2 * Copyright (c) 2009, 2010 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
22 #include <netinet/in.h>
25 #include "classifier.h"
27 #include "discovery.h"
29 #include "dynamic-string.h"
30 #include "fail-open.h"
32 #include "mac-learning.h"
36 #include "ofp-print.h"
37 #include "ofproto-sflow.h"
39 #include "openflow/nicira-ext.h"
40 #include "openflow/openflow.h"
41 #include "openvswitch/datapath-protocol.h"
45 #include "poll-loop.h"
46 #include "port-array.h"
51 #include "stream-ssl.h"
59 #define THIS_MODULE VLM_ofproto
62 #include "sflow_api.h"
66 TABLEID_CLASSIFIER = 1
70 struct netdev *netdev;
71 struct ofp_phy_port opp; /* In host byte order. */
74 static void ofport_free(struct ofport *);
75 static void hton_ofp_phy_port(struct ofp_phy_port *);
77 static int xlate_actions(const union ofp_action *in, size_t n_in,
78 const flow_t *flow, struct ofproto *ofproto,
79 const struct ofpbuf *packet,
80 struct odp_actions *out, tag_type *tags,
81 bool *may_set_up_flow, uint16_t *nf_output_iface);
86 uint64_t flow_cookie; /* Controller-issued identifier.
87 (Kept in network-byte order.) */
88 uint16_t idle_timeout; /* In seconds from time of last use. */
89 uint16_t hard_timeout; /* In seconds from time of creation. */
90 bool send_flow_removed; /* Send a flow removed message? */
91 long long int used; /* Last-used time (0 if never used). */
92 long long int created; /* Creation time. */
93 uint64_t packet_count; /* Number of packets received. */
94 uint64_t byte_count; /* Number of bytes received. */
95 uint64_t accounted_bytes; /* Number of bytes passed to account_cb. */
96 tag_type tags; /* Tags (set only by hooks). */
97 struct netflow_flow nf_flow; /* Per-flow NetFlow tracking data. */
99 /* If 'super' is non-NULL, this rule is a subrule, that is, it is an
100 * exact-match rule (having cr.wc.wildcards of 0) generated from the
101 * wildcard rule 'super'. In this case, 'list' is an element of the
104 * If 'super' is NULL, this rule is a super-rule, and 'list' is the head of
105 * a list of subrules. A super-rule with no wildcards (where
106 * cr.wc.wildcards is 0) will never have any subrules. */
112 * 'n_actions' is the number of elements in the 'actions' array. A single
113 * action may take up more more than one element's worth of space.
115 * A subrule has no actions (it uses the super-rule's actions). */
117 union ofp_action *actions;
121 * A super-rule with wildcard fields never has ODP actions (since the
122 * datapath only supports exact-match flows). */
123 bool installed; /* Installed in datapath? */
124 bool may_install; /* True ordinarily; false if actions must
125 * be reassessed for every packet. */
127 union odp_action *odp_actions;
131 rule_is_hidden(const struct rule *rule)
133 /* Subrules are merely an implementation detail, so hide them from the
135 if (rule->super != NULL) {
139 /* Rules with priority higher than UINT16_MAX are set up by ofproto itself
140 * (e.g. by in-band control) and are intentionally hidden from the
142 if (rule->cr.priority > UINT16_MAX) {
149 static struct rule *rule_create(struct ofproto *, struct rule *super,
150 const union ofp_action *, size_t n_actions,
151 uint16_t idle_timeout, uint16_t hard_timeout,
152 uint64_t flow_cookie, bool send_flow_removed);
153 static void rule_free(struct rule *);
154 static void rule_destroy(struct ofproto *, struct rule *);
155 static struct rule *rule_from_cls_rule(const struct cls_rule *);
156 static void rule_insert(struct ofproto *, struct rule *,
157 struct ofpbuf *packet, uint16_t in_port);
158 static void rule_remove(struct ofproto *, struct rule *);
159 static bool rule_make_actions(struct ofproto *, struct rule *,
160 const struct ofpbuf *packet);
161 static void rule_install(struct ofproto *, struct rule *,
162 struct rule *displaced_rule);
163 static void rule_uninstall(struct ofproto *, struct rule *);
164 static void rule_post_uninstall(struct ofproto *, struct rule *);
165 static void send_flow_removed(struct ofproto *p, struct rule *rule,
166 long long int now, uint8_t reason);
171 struct pktbuf *pktbuf;
174 struct rconn_packet_counter *packet_in_counter;
176 /* Number of OpenFlow messages queued as replies to OpenFlow requests, and
177 * the maximum number before we stop reading OpenFlow requests. */
178 #define OFCONN_REPLY_MAX 100
179 struct rconn_packet_counter *reply_counter;
182 static struct ofconn *ofconn_create(struct ofproto *, struct rconn *);
183 static void ofconn_destroy(struct ofconn *);
184 static void ofconn_run(struct ofconn *, struct ofproto *);
185 static void ofconn_wait(struct ofconn *);
186 static void queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
187 struct rconn_packet_counter *counter);
191 uint64_t datapath_id; /* Datapath ID. */
192 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
193 char *mfr_desc; /* Manufacturer. */
194 char *hw_desc; /* Hardware. */
195 char *sw_desc; /* Software version. */
196 char *serial_desc; /* Serial number. */
197 char *dp_desc; /* Datapath description. */
201 struct netdev_monitor *netdev_monitor;
202 struct port_array ports; /* Index is ODP port nr; ofport->opp.port_no is
204 struct shash port_by_name;
208 struct switch_status *switch_status;
209 struct status_category *ss_cat;
210 struct in_band *in_band;
211 struct discovery *discovery;
212 struct fail_open *fail_open;
213 struct pinsched *miss_sched, *action_sched;
214 struct netflow *netflow;
215 struct ofproto_sflow *sflow;
218 struct classifier cls;
219 bool need_revalidate;
220 long long int next_expiration;
221 struct tag_set revalidate_set;
222 bool tun_id_from_cookie;
224 /* OpenFlow connections. */
225 struct list all_conns;
226 struct ofconn *controller;
227 struct pvconn **listeners;
229 struct pvconn **snoops;
232 /* Hooks for ovs-vswitchd. */
233 const struct ofhooks *ofhooks;
236 /* Used by default ofhooks. */
237 struct mac_learning *ml;
240 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
242 static const struct ofhooks default_ofhooks;
244 static uint64_t pick_datapath_id(const struct ofproto *);
245 static uint64_t pick_fallback_dpid(void);
246 static void send_packet_in_miss(struct ofpbuf *, void *ofproto);
247 static void send_packet_in_action(struct ofpbuf *, void *ofproto);
248 static void update_used(struct ofproto *);
249 static void update_stats(struct ofproto *, struct rule *,
250 const struct odp_flow_stats *);
251 static void expire_rule(struct cls_rule *, void *ofproto);
252 static void active_timeout(struct ofproto *ofproto, struct rule *rule);
253 static bool revalidate_rule(struct ofproto *p, struct rule *rule);
254 static void revalidate_cb(struct cls_rule *rule_, void *p_);
256 static void handle_odp_msg(struct ofproto *, struct ofpbuf *);
258 static void handle_openflow(struct ofconn *, struct ofproto *,
261 static void refresh_port_groups(struct ofproto *);
263 static void update_port(struct ofproto *, const char *devname);
264 static int init_ports(struct ofproto *);
265 static void reinit_ports(struct ofproto *);
268 ofproto_create(const char *datapath, const char *datapath_type,
269 const struct ofhooks *ofhooks, void *aux,
270 struct ofproto **ofprotop)
272 struct odp_stats stats;
279 /* Connect to datapath and start listening for messages. */
280 error = dpif_open(datapath, datapath_type, &dpif);
282 VLOG_ERR("failed to open datapath %s: %s", datapath, strerror(error));
285 error = dpif_get_dp_stats(dpif, &stats);
287 VLOG_ERR("failed to obtain stats for datapath %s: %s",
288 datapath, strerror(error));
292 error = dpif_recv_set_mask(dpif, ODPL_MISS | ODPL_ACTION | ODPL_SFLOW);
294 VLOG_ERR("failed to listen on datapath %s: %s",
295 datapath, strerror(error));
299 dpif_flow_flush(dpif);
300 dpif_recv_purge(dpif);
302 /* Initialize settings. */
303 p = xzalloc(sizeof *p);
304 p->fallback_dpid = pick_fallback_dpid();
305 p->datapath_id = p->fallback_dpid;
306 p->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
307 p->hw_desc = xstrdup(DEFAULT_HW_DESC);
308 p->sw_desc = xstrdup(DEFAULT_SW_DESC);
309 p->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
310 p->dp_desc = xstrdup(DEFAULT_DP_DESC);
312 /* Initialize datapath. */
314 p->netdev_monitor = netdev_monitor_create();
315 port_array_init(&p->ports);
316 shash_init(&p->port_by_name);
317 p->max_ports = stats.max_ports;
319 /* Initialize submodules. */
320 p->switch_status = switch_status_create(p);
324 p->miss_sched = p->action_sched = NULL;
328 /* Initialize flow table. */
329 classifier_init(&p->cls);
330 p->need_revalidate = false;
331 p->next_expiration = time_msec() + 1000;
332 tag_set_init(&p->revalidate_set);
334 /* Initialize OpenFlow connections. */
335 list_init(&p->all_conns);
336 p->controller = ofconn_create(p, rconn_create(5, 8));
337 p->controller->pktbuf = pktbuf_create();
338 p->controller->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN;
344 /* Initialize hooks. */
346 p->ofhooks = ofhooks;
350 p->ofhooks = &default_ofhooks;
352 p->ml = mac_learning_create();
355 /* Register switch status category. */
356 p->ss_cat = switch_status_register(p->switch_status, "remote",
357 rconn_status_cb, p->controller->rconn);
359 /* Pick final datapath ID. */
360 p->datapath_id = pick_datapath_id(p);
361 VLOG_INFO("using datapath ID %016"PRIx64, p->datapath_id);
368 ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id)
370 uint64_t old_dpid = p->datapath_id;
371 p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p);
372 if (p->datapath_id != old_dpid) {
373 VLOG_INFO("datapath ID changed to %016"PRIx64, p->datapath_id);
374 rconn_reconnect(p->controller->rconn);
379 ofproto_set_probe_interval(struct ofproto *p, int probe_interval)
381 probe_interval = probe_interval ? MAX(probe_interval, 5) : 0;
382 rconn_set_probe_interval(p->controller->rconn, probe_interval);
384 int trigger_duration = probe_interval ? probe_interval * 3 : 15;
385 fail_open_set_trigger_duration(p->fail_open, trigger_duration);
390 ofproto_set_max_backoff(struct ofproto *p, int max_backoff)
392 rconn_set_max_backoff(p->controller->rconn, max_backoff);
396 ofproto_set_desc(struct ofproto *p,
397 const char *mfr_desc, const char *hw_desc,
398 const char *sw_desc, const char *serial_desc,
401 struct ofp_desc_stats *ods;
404 if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
405 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
406 sizeof ods->mfr_desc);
409 p->mfr_desc = xstrdup(mfr_desc);
412 if (strlen(hw_desc) >= sizeof ods->hw_desc) {
413 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
414 sizeof ods->hw_desc);
417 p->hw_desc = xstrdup(hw_desc);
420 if (strlen(sw_desc) >= sizeof ods->sw_desc) {
421 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
422 sizeof ods->sw_desc);
425 p->sw_desc = xstrdup(sw_desc);
428 if (strlen(serial_desc) >= sizeof ods->serial_num) {
429 VLOG_WARN("truncating serial_desc, must be less than %zu "
431 sizeof ods->serial_num);
433 free(p->serial_desc);
434 p->serial_desc = xstrdup(serial_desc);
437 if (strlen(dp_desc) >= sizeof ods->dp_desc) {
438 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
439 sizeof ods->dp_desc);
442 p->dp_desc = xstrdup(dp_desc);
447 ofproto_set_in_band(struct ofproto *p, bool in_band)
449 if (in_band != (p->in_band != NULL)) {
451 return in_band_create(p, p->dpif, p->switch_status,
452 p->controller->rconn, &p->in_band);
454 ofproto_set_discovery(p, false, NULL, true);
455 in_band_destroy(p->in_band);
458 rconn_reconnect(p->controller->rconn);
464 ofproto_set_discovery(struct ofproto *p, bool discovery,
465 const char *re, bool update_resolv_conf)
467 if (discovery != (p->discovery != NULL)) {
469 int error = ofproto_set_in_band(p, true);
473 error = discovery_create(re, update_resolv_conf,
474 p->dpif, p->switch_status,
480 discovery_destroy(p->discovery);
483 rconn_disconnect(p->controller->rconn);
