1694 && total_bytes > facet->accounted_bytes)
1696 ofproto->ofhooks->account_flow_cb(
1697 &facet->flow, facet->tags, facet->actions, facet->actions_len,
1698 total_bytes - facet->accounted_bytes, ofproto->aux);
1699 facet->accounted_bytes = total_bytes;
1703 /* If 'rule' is installed in the datapath, uninstalls it. */
1705 facet_uninstall(struct ofproto *p, struct facet *facet)
1707 if (facet->installed) {
1708 struct odputil_keybuf keybuf;
1709 struct dpif_flow_stats stats;
1713 ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
1714 odp_flow_key_from_flow(&key, &facet->flow);
1716 error = dpif_flow_del(p->dpif, key.data, key.size, &stats);
1717 facet_reset_dp_stats(facet, &stats);
1719 facet_update_stats(p, facet, &stats);
1722 facet->installed = false;
1724 assert(facet->dp_packet_count == 0);
1725 assert(facet->dp_byte_count == 0);
1729 /* Returns true if the only action for 'facet' is to send to the controller.
1730 * (We don't report NetFlow expiration messages for such facets because they
1731 * are just part of the control logic for the network, not real traffic). */
1733 facet_is_controller_flow(struct facet *facet)
1736 && facet->rule->n_actions == 1
1737 && action_outputs_to_port(&facet->rule->actions[0],
1738 htons(OFPP_CONTROLLER)));
1741 /* Resets 'facet''s datapath statistics counters. This should be called when
1742 * 'facet''s statistics are cleared in the datapath. If 'stats' is non-null,
1743 * it should contain the statistics returned by dpif when 'facet' was reset in
1744 * the datapath. 'stats' will be modified to only included statistics new
1745 * since 'facet' was last updated. */
1747 facet_reset_dp_stats(struct facet *facet, struct dpif_flow_stats *stats)
1749 if (stats && facet->dp_packet_count < stats->n_packets
1750 && facet->dp_byte_count < stats->n_bytes) {
1751 stats->n_packets -= facet->dp_packet_count;
1752 stats->n_bytes -= facet->dp_byte_count;
1755 facet->dp_packet_count = 0;
1756 facet->dp_byte_count = 0;
1759 /* Folds all of 'facet''s statistics into its rule. Also updates the
1760 * accounting ofhook and emits a NetFlow expiration if appropriate. All of
1761 * 'facet''s statistics in the datapath should have been zeroed and folded into
1762 * its packet and byte counts before this function is called. */
1764 facet_flush_stats(struct ofproto *ofproto, struct facet *facet)
1766 assert(!facet->dp_byte_count);
1767 assert(!facet->dp_packet_count);
1769 facet_push_stats(ofproto, facet);
1770 facet_account(ofproto, facet, 0);
1772 if (ofproto->netflow && !facet_is_controller_flow(facet)) {
1773 struct ofexpired expired;
1774 expired.flow = facet->flow;
1775 expired.packet_count = facet->packet_count;
1776 expired.byte_count = facet->byte_count;
1777 expired.used = facet->used;
1778 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
1781 facet->rule->packet_count += facet->packet_count;
1782 facet->rule->byte_count += facet->byte_count;
1784 /* Reset counters to prevent double counting if 'facet' ever gets
1786 facet->packet_count = 0;
1787 facet->byte_count = 0;
1788 facet->rs_packet_count = 0;
1789 facet->rs_byte_count = 0;
1790 facet->accounted_bytes = 0;
1792 netflow_flow_clear(&facet->nf_flow);
1795 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
1796 * Returns it if found, otherwise a null pointer.
1798 * The returned facet might need revalidation; use facet_lookup_valid()
1799 * instead if that is important. */
1800 static struct facet *
1801 facet_find(struct ofproto *ofproto, const struct flow *flow)
1803 struct facet *facet;
1805 HMAP_FOR_EACH_WITH_HASH (facet, hmap_node, flow_hash(flow, 0),
1807 if (flow_equal(flow, &facet->flow)) {
1815 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
1816 * Returns it if found, otherwise a null pointer.
1818 * The returned facet is guaranteed to be valid. */
1819 static struct facet *
1820 facet_lookup_valid(struct ofproto *ofproto, const struct flow *flow)
1822 struct facet *facet = facet_find(ofproto, flow);
1824 /* The facet we found might not be valid, since we could be in need of
1825 * revalidation. If it is not valid, don't return it. */
1827 && ofproto->need_revalidate
1828 && !facet_revalidate(ofproto, facet)) {
1829 COVERAGE_INC(ofproto_invalidated);
1836 /* Re-searches 'ofproto''s classifier for a rule matching 'facet':
1838 * - If the rule found is different from 'facet''s current rule, moves
1839 * 'facet' to the new rule and recompiles its actions.
1841 * - If the rule found is the same as 'facet''s current rule, leaves 'facet'
1842 * where it is and recompiles its actions anyway.
1844 * - If there is none, destroys 'facet'.
1846 * Returns true if 'facet' still exists, false if it has been destroyed. */
1848 facet_revalidate(struct ofproto *ofproto, struct facet *facet)
1850 struct action_xlate_ctx ctx;
1851 struct ofpbuf *odp_actions;
1852 struct rule *new_rule;
1853 bool actions_changed;
1855 COVERAGE_INC(facet_revalidate);
1857 /* Determine the new rule. */
1858 new_rule = rule_lookup(ofproto, &facet->flow);
1860 /* No new rule, so delete the facet. */
1861 facet_remove(ofproto, facet);
1865 /* Calculate new ODP actions.
1867 * We do not modify any 'facet' state yet, because we might need to, e.g.,
1868 * emit a NetFlow expiration and, if so, we need to have the old state
1869 * around to properly compose it. */
1870 action_xlate_ctx_init(&ctx, ofproto, &facet->flow, NULL);
1871 odp_actions = xlate_actions(&ctx, new_rule->actions, new_rule->n_actions);
1872 actions_changed = (facet->actions_len != odp_actions->size
1873 || memcmp(facet->actions, odp_actions->data,
1874 facet->actions_len));
1876 /* If the ODP actions changed or the installability changed, then we need
1877 * to talk to the datapath. */
1878 if (actions_changed || ctx.may_set_up_flow != facet->installed) {
1879 if (ctx.may_set_up_flow) {
1880 struct dpif_flow_stats stats;
1882 facet_put__(ofproto, facet,
1883 odp_actions->data, odp_actions->size, &stats);
1884 facet_update_stats(ofproto, facet, &stats);
1886 facet_uninstall(ofproto, facet);
1889 /* The datapath flow is gone or has zeroed stats, so push stats out of
1890 * 'facet' into 'rule'. */
1891 facet_flush_stats(ofproto, facet);
1894 /* Update 'facet' now that we've taken care of all the old state. */
1895 facet->tags = ctx.tags;
1896 facet->nf_flow.output_iface = ctx.nf_output_iface;
1897 facet->may_install = ctx.may_set_up_flow;
1898 if (actions_changed) {
1899 free(facet->actions);
1900 facet->actions_len = odp_actions->size;
1901 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
1903 if (facet->rule != new_rule) {
1904 COVERAGE_INC(facet_changed_rule);
1905 list_remove(&facet->list_node);
1906 list_push_back(&new_rule->facets, &facet->list_node);
1907 facet->rule = new_rule;
1908 facet->used = new_rule->created;
1909 facet->rs_used = facet->used;
1912 ofpbuf_delete(odp_actions);
1918 send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh,
1921 struct ofpbuf *buf = ofputil_encode_error_msg(error, oh);
1923 COVERAGE_INC(ofproto_error);
1924 ofconn_send_reply(ofconn, buf);
1929 handle_echo_request(struct ofconn *ofconn, const struct ofp_header *oh)
1931 ofconn_send_reply(ofconn, make_echo_reply(oh));
1936 handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh)
1938 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1939 struct ofp_switch_features *osf;
1941 struct ofport *port;
1943 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
1944 osf->datapath_id = htonll(ofproto->datapath_id);
1945 osf->n_buffers = htonl(pktbuf_capacity());
1947 osf->capabilities = htonl(OFPC_FLOW_STATS | OFPC_TABLE_STATS |
1948 OFPC_PORT_STATS | OFPC_ARP_MATCH_IP);
1949 osf->actions = htonl((1u << OFPAT_OUTPUT) |
1950 (1u << OFPAT_SET_VLAN_VID) |
1951 (1u << OFPAT_SET_VLAN_PCP) |
1952 (1u << OFPAT_STRIP_VLAN) |
1953 (1u << OFPAT_SET_DL_SRC) |
1954 (1u << OFPAT_SET_DL_DST) |
1955 (1u << OFPAT_SET_NW_SRC) |
1956 (1u << OFPAT_SET_NW_DST) |
1957 (1u << OFPAT_SET_NW_TOS) |
1958 (1u << OFPAT_SET_TP_SRC) |
1959 (1u << OFPAT_SET_TP_DST) |
1960 (1u << OFPAT_ENQUEUE));
1962 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
1963 hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
1966 ofconn_send_reply(ofconn, buf);
1971 handle_get_config_request(struct ofconn *ofconn, const struct ofp_header *oh)
1973 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1975 struct ofp_switch_config *osc;
1979 /* Figure out flags. */
1980 dpif_get_drop_frags(ofproto->dpif, &drop_frags);
1981 flags = drop_frags ? OFPC_FRAG_DROP : OFPC_FRAG_NORMAL;
1984 osc = make_openflow_xid(sizeof *osc, OFPT_GET_CONFIG_REPLY, oh->xid, &buf);
1985 osc->flags = htons(flags);
1986 osc->miss_send_len = htons(ofconn_get_miss_send_len(ofconn));
1987 ofconn_send_reply(ofconn, buf);
1993 handle_set_config(struct ofconn *ofconn, const struct ofp_switch_config *osc)
1995 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
1996 uint16_t flags = ntohs(osc->flags);
1998 if (ofconn_get_type(ofconn) == OFCONN_PRIMARY
1999 && ofconn_get_role(ofconn) != NX_ROLE_SLAVE) {
2000 switch (flags & OFPC_FRAG_MASK) {
2001 case OFPC_FRAG_NORMAL:
2002 dpif_set_drop_frags(ofproto->dpif, false);
2004 case OFPC_FRAG_DROP:
2005 dpif_set_drop_frags(ofproto->dpif, true);
2008 VLOG_WARN_RL(&rl, "requested bad fragment mode (flags=%"PRIx16")",
2014 ofconn_set_miss_send_len(ofconn, ntohs(osc->miss_send_len));
2019 static void do_xlate_actions(const union ofp_action *in, size_t n_in,
2020 struct action_xlate_ctx *ctx);
2023 add_output_action(struct action_xlate_ctx *ctx, uint16_t port)
2025 const struct ofport *ofport = get_port(ctx->ofproto, port);
2028 if (ofport->opp.config & OFPPC_NO_FWD) {
2029 /* Forwarding disabled on port. */
2034 * We don't have an ofport record for this port, but it doesn't hurt to
2035 * allow forwarding to it anyhow. Maybe such a port will appear later
2036 * and we're pre-populating the flow table.