484 } else if (discovery) {
485 discovery_set_update_resolv_conf(p->discovery, update_resolv_conf);
486 return discovery_set_accept_controller_re(p->discovery, re);
492 ofproto_set_controller(struct ofproto *ofproto, const char *controller)
494 if (ofproto->discovery) {
496 } else if (controller) {
497 if (strcmp(rconn_get_name(ofproto->controller->rconn), controller)) {
498 return rconn_connect(ofproto->controller->rconn, controller);
503 rconn_disconnect(ofproto->controller->rconn);
509 set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
510 const struct svec *svec)
512 struct pvconn **pvconns = *pvconnsp;
513 size_t n_pvconns = *n_pvconnsp;
517 for (i = 0; i < n_pvconns; i++) {
518 pvconn_close(pvconns[i]);
522 pvconns = xmalloc(svec->n * sizeof *pvconns);
524 for (i = 0; i < svec->n; i++) {
525 const char *name = svec->names[i];
526 struct pvconn *pvconn;
529 error = pvconn_open(name, &pvconn);
531 pvconns[n_pvconns++] = pvconn;
533 VLOG_ERR("failed to listen on %s: %s", name, strerror(error));
541 *n_pvconnsp = n_pvconns;
547 ofproto_set_listeners(struct ofproto *ofproto, const struct svec *listeners)
549 return set_pvconns(&ofproto->listeners, &ofproto->n_listeners, listeners);
553 ofproto_set_snoops(struct ofproto *ofproto, const struct svec *snoops)
555 return set_pvconns(&ofproto->snoops, &ofproto->n_snoops, snoops);
559 ofproto_set_netflow(struct ofproto *ofproto,
560 const struct netflow_options *nf_options)
562 if (nf_options && nf_options->collectors.n) {
563 if (!ofproto->netflow) {
564 ofproto->netflow = netflow_create();
566 return netflow_set_options(ofproto->netflow, nf_options);
568 netflow_destroy(ofproto->netflow);
569 ofproto->netflow = NULL;
575 ofproto_set_sflow(struct ofproto *ofproto,
576 const struct ofproto_sflow_options *oso)
578 struct ofproto_sflow *os = ofproto->sflow;
581 struct ofport *ofport;
582 unsigned int odp_port;
584 os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
585 refresh_port_groups(ofproto);
586 PORT_ARRAY_FOR_EACH (ofport, &ofproto->ports, odp_port) {
587 ofproto_sflow_add_port(os, odp_port,
588 netdev_get_name(ofport->netdev));
591 ofproto_sflow_set_options(os, oso);
593 ofproto_sflow_destroy(os);
594 ofproto->sflow = NULL;
599 ofproto_set_failure(struct ofproto *ofproto, bool fail_open)
602 struct rconn *rconn = ofproto->controller->rconn;
603 int trigger_duration = rconn_get_probe_interval(rconn) * 3;
604 if (!ofproto->fail_open) {
605 ofproto->fail_open = fail_open_create(ofproto, trigger_duration,
606 ofproto->switch_status,
609 fail_open_set_trigger_duration(ofproto->fail_open,
613 fail_open_destroy(ofproto->fail_open);
614 ofproto->fail_open = NULL;
619 ofproto_set_rate_limit(struct ofproto *ofproto,
620 int rate_limit, int burst_limit)
622 if (rate_limit > 0) {
623 if (!ofproto->miss_sched) {
624 ofproto->miss_sched = pinsched_create(rate_limit, burst_limit,
625 ofproto->switch_status);
626 ofproto->action_sched = pinsched_create(rate_limit, burst_limit,
629 pinsched_set_limits(ofproto->miss_sched, rate_limit, burst_limit);
630 pinsched_set_limits(ofproto->action_sched,
631 rate_limit, burst_limit);
634 pinsched_destroy(ofproto->miss_sched);
635 ofproto->miss_sched = NULL;
636 pinsched_destroy(ofproto->action_sched);
637 ofproto->action_sched = NULL;
642 ofproto_set_stp(struct ofproto *ofproto OVS_UNUSED, bool enable_stp)
646 VLOG_WARN("STP is not yet implemented");
654 ofproto_get_datapath_id(const struct ofproto *ofproto)
656 return ofproto->datapath_id;
660 ofproto_get_probe_interval(const struct ofproto *ofproto)
662 return rconn_get_probe_interval(ofproto->controller->rconn);
666 ofproto_get_max_backoff(const struct ofproto *ofproto)
668 return rconn_get_max_backoff(ofproto->controller->rconn);
672 ofproto_get_in_band(const struct ofproto *ofproto)
674 return ofproto->in_band != NULL;
678 ofproto_get_discovery(const struct ofproto *ofproto)
680 return ofproto->discovery != NULL;
684 ofproto_get_controller(const struct ofproto *ofproto)
686 return rconn_get_name(ofproto->controller->rconn);
690 ofproto_get_listeners(const struct ofproto *ofproto, struct svec *listeners)
694 for (i = 0; i < ofproto->n_listeners; i++) {
695 svec_add(listeners, pvconn_get_name(ofproto->listeners[i]));
700 ofproto_get_snoops(const struct ofproto *ofproto, struct svec *snoops)
704 for (i = 0; i < ofproto->n_snoops; i++) {
705 svec_add(snoops, pvconn_get_name(ofproto->snoops[i]));
710 ofproto_destroy(struct ofproto *p)
712 struct ofconn *ofconn, *next_ofconn;
713 struct ofport *ofport;
714 unsigned int port_no;
721 /* Destroy fail-open early, because it touches the classifier. */
722 ofproto_set_failure(p, false);
724 ofproto_flush_flows(p);
725 classifier_destroy(&p->cls);
727 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, struct ofconn, node,
729 ofconn_destroy(ofconn);
733 netdev_monitor_destroy(p->netdev_monitor);
734 PORT_ARRAY_FOR_EACH (ofport, &p->ports, port_no) {
737 shash_destroy(&p->port_by_name);
739 switch_status_destroy(p->switch_status);
740 in_band_destroy(p->in_band);
741 discovery_destroy(p->discovery);
742 pinsched_destroy(p->miss_sched);
743 pinsched_destroy(p->action_sched);
744 netflow_destroy(p->netflow);
745 ofproto_sflow_destroy(p->sflow);
747 switch_status_unregister(p->ss_cat);
749 for (i = 0; i < p->n_listeners; i++) {
750 pvconn_close(p->listeners[i]);
754 for (i = 0; i < p->n_snoops; i++) {
755 pvconn_close(p->snoops[i]);
759 mac_learning_destroy(p->ml);
764 free(p->serial_desc);
767 port_array_destroy(&p->ports);
773 ofproto_run(struct ofproto *p)
775 int error = ofproto_run1(p);
777 error = ofproto_run2(p, false);
783 process_port_change(struct ofproto *ofproto, int error, char *devname)
785 if (error == ENOBUFS) {
786 reinit_ports(ofproto);
788 update_port(ofproto, devname);
794 ofproto_run1(struct ofproto *p)
796 struct ofconn *ofconn, *next_ofconn;
801 if (shash_is_empty(&p->port_by_name)) {
805 for (i = 0; i < 50; i++) {
809 error = dpif_recv(p->dpif, &buf);
811 if (error == ENODEV) {
812 /* Someone destroyed the datapath behind our back. The caller
813 * better destroy us and give up, because we're just going to
814 * spin from here on out. */
815 static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5);
816 VLOG_ERR_RL(&rl2, "%s: datapath was destroyed externally",
823 handle_odp_msg(p, buf);
826 while ((error = dpif_port_poll(p->dpif, &devname)) != EAGAIN) {
827 process_port_change(p, error, devname);
829 while ((error = netdev_monitor_poll(p->netdev_monitor,
830 &devname)) != EAGAIN) {
831 process_port_change(p, error, devname);
835 in_band_run(p->in_band);
838 char *controller_name;
839 if (rconn_is_connectivity_questionable(p->controller->rconn)) {
840 discovery_question_connectivity(p->discovery);
842 if (discovery_run(p->discovery, &controller_name)) {
843 if (controller_name) {
844 rconn_connect(p->controller->rconn, controller_name);
846 rconn_disconnect(p->controller->rconn);
850 pinsched_run(p->miss_sched, send_packet_in_miss, p);
851 pinsched_run(p->action_sched, send_packet_in_action, p);
853 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, struct ofconn, node,
855 ofconn_run(ofconn, p);
858 /* Fail-open maintenance. Do this after processing the ofconns since
859 * fail-open checks the status of the controller rconn. */
861 fail_open_run(p->fail_open);
864 for (i = 0; i < p->n_listeners; i++) {
868 retval = pvconn_accept(p->listeners[i], OFP_VERSION, &vconn);
870 ofconn_create(p, rconn_new_from_vconn("passive", vconn));
871 } else if (retval != EAGAIN) {
872 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
876 for (i = 0; i < p->n_snoops; i++) {
880 retval = pvconn_accept(p->snoops[i], OFP_VERSION, &vconn);
882 rconn_add_monitor(p->controller->rconn, vconn);
883 } else if (retval != EAGAIN) {
884 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
888 if (time_msec() >= p->next_expiration) {
889 COVERAGE_INC(ofproto_expiration);
890 p->next_expiration = time_msec() + 1000;
893 classifier_for_each(&p->cls, CLS_INC_ALL, expire_rule, p);
895 /* Let the hook know that we're at a stable point: all outstanding data
896 * in existing flows has been accounted to the account_cb. Thus, the
897 * hook can now reasonably do operations that depend on having accurate
898 * flow volume accounting (currently, that's just bond rebalancing). */
899 if (p->ofhooks->account_checkpoint_cb) {
900 p->ofhooks->account_checkpoint_cb(p->aux);
905 netflow_run(p->netflow);
908 ofproto_sflow_run(p->sflow);
914 struct revalidate_cbdata {
915 struct ofproto *ofproto;
916 bool revalidate_all; /* Revalidate all exact-match rules? */
917 bool revalidate_subrules; /* Revalidate all exact-match subrules? */
918 struct tag_set revalidate_set; /* Set of tags to revalidate. */
922 ofproto_run2(struct ofproto *p, bool revalidate_all)
924 if (p->need_revalidate || revalidate_all
925 || !tag_set_is_empty(&p->revalidate_set)) {
926 struct revalidate_cbdata cbdata;
928 cbdata.revalidate_all = revalidate_all;
929 cbdata.revalidate_subrules = p->need_revalidate;
930 cbdata.revalidate_set = p->revalidate_set;
931 tag_set_init(&p->revalidate_set);
932 COVERAGE_INC(ofproto_revalidate);
933 classifier_for_each(&p->cls, CLS_INC_EXACT, revalidate_cb, &cbdata);
934 p->need_revalidate = false;
941 ofproto_wait(struct ofproto *p)
943 struct ofconn *ofconn;
946 dpif_recv_wait(p->dpif);
947 dpif_port_poll_wait(p->dpif);
948 netdev_monitor_poll_wait(p->netdev_monitor);
949 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
953 in_band_wait(p->in_band);
956 discovery_wait(p->discovery);
959 fail_open_wait(p->fail_open);
961 pinsched_wait(p->miss_sched);
962 pinsched_wait(p->action_sched);
964 ofproto_sflow_wait(p->sflow);
966 if (!tag_set_is_empty(&p->revalidate_set)) {
967 poll_immediate_wake();
969 if (p->need_revalidate) {
970 /* Shouldn't happen, but if it does just go around again. */
971 VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
972 poll_immediate_wake();
973 } else if (p->next_expiration != LLONG_MAX) {
974 poll_timer_wait(p->next_expiration - time_msec());
976 for (i = 0; i < p->n_listeners; i++) {
977 pvconn_wait(p->listeners[i]);
979 for (i = 0; i < p->n_snoops; i++) {
980 pvconn_wait(p->snoops[i]);
985 ofproto_revalidate(struct ofproto *ofproto, tag_type tag)
987 tag_set_add(&ofproto->revalidate_set, tag);
991 ofproto_get_revalidate_set(struct ofproto *ofproto)
993 return &ofproto->revalidate_set;
997 ofproto_is_alive(const struct ofproto *p)
999 return p->discovery || rconn_is_alive(p->controller->rconn);
1003 ofproto_send_packet(struct ofproto *p, const flow_t *flow,
1004 const union ofp_action *actions, size_t n_actions,
1005 const struct ofpbuf *packet)
1007 struct odp_actions odp_actions;
1010 error = xlate_actions(actions, n_actions, flow, p, packet, &odp_actions,
1016 /* XXX Should we translate the dpif_execute() errno value into an OpenFlow
1018 dpif_execute(p->dpif, flow->in_port, odp_actions.actions,
1019 odp_actions.n_actions, packet);
1024 ofproto_add_flow(struct ofproto *p,
1025 const flow_t *flow, uint32_t wildcards, unsigned int priority,
1026 const union ofp_action *actions, size_t n_actions,
1030 rule = rule_create(p, NULL, actions, n_actions,
1031 idle_timeout >= 0 ? idle_timeout : 5 /* XXX */,
1033 cls_rule_from_flow(flow, wildcards, priority, &rule->cr);
1034 rule_insert(p, rule, NULL, 0);
1038 ofproto_delete_flow(struct ofproto *ofproto, const flow_t *flow,
1039 uint32_t wildcards, unsigned int priority)
1043 rule = rule_from_cls_rule(classifier_find_rule_exactly(&ofproto->cls,
1047 rule_remove(ofproto, rule);
1052 destroy_rule(struct cls_rule *rule_, void *ofproto_)
1054 struct rule *rule = rule_from_cls_rule(rule_);
1055 struct ofproto *ofproto = ofproto_;
1057 /* Mark the flow as not installed, even though it might really be
1058 * installed, so that rule_remove() doesn't bother trying to uninstall it.
1059 * There is no point in uninstalling it individually since we are about to
1060 * blow away all the flows with dpif_flow_flush(). */
1061 rule->installed = false;
1063 rule_remove(ofproto, rule);
1067 ofproto_flush_flows(struct ofproto *ofproto)
1069 COVERAGE_INC(ofproto_flush);
1070 classifier_for_each(&ofproto->cls, CLS_INC_ALL, destroy_rule, ofproto);
1071 dpif_flow_flush(ofproto->dpif);
1072 if (ofproto->in_band) {
1073 in_band_flushed(ofproto->in_band);
1075 if (ofproto->fail_open) {
1076 fail_open_flushed(ofproto->fail_open);
1081 reinit_ports(struct ofproto *p)
1083 struct svec devnames;
1084 struct ofport *ofport;
1085 unsigned int port_no;
1086 struct odp_port *odp_ports;
1090 svec_init(&devnames);
1091 PORT_ARRAY_FOR_EACH (ofport, &p->ports, port_no) {
1092 svec_add (&devnames, (char *) ofport->opp.name);
1094 dpif_port_list(p->dpif, &odp_ports, &n_odp_ports);
1095 for (i = 0; i < n_odp_ports; i++) {
1096 svec_add (&devnames, odp_ports[i].devname);
1100 svec_sort_unique(&devnames);
1101 for (i = 0; i < devnames.n; i++) {
1102 update_port(p, devnames.names[i]);
1104 svec_destroy(&devnames);
1108 refresh_port_group(struct ofproto *p, unsigned int group)
1112 struct ofport *port;
1113 unsigned int port_no;
1115 assert(group == DP_GROUP_ALL || group == DP_GROUP_FLOOD);
1117 ports = xmalloc(port_array_count(&p->ports) * sizeof *ports);
1119 PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
1120 if (group == DP_GROUP_ALL || !(port->opp.config & OFPPC_NO_FLOOD)) {
1121 ports[n_ports++] = port_no;
1124 dpif_port_group_set(p->dpif, group, ports, n_ports);
1131 refresh_port_groups(struct ofproto *p)
1133 size_t n_flood = refresh_port_group(p, DP_GROUP_FLOOD);
1134 size_t n_all = refresh_port_group(p, DP_GROUP_ALL);
1136 ofproto_sflow_set_group_sizes(p->sflow, n_flood, n_all);
1140 static struct ofport *
1141 make_ofport(const struct odp_port *odp_port)
1143 struct netdev_options netdev_options;
1144 enum netdev_flags flags;
1145 struct ofport *ofport;
1146 struct netdev *netdev;
1150 memset(&netdev_options, 0, sizeof netdev_options);
1151 netdev_options.name = odp_port->devname;
1152 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
1153 netdev_options.may_open = true;
1155 error = netdev_open(&netdev_options, &netdev);
1157 VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
1158 "cannot be opened (%s)",
1159 odp_port->devname, odp_port->port,
1160 odp_port->devname, strerror(error));
1164 ofport = xmalloc(sizeof *ofport);
1165 ofport->netdev = netdev;
1166 ofport->opp.port_no = odp_port_to_ofp_port(odp_port->port);
1167 netdev_get_etheraddr(netdev, ofport->opp.hw_addr);
1168 memcpy(ofport->opp.name, odp_port->devname,
1169 MIN(sizeof ofport->opp.name, sizeof odp_port->devname));
1170 ofport->opp.name[sizeof ofport->opp.name - 1] = '\0';
1172 netdev_get_flags(netdev, &flags);
1173 ofport->opp.config = flags & NETDEV_UP ? 0 : OFPPC_PORT_DOWN;
1175 netdev_get_carrier(netdev, &carrier);
1176 ofport->opp.state = carrier ? 0 : OFPPS_LINK_DOWN;
1178 netdev_get_features(netdev,
1179 &ofport->opp.curr, &ofport->opp.advertised,
1180 &ofport->opp.supported, &ofport->opp.peer);
1185 ofport_conflicts(const struct ofproto *p, const struct odp_port *odp_port)
1187 if (port_array_get(&p->ports, odp_port->port)) {
1188 VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
1191 } else if (shash_find(&p->port_by_name, odp_port->devname)) {
1192 VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
1201 ofport_equal(const struct ofport *a_, const struct ofport *b_)
1203 const struct ofp_phy_port *a = &a_->opp;
1204 const struct ofp_phy_port *b = &b_->opp;
1206 BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
1207 return (a->port_no == b->port_no
1208 && !memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
1209 && !strcmp((char *) a->name, (char *) b->name)
1210 && a->state == b->state
1211 && a->config == b->config
1212 && a->curr == b->curr
1213 && a->advertised == b->advertised
1214 && a->supported == b->supported
1215 && a->peer == b->peer);
1219 send_port_status(struct ofproto *p, const struct ofport *ofport,
1222 /* XXX Should limit the number of queued port status change messages. */
1223 struct ofconn *ofconn;
1224 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
1225 struct ofp_port_status *ops;
1228 ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b);
1229 ops->reason = reason;
1230 ops->desc = ofport->opp;
1231 hton_ofp_phy_port(&ops->desc);
1232 queue_tx(b, ofconn, NULL);
1234 if (p->ofhooks->port_changed_cb) {
1235 p->ofhooks->port_changed_cb(reason, &ofport->opp, p->aux);
1240 ofport_install(struct ofproto *p, struct ofport *ofport)
1242 uint16_t odp_port = ofp_port_to_odp_port(ofport->opp.port_no);
1243 const char *netdev_name = (const char *) ofport->opp.name;
1245 netdev_monitor_add(p->netdev_monitor, ofport->netdev);
1246 port_array_set(&p->ports, odp_port, ofport);
1247 shash_add(&p->port_by_name, netdev_name, ofport);
1249 ofproto_sflow_add_port(p->sflow, odp_port, netdev_name);
1254 ofport_remove(struct ofproto *p, struct ofport *ofport)
1256 uint16_t odp_port = ofp_port_to_odp_port(ofport->opp.port_no);
1258 netdev_monitor_remove(p->netdev_monitor, ofport->netdev);
1259 port_array_set(&p->ports, odp_port, NULL);
1260 shash_delete(&p->port_by_name,
1261 shash_find(&p->port_by_name, (char *) ofport->opp.name));
1263 ofproto_sflow_del_port(p->sflow, odp_port);
1268 ofport_free(struct ofport *ofport)
1271 netdev_close(ofport->netdev);
1277 update_port(struct ofproto *p, const char *devname)
1279 struct odp_port odp_port;
1280 struct ofport *old_ofport;
1281 struct ofport *new_ofport;
1284 COVERAGE_INC(ofproto_update_port);
1286 /* Query the datapath for port information. */
1287 error = dpif_port_query_by_name(p->dpif, devname, &odp_port);
1289 /* Find the old ofport. */
1290 old_ofport = shash_find_data(&p->port_by_name, devname);
1293 /* There's no port named 'devname' but there might be a port with
1294 * the same port number. This could happen if a port is deleted
1295 * and then a new one added in its place very quickly, or if a port
1296 * is renamed. In the former case we want to send an OFPPR_DELETE
1297 * and an OFPPR_ADD, and in the latter case we want to send a
1298 * single OFPPR_MODIFY. We can distinguish the cases by comparing
1299 * the old port's ifindex against the new port, or perhaps less
1300 * reliably but more portably by comparing the old port's MAC
1301 * against the new port's MAC. However, this code isn't that smart
1302 * and always sends an OFPPR_MODIFY (XXX). */
1303 old_ofport = port_array_get(&p->ports, odp_port.port);
1305 } else if (error != ENOENT && error != ENODEV) {
1306 VLOG_WARN_RL(&rl, "dpif_port_query_by_name returned unexpected error "
1307 "%s", strerror(error));
1311 /* Create a new ofport. */
1312 new_ofport = !error ? make_ofport(&odp_port) : NULL;
1314 /* Eliminate a few pathological cases. */
1315 if (!old_ofport && !new_ofport) {
1317 } else if (old_ofport && new_ofport) {
1318 /* Most of the 'config' bits are OpenFlow soft state, but
1319 * OFPPC_PORT_DOWN is maintained the kernel. So transfer the OpenFlow
1320 * bits from old_ofport. (make_ofport() only sets OFPPC_PORT_DOWN and
1321 * leaves the other bits 0.) */
1322 new_ofport->opp.config |= old_ofport->opp.config & ~OFPPC_PORT_DOWN;
1324 if (ofport_equal(old_ofport, new_ofport)) {
1325 /* False alarm--no change. */
1326 ofport_free(new_ofport);
1331 /* Now deal with the normal cases. */
1333 ofport_remove(p, old_ofport);
1336 ofport_install(p, new_ofport);
1338 send_port_status(p, new_ofport ? new_ofport : old_ofport,
1339 (!old_ofport ? OFPPR_ADD
1340 : !new_ofport ? OFPPR_DELETE
1342 ofport_free(old_ofport);
1344 /* Update port groups. */
1345 refresh_port_groups(p);
1349 init_ports(struct ofproto *p)
1351 struct odp_port *ports;
1356 error = dpif_port_list(p->dpif, &ports, &n_ports);
1361 for (i = 0; i < n_ports; i++) {
1362 const struct odp_port *odp_port = &ports[i];
1363 if (!ofport_conflicts(p, odp_port)) {
1364 struct ofport *ofport = make_ofport(odp_port);
1366 ofport_install(p, ofport);
1371 refresh_port_groups(p);
1375 static struct ofconn *
1376 ofconn_create(struct ofproto *p, struct rconn *rconn)
1378 struct ofconn *ofconn = xmalloc(sizeof *ofconn);
1379 list_push_back(&p->all_conns, &ofconn->node);
1380 ofconn->rconn = rconn;
1381 ofconn->pktbuf = NULL;
1382 ofconn->miss_send_len = 0;
1383 ofconn->packet_in_counter = rconn_packet_counter_create ();
1384 ofconn->reply_counter = rconn_packet_counter_create ();
1389 ofconn_destroy(struct ofconn *ofconn)
1391 list_remove(&ofconn->node);
1392 rconn_destroy(ofconn->rconn);
1393 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1394 rconn_packet_counter_destroy(ofconn->reply_counter);
1395 pktbuf_destroy(ofconn->pktbuf);
1400 ofconn_run(struct ofconn *ofconn, struct ofproto *p)
1404 rconn_run(ofconn->rconn);
1406 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1407 /* Limit the number of iterations to prevent other tasks from
1409 for (iteration = 0; iteration < 50; iteration++) {
1410 struct ofpbuf *of_msg = rconn_recv(ofconn->rconn);
1415 fail_open_maybe_recover(p->fail_open);
1417 handle_openflow(ofconn, p, of_msg);
1418 ofpbuf_delete(of_msg);
1422 if (ofconn != p->controller && !rconn_is_alive(ofconn->rconn)) {
1423 ofconn_destroy(ofconn);
1428 ofconn_wait(struct ofconn *ofconn)
1430 rconn_run_wait(ofconn->rconn);
1431 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1432 rconn_recv_wait(ofconn->rconn);
1434 COVERAGE_INC(ofproto_ofconn_stuck);
1438 /* Caller is responsible for initializing the 'cr' member of the returned
1440 static struct rule *
1441 rule_create(struct ofproto *ofproto, struct rule *super,
1442 const union ofp_action *actions, size_t n_actions,
1443 uint16_t idle_timeout, uint16_t hard_timeout,
1444 uint64_t flow_cookie, bool send_flow_removed)
1446 struct rule *rule = xzalloc(sizeof *rule);
1447 rule->idle_timeout = idle_timeout;
1448 rule->hard_timeout = hard_timeout;
1449 rule->flow_cookie = flow_cookie;
1450 rule->used = rule->created = time_msec();
1451 rule->send_flow_removed = send_flow_removed;
1452 rule->super = super;
1454 list_push_back(&super->list, &rule->list);
1456 list_init(&rule->list);
1458 rule->n_actions = n_actions;
1459 rule->actions = xmemdup(actions, n_actions * sizeof *actions);
1460 netflow_flow_clear(&rule->nf_flow);
1461 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->created);
1466 static struct rule *
1467 rule_from_cls_rule(const struct cls_rule *cls_rule)
1469 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
1473 rule_free(struct rule *rule)
1475 free(rule->actions);
1476 free(rule->odp_actions);
1480 /* Destroys 'rule'. If 'rule' is a subrule, also removes it from its
1481 * super-rule's list of subrules. If 'rule' is a super-rule, also iterates
1482 * through all of its subrules and revalidates them, destroying any that no
1483 * longer has a super-rule (which is probably all of them).