2040 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_OUTPUT, port);
2041 ctx->nf_output_iface = port;
2044 static struct rule *
2045 rule_lookup(struct ofproto *ofproto, const struct flow *flow)
2047 return rule_from_cls_rule(classifier_lookup(&ofproto->cls, flow));
2051 xlate_table_action(struct action_xlate_ctx *ctx, uint16_t in_port)
2053 if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
2054 uint16_t old_in_port;
2057 /* Look up a flow with 'in_port' as the input port. Then restore the
2058 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2059 * have surprising behavior). */
2060 old_in_port = ctx->flow.in_port;
2061 ctx->flow.in_port = in_port;
2062 rule = rule_lookup(ctx->ofproto, &ctx->flow);
2063 ctx->flow.in_port = old_in_port;
2065 if (ctx->resubmit_hook) {
2066 ctx->resubmit_hook(ctx, rule);
2071 do_xlate_actions(rule->actions, rule->n_actions, ctx);
2075 static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
2077 VLOG_ERR_RL(&recurse_rl, "NXAST_RESUBMIT recursed over %d times",
2078 MAX_RESUBMIT_RECURSION);
2083 flood_packets(struct ofproto *ofproto, uint16_t odp_in_port, uint32_t mask,
2084 uint16_t *nf_output_iface, struct ofpbuf *odp_actions)
2086 struct ofport *ofport;
2088 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
2089 uint16_t odp_port = ofport->odp_port;
2090 if (odp_port != odp_in_port && !(ofport->opp.config & mask)) {
2091 nl_msg_put_u32(odp_actions, ODP_ACTION_ATTR_OUTPUT, odp_port);
2094 *nf_output_iface = NF_OUT_FLOOD;
2098 xlate_output_action__(struct action_xlate_ctx *ctx,
2099 uint16_t port, uint16_t max_len)
2102 uint16_t prev_nf_output_iface = ctx->nf_output_iface;
2104 ctx->nf_output_iface = NF_OUT_DROP;
2108 add_output_action(ctx, ctx->flow.in_port);
2111 xlate_table_action(ctx, ctx->flow.in_port);
2114 if (!ctx->ofproto->ofhooks->normal_cb(&ctx->flow, ctx->packet,
2115 ctx->odp_actions, &ctx->tags,
2116 &ctx->nf_output_iface,
2117 ctx->ofproto->aux)) {
2118 COVERAGE_INC(ofproto_uninstallable);
2119 ctx->may_set_up_flow = false;
2123 flood_packets(ctx->ofproto, ctx->flow.in_port, OFPPC_NO_FLOOD,
2124 &ctx->nf_output_iface, ctx->odp_actions);
2127 flood_packets(ctx->ofproto, ctx->flow.in_port, 0,
2128 &ctx->nf_output_iface, ctx->odp_actions);
2130 case OFPP_CONTROLLER:
2131 nl_msg_put_u64(ctx->odp_actions, ODP_ACTION_ATTR_CONTROLLER, max_len);
2134 add_output_action(ctx, ODPP_LOCAL);
2137 odp_port = ofp_port_to_odp_port(port);
2138 if (odp_port != ctx->flow.in_port) {
2139 add_output_action(ctx, odp_port);
2144 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2145 ctx->nf_output_iface = NF_OUT_FLOOD;
2146 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
2147 ctx->nf_output_iface = prev_nf_output_iface;
2148 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2149 ctx->nf_output_iface != NF_OUT_FLOOD) {
2150 ctx->nf_output_iface = NF_OUT_MULTI;
2155 xlate_output_action(struct action_xlate_ctx *ctx,
2156 const struct ofp_action_output *oao)
2158 xlate_output_action__(ctx, ntohs(oao->port), ntohs(oao->max_len));
2161 /* If the final ODP action in 'ctx' is "pop priority", drop it, as an
2162 * optimization, because we're going to add another action that sets the
2163 * priority immediately after, or because there are no actions following the
2166 remove_pop_action(struct action_xlate_ctx *ctx)
2168 if (ctx->odp_actions->size == ctx->last_pop_priority) {
2169 ctx->odp_actions->size -= NLA_ALIGN(NLA_HDRLEN);
2170 ctx->last_pop_priority = -1;
2175 add_pop_action(struct action_xlate_ctx *ctx)
2177 if (ctx->odp_actions->size != ctx->last_pop_priority) {
2178 nl_msg_put_flag(ctx->odp_actions, ODP_ACTION_ATTR_POP_PRIORITY);
2179 ctx->last_pop_priority = ctx->odp_actions->size;
2184 xlate_enqueue_action(struct action_xlate_ctx *ctx,
2185 const struct ofp_action_enqueue *oae)
2187 uint16_t ofp_port, odp_port;
2191 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(oae->queue_id),
2194 /* Fall back to ordinary output action. */
2195 xlate_output_action__(ctx, ntohs(oae->port), 0);
2199 /* Figure out ODP output port. */
2200 ofp_port = ntohs(oae->port);
2201 if (ofp_port != OFPP_IN_PORT) {
2202 odp_port = ofp_port_to_odp_port(ofp_port);
2204 odp_port = ctx->flow.in_port;
2207 /* Add ODP actions. */
2208 remove_pop_action(ctx);
2209 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_SET_PRIORITY, priority);
2210 add_output_action(ctx, odp_port);
2211 add_pop_action(ctx);
2213 /* Update NetFlow output port. */
2214 if (ctx->nf_output_iface == NF_OUT_DROP) {
2215 ctx->nf_output_iface = odp_port;
2216 } else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
2217 ctx->nf_output_iface = NF_OUT_MULTI;
2222 xlate_set_queue_action(struct action_xlate_ctx *ctx,
2223 const struct nx_action_set_queue *nasq)
2228 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(nasq->queue_id),
2231 /* Couldn't translate queue to a priority, so ignore. A warning
2232 * has already been logged. */
2236 remove_pop_action(ctx);
2237 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_SET_PRIORITY, priority);
2241 xlate_set_dl_tci(struct action_xlate_ctx *ctx)
2243 ovs_be16 tci = ctx->flow.vlan_tci;
2244 if (!(tci & htons(VLAN_CFI))) {
2245 nl_msg_put_flag(ctx->odp_actions, ODP_ACTION_ATTR_STRIP_VLAN);
2247 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_TCI,
2248 tci & ~htons(VLAN_CFI));
2252 struct xlate_reg_state {
2258 save_reg_state(const struct action_xlate_ctx *ctx,
2259 struct xlate_reg_state *state)
2261 state->vlan_tci = ctx->flow.vlan_tci;
2262 state->tun_id = ctx->flow.tun_id;
2266 update_reg_state(struct action_xlate_ctx *ctx,
2267 const struct xlate_reg_state *state)
2269 if (ctx->flow.vlan_tci != state->vlan_tci) {
2270 xlate_set_dl_tci(ctx);
2272 if (ctx->flow.tun_id != state->tun_id) {
2273 nl_msg_put_be64(ctx->odp_actions,
2274 ODP_ACTION_ATTR_SET_TUNNEL, ctx->flow.tun_id);
2279 xlate_nicira_action(struct action_xlate_ctx *ctx,
2280 const struct nx_action_header *nah)
2282 const struct nx_action_resubmit *nar;
2283 const struct nx_action_set_tunnel *nast;
2284 const struct nx_action_set_queue *nasq;
2285 const struct nx_action_multipath *nam;
2286 const struct nx_action_autopath *naa;
2287 enum nx_action_subtype subtype = ntohs(nah->subtype);
2288 const struct ofhooks *ofhooks = ctx->ofproto->ofhooks;
2289 struct xlate_reg_state state;
2290 uint16_t autopath_port;
2293 assert(nah->vendor == htonl(NX_VENDOR_ID));
2295 case NXAST_RESUBMIT:
2296 nar = (const struct nx_action_resubmit *) nah;
2297 xlate_table_action(ctx, ofp_port_to_odp_port(ntohs(nar->in_port)));
2300 case NXAST_SET_TUNNEL:
2301 nast = (const struct nx_action_set_tunnel *) nah;
2302 tun_id = htonll(ntohl(nast->tun_id));
2303 nl_msg_put_be64(ctx->odp_actions, ODP_ACTION_ATTR_SET_TUNNEL, tun_id);
2304 ctx->flow.tun_id = tun_id;
2307 case NXAST_DROP_SPOOFED_ARP:
2308 if (ctx->flow.dl_type == htons(ETH_TYPE_ARP)) {
2309 nl_msg_put_flag(ctx->odp_actions,
2310 ODP_ACTION_ATTR_DROP_SPOOFED_ARP);
2314 case NXAST_SET_QUEUE:
2315 nasq = (const struct nx_action_set_queue *) nah;
2316 xlate_set_queue_action(ctx, nasq);
2319 case NXAST_POP_QUEUE:
2320 add_pop_action(ctx);
2323 case NXAST_REG_MOVE:
2324 save_reg_state(ctx, &state);
2325 nxm_execute_reg_move((const struct nx_action_reg_move *) nah,
2327 update_reg_state(ctx, &state);
2330 case NXAST_REG_LOAD:
2331 save_reg_state(ctx, &state);
2332 nxm_execute_reg_load((const struct nx_action_reg_load *) nah,
2334 update_reg_state(ctx, &state);
2338 /* Nothing to do. */
2341 case NXAST_SET_TUNNEL64:
2342 tun_id = ((const struct nx_action_set_tunnel64 *) nah)->tun_id;
2343 nl_msg_put_be64(ctx->odp_actions, ODP_ACTION_ATTR_SET_TUNNEL, tun_id);
2344 ctx->flow.tun_id = tun_id;
2347 case NXAST_MULTIPATH:
2348 nam = (const struct nx_action_multipath *) nah;
2349 multipath_execute(nam, &ctx->flow);
2352 case NXAST_AUTOPATH:
2353 naa = (const struct nx_action_autopath *) nah;
2354 autopath_port = (ofhooks->autopath_cb
2355 ? ofhooks->autopath_cb(&ctx->flow, ntohl(naa->id),
2356 &ctx->tags, ctx->ofproto->aux)
2358 autopath_execute(naa, &ctx->flow, autopath_port);
2361 /* If you add a new action here that modifies flow data, don't forget to
2362 * update the flow key in ctx->flow at the same time. */
2364 case NXAST_SNAT__OBSOLETE:
2366 VLOG_DBG_RL(&rl, "unknown Nicira action type %d", (int) subtype);
2372 do_xlate_actions(const union ofp_action *in, size_t n_in,
2373 struct action_xlate_ctx *ctx)
2375 struct actions_iterator iter;
2376 const union ofp_action *ia;
2377 const struct ofport *port;
2379 port = get_port(ctx->ofproto, ctx->flow.in_port);
2380 if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
2381 port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
2382 ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
2383 /* Drop this flow. */
2387 for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
2388 enum ofp_action_type type = ntohs(ia->type);
2389 const struct ofp_action_dl_addr *oada;
2393 xlate_output_action(ctx, &ia->output);
2396 case OFPAT_SET_VLAN_VID:
2397 ctx->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
2398 ctx->flow.vlan_tci |= ia->vlan_vid.vlan_vid | htons(VLAN_CFI);
2399 xlate_set_dl_tci(ctx);
2402 case OFPAT_SET_VLAN_PCP:
2403 ctx->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
2404 ctx->flow.vlan_tci |= htons(
2405 (ia->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
2406 xlate_set_dl_tci(ctx);
2409 case OFPAT_STRIP_VLAN:
2410 ctx->flow.vlan_tci = htons(0);
2411 xlate_set_dl_tci(ctx);
2414 case OFPAT_SET_DL_SRC:
2415 oada = ((struct ofp_action_dl_addr *) ia);
2416 nl_msg_put_unspec(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_SRC,
2417 oada->dl_addr, ETH_ADDR_LEN);
2418 memcpy(ctx->flow.dl_src, oada->dl_addr, ETH_ADDR_LEN);
2421 case OFPAT_SET_DL_DST:
2422 oada = ((struct ofp_action_dl_addr *) ia);
2423 nl_msg_put_unspec(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_DST,
2424 oada->dl_addr, ETH_ADDR_LEN);
2425 memcpy(ctx->flow.dl_dst, oada->dl_addr, ETH_ADDR_LEN);
2428 case OFPAT_SET_NW_SRC:
2429 nl_msg_put_be32(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_SRC,
2430 ia->nw_addr.nw_addr);
2431 ctx->flow.nw_src = ia->nw_addr.nw_addr;
2434 case OFPAT_SET_NW_DST:
2435 nl_msg_put_be32(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_DST,
2436 ia->nw_addr.nw_addr);
2437 ctx->flow.nw_dst = ia->nw_addr.nw_addr;
2440 case OFPAT_SET_NW_TOS:
2441 nl_msg_put_u8(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_TOS,
2443 ctx->flow.nw_tos = ia->nw_tos.nw_tos;
2446 case OFPAT_SET_TP_SRC:
2447 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_TP_SRC,
2448 ia->tp_port.tp_port);
2449 ctx->flow.tp_src = ia->tp_port.tp_port;
2452 case OFPAT_SET_TP_DST:
2453 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_TP_DST,
2454 ia->tp_port.tp_port);
2455 ctx->flow.tp_dst = ia->tp_port.tp_port;
2459 xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
2463 xlate_enqueue_action(ctx, (const struct ofp_action_enqueue *) ia);
2467 VLOG_DBG_RL(&rl, "unknown action type %d", (int) type);
2474 action_xlate_ctx_init(struct action_xlate_ctx *ctx,
2475 struct ofproto *ofproto, const struct flow *flow,
2476 const struct ofpbuf *packet)
2478 ctx->ofproto = ofproto;
2480 ctx->packet = packet;
2481 ctx->resubmit_hook = NULL;
2482 ctx->check_special = true;
2486 ofproto_process_cfm(struct ofproto *ofproto, const struct flow *flow,
2487 const struct ofpbuf *packet)
2489 struct ofport *ofport;
2491 ofport = get_port(ofproto, flow->in_port);
2492 if (ofport && ofport->cfm) {
2493 cfm_process_heartbeat(ofport->cfm, packet);
2497 static struct ofpbuf *
2498 xlate_actions(struct action_xlate_ctx *ctx,
2499 const union ofp_action *in, size_t n_in)
2501 COVERAGE_INC(ofproto_ofp2odp);
2503 ctx->odp_actions = ofpbuf_new(512);
2505 ctx->may_set_up_flow = true;
2506 ctx->nf_output_iface = NF_OUT_DROP;
2508 ctx->last_pop_priority = -1;
2510 if (ctx->check_special && cfm_should_process_flow(&ctx->flow)) {
2512 ofproto_process_cfm(ctx->ofproto, &ctx->flow, ctx->packet);
2514 ctx->may_set_up_flow = false;
2515 } else if (ctx->check_special
2516 && ctx->ofproto->ofhooks->special_cb
2517 && !ctx->ofproto->ofhooks->special_cb(&ctx->flow, ctx->packet,
2518 ctx->ofproto->aux)) {
2519 ctx->may_set_up_flow = false;
2521 do_xlate_actions(in, n_in, ctx);
2524 remove_pop_action(ctx);
2526 /* Check with in-band control to see if we're allowed to set up this
2528 if (!connmgr_may_set_up_flow(ctx->ofproto->connmgr, &ctx->flow,
2529 ctx->odp_actions->data,
2530 ctx->odp_actions->size)) {
2531 ctx->may_set_up_flow = false;
2534 return ctx->odp_actions;
2537 /* Checks whether 'ofconn' is a slave controller. If so, returns an OpenFlow
2538 * error message code (composed with ofp_mkerr()) for the caller to propagate
2539 * upward. Otherwise, returns 0.
2541 * The log message mentions 'msg_type'. */
2543 reject_slave_controller(struct ofconn *ofconn, const const char *msg_type)
2545 if (ofconn_get_type(ofconn) == OFCONN_PRIMARY
2546 && ofconn_get_role(ofconn) == NX_ROLE_SLAVE) {
2547 static struct vlog_rate_limit perm_rl = VLOG_RATE_LIMIT_INIT(1, 5);
2548 VLOG_WARN_RL(&perm_rl, "rejecting %s message from slave controller",
2551 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
2558 handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
2560 struct ofproto *p = ofconn_get_ofproto(ofconn);
2561 struct ofp_packet_out *opo;
2562 struct ofpbuf payload, *buffer;
2563 union ofp_action *ofp_actions;
2564 struct action_xlate_ctx ctx;
2565 struct ofpbuf *odp_actions;
2566 struct ofpbuf request;
2568 size_t n_ofp_actions;
2572 COVERAGE_INC(ofproto_packet_out);
2574 error = reject_slave_controller(ofconn, "OFPT_PACKET_OUT");
2579 /* Get ofp_packet_out. */
2580 ofpbuf_use_const(&request, oh, ntohs(oh->length));
2581 opo = ofpbuf_pull(&request, offsetof(struct ofp_packet_out, actions));
2584 error = ofputil_pull_actions(&request, ntohs(opo->actions_len),
2585 &ofp_actions, &n_ofp_actions);
2591 if (opo->buffer_id != htonl(UINT32_MAX)) {
2592 error = ofconn_pktbuf_retrieve(ofconn, ntohl(opo->buffer_id),
2594 if (error || !buffer) {
2603 /* Extract flow, check actions. */
2604 flow_extract(&payload, 0, ofp_port_to_odp_port(ntohs(opo->in_port)),
2606 error = validate_actions(ofp_actions, n_ofp_actions, &flow, p->max_ports);
2612 action_xlate_ctx_init(&ctx, p, &flow, &payload);
2613 odp_actions = xlate_actions(&ctx, ofp_actions, n_ofp_actions);
2614 dpif_execute(p->dpif, odp_actions->data, odp_actions->size, &payload);
2615 ofpbuf_delete(odp_actions);
2618 ofpbuf_delete(buffer);
2623 update_port_config(struct ofproto *p, struct ofport *port,
2624 uint32_t config, uint32_t mask)
2626 mask &= config ^ port->opp.config;
2627 if (mask & OFPPC_PORT_DOWN) {
2628 if (config & OFPPC_PORT_DOWN) {
2629 netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
2631 netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
2634 #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | \
2635 OFPPC_NO_FWD | OFPPC_NO_FLOOD)
2636 if (mask & REVALIDATE_BITS) {
2637 COVERAGE_INC(ofproto_costly_flags);
2638 port->opp.config ^= mask & REVALIDATE_BITS;
2639 p->need_revalidate = true;
2641 #undef REVALIDATE_BITS
2642 if (mask & OFPPC_NO_PACKET_IN) {
2643 port->opp.config ^= OFPPC_NO_PACKET_IN;
2648 handle_port_mod(struct ofconn *ofconn, const struct ofp_header *oh)
2650 struct ofproto *p = ofconn_get_ofproto(ofconn);
2651 const struct ofp_port_mod *opm = (const struct ofp_port_mod *) oh;
2652 struct ofport *port;
2655 error = reject_slave_controller(ofconn, "OFPT_PORT_MOD");
2660 port = get_port(p, ofp_port_to_odp_port(ntohs(opm->port_no)));
2662 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
2663 } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
2664 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR);
2666 update_port_config(p, port, ntohl(opm->config), ntohl(opm->mask));
2667 if (opm->advertise) {
2668 netdev_set_advertisements(port->netdev, ntohl(opm->advertise));
2674 static struct ofpbuf *
2675 make_ofp_stats_reply(ovs_be32 xid, ovs_be16 type, size_t body_len)
2677 struct ofp_stats_reply *osr;
2680 msg = ofpbuf_new(MIN(sizeof *osr + body_len, UINT16_MAX));
2681 osr = put_openflow_xid(sizeof *osr, OFPT_STATS_REPLY, xid, msg);
2683 osr->flags = htons(0);
2687 static struct ofpbuf *
2688 start_ofp_stats_reply(const struct ofp_header *request, size_t body_len)
2690 const struct ofp_stats_request *osr
2691 = (const struct ofp_stats_request *) request;
2692 return make_ofp_stats_reply(osr->header.xid, osr->type, body_len);
2696 append_ofp_stats_reply(size_t nbytes, struct ofconn *ofconn,
2697 struct ofpbuf **msgp)
2699 struct ofpbuf *msg = *msgp;
2700 assert(nbytes <= UINT16_MAX - sizeof(struct ofp_stats_reply));
2701 if (nbytes + msg->size > UINT16_MAX) {
2702 struct ofp_stats_reply *reply = msg->data;
2703 reply->flags = htons(OFPSF_REPLY_MORE);
2704 *msgp = make_ofp_stats_reply(reply->header.xid, reply->type, nbytes);
2705 ofconn_send_reply(ofconn, msg);
2707 return ofpbuf_put_uninit(*msgp, nbytes);
2710 static struct ofpbuf *
2711 make_nxstats_reply(ovs_be32 xid, ovs_be32 subtype, size_t body_len)
2713 struct nicira_stats_msg *nsm;
2716 msg = ofpbuf_new(MIN(sizeof *nsm + body_len, UINT16_MAX));
2717 nsm = put_openflow_xid(sizeof *nsm, OFPT_STATS_REPLY, xid, msg);
2718 nsm->type = htons(OFPST_VENDOR);
2719 nsm->flags = htons(0);
2720 nsm->vendor = htonl(NX_VENDOR_ID);
2721 nsm->subtype = subtype;
2725 static struct ofpbuf *
2726 start_nxstats_reply(const struct nicira_stats_msg *request, size_t body_len)
2728 return make_nxstats_reply(request->header.xid, request->subtype, body_len);
2732 append_nxstats_reply(size_t nbytes, struct ofconn *ofconn,
2733 struct ofpbuf **msgp)
2735 struct ofpbuf *msg = *msgp;
2736 assert(nbytes <= UINT16_MAX - sizeof(struct nicira_stats_msg));
2737 if (nbytes + msg->size > UINT16_MAX) {
2738 struct nicira_stats_msg *reply = msg->data;
2739 reply->flags = htons(OFPSF_REPLY_MORE);
2740 *msgp = make_nxstats_reply(reply->header.xid, reply->subtype, nbytes);
2741 ofconn_send_reply(ofconn, msg);
2743 ofpbuf_prealloc_tailroom(*msgp, nbytes);
2747 handle_desc_stats_request(struct ofconn *ofconn,
2748 const struct ofp_header *request)
2750 struct ofproto *p = ofconn_get_ofproto(ofconn);
2751 struct ofp_desc_stats *ods;
2754 msg = start_ofp_stats_reply(request, sizeof *ods);
2755 ods = append_ofp_stats_reply(sizeof *ods, ofconn, &msg);
2756 memset(ods, 0, sizeof *ods);