1485 * Before calling this function, the caller must make have removed 'rule' from
1486 * the classifier. If 'rule' is an exact-match rule, the caller is also
1487 * responsible for ensuring that it has been uninstalled from the datapath. */
1489 rule_destroy(struct ofproto *ofproto, struct rule *rule)
1492 struct rule *subrule, *next;
1493 LIST_FOR_EACH_SAFE (subrule, next, struct rule, list, &rule->list) {
1494 revalidate_rule(ofproto, subrule);
1497 list_remove(&rule->list);
1503 rule_has_out_port(const struct rule *rule, uint16_t out_port)
1505 const union ofp_action *oa;
1506 struct actions_iterator i;
1508 if (out_port == htons(OFPP_NONE)) {
1511 for (oa = actions_first(&i, rule->actions, rule->n_actions); oa;
1512 oa = actions_next(&i)) {
1513 if (oa->type == htons(OFPAT_OUTPUT) && oa->output.port == out_port) {
1520 /* Executes the actions indicated by 'rule' on 'packet', which is in flow
1521 * 'flow' and is considered to have arrived on ODP port 'in_port'.
1523 * The flow that 'packet' actually contains does not need to actually match
1524 * 'rule'; the actions in 'rule' will be applied to it either way. Likewise,
1525 * the packet and byte counters for 'rule' will be credited for the packet sent
1526 * out whether or not the packet actually matches 'rule'.
1528 * If 'rule' is an exact-match rule and 'flow' actually equals the rule's flow,
1529 * the caller must already have accurately composed ODP actions for it given
1530 * 'packet' using rule_make_actions(). If 'rule' is a wildcard rule, or if
1531 * 'rule' is an exact-match rule but 'flow' is not the rule's flow, then this
1532 * function will compose a set of ODP actions based on 'rule''s OpenFlow
1533 * actions and apply them to 'packet'. */
1535 rule_execute(struct ofproto *ofproto, struct rule *rule,
1536 struct ofpbuf *packet, const flow_t *flow)
1538 const union odp_action *actions;
1540 struct odp_actions a;
1542 /* Grab or compose the ODP actions.
1544 * The special case for an exact-match 'rule' where 'flow' is not the
1545 * rule's flow is important to avoid, e.g., sending a packet out its input
1546 * port simply because the ODP actions were composed for the wrong
1548 if (rule->cr.wc.wildcards || !flow_equal(flow, &rule->cr.flow)) {
1549 struct rule *super = rule->super ? rule->super : rule;
1550 if (xlate_actions(super->actions, super->n_actions, flow, ofproto,
1551 packet, &a, NULL, 0, NULL)) {
1554 actions = a.actions;
1555 n_actions = a.n_actions;
1557 actions = rule->odp_actions;
1558 n_actions = rule->n_odp_actions;
1561 /* Execute the ODP actions. */
1562 if (!dpif_execute(ofproto->dpif, flow->in_port,
1563 actions, n_actions, packet)) {
1564 struct odp_flow_stats stats;
1565 flow_extract_stats(flow, packet, &stats);
1566 update_stats(ofproto, rule, &stats);
1567 rule->used = time_msec();
1568 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->used);
1573 rule_insert(struct ofproto *p, struct rule *rule, struct ofpbuf *packet,
1576 struct rule *displaced_rule;
1578 /* Insert the rule in the classifier. */
1579 displaced_rule = rule_from_cls_rule(classifier_insert(&p->cls, &rule->cr));
1580 if (!rule->cr.wc.wildcards) {
1581 rule_make_actions(p, rule, packet);
1584 /* Send the packet and credit it to the rule. */
1587 flow_extract(packet, 0, in_port, &flow);
1588 rule_execute(p, rule, packet, &flow);
1591 /* Install the rule in the datapath only after sending the packet, to
1592 * avoid packet reordering. */
1593 if (rule->cr.wc.wildcards) {
1594 COVERAGE_INC(ofproto_add_wc_flow);
1595 p->need_revalidate = true;
1597 rule_install(p, rule, displaced_rule);
1600 /* Free the rule that was displaced, if any. */
1601 if (displaced_rule) {
1602 rule_destroy(p, displaced_rule);
1606 static struct rule *
1607 rule_create_subrule(struct ofproto *ofproto, struct rule *rule,
1610 struct rule *subrule = rule_create(ofproto, rule, NULL, 0,
1611 rule->idle_timeout, rule->hard_timeout,
1613 COVERAGE_INC(ofproto_subrule_create);
1614 cls_rule_from_flow(flow, 0, (rule->cr.priority <= UINT16_MAX ? UINT16_MAX
1615 : rule->cr.priority), &subrule->cr);
1616 classifier_insert_exact(&ofproto->cls, &subrule->cr);
1622 rule_remove(struct ofproto *ofproto, struct rule *rule)
1624 if (rule->cr.wc.wildcards) {
1625 COVERAGE_INC(ofproto_del_wc_flow);
1626 ofproto->need_revalidate = true;
1628 rule_uninstall(ofproto, rule);
1630 classifier_remove(&ofproto->cls, &rule->cr);
1631 rule_destroy(ofproto, rule);
1634 /* Returns true if the actions changed, false otherwise. */
1636 rule_make_actions(struct ofproto *p, struct rule *rule,
1637 const struct ofpbuf *packet)
1639 const struct rule *super;
1640 struct odp_actions a;
1643 assert(!rule->cr.wc.wildcards);
1645 super = rule->super ? rule->super : rule;
1647 xlate_actions(super->actions, super->n_actions, &rule->cr.flow, p,
1648 packet, &a, &rule->tags, &rule->may_install,
1649 &rule->nf_flow.output_iface);
1651 actions_len = a.n_actions * sizeof *a.actions;
1652 if (rule->n_odp_actions != a.n_actions
1653 || memcmp(rule->odp_actions, a.actions, actions_len)) {
1654 COVERAGE_INC(ofproto_odp_unchanged);
1655 free(rule->odp_actions);
1656 rule->n_odp_actions = a.n_actions;
1657 rule->odp_actions = xmemdup(a.actions, actions_len);
1665 do_put_flow(struct ofproto *ofproto, struct rule *rule, int flags,
1666 struct odp_flow_put *put)
1668 memset(&put->flow.stats, 0, sizeof put->flow.stats);
1669 put->flow.key = rule->cr.flow;
1670 put->flow.actions = rule->odp_actions;
1671 put->flow.n_actions = rule->n_odp_actions;
1673 return dpif_flow_put(ofproto->dpif, put);
1677 rule_install(struct ofproto *p, struct rule *rule, struct rule *displaced_rule)
1679 assert(!rule->cr.wc.wildcards);
1681 if (rule->may_install) {
1682 struct odp_flow_put put;
1683 if (!do_put_flow(p, rule,
1684 ODPPF_CREATE | ODPPF_MODIFY | ODPPF_ZERO_STATS,
1686 rule->installed = true;
1687 if (displaced_rule) {
1688 update_stats(p, displaced_rule, &put.flow.stats);
1689 rule_post_uninstall(p, displaced_rule);
1692 } else if (displaced_rule) {
1693 rule_uninstall(p, displaced_rule);
1698 rule_reinstall(struct ofproto *ofproto, struct rule *rule)
1700 if (rule->installed) {
1701 struct odp_flow_put put;
1702 COVERAGE_INC(ofproto_dp_missed);
1703 do_put_flow(ofproto, rule, ODPPF_CREATE | ODPPF_MODIFY, &put);
1705 rule_install(ofproto, rule, NULL);
1710 rule_update_actions(struct ofproto *ofproto, struct rule *rule)
1712 bool actions_changed;
1713 uint16_t new_out_iface, old_out_iface;
1715 old_out_iface = rule->nf_flow.output_iface;
1716 actions_changed = rule_make_actions(ofproto, rule, NULL);
1718 if (rule->may_install) {
1719 if (rule->installed) {
1720 if (actions_changed) {
1721 struct odp_flow_put put;
1722 do_put_flow(ofproto, rule, ODPPF_CREATE | ODPPF_MODIFY
1723 | ODPPF_ZERO_STATS, &put);
1724 update_stats(ofproto, rule, &put.flow.stats);
1726 /* Temporarily set the old output iface so that NetFlow
1727 * messages have the correct output interface for the old
1729 new_out_iface = rule->nf_flow.output_iface;
1730 rule->nf_flow.output_iface = old_out_iface;
1731 rule_post_uninstall(ofproto, rule);
1732 rule->nf_flow.output_iface = new_out_iface;
1735 rule_install(ofproto, rule, NULL);
1738 rule_uninstall(ofproto, rule);
1743 rule_account(struct ofproto *ofproto, struct rule *rule, uint64_t extra_bytes)
1745 uint64_t total_bytes = rule->byte_count + extra_bytes;
1747 if (ofproto->ofhooks->account_flow_cb
1748 && total_bytes > rule->accounted_bytes)
1750 ofproto->ofhooks->account_flow_cb(
1751 &rule->cr.flow, rule->odp_actions, rule->n_odp_actions,
1752 total_bytes - rule->accounted_bytes, ofproto->aux);
1753 rule->accounted_bytes = total_bytes;
1758 rule_uninstall(struct ofproto *p, struct rule *rule)
1760 assert(!rule->cr.wc.wildcards);
1761 if (rule->installed) {
1762 struct odp_flow odp_flow;
1764 odp_flow.key = rule->cr.flow;
1765 odp_flow.actions = NULL;
1766 odp_flow.n_actions = 0;
1767 if (!dpif_flow_del(p->dpif, &odp_flow)) {
1768 update_stats(p, rule, &odp_flow.stats);
1770 rule->installed = false;
1772 rule_post_uninstall(p, rule);
1777 is_controller_rule(struct rule *rule)
1779 /* If the only action is send to the controller then don't report
1780 * NetFlow expiration messages since it is just part of the control
1781 * logic for the network and not real traffic. */
1783 if (rule && rule->super) {
1784 struct rule *super = rule->super;
1786 return super->n_actions == 1 &&
1787 super->actions[0].type == htons(OFPAT_OUTPUT) &&
1788 super->actions[0].output.port == htons(OFPP_CONTROLLER);
1795 rule_post_uninstall(struct ofproto *ofproto, struct rule *rule)
1797 struct rule *super = rule->super;
1799 rule_account(ofproto, rule, 0);
1801 if (ofproto->netflow && !is_controller_rule(rule)) {
1802 struct ofexpired expired;
1803 expired.flow = rule->cr.flow;
1804 expired.packet_count = rule->packet_count;
1805 expired.byte_count = rule->byte_count;
1806 expired.used = rule->used;
1807 netflow_expire(ofproto->netflow, &rule->nf_flow, &expired);
1810 super->packet_count += rule->packet_count;
1811 super->byte_count += rule->byte_count;
1813 /* Reset counters to prevent double counting if the rule ever gets
1815 rule->packet_count = 0;
1816 rule->byte_count = 0;
1817 rule->accounted_bytes = 0;
1819 netflow_flow_clear(&rule->nf_flow);
1824 queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
1825 struct rconn_packet_counter *counter)
1827 update_openflow_length(msg);
1828 if (rconn_send(ofconn->rconn, msg, counter)) {
1834 send_error(const struct ofconn *ofconn, const struct ofp_header *oh,
1835 int error, const void *data, size_t len)
1838 struct ofp_error_msg *oem;
1840 if (!(error >> 16)) {
1841 VLOG_WARN_RL(&rl, "not sending bad error code %d to controller",
1846 COVERAGE_INC(ofproto_error);
1847 oem = make_openflow_xid(len + sizeof *oem, OFPT_ERROR,
1848 oh ? oh->xid : 0, &buf);
1849 oem->type = htons((unsigned int) error >> 16);
1850 oem->code = htons(error & 0xffff);
1851 memcpy(oem->data, data, len);
1852 queue_tx(buf, ofconn, ofconn->reply_counter);
1856 send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh,
1859 size_t oh_length = ntohs(oh->length);
1860 send_error(ofconn, oh, error, oh, MIN(oh_length, 64));
1864 hton_ofp_phy_port(struct ofp_phy_port *opp)
1866 opp->port_no = htons(opp->port_no);
1867 opp->config = htonl(opp->config);
1868 opp->state = htonl(opp->state);
1869 opp->curr = htonl(opp->curr);
1870 opp->advertised = htonl(opp->advertised);
1871 opp->supported = htonl(opp->supported);
1872 opp->peer = htonl(opp->peer);
1876 handle_echo_request(struct ofconn *ofconn, struct ofp_header *oh)
1878 struct ofp_header *rq = oh;
1879 queue_tx(make_echo_reply(rq), ofconn, ofconn->reply_counter);
1884 handle_features_request(struct ofproto *p, struct ofconn *ofconn,
1885 struct ofp_header *oh)
1887 struct ofp_switch_features *osf;
1889 unsigned int port_no;
1890 struct ofport *port;
1892 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
1893 osf->datapath_id = htonll(p->datapath_id);
1894 osf->n_buffers = htonl(pktbuf_capacity());
1896 osf->capabilities = htonl(OFPC_FLOW_STATS | OFPC_TABLE_STATS |
1897 OFPC_PORT_STATS | OFPC_ARP_MATCH_IP);
1898 osf->actions = htonl((1u << OFPAT_OUTPUT) |
1899 (1u << OFPAT_SET_VLAN_VID) |
1900 (1u << OFPAT_SET_VLAN_PCP) |
1901 (1u << OFPAT_STRIP_VLAN) |
1902 (1u << OFPAT_SET_DL_SRC) |
1903 (1u << OFPAT_SET_DL_DST) |
1904 (1u << OFPAT_SET_NW_SRC) |
1905 (1u << OFPAT_SET_NW_DST) |
1906 (1u << OFPAT_SET_NW_TOS) |
1907 (1u << OFPAT_SET_TP_SRC) |
1908 (1u << OFPAT_SET_TP_DST));
1910 PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
1911 hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
1914 queue_tx(buf, ofconn, ofconn->reply_counter);
1919 handle_get_config_request(struct ofproto *p, struct ofconn *ofconn,
1920 struct ofp_header *oh)
1923 struct ofp_switch_config *osc;
1927 /* Figure out flags. */
1928 dpif_get_drop_frags(p->dpif, &drop_frags);
1929 flags = drop_frags ? OFPC_FRAG_DROP : OFPC_FRAG_NORMAL;
1932 osc = make_openflow_xid(sizeof *osc, OFPT_GET_CONFIG_REPLY, oh->xid, &buf);
1933 osc->flags = htons(flags);
1934 osc->miss_send_len = htons(ofconn->miss_send_len);
1935 queue_tx(buf, ofconn, ofconn->reply_counter);
1941 handle_set_config(struct ofproto *p, struct ofconn *ofconn,
1942 struct ofp_switch_config *osc)
1947 error = check_ofp_message(&osc->header, OFPT_SET_CONFIG, sizeof *osc);
1951 flags = ntohs(osc->flags);
1953 if (ofconn == p->controller) {
1954 switch (flags & OFPC_FRAG_MASK) {
1955 case OFPC_FRAG_NORMAL:
1956 dpif_set_drop_frags(p->dpif, false);
1958 case OFPC_FRAG_DROP:
1959 dpif_set_drop_frags(p->dpif, true);
1962 VLOG_WARN_RL(&rl, "requested bad fragment mode (flags=%"PRIx16")",
1968 if ((ntohs(osc->miss_send_len) != 0) != (ofconn->miss_send_len != 0)) {
1969 if (ntohs(osc->miss_send_len) != 0) {
1970 ofconn->pktbuf = pktbuf_create();
1972 pktbuf_destroy(ofconn->pktbuf);
1976 ofconn->miss_send_len = ntohs(osc->miss_send_len);
1982 add_output_group_action(struct odp_actions *actions, uint16_t group,
1983 uint16_t *nf_output_iface)
1985 odp_actions_add(actions, ODPAT_OUTPUT_GROUP)->output_group.group = group;
1987 if (group == DP_GROUP_ALL || group == DP_GROUP_FLOOD) {
1988 *nf_output_iface = NF_OUT_FLOOD;
1993 add_controller_action(struct odp_actions *actions,
1994 const struct ofp_action_output *oao)
1996 union odp_action *a = odp_actions_add(actions, ODPAT_CONTROLLER);
1997 a->controller.arg = oao->max_len ? ntohs(oao->max_len) : UINT32_MAX;
2000 struct action_xlate_ctx {
2002 flow_t flow; /* Flow to which these actions correspond. */
2003 int recurse; /* Recursion level, via xlate_table_action. */
2004 struct ofproto *ofproto;
2005 const struct ofpbuf *packet; /* The packet corresponding to 'flow', or a
2006 * null pointer if we are revalidating
2007 * without a packet to refer to. */
2010 struct odp_actions *out; /* Datapath actions. */
2011 tag_type *tags; /* Tags associated with OFPP_NORMAL actions. */
2012 bool may_set_up_flow; /* True ordinarily; false if the actions must
2013 * be reassessed for every packet. */
2014 uint16_t nf_output_iface; /* Output interface index for NetFlow. */
2017 static void do_xlate_actions(const union ofp_action *in, size_t n_in,
2018 struct action_xlate_ctx *ctx);
2021 add_output_action(struct action_xlate_ctx *ctx, uint16_t port)
2023 const struct ofport *ofport = port_array_get(&ctx->ofproto->ports, port);
2026 if (ofport->opp.config & OFPPC_NO_FWD) {
2027 /* Forwarding disabled on port. */
2032 * We don't have an ofport record for this port, but it doesn't hurt to
2033 * allow forwarding to it anyhow. Maybe such a port will appear later
2034 * and we're pre-populating the flow table.
2038 odp_actions_add(ctx->out, ODPAT_OUTPUT)->output.port = port;
2039 ctx->nf_output_iface = port;
2042 static struct rule *
2043 lookup_valid_rule(struct ofproto *ofproto, const flow_t *flow)
2046 rule = rule_from_cls_rule(classifier_lookup(&ofproto->cls, flow));
2048 /* The rule we found might not be valid, since we could be in need of
2049 * revalidation. If it is not valid, don't return it. */
2052 && ofproto->need_revalidate
2053 && !revalidate_rule(ofproto, rule)) {
2054 COVERAGE_INC(ofproto_invalidated);
2062 xlate_table_action(struct action_xlate_ctx *ctx, uint16_t in_port)
2064 if (!ctx->recurse) {
2065 uint16_t old_in_port;
2068 /* Look up a flow with 'in_port' as the input port. Then restore the
2069 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2070 * have surprising behavior). */
2071 old_in_port = ctx->flow.in_port;
2072 ctx->flow.in_port = in_port;
2073 rule = lookup_valid_rule(ctx->ofproto, &ctx->flow);
2074 ctx->flow.in_port = old_in_port;
2082 do_xlate_actions(rule->actions, rule->n_actions, ctx);
2089 xlate_output_action(struct action_xlate_ctx *ctx,
2090 const struct ofp_action_output *oao)
2093 uint16_t prev_nf_output_iface = ctx->nf_output_iface;
2095 ctx->nf_output_iface = NF_OUT_DROP;
2097 switch (ntohs(oao->port)) {
2099 add_output_action(ctx, ctx->flow.in_port);
2102 xlate_table_action(ctx, ctx->flow.in_port);
2105 if (!ctx->ofproto->ofhooks->normal_cb(&ctx->flow, ctx->packet,
2106 ctx->out, ctx->tags,
2107 &ctx->nf_output_iface,
2108 ctx->ofproto->aux)) {
2109 COVERAGE_INC(ofproto_uninstallable);
2110 ctx->may_set_up_flow = false;
2114 add_output_group_action(ctx->out, DP_GROUP_FLOOD,
2115 &ctx->nf_output_iface);
2118 add_output_group_action(ctx->out, DP_GROUP_ALL, &ctx->nf_output_iface);
2120 case OFPP_CONTROLLER:
2121 add_controller_action(ctx->out, oao);
2124 add_output_action(ctx, ODPP_LOCAL);
2127 odp_port = ofp_port_to_odp_port(ntohs(oao->port));
2128 if (odp_port != ctx->flow.in_port) {
2129 add_output_action(ctx, odp_port);
2134 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2135 ctx->nf_output_iface = NF_OUT_FLOOD;
2136 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
2137 ctx->nf_output_iface = prev_nf_output_iface;
2138 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2139 ctx->nf_output_iface != NF_OUT_FLOOD) {
2140 ctx->nf_output_iface = NF_OUT_MULTI;
2145 xlate_nicira_action(struct action_xlate_ctx *ctx,
2146 const struct nx_action_header *nah)
2148 const struct nx_action_resubmit *nar;
2149 const struct nx_action_set_tunnel *nast;
2150 union odp_action *oa;
2151 int subtype = ntohs(nah->subtype);
2153 assert(nah->vendor == htonl(NX_VENDOR_ID));
2155 case NXAST_RESUBMIT:
2156 nar = (const struct nx_action_resubmit *) nah;
2157 xlate_table_action(ctx, ofp_port_to_odp_port(ntohs(nar->in_port)));
2160 case NXAST_SET_TUNNEL:
2161 nast = (const struct nx_action_set_tunnel *) nah;
2162 oa = odp_actions_add(ctx->out, ODPAT_SET_TUNNEL);
2163 ctx->flow.tun_id = oa->tunnel.tun_id = nast->tun_id;
2166 /* If you add a new action here that modifies flow data, don't forget to
2167 * update the flow key in ctx->flow in the same key. */
2170 VLOG_DBG_RL(&rl, "unknown Nicira action type %"PRIu16, subtype);
2176 do_xlate_actions(const union ofp_action *in, size_t n_in,
2177 struct action_xlate_ctx *ctx)
2179 struct actions_iterator iter;
2180 const union ofp_action *ia;
2181 const struct ofport *port;
2183 port = port_array_get(&ctx->ofproto->ports, ctx->flow.in_port);
2184 if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
2185 port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, stp_eth_addr)
2186 ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
2187 /* Drop this flow. */
2191 for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
2192 uint16_t type = ntohs(ia->type);
2193 union odp_action *oa;
2197 xlate_output_action(ctx, &ia->output);
2200 case OFPAT_SET_VLAN_VID:
2201 oa = odp_actions_add(ctx->out, ODPAT_SET_VLAN_VID);
2202 ctx->flow.dl_vlan = oa->vlan_vid.vlan_vid = ia->vlan_vid.vlan_vid;
2205 case OFPAT_SET_VLAN_PCP:
2206 oa = odp_actions_add(ctx->out, ODPAT_SET_VLAN_PCP);
2207 ctx->flow.dl_vlan_pcp = oa->vlan_pcp.vlan_pcp = ia->vlan_pcp.vlan_pcp;
2210 case OFPAT_STRIP_VLAN:
2211 odp_actions_add(ctx->out, ODPAT_STRIP_VLAN);
2212 ctx->flow.dl_vlan = OFP_VLAN_NONE;
2213 ctx->flow.dl_vlan_pcp = 0;
2216 case OFPAT_SET_DL_SRC:
2217 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_SRC);
2218 memcpy(oa->dl_addr.dl_addr,
2219 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2220 memcpy(ctx->flow.dl_src,
2221 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2224 case OFPAT_SET_DL_DST:
2225 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_DST);
2226 memcpy(oa->dl_addr.dl_addr,
2227 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2228 memcpy(ctx->flow.dl_dst,
2229 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2232 case OFPAT_SET_NW_SRC:
2233 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_SRC);
2234 ctx->flow.nw_src = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
2237 case OFPAT_SET_NW_DST:
2238 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_DST);
2239 ctx->flow.nw_dst = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