2757 ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
2758 ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
2759 ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
2760 ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
2761 ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
2762 ofconn_send_reply(ofconn, msg);
2768 handle_table_stats_request(struct ofconn *ofconn,
2769 const struct ofp_header *request)
2771 struct ofproto *p = ofconn_get_ofproto(ofconn);
2772 struct ofp_table_stats *ots;
2775 msg = start_ofp_stats_reply(request, sizeof *ots * 2);
2777 /* Classifier table. */
2778 ots = append_ofp_stats_reply(sizeof *ots, ofconn, &msg);
2779 memset(ots, 0, sizeof *ots);
2780 strcpy(ots->name, "classifier");
2781 ots->wildcards = htonl(OFPFW_ALL);
2782 ots->max_entries = htonl(1024 * 1024); /* An arbitrary big number. */
2783 ots->active_count = htonl(classifier_count(&p->cls));
2784 put_32aligned_be64(&ots->lookup_count, htonll(0)); /* XXX */
2785 put_32aligned_be64(&ots->matched_count, htonll(0)); /* XXX */
2787 ofconn_send_reply(ofconn, msg);
2792 append_port_stat(struct ofport *port, struct ofconn *ofconn,
2793 struct ofpbuf **msgp)
2795 struct netdev_stats stats;
2796 struct ofp_port_stats *ops;
2798 /* Intentionally ignore return value, since errors will set
2799 * 'stats' to all-1s, which is correct for OpenFlow, and
2800 * netdev_get_stats() will log errors. */
2801 netdev_get_stats(port->netdev, &stats);
2803 ops = append_ofp_stats_reply(sizeof *ops, ofconn, msgp);
2804 ops->port_no = htons(port->opp.port_no);
2805 memset(ops->pad, 0, sizeof ops->pad);
2806 put_32aligned_be64(&ops->rx_packets, htonll(stats.rx_packets));
2807 put_32aligned_be64(&ops->tx_packets, htonll(stats.tx_packets));
2808 put_32aligned_be64(&ops->rx_bytes, htonll(stats.rx_bytes));
2809 put_32aligned_be64(&ops->tx_bytes, htonll(stats.tx_bytes));
2810 put_32aligned_be64(&ops->rx_dropped, htonll(stats.rx_dropped));
2811 put_32aligned_be64(&ops->tx_dropped, htonll(stats.tx_dropped));
2812 put_32aligned_be64(&ops->rx_errors, htonll(stats.rx_errors));
2813 put_32aligned_be64(&ops->tx_errors, htonll(stats.tx_errors));
2814 put_32aligned_be64(&ops->rx_frame_err, htonll(stats.rx_frame_errors));
2815 put_32aligned_be64(&ops->rx_over_err, htonll(stats.rx_over_errors));
2816 put_32aligned_be64(&ops->rx_crc_err, htonll(stats.rx_crc_errors));
2817 put_32aligned_be64(&ops->collisions, htonll(stats.collisions));
2821 handle_port_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
2823 struct ofproto *p = ofconn_get_ofproto(ofconn);
2824 const struct ofp_port_stats_request *psr = ofputil_stats_body(oh);
2825 struct ofp_port_stats *ops;
2827 struct ofport *port;
2829 msg = start_ofp_stats_reply(oh, sizeof *ops * 16);
2830 if (psr->port_no != htons(OFPP_NONE)) {
2831 port = get_port(p, ofp_port_to_odp_port(ntohs(psr->port_no)));
2833 append_port_stat(port, ofconn, &msg);
2836 HMAP_FOR_EACH (port, hmap_node, &p->ports) {
2837 append_port_stat(port, ofconn, &msg);
2841 ofconn_send_reply(ofconn, msg);
2846 calc_flow_duration__(long long int start, uint32_t *sec, uint32_t *nsec)
2848 long long int msecs = time_msec() - start;
2849 *sec = msecs / 1000;
2850 *nsec = (msecs % 1000) * (1000 * 1000);
2854 calc_flow_duration(long long int start, ovs_be32 *sec_be, ovs_be32 *nsec_be)
2858 calc_flow_duration__(start, &sec, &nsec);
2859 *sec_be = htonl(sec);
2860 *nsec_be = htonl(nsec);
2864 put_ofp_flow_stats(struct ofconn *ofconn, struct rule *rule,
2865 ovs_be16 out_port, struct ofpbuf **replyp)
2867 struct ofp_flow_stats *ofs;
2868 uint64_t packet_count, byte_count;
2869 size_t act_len, len;
2871 if (rule_is_hidden(rule) || !rule_has_out_port(rule, out_port)) {
2875 act_len = sizeof *rule->actions * rule->n_actions;
2876 len = offsetof(struct ofp_flow_stats, actions) + act_len;
2878 rule_get_stats(rule, &packet_count, &byte_count);
2880 ofs = append_ofp_stats_reply(len, ofconn, replyp);
2881 ofs->length = htons(len);
2884 ofputil_cls_rule_to_match(&rule->cr, &ofs->match);
2885 put_32aligned_be64(&ofs->cookie, rule->flow_cookie);
2886 calc_flow_duration(rule->created, &ofs->duration_sec, &ofs->duration_nsec);
2887 ofs->priority = htons(rule->cr.priority);
2888 ofs->idle_timeout = htons(rule->idle_timeout);
2889 ofs->hard_timeout = htons(rule->hard_timeout);
2890 memset(ofs->pad2, 0, sizeof ofs->pad2);
2891 put_32aligned_be64(&ofs->packet_count, htonll(packet_count));
2892 put_32aligned_be64(&ofs->byte_count, htonll(byte_count));
2893 if (rule->n_actions > 0) {
2894 memcpy(ofs->actions, rule->actions, act_len);
2899 is_valid_table(uint8_t table_id)
2901 if (table_id == 0 || table_id == 0xff) {
2904 /* It would probably be better to reply with an error but there doesn't
2905 * seem to be any appropriate value, so that might just be
2907 VLOG_WARN_RL(&rl, "controller asked for invalid table %"PRIu8,
2914 handle_flow_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
2916 const struct ofp_flow_stats_request *fsr = ofputil_stats_body(oh);
2917 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
2918 struct ofpbuf *reply;
2920 COVERAGE_INC(ofproto_flows_req);
2921 reply = start_ofp_stats_reply(oh, 1024);
2922 if (is_valid_table(fsr->table_id)) {
2923 struct cls_cursor cursor;
2924 struct cls_rule target;
2927 ofputil_cls_rule_from_match(&fsr->match, 0, &target);
2928 cls_cursor_init(&cursor, &ofproto->cls, &target);
2929 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
2930 put_ofp_flow_stats(ofconn, rule, fsr->out_port, &reply);
2933 ofconn_send_reply(ofconn, reply);
2939 put_nx_flow_stats(struct ofconn *ofconn, struct rule *rule,
2940 ovs_be16 out_port, struct ofpbuf **replyp)
2942 struct nx_flow_stats *nfs;
2943 uint64_t packet_count, byte_count;
2944 size_t act_len, start_len;
2945 struct ofpbuf *reply;
2947 if (rule_is_hidden(rule) || !rule_has_out_port(rule, out_port)) {
2951 rule_get_stats(rule, &packet_count, &byte_count);
2953 act_len = sizeof *rule->actions * rule->n_actions;
2955 append_nxstats_reply(sizeof *nfs + NXM_MAX_LEN + act_len, ofconn, replyp);
2956 start_len = (*replyp)->size;
2959 nfs = ofpbuf_put_uninit(reply, sizeof *nfs);
2962 calc_flow_duration(rule->created, &nfs->duration_sec, &nfs->duration_nsec);
2963 nfs->cookie = rule->flow_cookie;
2964 nfs->priority = htons(rule->cr.priority);
2965 nfs->idle_timeout = htons(rule->idle_timeout);
2966 nfs->hard_timeout = htons(rule->hard_timeout);
2967 nfs->match_len = htons(nx_put_match(reply, &rule->cr));
2968 memset(nfs->pad2, 0, sizeof nfs->pad2);
2969 nfs->packet_count = htonll(packet_count);
2970 nfs->byte_count = htonll(byte_count);
2971 if (rule->n_actions > 0) {
2972 ofpbuf_put(reply, rule->actions, act_len);
2974 nfs->length = htons(reply->size - start_len);
2978 handle_nxst_flow(struct ofconn *ofconn, const struct ofp_header *oh)
2980 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
2981 struct nx_flow_stats_request *nfsr;
2982 struct cls_rule target;
2983 struct ofpbuf *reply;
2987 ofpbuf_use_const(&b, oh, ntohs(oh->length));
2989 /* Dissect the message. */
2990 nfsr = ofpbuf_pull(&b, sizeof *nfsr);
2991 error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &target);
2996 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
2999 COVERAGE_INC(ofproto_flows_req);
3000 reply = start_nxstats_reply(&nfsr->nsm, 1024);
3001 if (is_valid_table(nfsr->table_id)) {
3002 struct cls_cursor cursor;
3005 cls_cursor_init(&cursor, &ofproto->cls, &target);
3006 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3007 put_nx_flow_stats(ofconn, rule, nfsr->out_port, &reply);
3010 ofconn_send_reply(ofconn, reply);
3016 flow_stats_ds(struct rule *rule, struct ds *results)
3018 uint64_t packet_count, byte_count;
3019 size_t act_len = sizeof *rule->actions * rule->n_actions;
3021 rule_get_stats(rule, &packet_count, &byte_count);
3023 ds_put_format(results, "duration=%llds, ",
3024 (time_msec() - rule->created) / 1000);
3025 ds_put_format(results, "idle=%.3fs, ", (time_msec() - rule->used) / 1000.0);
3026 ds_put_format(results, "priority=%u, ", rule->cr.priority);
3027 ds_put_format(results, "n_packets=%"PRIu64", ", packet_count);
3028 ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
3029 cls_rule_format(&rule->cr, results);
3030 ds_put_char(results, ',');
3032 ofp_print_actions(results, &rule->actions->header, act_len);
3034 ds_put_cstr(results, "drop");
3036 ds_put_cstr(results, "\n");
3039 /* Adds a pretty-printed description of all flows to 'results', including
3040 * hidden flows (e.g., set up by in-band control). */
3042 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
3044 struct cls_cursor cursor;
3047 cls_cursor_init(&cursor, &p->cls, NULL);
3048 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3049 flow_stats_ds(rule, results);
3054 query_aggregate_stats(struct ofproto *ofproto, struct cls_rule *target,
3055 ovs_be16 out_port, uint8_t table_id,
3056 struct ofp_aggregate_stats_reply *oasr)
3058 uint64_t total_packets = 0;
3059 uint64_t total_bytes = 0;
3062 COVERAGE_INC(ofproto_agg_request);
3064 if (is_valid_table(table_id)) {
3065 struct cls_cursor cursor;
3068 cls_cursor_init(&cursor, &ofproto->cls, target);
3069 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3070 if (!rule_is_hidden(rule) && rule_has_out_port(rule, out_port)) {
3071 uint64_t packet_count;
3072 uint64_t byte_count;
3074 rule_get_stats(rule, &packet_count, &byte_count);
3076 total_packets += packet_count;
3077 total_bytes += byte_count;
3083 oasr->flow_count = htonl(n_flows);
3084 put_32aligned_be64(&oasr->packet_count, htonll(total_packets));
3085 put_32aligned_be64(&oasr->byte_count, htonll(total_bytes));
3086 memset(oasr->pad, 0, sizeof oasr->pad);
3090 handle_aggregate_stats_request(struct ofconn *ofconn,
3091 const struct ofp_header *oh)
3093 const struct ofp_aggregate_stats_request *request = ofputil_stats_body(oh);
3094 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3095 struct ofp_aggregate_stats_reply *reply;
3096 struct cls_rule target;
3099 ofputil_cls_rule_from_match(&request->match, 0, &target);
3101 msg = start_ofp_stats_reply(oh, sizeof *reply);
3102 reply = append_ofp_stats_reply(sizeof *reply, ofconn, &msg);
3103 query_aggregate_stats(ofproto, &target, request->out_port,
3104 request->table_id, reply);
3105 ofconn_send_reply(ofconn, msg);
3110 handle_nxst_aggregate(struct ofconn *ofconn, const struct ofp_header *oh)
3112 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3113 struct nx_aggregate_stats_request *request;
3114 struct ofp_aggregate_stats_reply *reply;
3115 struct cls_rule target;
3120 ofpbuf_use_const(&b, oh, ntohs(oh->length));
3122 /* Dissect the message. */
3123 request = ofpbuf_pull(&b, sizeof *request);
3124 error = nx_pull_match(&b, ntohs(request->match_len), 0, &target);
3129 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3133 COVERAGE_INC(ofproto_flows_req);
3134 buf = start_nxstats_reply(&request->nsm, sizeof *reply);
3135 reply = ofpbuf_put_uninit(buf, sizeof *reply);
3136 query_aggregate_stats(ofproto, &target, request->out_port,
3137 request->table_id, reply);
3138 ofconn_send_reply(ofconn, buf);
3143 struct queue_stats_cbdata {
3144 struct ofconn *ofconn;
3145 struct ofport *ofport;
3150 put_queue_stats(struct queue_stats_cbdata *cbdata, uint32_t queue_id,
3151 const struct netdev_queue_stats *stats)
3153 struct ofp_queue_stats *reply;
3155 reply = append_ofp_stats_reply(sizeof *reply, cbdata->ofconn, &cbdata->msg);
3156 reply->port_no = htons(cbdata->ofport->opp.port_no);
3157 memset(reply->pad, 0, sizeof reply->pad);
3158 reply->queue_id = htonl(queue_id);
3159 put_32aligned_be64(&reply->tx_bytes, htonll(stats->tx_bytes));
3160 put_32aligned_be64(&reply->tx_packets, htonll(stats->tx_packets));
3161 put_32aligned_be64(&reply->tx_errors, htonll(stats->tx_errors));
3165 handle_queue_stats_dump_cb(uint32_t queue_id,
3166 struct netdev_queue_stats *stats,
3169 struct queue_stats_cbdata *cbdata = cbdata_;
3171 put_queue_stats(cbdata, queue_id, stats);
3175 handle_queue_stats_for_port(struct ofport *port, uint32_t queue_id,
3176 struct queue_stats_cbdata *cbdata)
3178 cbdata->ofport = port;
3179 if (queue_id == OFPQ_ALL) {
3180 netdev_dump_queue_stats(port->netdev,
3181 handle_queue_stats_dump_cb, cbdata);
3183 struct netdev_queue_stats stats;
3185 if (!netdev_get_queue_stats(port->netdev, queue_id, &stats)) {
3186 put_queue_stats(cbdata, queue_id, &stats);
3192 handle_queue_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
3194 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3195 const struct ofp_queue_stats_request *qsr;
3196 struct queue_stats_cbdata cbdata;
3197 struct ofport *port;
3198 unsigned int port_no;
3201 qsr = ofputil_stats_body(oh);
3203 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3206 COVERAGE_INC(ofproto_queue_req);
3208 cbdata.ofconn = ofconn;
3209 cbdata.msg = start_ofp_stats_reply(oh, 128);
3211 port_no = ntohs(qsr->port_no);
3212 queue_id = ntohl(qsr->queue_id);
3213 if (port_no == OFPP_ALL) {
3214 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
3215 handle_queue_stats_for_port(port, queue_id, &cbdata);
3217 } else if (port_no < ofproto->max_ports) {
3218 port = get_port(ofproto, ofp_port_to_odp_port(port_no));
3220 handle_queue_stats_for_port(port, queue_id, &cbdata);
3223 ofpbuf_delete(cbdata.msg);
3224 return ofp_mkerr(OFPET_QUEUE_OP_FAILED, OFPQOFC_BAD_PORT);
3226 ofconn_send_reply(ofconn, cbdata.msg);
3231 /* Updates 'facet''s used time. Caller is responsible for calling
3232 * facet_push_stats() to update the flows which 'facet' resubmits into. */
3234 facet_update_time(struct ofproto *ofproto, struct facet *facet,
3237 if (used > facet->used) {
3239 if (used > facet->rule->used) {
3240 facet->rule->used = used;
3242 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, used);
3246 /* Folds the statistics from 'stats' into the counters in 'facet'.
3248 * Because of the meaning of a facet's counters, it only makes sense to do this
3249 * if 'stats' are not tracked in the datapath, that is, if 'stats' represents a
3250 * packet that was sent by hand or if it represents statistics that have been
3251 * cleared out of the datapath. */
3253 facet_update_stats(struct ofproto *ofproto, struct facet *facet,
3254 const struct dpif_flow_stats *stats)
3256 if (stats->n_packets || stats->used > facet->used) {
3257 facet_update_time(ofproto, facet, stats->used);
3258 facet->packet_count += stats->n_packets;
3259 facet->byte_count += stats->n_bytes;
3260 facet_push_stats(ofproto, facet);
3261 netflow_flow_update_flags(&facet->nf_flow, stats->tcp_flags);
3266 facet_push_stats(struct ofproto *ofproto, struct facet *facet)
3268 uint64_t rs_packets, rs_bytes;
3270 assert(facet->packet_count >= facet->rs_packet_count);
3271 assert(facet->byte_count >= facet->rs_byte_count);
3272 assert(facet->used >= facet->rs_used);
3274 rs_packets = facet->packet_count - facet->rs_packet_count;
3275 rs_bytes = facet->byte_count - facet->rs_byte_count;
3277 if (rs_packets || rs_bytes || facet->used > facet->rs_used) {
3278 facet->rs_packet_count = facet->packet_count;
3279 facet->rs_byte_count = facet->byte_count;
3280 facet->rs_used = facet->used;
3282 flow_push_stats(ofproto, facet->rule, &facet->flow,
3283 rs_packets, rs_bytes, facet->used);
3287 struct ofproto_push {
3288 struct action_xlate_ctx ctx;
3295 push_resubmit(struct action_xlate_ctx *ctx, struct rule *rule)
3297 struct ofproto_push *push = CONTAINER_OF(ctx, struct ofproto_push, ctx);
3300 rule->packet_count += push->packets;
3301 rule->byte_count += push->bytes;
3302 rule->used = MAX(push->used, rule->used);
3306 /* Pushes flow statistics to the rules which 'flow' resubmits into given
3307 * 'rule''s actions. */
3309 flow_push_stats(struct ofproto *ofproto, const struct rule *rule,
3310 struct flow *flow, uint64_t packets, uint64_t bytes,
3313 struct ofproto_push push;
3315 push.packets = packets;
3319 action_xlate_ctx_init(&push.ctx, ofproto, flow, NULL);
3320 push.ctx.resubmit_hook = push_resubmit;
3321 ofpbuf_delete(xlate_actions(&push.ctx, rule->actions, rule->n_actions));
3324 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
3325 * in which no matching flow already exists in the flow table.
3327 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
3328 * ofp_actions, to the ofproto's flow table. Returns 0 on success or an
3329 * OpenFlow error code as encoded by ofp_mkerr() on failure.
3331 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3334 add_flow(struct ofconn *ofconn, struct flow_mod *fm)
3336 struct ofproto *p = ofconn_get_ofproto(ofconn);
3337 struct ofpbuf *packet;
3342 if (fm->flags & OFPFF_CHECK_OVERLAP
3343 && classifier_rule_overlaps(&p->cls, &fm->cr)) {
3344 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP);
3348 if (fm->buffer_id != UINT32_MAX) {
3349 error = ofconn_pktbuf_retrieve(ofconn, fm->buffer_id,
3353 in_port = UINT16_MAX;
3356 rule = rule_create(&fm->cr, fm->actions, fm->n_actions,
3357 fm->idle_timeout, fm->hard_timeout, fm->cookie,
3358 fm->flags & OFPFF_SEND_FLOW_REM);
3359 rule_insert(p, rule);
3361 rule_execute(p, rule, in_port, packet);
3366 static struct rule *
3367 find_flow_strict(struct ofproto *p, const struct flow_mod *fm)
3369 return rule_from_cls_rule(classifier_find_rule_exactly(&p->cls, &fm->cr));
3373 send_buffered_packet(struct ofconn *ofconn,
3374 struct rule *rule, uint32_t buffer_id)
3376 struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
3377 struct ofpbuf *packet;
3381 if (buffer_id == UINT32_MAX) {
3385 error = ofconn_pktbuf_retrieve(ofconn, buffer_id, &packet, &in_port);
3390 rule_execute(ofproto, rule, in_port, packet);
3395 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
3397 struct modify_flows_cbdata {
3398 struct ofproto *ofproto;
3399 const struct flow_mod *fm;
3403 static int modify_flow(struct ofproto *, const struct flow_mod *,
3406 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
3407 * encoded by ofp_mkerr() on failure.
3409 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3412 modify_flows_loose(struct ofconn *ofconn, struct flow_mod *fm)
3414 struct ofproto *p = ofconn_get_ofproto(ofconn);
3415 struct rule *match = NULL;
3416 struct cls_cursor cursor;
3419 cls_cursor_init(&cursor, &p->cls, &fm->cr);
3420 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3421 if (!rule_is_hidden(rule)) {
3423 modify_flow(p, fm, rule);
3428 /* This credits the packet to whichever flow happened to match last.