2242 case OFPAT_SET_NW_TOS:
2243 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_TOS);
2244 ctx->flow.nw_tos = oa->nw_tos.nw_tos = ia->nw_tos.nw_tos;
2247 case OFPAT_SET_TP_SRC:
2248 oa = odp_actions_add(ctx->out, ODPAT_SET_TP_SRC);
2249 ctx->flow.tp_src = oa->tp_port.tp_port = ia->tp_port.tp_port;
2252 case OFPAT_SET_TP_DST:
2253 oa = odp_actions_add(ctx->out, ODPAT_SET_TP_DST);
2254 ctx->flow.tp_dst = oa->tp_port.tp_port = ia->tp_port.tp_port;
2258 xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
2262 VLOG_DBG_RL(&rl, "unknown action type %"PRIu16, type);
2269 xlate_actions(const union ofp_action *in, size_t n_in,
2270 const flow_t *flow, struct ofproto *ofproto,
2271 const struct ofpbuf *packet,
2272 struct odp_actions *out, tag_type *tags, bool *may_set_up_flow,
2273 uint16_t *nf_output_iface)
2275 tag_type no_tags = 0;
2276 struct action_xlate_ctx ctx;
2277 COVERAGE_INC(ofproto_ofp2odp);
2278 odp_actions_init(out);
2281 ctx.ofproto = ofproto;
2282 ctx.packet = packet;
2284 ctx.tags = tags ? tags : &no_tags;
2285 ctx.may_set_up_flow = true;
2286 ctx.nf_output_iface = NF_OUT_DROP;
2287 do_xlate_actions(in, n_in, &ctx);
2289 /* Check with in-band control to see if we're allowed to set up this
2291 if (!in_band_rule_check(ofproto->in_band, flow, out)) {
2292 ctx.may_set_up_flow = false;
2295 if (may_set_up_flow) {
2296 *may_set_up_flow = ctx.may_set_up_flow;
2298 if (nf_output_iface) {
2299 *nf_output_iface = ctx.nf_output_iface;
2301 if (odp_actions_overflow(out)) {
2302 odp_actions_init(out);
2303 return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_TOO_MANY);
2309 handle_packet_out(struct ofproto *p, struct ofconn *ofconn,
2310 struct ofp_header *oh)
2312 struct ofp_packet_out *opo;
2313 struct ofpbuf payload, *buffer;
2314 struct odp_actions actions;
2320 error = check_ofp_packet_out(oh, &payload, &n_actions, p->max_ports);
2324 opo = (struct ofp_packet_out *) oh;
2326 COVERAGE_INC(ofproto_packet_out);
2327 if (opo->buffer_id != htonl(UINT32_MAX)) {
2328 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(opo->buffer_id),
2330 if (error || !buffer) {
2338 flow_extract(&payload, 0, ofp_port_to_odp_port(ntohs(opo->in_port)), &flow);
2339 error = xlate_actions((const union ofp_action *) opo->actions, n_actions,
2340 &flow, p, &payload, &actions, NULL, NULL, NULL);
2345 dpif_execute(p->dpif, flow.in_port, actions.actions, actions.n_actions,
2347 ofpbuf_delete(buffer);
2353 update_port_config(struct ofproto *p, struct ofport *port,
2354 uint32_t config, uint32_t mask)
2356 mask &= config ^ port->opp.config;
2357 if (mask & OFPPC_PORT_DOWN) {
2358 if (config & OFPPC_PORT_DOWN) {
2359 netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
2361 netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
2364 #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | OFPPC_NO_FWD)
2365 if (mask & REVALIDATE_BITS) {
2366 COVERAGE_INC(ofproto_costly_flags);
2367 port->opp.config ^= mask & REVALIDATE_BITS;
2368 p->need_revalidate = true;
2370 #undef REVALIDATE_BITS
2371 if (mask & OFPPC_NO_FLOOD) {
2372 port->opp.config ^= OFPPC_NO_FLOOD;
2373 refresh_port_groups(p);
2375 if (mask & OFPPC_NO_PACKET_IN) {
2376 port->opp.config ^= OFPPC_NO_PACKET_IN;
2381 handle_port_mod(struct ofproto *p, struct ofp_header *oh)
2383 const struct ofp_port_mod *opm;
2384 struct ofport *port;
2387 error = check_ofp_message(oh, OFPT_PORT_MOD, sizeof *opm);
2391 opm = (struct ofp_port_mod *) oh;
2393 port = port_array_get(&p->ports,
2394 ofp_port_to_odp_port(ntohs(opm->port_no)));
2396 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
2397 } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
2398 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR);
2400 update_port_config(p, port, ntohl(opm->config), ntohl(opm->mask));
2401 if (opm->advertise) {
2402 netdev_set_advertisements(port->netdev, ntohl(opm->advertise));
2408 static struct ofpbuf *
2409 make_stats_reply(uint32_t xid, uint16_t type, size_t body_len)
2411 struct ofp_stats_reply *osr;
2414 msg = ofpbuf_new(MIN(sizeof *osr + body_len, UINT16_MAX));
2415 osr = put_openflow_xid(sizeof *osr, OFPT_STATS_REPLY, xid, msg);
2417 osr->flags = htons(0);
2421 static struct ofpbuf *
2422 start_stats_reply(const struct ofp_stats_request *request, size_t body_len)
2424 return make_stats_reply(request->header.xid, request->type, body_len);
2428 append_stats_reply(size_t nbytes, struct ofconn *ofconn, struct ofpbuf **msgp)
2430 struct ofpbuf *msg = *msgp;
2431 assert(nbytes <= UINT16_MAX - sizeof(struct ofp_stats_reply));
2432 if (nbytes + msg->size > UINT16_MAX) {
2433 struct ofp_stats_reply *reply = msg->data;
2434 reply->flags = htons(OFPSF_REPLY_MORE);
2435 *msgp = make_stats_reply(reply->header.xid, reply->type, nbytes);
2436 queue_tx(msg, ofconn, ofconn->reply_counter);
2438 return ofpbuf_put_uninit(*msgp, nbytes);
2442 handle_desc_stats_request(struct ofproto *p, struct ofconn *ofconn,
2443 struct ofp_stats_request *request)
2445 struct ofp_desc_stats *ods;
2448 msg = start_stats_reply(request, sizeof *ods);
2449 ods = append_stats_reply(sizeof *ods, ofconn, &msg);
2450 memset(ods, 0, sizeof *ods);
2451 ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
2452 ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
2453 ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
2454 ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
2455 ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
2456 queue_tx(msg, ofconn, ofconn->reply_counter);
2462 count_subrules(struct cls_rule *cls_rule, void *n_subrules_)
2464 struct rule *rule = rule_from_cls_rule(cls_rule);
2465 int *n_subrules = n_subrules_;
2473 handle_table_stats_request(struct ofproto *p, struct ofconn *ofconn,
2474 struct ofp_stats_request *request)
2476 struct ofp_table_stats *ots;
2478 struct odp_stats dpstats;
2479 int n_exact, n_subrules, n_wild;
2481 msg = start_stats_reply(request, sizeof *ots * 2);
2483 /* Count rules of various kinds. */
2485 classifier_for_each(&p->cls, CLS_INC_EXACT, count_subrules, &n_subrules);
2486 n_exact = classifier_count_exact(&p->cls) - n_subrules;
2487 n_wild = classifier_count(&p->cls) - classifier_count_exact(&p->cls);
2490 dpif_get_dp_stats(p->dpif, &dpstats);
2491 ots = append_stats_reply(sizeof *ots, ofconn, &msg);
2492 memset(ots, 0, sizeof *ots);
2493 ots->table_id = TABLEID_HASH;
2494 strcpy(ots->name, "hash");
2495 ots->wildcards = htonl(0);
2496 ots->max_entries = htonl(dpstats.max_capacity);
2497 ots->active_count = htonl(n_exact);
2498 ots->lookup_count = htonll(dpstats.n_frags + dpstats.n_hit +
2500 ots->matched_count = htonll(dpstats.n_hit); /* XXX */
2502 /* Classifier table. */
2503 ots = append_stats_reply(sizeof *ots, ofconn, &msg);
2504 memset(ots, 0, sizeof *ots);
2505 ots->table_id = TABLEID_CLASSIFIER;
2506 strcpy(ots->name, "classifier");
2507 ots->wildcards = p->tun_id_from_cookie ? htonl(OVSFW_ALL)
2509 ots->max_entries = htonl(65536);
2510 ots->active_count = htonl(n_wild);
2511 ots->lookup_count = htonll(0); /* XXX */
2512 ots->matched_count = htonll(0); /* XXX */
2514 queue_tx(msg, ofconn, ofconn->reply_counter);
2519 append_port_stat(struct ofport *port, uint16_t port_no, struct ofconn *ofconn,
2522 struct netdev_stats stats;
2523 struct ofp_port_stats *ops;
2525 /* Intentionally ignore return value, since errors will set
2526 * 'stats' to all-1s, which is correct for OpenFlow, and
2527 * netdev_get_stats() will log errors. */
2528 netdev_get_stats(port->netdev, &stats);
2530 ops = append_stats_reply(sizeof *ops, ofconn, &msg);
2531 ops->port_no = htons(odp_port_to_ofp_port(port_no));
2532 memset(ops->pad, 0, sizeof ops->pad);
2533 ops->rx_packets = htonll(stats.rx_packets);
2534 ops->tx_packets = htonll(stats.tx_packets);
2535 ops->rx_bytes = htonll(stats.rx_bytes);
2536 ops->tx_bytes = htonll(stats.tx_bytes);
2537 ops->rx_dropped = htonll(stats.rx_dropped);
2538 ops->tx_dropped = htonll(stats.tx_dropped);
2539 ops->rx_errors = htonll(stats.rx_errors);
2540 ops->tx_errors = htonll(stats.tx_errors);
2541 ops->rx_frame_err = htonll(stats.rx_frame_errors);
2542 ops->rx_over_err = htonll(stats.rx_over_errors);
2543 ops->rx_crc_err = htonll(stats.rx_crc_errors);
2544 ops->collisions = htonll(stats.collisions);
2548 handle_port_stats_request(struct ofproto *p, struct ofconn *ofconn,
2549 struct ofp_stats_request *osr,
2552 struct ofp_port_stats_request *psr;
2553 struct ofp_port_stats *ops;
2555 struct ofport *port;
2556 unsigned int port_no;
2558 if (arg_size != sizeof *psr) {
2559 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
2561 psr = (struct ofp_port_stats_request *) osr->body;
2563 msg = start_stats_reply(osr, sizeof *ops * 16);
2564 if (psr->port_no != htons(OFPP_NONE)) {
2565 port = port_array_get(&p->ports,
2566 ofp_port_to_odp_port(ntohs(psr->port_no)));
2568 append_port_stat(port, ntohs(psr->port_no), ofconn, msg);
2571 PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
2572 append_port_stat(port, port_no, ofconn, msg);
2576 queue_tx(msg, ofconn, ofconn->reply_counter);
2580 struct flow_stats_cbdata {
2581 struct ofproto *ofproto;
2582 struct ofconn *ofconn;
2587 /* Obtains statistic counters for 'rule' within 'p' and stores them into
2588 * '*packet_countp' and '*byte_countp'. If 'rule' is a wildcarded rule, the
2589 * returned statistic include statistics for all of 'rule''s subrules. */
2591 query_stats(struct ofproto *p, struct rule *rule,
2592 uint64_t *packet_countp, uint64_t *byte_countp)
2594 uint64_t packet_count, byte_count;
2595 struct rule *subrule;
2596 struct odp_flow *odp_flows;
2599 /* Start from historical data for 'rule' itself that are no longer tracked
2600 * by the datapath. This counts, for example, subrules that have
2602 packet_count = rule->packet_count;
2603 byte_count = rule->byte_count;
2605 /* Prepare to ask the datapath for statistics on 'rule', or if it is
2606 * wildcarded then on all of its subrules.