3429 * That's weird. Maybe we should do a lookup for the flow that
3430 * actually matches the packet? Who knows. */
3431 send_buffered_packet(ofconn, match, fm->buffer_id);
3434 return add_flow(ofconn, fm);
3438 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
3439 * code as encoded by ofp_mkerr() on failure.
3441 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3444 modify_flow_strict(struct ofconn *ofconn, struct flow_mod *fm)
3446 struct ofproto *p = ofconn_get_ofproto(ofconn);
3447 struct rule *rule = find_flow_strict(p, fm);
3448 if (rule && !rule_is_hidden(rule)) {
3449 modify_flow(p, fm, rule);
3450 return send_buffered_packet(ofconn, rule, fm->buffer_id);
3452 return add_flow(ofconn, fm);
3456 /* Implements core of OFPFC_MODIFY and OFPFC_MODIFY_STRICT where 'rule' has
3457 * been identified as a flow in 'p''s flow table to be modified, by changing
3458 * the rule's actions to match those in 'ofm' (which is followed by 'n_actions'
3459 * ofp_action[] structures). */
3461 modify_flow(struct ofproto *p, const struct flow_mod *fm, struct rule *rule)
3463 size_t actions_len = fm->n_actions * sizeof *rule->actions;
3465 rule->flow_cookie = fm->cookie;
3467 /* If the actions are the same, do nothing. */
3468 if (fm->n_actions == rule->n_actions
3470 || !memcmp(fm->actions, rule->actions, actions_len))) {
3474 /* Replace actions. */
3475 free(rule->actions);
3476 rule->actions = fm->n_actions ? xmemdup(fm->actions, actions_len) : NULL;
3477 rule->n_actions = fm->n_actions;
3479 p->need_revalidate = true;
3484 /* OFPFC_DELETE implementation. */
3486 static void delete_flow(struct ofproto *, struct rule *, ovs_be16 out_port);
3488 /* Implements OFPFC_DELETE. */
3490 delete_flows_loose(struct ofproto *p, const struct flow_mod *fm)
3492 struct rule *rule, *next_rule;
3493 struct cls_cursor cursor;
3495 cls_cursor_init(&cursor, &p->cls, &fm->cr);
3496 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
3497 delete_flow(p, rule, htons(fm->out_port));
3501 /* Implements OFPFC_DELETE_STRICT. */
3503 delete_flow_strict(struct ofproto *p, struct flow_mod *fm)
3505 struct rule *rule = find_flow_strict(p, fm);
3507 delete_flow(p, rule, htons(fm->out_port));
3511 /* Implements core of OFPFC_DELETE and OFPFC_DELETE_STRICT where 'rule' has
3512 * been identified as a flow to delete from 'p''s flow table, by deleting the
3513 * flow and sending out a OFPT_FLOW_REMOVED message to any interested
3516 * Will not delete 'rule' if it is hidden. Will delete 'rule' only if
3517 * 'out_port' is htons(OFPP_NONE) or if 'rule' actually outputs to the
3518 * specified 'out_port'. */
3520 delete_flow(struct ofproto *p, struct rule *rule, ovs_be16 out_port)
3522 if (rule_is_hidden(rule)) {
3526 if (out_port != htons(OFPP_NONE) && !rule_has_out_port(rule, out_port)) {
3530 rule_send_removed(p, rule, OFPRR_DELETE);
3531 rule_remove(p, rule);
3535 handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh)
3537 struct ofproto *p = ofconn_get_ofproto(ofconn);
3541 error = reject_slave_controller(ofconn, "flow_mod");
3546 error = ofputil_decode_flow_mod(&fm, oh);
3551 /* We do not support the emergency flow cache. It will hopefully get
3552 * dropped from OpenFlow in the near future. */
3553 if (fm.flags & OFPFF_EMERG) {
3554 /* There isn't a good fit for an error code, so just state that the
3555 * flow table is full. */
3556 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
3559 error = validate_actions(fm.actions, fm.n_actions,
3560 &fm.cr.flow, p->max_ports);
3565 switch (fm.command) {
3567 return add_flow(ofconn, &fm);
3570 return modify_flows_loose(ofconn, &fm);
3572 case OFPFC_MODIFY_STRICT:
3573 return modify_flow_strict(ofconn, &fm);
3576 delete_flows_loose(p, &fm);
3579 case OFPFC_DELETE_STRICT:
3580 delete_flow_strict(p, &fm);
3584 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND);
3589 handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh)
3591 struct nx_role_request *nrr = (struct nx_role_request *) oh;
3592 struct nx_role_request *reply;
3596 if (ofconn_get_type(ofconn) != OFCONN_PRIMARY) {
3597 VLOG_WARN_RL(&rl, "ignoring role request on service connection");
3598 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
3601 role = ntohl(nrr->role);
3602 if (role != NX_ROLE_OTHER && role != NX_ROLE_MASTER
3603 && role != NX_ROLE_SLAVE) {
3604 VLOG_WARN_RL(&rl, "received request for unknown role %"PRIu32, role);
3606 /* There's no good error code for this. */
3607 return ofp_mkerr(OFPET_BAD_REQUEST, -1);
3610 ofconn_set_role(ofconn, role);
3612 reply = make_nxmsg_xid(sizeof *reply, NXT_ROLE_REPLY, oh->xid, &buf);
3613 reply->role = htonl(role);
3614 ofconn_send_reply(ofconn, buf);
3620 handle_nxt_set_flow_format(struct ofconn *ofconn, const struct ofp_header *oh)
3622 const struct nxt_set_flow_format *msg
3623 = (const struct nxt_set_flow_format *) oh;
3626 format = ntohl(msg->format);
3627 if (format == NXFF_OPENFLOW10
3628 || format == NXFF_NXM) {
3629 ofconn_set_flow_format(ofconn, format);
3632 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
3637 handle_barrier_request(struct ofconn *ofconn, const struct ofp_header *oh)
3639 struct ofp_header *ob;
3642 /* Currently, everything executes synchronously, so we can just
3643 * immediately send the barrier reply. */
3644 ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
3645 ofconn_send_reply(ofconn, buf);
3650 handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
3652 const struct ofp_header *oh = msg->data;
3653 const struct ofputil_msg_type *type;
3656 error = ofputil_decode_msg_type(oh, &type);
3661 switch (ofputil_msg_type_code(type)) {
3662 /* OpenFlow requests. */
3663 case OFPUTIL_OFPT_ECHO_REQUEST:
3664 return handle_echo_request(ofconn, oh);
3666 case OFPUTIL_OFPT_FEATURES_REQUEST:
3667 return handle_features_request(ofconn, oh);
3669 case OFPUTIL_OFPT_GET_CONFIG_REQUEST:
3670 return handle_get_config_request(ofconn, oh);
3672 case OFPUTIL_OFPT_SET_CONFIG:
3673 return handle_set_config(ofconn, msg->data);
3675 case OFPUTIL_OFPT_PACKET_OUT:
3676 return handle_packet_out(ofconn, oh);
3678 case OFPUTIL_OFPT_PORT_MOD:
3679 return handle_port_mod(ofconn, oh);
3681 case OFPUTIL_OFPT_FLOW_MOD:
3682 return handle_flow_mod(ofconn, oh);
3684 case OFPUTIL_OFPT_BARRIER_REQUEST:
3685 return handle_barrier_request(ofconn, oh);
3687 /* OpenFlow replies. */
3688 case OFPUTIL_OFPT_ECHO_REPLY:
3691 /* Nicira extension requests. */
3692 case OFPUTIL_NXT_ROLE_REQUEST:
3693 return handle_role_request(ofconn, oh);
3695 case OFPUTIL_NXT_SET_FLOW_FORMAT:
3696 return handle_nxt_set_flow_format(ofconn, oh);
3698 case OFPUTIL_NXT_FLOW_MOD:
3699 return handle_flow_mod(ofconn, oh);
3701 /* OpenFlow statistics requests. */
3702 case OFPUTIL_OFPST_DESC_REQUEST:
3703 return handle_desc_stats_request(ofconn, oh);
3705 case OFPUTIL_OFPST_FLOW_REQUEST:
3706 return handle_flow_stats_request(ofconn, oh);
3708 case OFPUTIL_OFPST_AGGREGATE_REQUEST:
3709 return handle_aggregate_stats_request(ofconn, oh);
3711 case OFPUTIL_OFPST_TABLE_REQUEST:
3712 return handle_table_stats_request(ofconn, oh);
3714 case OFPUTIL_OFPST_PORT_REQUEST:
3715 return handle_port_stats_request(ofconn, oh);
3717 case OFPUTIL_OFPST_QUEUE_REQUEST:
3718 return handle_queue_stats_request(ofconn, oh);
3720 /* Nicira extension statistics requests. */
3721 case OFPUTIL_NXST_FLOW_REQUEST:
3722 return handle_nxst_flow(ofconn, oh);
3724 case OFPUTIL_NXST_AGGREGATE_REQUEST:
3725 return handle_nxst_aggregate(ofconn, oh);
3727 case OFPUTIL_INVALID:
3728 case OFPUTIL_OFPT_HELLO:
3729 case OFPUTIL_OFPT_ERROR:
3730 case OFPUTIL_OFPT_FEATURES_REPLY:
3731 case OFPUTIL_OFPT_GET_CONFIG_REPLY:
3732 case OFPUTIL_OFPT_PACKET_IN:
3733 case OFPUTIL_OFPT_FLOW_REMOVED:
3734 case OFPUTIL_OFPT_PORT_STATUS:
3735 case OFPUTIL_OFPT_BARRIER_REPLY:
3736 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REQUEST:
3737 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REPLY:
3738 case OFPUTIL_OFPST_DESC_REPLY:
3739 case OFPUTIL_OFPST_FLOW_REPLY:
3740 case OFPUTIL_OFPST_QUEUE_REPLY:
3741 case OFPUTIL_OFPST_PORT_REPLY:
3742 case OFPUTIL_OFPST_TABLE_REPLY:
3743 case OFPUTIL_OFPST_AGGREGATE_REPLY:
3744 case OFPUTIL_NXT_ROLE_REPLY:
3745 case OFPUTIL_NXT_FLOW_REMOVED:
3746 case OFPUTIL_NXST_FLOW_REPLY:
3747 case OFPUTIL_NXST_AGGREGATE_REPLY:
3749 if (VLOG_IS_WARN_ENABLED()) {
3750 char *s = ofp_to_string(oh, ntohs(oh->length), 2);
3751 VLOG_DBG_RL(&rl, "OpenFlow message ignored: %s", s);
3754 if (oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY) {
3755 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT);
3757 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
3763 handle_openflow(struct ofconn *ofconn, struct ofpbuf *ofp_msg)
3765 int error = handle_openflow__(ofconn, ofp_msg);
3767 send_error_oh(ofconn, ofp_msg->data, error);
3769 COVERAGE_INC(ofproto_recv_openflow);
3773 handle_miss_upcall(struct ofproto *p, struct dpif_upcall *upcall)
3775 struct facet *facet;
3778 /* Obtain in_port and tun_id, at least. */
3779 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
3781 /* Set header pointers in 'flow'. */
3782 flow_extract(upcall->packet, flow.tun_id, flow.in_port, &flow);
3784 if (cfm_should_process_flow(&flow)) {
3785 ofproto_process_cfm(p, &flow, upcall->packet);
3786 ofpbuf_delete(upcall->packet);
3788 } else if (p->ofhooks->special_cb
3789 && !p->ofhooks->special_cb(&flow, upcall->packet, p->aux)) {
3790 ofpbuf_delete(upcall->packet);
3794 /* Check with in-band control to see if this packet should be sent
3795 * to the local port regardless of the flow table. */
3796 if (connmgr_msg_in_hook(p->connmgr, &flow, upcall->packet)) {
3797 ofproto_send_packet(p, ODPP_LOCAL, 0, upcall->packet);
3800 facet = facet_lookup_valid(p, &flow);
3802 struct rule *rule = rule_lookup(p, &flow);
3804 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
3805 struct ofport *port = get_port(p, flow.in_port);
3807 if (port->opp.config & OFPPC_NO_PACKET_IN) {
3808 COVERAGE_INC(ofproto_no_packet_in);
3809 /* XXX install 'drop' flow entry */
3810 ofpbuf_delete(upcall->packet);
3814 VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16,
3818 COVERAGE_INC(ofproto_packet_in);
3819 send_packet_in(p, upcall, &flow, false);
3823 facet = facet_create(p, rule, &flow, upcall->packet);
3824 } else if (!facet->may_install) {
3825 /* The facet is not installable, that is, we need to process every
3826 * packet, so process the current packet's actions into 'facet'. */
3827 facet_make_actions(p, facet, upcall->packet);
3830 if (facet->rule->cr.priority == FAIL_OPEN_PRIORITY) {
3832 * Extra-special case for fail-open mode.
3834 * We are in fail-open mode and the packet matched the fail-open rule,
3835 * but we are connected to a controller too. We should send the packet
3836 * up to the controller in the hope that it will try to set up a flow
3837 * and thereby allow us to exit fail-open.
3839 * See the top-level comment in fail-open.c for more information.
3841 send_packet_in(p, upcall, &flow, true);
3844 facet_execute(p, facet, upcall->packet);
3845 facet_install(p, facet, false);
3849 handle_upcall(struct ofproto *p, struct dpif_upcall *upcall)
3853 switch (upcall->type) {
3854 case DPIF_UC_ACTION:
3855 COVERAGE_INC(ofproto_ctlr_action);
3856 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
3857 send_packet_in(p, upcall, &flow, false);
3860 case DPIF_UC_SAMPLE:
3862 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
3863 ofproto_sflow_received(p->sflow, upcall, &flow);
3865 ofpbuf_delete(upcall->packet);
3869 handle_miss_upcall(p, upcall);
3872 case DPIF_N_UC_TYPES:
3874 VLOG_WARN_RL(&rl, "upcall has unexpected type %"PRIu32, upcall->type);
3879 /* Flow expiration. */
3881 static int ofproto_dp_max_idle(const struct ofproto *);
3882 static void ofproto_update_stats(struct ofproto *);
3883 static void rule_expire(struct ofproto *, struct rule *);
3884 static void ofproto_expire_facets(struct ofproto *, int dp_max_idle);
3886 /* This function is called periodically by ofproto_run(). Its job is to
3887 * collect updates for the flows that have been installed into the datapath,
3888 * most importantly when they last were used, and then use that information to
3889 * expire flows that have not been used recently.
3891 * Returns the number of milliseconds after which it should be called again. */
3893 ofproto_expire(struct ofproto *ofproto)
3895 struct rule *rule, *next_rule;
3896 struct cls_cursor cursor;
3899 /* Update stats for each flow in the datapath. */
3900 ofproto_update_stats(ofproto);
3902 /* Expire facets that have been idle too long. */
3903 dp_max_idle = ofproto_dp_max_idle(ofproto);
3904 ofproto_expire_facets(ofproto, dp_max_idle);
3906 /* Expire OpenFlow flows whose idle_timeout or hard_timeout has passed. */
3907 cls_cursor_init(&cursor, &ofproto->cls, NULL);
3908 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
3909 rule_expire(ofproto, rule);
3912 /* Let the hook know that we're at a stable point: all outstanding data
3913 * in existing flows has been accounted to the account_cb. Thus, the
3914 * hook can now reasonably do operations that depend on having accurate
3915 * flow volume accounting (currently, that's just bond rebalancing). */
3916 if (ofproto->ofhooks->account_checkpoint_cb) {
3917 ofproto->ofhooks->account_checkpoint_cb(ofproto->aux);
3920 return MIN(dp_max_idle, 1000);
3923 /* Update 'packet_count', 'byte_count', and 'used' members of installed facets.
3925 * This function also pushes statistics updates to rules which each facet
3926 * resubmits into. Generally these statistics will be accurate. However, if a
3927 * facet changes the rule it resubmits into at some time in between
3928 * ofproto_update_stats() runs, it is possible that statistics accrued to the
3929 * old rule will be incorrectly attributed to the new rule. This could be
3930 * avoided by calling ofproto_update_stats() whenever rules are created or
3931 * deleted. However, the performance impact of making so many calls to the
3932 * datapath do not justify the benefit of having perfectly accurate statistics.
3935 ofproto_update_stats(struct ofproto *p)
3937 const struct dpif_flow_stats *stats;
3938 struct dpif_flow_dump dump;
3939 const struct nlattr *key;
3942 dpif_flow_dump_start(&dump, p->dpif);
3943 while (dpif_flow_dump_next(&dump, &key, &key_len, NULL, NULL, &stats)) {
3944 struct facet *facet;
3947 if (odp_flow_key_to_flow(key, key_len, &flow)) {
3951 odp_flow_key_format(key, key_len, &s);
3952 VLOG_WARN_RL(&rl, "failed to convert ODP flow key to flow: %s",
3958 facet = facet_find(p, &flow);
3960 if (facet && facet->installed) {
3962 if (stats->n_packets >= facet->dp_packet_count) {
3963 facet->packet_count += stats->n_packets - facet->dp_packet_count;
3965 VLOG_WARN_RL(&rl, "unexpected packet count from the datapath");
3968 if (stats->n_bytes >= facet->dp_byte_count) {
3969 facet->byte_count += stats->n_bytes - facet->dp_byte_count;
3971 VLOG_WARN_RL(&rl, "unexpected byte count from datapath");
3974 facet->dp_packet_count = stats->n_packets;
3975 facet->dp_byte_count = stats->n_bytes;
3977 facet_update_time(p, facet, stats->used);
3978 facet_account(p, facet, stats->n_bytes);
3979 facet_push_stats(p, facet);
3981 /* There's a flow in the datapath that we know nothing about.
3983 COVERAGE_INC(ofproto_unexpected_rule);
3984 dpif_flow_del(p->dpif, key, key_len, NULL);
3987 dpif_flow_dump_done(&dump);
3990 /* Calculates and returns the number of milliseconds of idle time after which
3991 * facets should expire from the datapath and we should fold their statistics
3992 * into their parent rules in userspace. */
3994 ofproto_dp_max_idle(const struct ofproto *ofproto)
3997 * Idle time histogram.
3999 * Most of the time a switch has a relatively small number of facets. When
4000 * this is the case we might as well keep statistics for all of them in
4001 * userspace and to cache them in the kernel datapath for performance as
4004 * As the number of facets increases, the memory required to maintain
4005 * statistics about them in userspace and in the kernel becomes
4006 * significant. However, with a large number of facets it is likely that
4007 * only a few of them are "heavy hitters" that consume a large amount of
4008 * bandwidth. At this point, only heavy hitters are worth caching in the
4009 * kernel and maintaining in userspaces; other facets we can discard.
4011 * The technique used to compute the idle time is to build a histogram with
4012 * N_BUCKETS buckets whose width is BUCKET_WIDTH msecs each. Each facet
4013 * that is installed in the kernel gets dropped in the appropriate bucket.
4014 * After the histogram has been built, we compute the cutoff so that only
4015 * the most-recently-used 1% of facets (but at least 1000 flows) are kept
4016 * cached. At least the most-recently-used bucket of facets is kept, so
4017 * actually an arbitrary number of facets can be kept in any given
4018 * expiration run (though the next run will delete most of those unless
4019 * they receive additional data).
4021 * This requires a second pass through the facets, in addition to the pass
4022 * made by ofproto_update_stats(), because the former function never looks
4023 * at uninstallable facets.
4025 enum { BUCKET_WIDTH = ROUND_UP(100, TIME_UPDATE_INTERVAL) };
4026 enum { N_BUCKETS = 5000 / BUCKET_WIDTH };
4027 int buckets[N_BUCKETS] = { 0 };
4028 struct facet *facet;
4033 total = hmap_count(&ofproto->facets);
4034 if (total <= 1000) {
4035 return N_BUCKETS * BUCKET_WIDTH;
4038 /* Build histogram. */
4040 HMAP_FOR_EACH (facet, hmap_node, &ofproto->facets) {
4041 long long int idle = now - facet->used;
4042 int bucket = (idle <= 0 ? 0
4043 : idle >= BUCKET_WIDTH * N_BUCKETS ? N_BUCKETS - 1
4044 : (unsigned int) idle / BUCKET_WIDTH);
4048 /* Find the first bucket whose flows should be expired. */
4049 for (bucket = 0; bucket < N_BUCKETS; bucket++) {
4050 if (buckets[bucket]) {
4053 subtotal += buckets[bucket++];
4054 } while (bucket < N_BUCKETS && subtotal < MAX(1000, total / 100));
4059 if (VLOG_IS_DBG_ENABLED()) {
4063 ds_put_cstr(&s, "keep");
4064 for (i = 0; i < N_BUCKETS; i++) {
4066 ds_put_cstr(&s, ", drop");
4069 ds_put_format(&s, " %d:%d", i * BUCKET_WIDTH, buckets[i]);
4072 VLOG_INFO("%s: %s (msec:count)",
4073 dpif_name(ofproto->dpif), ds_cstr(&s));
4077 return bucket * BUCKET_WIDTH;
4081 facet_active_timeout(struct ofproto *ofproto, struct facet *facet)
4083 if (ofproto->netflow && !facet_is_controller_flow(facet) &&
4084 netflow_active_timeout_expired(ofproto->netflow, &facet->nf_flow)) {
4085 struct ofexpired expired;
4087 if (facet->installed) {
4088 struct dpif_flow_stats stats;
4090 facet_put__(ofproto, facet, facet->actions, facet->actions_len,
4092 facet_update_stats(ofproto, facet, &stats);
4095 expired.flow = facet->flow;
4096 expired.packet_count = facet->packet_count;
4097 expired.byte_count = facet->byte_count;
4098 expired.used = facet->used;
4099 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
4104 ofproto_expire_facets(struct ofproto *ofproto, int dp_max_idle)
4106 long long int cutoff = time_msec() - dp_max_idle;
4107 struct facet *facet, *next_facet;
4109 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
4110 facet_active_timeout(ofproto, facet);
4111 if (facet->used < cutoff) {
4112 facet_remove(ofproto, facet);
4117 /* If 'rule' is an OpenFlow rule, that has expired according to OpenFlow rules,
4118 * then delete it entirely. */
4120 rule_expire(struct ofproto *ofproto, struct rule *rule)
4122 struct facet *facet, *next_facet;
4126 /* Has 'rule' expired? */
4128 if (rule->hard_timeout
4129 && now > rule->created + rule->hard_timeout * 1000) {
4130 reason = OFPRR_HARD_TIMEOUT;
4131 } else if (rule->idle_timeout && list_is_empty(&rule->facets)
4132 && now >rule->used + rule->idle_timeout * 1000) {
4133 reason = OFPRR_IDLE_TIMEOUT;
4138 COVERAGE_INC(ofproto_expired);
4140 /* Update stats. (This is a no-op if the rule expired due to an idle
4141 * timeout, because that only happens when the rule has no facets left.) */
4142 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
4143 facet_remove(ofproto, facet);
4146 /* Get rid of the rule. */
4147 if (!rule_is_hidden(rule)) {
4148 rule_send_removed(ofproto, rule, reason);
4150 rule_remove(ofproto, rule);
4154 rule_send_removed(struct ofproto *p, struct rule *rule, uint8_t reason)
4156 struct ofputil_flow_removed fr;
4158 if (!rule->send_flow_removed) {
4163 fr.cookie = rule->flow_cookie;
4165 calc_flow_duration__(rule->created, &fr.duration_sec, &fr.duration_nsec);
4166 fr.idle_timeout = rule->idle_timeout;
4167 fr.packet_count = rule->packet_count;
4168 fr.byte_count = rule->byte_count;
4170 connmgr_send_flow_removed(p->connmgr, &fr);
4173 /* Obtains statistics for 'rule' and stores them in '*packets' and '*bytes'.