2608 * Also, add any statistics that are not tracked by the datapath for each
2609 * subrule. This includes, for example, statistics for packets that were
2610 * executed "by hand" by ofproto via dpif_execute() but must be accounted
2612 n_odp_flows = rule->cr.wc.wildcards ? list_size(&rule->list) : 1;
2613 odp_flows = xzalloc(n_odp_flows * sizeof *odp_flows);
2614 if (rule->cr.wc.wildcards) {
2616 LIST_FOR_EACH (subrule, struct rule, list, &rule->list) {
2617 odp_flows[i++].key = subrule->cr.flow;
2618 packet_count += subrule->packet_count;
2619 byte_count += subrule->byte_count;
2622 odp_flows[0].key = rule->cr.flow;
2625 /* Fetch up-to-date statistics from the datapath and add them in. */
2626 if (!dpif_flow_get_multiple(p->dpif, odp_flows, n_odp_flows)) {
2628 for (i = 0; i < n_odp_flows; i++) {
2629 struct odp_flow *odp_flow = &odp_flows[i];
2630 packet_count += odp_flow->stats.n_packets;
2631 byte_count += odp_flow->stats.n_bytes;
2636 /* Return the stats to the caller. */
2637 *packet_countp = packet_count;
2638 *byte_countp = byte_count;
2642 flow_stats_cb(struct cls_rule *rule_, void *cbdata_)
2644 struct rule *rule = rule_from_cls_rule(rule_);
2645 struct flow_stats_cbdata *cbdata = cbdata_;
2646 struct ofp_flow_stats *ofs;
2647 uint64_t packet_count, byte_count;
2648 size_t act_len, len;
2649 long long int tdiff = time_msec() - rule->created;
2650 uint32_t sec = tdiff / 1000;
2651 uint32_t msec = tdiff - (sec * 1000);
2653 if (rule_is_hidden(rule) || !rule_has_out_port(rule, cbdata->out_port)) {
2657 act_len = sizeof *rule->actions * rule->n_actions;
2658 len = offsetof(struct ofp_flow_stats, actions) + act_len;
2660 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
2662 ofs = append_stats_reply(len, cbdata->ofconn, &cbdata->msg);
2663 ofs->length = htons(len);
2664 ofs->table_id = rule->cr.wc.wildcards ? TABLEID_CLASSIFIER : TABLEID_HASH;
2666 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards,
2667 cbdata->ofproto->tun_id_from_cookie, &ofs->match);
2668 ofs->duration_sec = htonl(sec);
2669 ofs->duration_nsec = htonl(msec * 1000000);
2670 ofs->cookie = rule->flow_cookie;
2671 ofs->priority = htons(rule->cr.priority);
2672 ofs->idle_timeout = htons(rule->idle_timeout);
2673 ofs->hard_timeout = htons(rule->hard_timeout);
2674 memset(ofs->pad2, 0, sizeof ofs->pad2);
2675 ofs->packet_count = htonll(packet_count);
2676 ofs->byte_count = htonll(byte_count);
2677 memcpy(ofs->actions, rule->actions, act_len);
2681 table_id_to_include(uint8_t table_id)
2683 return (table_id == TABLEID_HASH ? CLS_INC_EXACT
2684 : table_id == TABLEID_CLASSIFIER ? CLS_INC_WILD
2685 : table_id == 0xff ? CLS_INC_ALL
2690 handle_flow_stats_request(struct ofproto *p, struct ofconn *ofconn,
2691 const struct ofp_stats_request *osr,
2694 struct ofp_flow_stats_request *fsr;
2695 struct flow_stats_cbdata cbdata;
2696 struct cls_rule target;
2698 if (arg_size != sizeof *fsr) {
2699 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
2701 fsr = (struct ofp_flow_stats_request *) osr->body;
2703 COVERAGE_INC(ofproto_flows_req);
2705 cbdata.ofconn = ofconn;
2706 cbdata.out_port = fsr->out_port;
2707 cbdata.msg = start_stats_reply(osr, 1024);
2708 cls_rule_from_match(&fsr->match, 0, false, 0, &target);
2709 classifier_for_each_match(&p->cls, &target,
2710 table_id_to_include(fsr->table_id),
2711 flow_stats_cb, &cbdata);
2712 queue_tx(cbdata.msg, ofconn, ofconn->reply_counter);
2716 struct flow_stats_ds_cbdata {
2717 struct ofproto *ofproto;
2722 flow_stats_ds_cb(struct cls_rule *rule_, void *cbdata_)
2724 struct rule *rule = rule_from_cls_rule(rule_);
2725 struct flow_stats_ds_cbdata *cbdata = cbdata_;
2726 struct ds *results = cbdata->results;
2727 struct ofp_match match;
2728 uint64_t packet_count, byte_count;
2729 size_t act_len = sizeof *rule->actions * rule->n_actions;
2731 /* Don't report on subrules. */
2732 if (rule->super != NULL) {
2736 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
2737 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards,
2738 cbdata->ofproto->tun_id_from_cookie, &match);
2740 ds_put_format(results, "duration=%llds, ",
2741 (time_msec() - rule->created) / 1000);
2742 ds_put_format(results, "priority=%u, ", rule->cr.priority);
2743 ds_put_format(results, "n_packets=%"PRIu64", ", packet_count);
2744 ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
2745 ofp_print_match(results, &match, true);
2746 ofp_print_actions(results, &rule->actions->header, act_len);
2747 ds_put_cstr(results, "\n");
2750 /* Adds a pretty-printed description of all flows to 'results', including
2751 * those marked hidden by secchan (e.g., by in-band control). */
2753 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
2755 struct ofp_match match;
2756 struct cls_rule target;
2757 struct flow_stats_ds_cbdata cbdata;
2759 memset(&match, 0, sizeof match);
2760 match.wildcards = htonl(OVSFW_ALL);
2763 cbdata.results = results;
2765 cls_rule_from_match(&match, 0, false, 0, &target);
2766 classifier_for_each_match(&p->cls, &target, CLS_INC_ALL,
2767 flow_stats_ds_cb, &cbdata);
2770 struct aggregate_stats_cbdata {
2771 struct ofproto *ofproto;
2773 uint64_t packet_count;
2774 uint64_t byte_count;
2779 aggregate_stats_cb(struct cls_rule *rule_, void *cbdata_)
2781 struct rule *rule = rule_from_cls_rule(rule_);
2782 struct aggregate_stats_cbdata *cbdata = cbdata_;
2783 uint64_t packet_count, byte_count;
2785 if (rule_is_hidden(rule) || !rule_has_out_port(rule, cbdata->out_port)) {
2789 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
2791 cbdata->packet_count += packet_count;
2792 cbdata->byte_count += byte_count;
2797 handle_aggregate_stats_request(struct ofproto *p, struct ofconn *ofconn,
2798 const struct ofp_stats_request *osr,
2801 struct ofp_aggregate_stats_request *asr;
2802 struct ofp_aggregate_stats_reply *reply;
2803 struct aggregate_stats_cbdata cbdata;
2804 struct cls_rule target;
2807 if (arg_size != sizeof *asr) {
2808 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
2810 asr = (struct ofp_aggregate_stats_request *) osr->body;
2812 COVERAGE_INC(ofproto_agg_request);
2814 cbdata.out_port = asr->out_port;
2815 cbdata.packet_count = 0;
2816 cbdata.byte_count = 0;
2818 cls_rule_from_match(&asr->match, 0, false, 0, &target);
2819 classifier_for_each_match(&p->cls, &target,
2820 table_id_to_include(asr->table_id),
2821 aggregate_stats_cb, &cbdata);
2823 msg = start_stats_reply(osr, sizeof *reply);
2824 reply = append_stats_reply(sizeof *reply, ofconn, &msg);
2825 reply->flow_count = htonl(cbdata.n_flows);
2826 reply->packet_count = htonll(cbdata.packet_count);
2827 reply->byte_count = htonll(cbdata.byte_count);
2828 queue_tx(msg, ofconn, ofconn->reply_counter);
2833 handle_stats_request(struct ofproto *p, struct ofconn *ofconn,
2834 struct ofp_header *oh)
2836 struct ofp_stats_request *osr;
2840 error = check_ofp_message_array(oh, OFPT_STATS_REQUEST, sizeof *osr,
2845 osr = (struct ofp_stats_request *) oh;
2847 switch (ntohs(osr->type)) {
2849 return handle_desc_stats_request(p, ofconn, osr);
2852 return handle_flow_stats_request(p, ofconn, osr, arg_size);
2854 case OFPST_AGGREGATE:
2855 return handle_aggregate_stats_request(p, ofconn, osr, arg_size);
2858 return handle_table_stats_request(p, ofconn, osr);
2861 return handle_port_stats_request(p, ofconn, osr, arg_size);
2864 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
2867 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT);
2871 static long long int
2872 msec_from_nsec(uint64_t sec, uint32_t nsec)
2874 return !sec ? 0 : sec * 1000 + nsec / 1000000;
2878 update_time(struct ofproto *ofproto, struct rule *rule,
2879 const struct odp_flow_stats *stats)
2881 long long int used = msec_from_nsec(stats->used_sec, stats->used_nsec);
2882 if (used > rule->used) {
2884 if (rule->super && used > rule->super->used) {
2885 rule->super->used = used;
2887 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, used);
2892 update_stats(struct ofproto *ofproto, struct rule *rule,
2893 const struct odp_flow_stats *stats)
2895 if (stats->n_packets) {
2896 update_time(ofproto, rule, stats);
2897 rule->packet_count += stats->n_packets;
2898 rule->byte_count += stats->n_bytes;
2899 netflow_flow_update_flags(&rule->nf_flow, stats->ip_tos,
2904 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
2905 * in which no matching flow already exists in the flow table.
2907 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
2908 * ofp_actions, to 'p''s flow table. Returns 0 on success or an OpenFlow error
2909 * code as encoded by ofp_mkerr() on failure.
2911 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
2914 add_flow(struct ofproto *p, struct ofconn *ofconn,
2915 const struct ofp_flow_mod *ofm, size_t n_actions)
2917 struct ofpbuf *packet;
2922 if (ofm->flags & htons(OFPFF_CHECK_OVERLAP)) {
2926 flow_from_match(&ofm->match, p->tun_id_from_cookie, ofm->cookie,
2928 if (classifier_rule_overlaps(&p->cls, &flow, wildcards,
2929 ntohs(ofm->priority))) {
2930 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP);
2934 rule = rule_create(p, NULL, (const union ofp_action *) ofm->actions,
2935 n_actions, ntohs(ofm->idle_timeout),
2936 ntohs(ofm->hard_timeout), ofm->cookie,
2937 ofm->flags & htons(OFPFF_SEND_FLOW_REM));
2938 cls_rule_from_match(&ofm->match, ntohs(ofm->priority),
2939 p->tun_id_from_cookie, ofm->cookie, &rule->cr);
2942 if (ofm->buffer_id != htonl(UINT32_MAX)) {
2943 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(ofm->buffer_id),
2947 in_port = UINT16_MAX;
2950 rule_insert(p, rule, packet, in_port);
2951 ofpbuf_delete(packet);
2955 static struct rule *
2956 find_flow_strict(struct ofproto *p, const struct ofp_flow_mod *ofm)
2961 flow_from_match(&ofm->match, p->tun_id_from_cookie, ofm->cookie,
2963 return rule_from_cls_rule(classifier_find_rule_exactly(
2964 &p->cls, &flow, wildcards,
2965 ntohs(ofm->priority)));
2969 send_buffered_packet(struct ofproto *ofproto, struct ofconn *ofconn,
2970 struct rule *rule, const struct ofp_flow_mod *ofm)
2972 struct ofpbuf *packet;
2977 if (ofm->buffer_id == htonl(UINT32_MAX)) {
2981 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(ofm->buffer_id),
2987 flow_extract(packet, 0, in_port, &flow);
2988 rule_execute(ofproto, rule, packet, &flow);
2989 ofpbuf_delete(packet);
2994 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
2996 struct modify_flows_cbdata {
2997 struct ofproto *ofproto;
2998 const struct ofp_flow_mod *ofm;
3003 static int modify_flow(struct ofproto *, const struct ofp_flow_mod *,
3004 size_t n_actions, struct rule *);
3005 static void modify_flows_cb(struct cls_rule *, void *cbdata_);
3007 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
3008 * encoded by ofp_mkerr() on failure.