4174 * The returned statistics include statistics for all of 'rule''s facets. */
4176 rule_get_stats(const struct rule *rule, uint64_t *packets, uint64_t *bytes)
4179 struct facet *facet;
4181 /* Start from historical data for 'rule' itself that are no longer tracked
4182 * in facets. This counts, for example, facets that have expired. */
4183 p = rule->packet_count;
4184 b = rule->byte_count;
4186 /* Add any statistics that are tracked by facets. This includes
4187 * statistical data recently updated by ofproto_update_stats() as well as
4188 * stats for packets that were executed "by hand" via dpif_execute(). */
4189 LIST_FOR_EACH (facet, list_node, &rule->facets) {
4190 p += facet->packet_count;
4191 b += facet->byte_count;
4198 /* Given 'upcall', of type DPIF_UC_ACTION or DPIF_UC_MISS, sends an
4199 * OFPT_PACKET_IN message to each OpenFlow controller as necessary according to
4200 * their individual configurations.
4202 * If 'clone' is true, the caller retains ownership of 'upcall->packet'.
4203 * Otherwise, ownership is transferred to this function. */
4205 send_packet_in(struct ofproto *ofproto, struct dpif_upcall *upcall,
4206 const struct flow *flow, bool clone)
4208 connmgr_send_packet_in(ofproto->connmgr, upcall, flow,
4209 clone ? NULL : upcall->packet);
4213 pick_datapath_id(const struct ofproto *ofproto)
4215 const struct ofport *port;
4217 port = get_port(ofproto, ODPP_LOCAL);
4219 uint8_t ea[ETH_ADDR_LEN];
4222 error = netdev_get_etheraddr(port->netdev, ea);
4224 return eth_addr_to_uint64(ea);
4226 VLOG_WARN("could not get MAC address for %s (%s)",
4227 netdev_get_name(port->netdev), strerror(error));
4229 return ofproto->fallback_dpid;
4233 pick_fallback_dpid(void)
4235 uint8_t ea[ETH_ADDR_LEN];
4236 eth_addr_nicira_random(ea);
4237 return eth_addr_to_uint64(ea);
4241 ofproto_unixctl_list(struct unixctl_conn *conn, const char *arg OVS_UNUSED,
4242 void *aux OVS_UNUSED)
4244 const struct shash_node *node;
4248 SHASH_FOR_EACH (node, &all_ofprotos) {
4249 ds_put_format(&results, "%s\n", node->name);
4251 unixctl_command_reply(conn, 200, ds_cstr(&results));
4252 ds_destroy(&results);
4255 struct ofproto_trace {
4256 struct action_xlate_ctx ctx;
4262 trace_format_rule(struct ds *result, int level, const struct rule *rule)
4264 ds_put_char_multiple(result, '\t', level);
4266 ds_put_cstr(result, "No match\n");
4270 ds_put_format(result, "Rule: cookie=%#"PRIx64" ",
4271 ntohll(rule->flow_cookie));
4272 cls_rule_format(&rule->cr, result);
4273 ds_put_char(result, '\n');
4275 ds_put_char_multiple(result, '\t', level);
4276 ds_put_cstr(result, "OpenFlow ");
4277 ofp_print_actions(result, (const struct ofp_action_header *) rule->actions,
4278 rule->n_actions * sizeof *rule->actions);
4279 ds_put_char(result, '\n');
4283 trace_format_flow(struct ds *result, int level, const char *title,
4284 struct ofproto_trace *trace)
4286 ds_put_char_multiple(result, '\t', level);
4287 ds_put_format(result, "%s: ", title);
4288 if (flow_equal(&trace->ctx.flow, &trace->flow)) {
4289 ds_put_cstr(result, "unchanged");
4291 flow_format(result, &trace->ctx.flow);
4292 trace->flow = trace->ctx.flow;
4294 ds_put_char(result, '\n');
4298 trace_resubmit(struct action_xlate_ctx *ctx, struct rule *rule)
4300 struct ofproto_trace *trace = CONTAINER_OF(ctx, struct ofproto_trace, ctx);
4301 struct ds *result = trace->result;
4303 ds_put_char(result, '\n');
4304 trace_format_flow(result, ctx->recurse + 1, "Resubmitted flow", trace);
4305 trace_format_rule(result, ctx->recurse + 1, rule);
4309 ofproto_unixctl_trace(struct unixctl_conn *conn, const char *args_,
4310 void *aux OVS_UNUSED)
4312 char *dpname, *in_port_s, *tun_id_s, *packet_s;
4313 char *args = xstrdup(args_);
4314 char *save_ptr = NULL;
4315 struct ofproto *ofproto;
4316 struct ofpbuf packet;
4324 ofpbuf_init(&packet, strlen(args) / 2);
4327 dpname = strtok_r(args, " ", &save_ptr);
4328 tun_id_s = strtok_r(NULL, " ", &save_ptr);
4329 in_port_s = strtok_r(NULL, " ", &save_ptr);
4330 packet_s = strtok_r(NULL, "", &save_ptr); /* Get entire rest of line. */
4331 if (!dpname || !in_port_s || !packet_s) {
4332 unixctl_command_reply(conn, 501, "Bad command syntax");
4336 ofproto = shash_find_data(&all_ofprotos, dpname);
4338 unixctl_command_reply(conn, 501, "Unknown ofproto (use ofproto/list "
4343 tun_id = htonll(strtoull(tun_id_s, NULL, 0));
4344 in_port = ofp_port_to_odp_port(atoi(in_port_s));
4346 packet_s = ofpbuf_put_hex(&packet, packet_s, NULL);
4347 packet_s += strspn(packet_s, " ");
4348 if (*packet_s != '\0') {
4349 unixctl_command_reply(conn, 501, "Trailing garbage in command");
4352 if (packet.size < ETH_HEADER_LEN) {
4353 unixctl_command_reply(conn, 501, "Packet data too short for Ethernet");
4357 ds_put_cstr(&result, "Packet: ");
4358 s = ofp_packet_to_string(packet.data, packet.size, packet.size);
4359 ds_put_cstr(&result, s);
4362 flow_extract(&packet, tun_id, in_port, &flow);
4363 ds_put_cstr(&result, "Flow: ");
4364 flow_format(&result, &flow);
4365 ds_put_char(&result, '\n');
4367 rule = rule_lookup(ofproto, &flow);
4368 trace_format_rule(&result, 0, rule);
4370 struct ofproto_trace trace;
4371 struct ofpbuf *odp_actions;
4373 trace.result = &result;
4375 action_xlate_ctx_init(&trace.ctx, ofproto, &flow, &packet);
4376 trace.ctx.resubmit_hook = trace_resubmit;
4377 odp_actions = xlate_actions(&trace.ctx,
4378 rule->actions, rule->n_actions);
4380 ds_put_char(&result, '\n');
4381 trace_format_flow(&result, 0, "Final flow", &trace);
4382 ds_put_cstr(&result, "Datapath actions: ");
4383 format_odp_actions(&result, odp_actions->data, odp_actions->size);
4384 ofpbuf_delete(odp_actions);
4387 unixctl_command_reply(conn, 200, ds_cstr(&result));
4390 ds_destroy(&result);
4391 ofpbuf_uninit(&packet);
4396 ofproto_unixctl_init(void)
4398 static bool registered;
4404 unixctl_command_register("ofproto/list", ofproto_unixctl_list, NULL);
4405 unixctl_command_register("ofproto/trace", ofproto_unixctl_trace, NULL);
4409 default_normal_ofhook_cb(const struct flow *flow, const struct ofpbuf *packet,
4410 struct ofpbuf *odp_actions, tag_type *tags,
4411 uint16_t *nf_output_iface, void *ofproto_)
4413 struct ofproto *ofproto = ofproto_;
4414 struct mac_entry *dst_mac;
4416 /* Drop frames for reserved multicast addresses. */
4417 if (eth_addr_is_reserved(flow->dl_dst)) {
4421 /* Learn source MAC (but don't try to learn from revalidation). */
4423 && mac_learning_may_learn(ofproto->ml, flow->dl_src, 0)) {
4424 struct mac_entry *src_mac;
4426 src_mac = mac_learning_insert(ofproto->ml, flow->dl_src, 0);
4427 if (mac_entry_is_new(src_mac) || src_mac->port.i != flow->in_port) {
4428 /* The log messages here could actually be useful in debugging,
4429 * so keep the rate limit relatively high. */
4430 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
4431 VLOG_DBG_RL(&rl, "learned that "ETH_ADDR_FMT" is on port %"PRIu16,
4432 ETH_ADDR_ARGS(flow->dl_src), flow->in_port);
4434 ofproto_revalidate(ofproto,
4435 mac_learning_changed(ofproto->ml, src_mac));
4436 src_mac->port.i = flow->in_port;
4440 /* Determine output port. */
4441 dst_mac = mac_learning_lookup(ofproto->ml, flow->dl_dst, 0, tags);
4443 flood_packets(ofproto, flow->in_port, OFPPC_NO_FLOOD,
4444 nf_output_iface, odp_actions);
4446 int out_port = dst_mac->port.i;
4447 if (out_port != flow->in_port) {
4448 nl_msg_put_u32(odp_actions, ODP_ACTION_ATTR_OUTPUT, out_port);
4449 *nf_output_iface = out_port;
4458 static const struct ofhooks default_ofhooks = {
4459 default_normal_ofhook_cb,