3010 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3013 modify_flows_loose(struct ofproto *p, struct ofconn *ofconn,
3014 const struct ofp_flow_mod *ofm, size_t n_actions)
3016 struct modify_flows_cbdata cbdata;
3017 struct cls_rule target;
3021 cbdata.n_actions = n_actions;
3022 cbdata.match = NULL;
3024 cls_rule_from_match(&ofm->match, 0, p->tun_id_from_cookie, ofm->cookie,
3027 classifier_for_each_match(&p->cls, &target, CLS_INC_ALL,
3028 modify_flows_cb, &cbdata);
3030 /* This credits the packet to whichever flow happened to happened to
3031 * match last. That's weird. Maybe we should do a lookup for the
3032 * flow that actually matches the packet? Who knows. */
3033 send_buffered_packet(p, ofconn, cbdata.match, ofm);
3036 return add_flow(p, ofconn, ofm, n_actions);
3040 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
3041 * code as encoded by ofp_mkerr() on failure.
3043 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3046 modify_flow_strict(struct ofproto *p, struct ofconn *ofconn,
3047 struct ofp_flow_mod *ofm, size_t n_actions)
3049 struct rule *rule = find_flow_strict(p, ofm);
3050 if (rule && !rule_is_hidden(rule)) {
3051 modify_flow(p, ofm, n_actions, rule);
3052 return send_buffered_packet(p, ofconn, rule, ofm);
3054 return add_flow(p, ofconn, ofm, n_actions);
3058 /* Callback for modify_flows_loose(). */
3060 modify_flows_cb(struct cls_rule *rule_, void *cbdata_)
3062 struct rule *rule = rule_from_cls_rule(rule_);
3063 struct modify_flows_cbdata *cbdata = cbdata_;
3065 if (!rule_is_hidden(rule)) {
3066 cbdata->match = rule;
3067 modify_flow(cbdata->ofproto, cbdata->ofm, cbdata->n_actions, rule);
3071 /* Implements core of OFPFC_MODIFY and OFPFC_MODIFY_STRICT where 'rule' has
3072 * been identified as a flow in 'p''s flow table to be modified, by changing
3073 * the rule's actions to match those in 'ofm' (which is followed by 'n_actions'
3074 * ofp_action[] structures). */
3076 modify_flow(struct ofproto *p, const struct ofp_flow_mod *ofm,
3077 size_t n_actions, struct rule *rule)
3079 size_t actions_len = n_actions * sizeof *rule->actions;
3081 rule->flow_cookie = ofm->cookie;
3083 /* If the actions are the same, do nothing. */
3084 if (n_actions == rule->n_actions
3085 && !memcmp(ofm->actions, rule->actions, actions_len))
3090 /* Replace actions. */
3091 free(rule->actions);
3092 rule->actions = xmemdup(ofm->actions, actions_len);
3093 rule->n_actions = n_actions;
3095 /* Make sure that the datapath gets updated properly. */
3096 if (rule->cr.wc.wildcards) {
3097 COVERAGE_INC(ofproto_mod_wc_flow);
3098 p->need_revalidate = true;
3100 rule_update_actions(p, rule);
3106 /* OFPFC_DELETE implementation. */
3108 struct delete_flows_cbdata {
3109 struct ofproto *ofproto;
3113 static void delete_flows_cb(struct cls_rule *, void *cbdata_);
3114 static void delete_flow(struct ofproto *, struct rule *, uint16_t out_port);
3116 /* Implements OFPFC_DELETE. */
3118 delete_flows_loose(struct ofproto *p, const struct ofp_flow_mod *ofm)
3120 struct delete_flows_cbdata cbdata;
3121 struct cls_rule target;
3124 cbdata.out_port = ofm->out_port;
3126 cls_rule_from_match(&ofm->match, 0, p->tun_id_from_cookie, ofm->cookie,
3129 classifier_for_each_match(&p->cls, &target, CLS_INC_ALL,
3130 delete_flows_cb, &cbdata);
3133 /* Implements OFPFC_DELETE_STRICT. */
3135 delete_flow_strict(struct ofproto *p, struct ofp_flow_mod *ofm)
3137 struct rule *rule = find_flow_strict(p, ofm);
3139 delete_flow(p, rule, ofm->out_port);
3143 /* Callback for delete_flows_loose(). */
3145 delete_flows_cb(struct cls_rule *rule_, void *cbdata_)
3147 struct rule *rule = rule_from_cls_rule(rule_);
3148 struct delete_flows_cbdata *cbdata = cbdata_;
3150 delete_flow(cbdata->ofproto, rule, cbdata->out_port);
3153 /* Implements core of OFPFC_DELETE and OFPFC_DELETE_STRICT where 'rule' has
3154 * been identified as a flow to delete from 'p''s flow table, by deleting the
3155 * flow and sending out a OFPT_FLOW_REMOVED message to any interested
3158 * Will not delete 'rule' if it is hidden. Will delete 'rule' only if
3159 * 'out_port' is htons(OFPP_NONE) or if 'rule' actually outputs to the
3160 * specified 'out_port'. */
3162 delete_flow(struct ofproto *p, struct rule *rule, uint16_t out_port)
3164 if (rule_is_hidden(rule)) {
3168 if (out_port != htons(OFPP_NONE) && !rule_has_out_port(rule, out_port)) {
3172 send_flow_removed(p, rule, time_msec(), OFPRR_DELETE);
3173 rule_remove(p, rule);
3177 handle_flow_mod(struct ofproto *p, struct ofconn *ofconn,
3178 struct ofp_flow_mod *ofm)
3183 error = check_ofp_message_array(&ofm->header, OFPT_FLOW_MOD, sizeof *ofm,
3184 sizeof *ofm->actions, &n_actions);
3189 /* We do not support the emergency flow cache. It will hopefully
3190 * get dropped from OpenFlow in the near future. */
3191 if (ofm->flags & htons(OFPFF_EMERG)) {
3192 /* There isn't a good fit for an error code, so just state that the
3193 * flow table is full. */
3194 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
3197 normalize_match(&ofm->match);
3198 if (!ofm->match.wildcards) {
3199 ofm->priority = htons(UINT16_MAX);
3202 error = validate_actions((const union ofp_action *) ofm->actions,
3203 n_actions, p->max_ports);
3208 switch (ntohs(ofm->command)) {
3210 return add_flow(p, ofconn, ofm, n_actions);
3213 return modify_flows_loose(p, ofconn, ofm, n_actions);
3215 case OFPFC_MODIFY_STRICT:
3216 return modify_flow_strict(p, ofconn, ofm, n_actions);
3219 delete_flows_loose(p, ofm);
3222 case OFPFC_DELETE_STRICT:
3223 delete_flow_strict(p, ofm);
3227 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND);
3232 handle_tun_id_from_cookie(struct ofproto *p, struct nxt_tun_id_cookie *msg)
3236 error = check_ofp_message(&msg->header, OFPT_VENDOR, sizeof *msg);
3241 p->tun_id_from_cookie = !!msg->set;
3246 handle_vendor(struct ofproto *p, struct ofconn *ofconn, void *msg)
3248 struct ofp_vendor_header *ovh = msg;
3249 struct nicira_header *nh;
3251 if (ntohs(ovh->header.length) < sizeof(struct ofp_vendor_header)) {
3252 VLOG_WARN_RL(&rl, "received vendor message of length %zu "
3253 "(expected at least %zu)",
3254 ntohs(ovh->header.length), sizeof(struct ofp_vendor_header));
3255 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3257 if (ovh->vendor != htonl(NX_VENDOR_ID)) {
3258 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
3260 if (ntohs(ovh->header.length) < sizeof(struct nicira_header)) {
3261 VLOG_WARN_RL(&rl, "received Nicira vendor message of length %zu "
3262 "(expected at least %zu)",
3263 ntohs(ovh->header.length), sizeof(struct nicira_header));
3264 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3268 switch (ntohl(nh->subtype)) {
3269 case NXT_STATUS_REQUEST:
3270 return switch_status_handle_request(p->switch_status, ofconn->rconn,
3273 case NXT_TUN_ID_FROM_COOKIE:
3274 return handle_tun_id_from_cookie(p, msg);
3277 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE);
3281 handle_barrier_request(struct ofconn *ofconn, struct ofp_header *oh)
3283 struct ofp_header *ob;
3286 /* Currently, everything executes synchronously, so we can just
3287 * immediately send the barrier reply. */
3288 ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
3289 queue_tx(buf, ofconn, ofconn->reply_counter);
3294 handle_openflow(struct ofconn *ofconn, struct ofproto *p,
3295 struct ofpbuf *ofp_msg)
3297 struct ofp_header *oh = ofp_msg->data;
3300 COVERAGE_INC(ofproto_recv_openflow);
3302 case OFPT_ECHO_REQUEST:
3303 error = handle_echo_request(ofconn, oh);
3306 case OFPT_ECHO_REPLY:
3310 case OFPT_FEATURES_REQUEST:
3311 error = handle_features_request(p, ofconn, oh);
3314 case OFPT_GET_CONFIG_REQUEST:
3315 error = handle_get_config_request(p, ofconn, oh);
3318 case OFPT_SET_CONFIG:
3319 error = handle_set_config(p, ofconn, ofp_msg->data);
3322 case OFPT_PACKET_OUT:
3323 error = handle_packet_out(p, ofconn, ofp_msg->data);
3327 error = handle_port_mod(p, oh);
3331 error = handle_flow_mod(p, ofconn, ofp_msg->data);
3334 case OFPT_STATS_REQUEST:
3335 error = handle_stats_request(p, ofconn, oh);
3339 error = handle_vendor(p, ofconn, ofp_msg->data);
3342 case OFPT_BARRIER_REQUEST:
3343 error = handle_barrier_request(ofconn, oh);
3347 if (VLOG_IS_WARN_ENABLED()) {
3348 char *s = ofp_to_string(oh, ntohs(oh->length), 2);
3349 VLOG_DBG_RL(&rl, "OpenFlow message ignored: %s", s);
3352 error = ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
3357 send_error_oh(ofconn, ofp_msg->data, error);
3362 handle_odp_miss_msg(struct ofproto *p, struct ofpbuf *packet)
3364 struct odp_msg *msg = packet->data;
3365 uint16_t in_port = odp_port_to_ofp_port(msg->port);
3367 struct ofpbuf payload;
3370 payload.data = msg + 1;
3371 payload.size = msg->length - sizeof *msg;
3372 flow_extract(&payload, msg->arg, msg->port, &flow);
3374 /* Check with in-band control to see if this packet should be sent
3375 * to the local port regardless of the flow table. */
3376 if (in_band_msg_in_hook(p->in_band, &flow, &payload)) {
3377 union odp_action action;
3379 memset(&action, 0, sizeof(action));
3380 action.output.type = ODPAT_OUTPUT;
3381 action.output.port = ODPP_LOCAL;
3382 dpif_execute(p->dpif, flow.in_port, &action, 1, &payload);
3385 rule = lookup_valid_rule(p, &flow);
3387 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
3388 struct ofport *port = port_array_get(&p->ports, msg->port);
3390 if (port->opp.config & OFPPC_NO_PACKET_IN) {
3391 COVERAGE_INC(ofproto_no_packet_in);
3392 /* XXX install 'drop' flow entry */
3393 ofpbuf_delete(packet);
3397 VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16, msg->port);
3400 COVERAGE_INC(ofproto_packet_in);
3401 pinsched_send(p->miss_sched, in_port, packet, send_packet_in_miss, p);
3405 if (rule->cr.wc.wildcards) {
3406 rule = rule_create_subrule(p, rule, &flow);
3407 rule_make_actions(p, rule, packet);
3409 if (!rule->may_install) {
3410 /* The rule is not installable, that is, we need to process every
3411 * packet, so process the current packet and set its actions into
3413 rule_make_actions(p, rule, packet);
3415 /* XXX revalidate rule if it needs it */
3419 rule_execute(p, rule, &payload, &flow);
3420 rule_reinstall(p, rule);
3422 if (rule->super && rule->super->cr.priority == FAIL_OPEN_PRIORITY
3423 && rconn_is_connected(p->controller->rconn)) {
3425 * Extra-special case for fail-open mode.
3427 * We are in fail-open mode and the packet matched the fail-open rule,
3428 * but we are connected to a controller too. We should send the packet
3429 * up to the controller in the hope that it will try to set up a flow
3430 * and thereby allow us to exit fail-open.
3432 * See the top-level comment in fail-open.c for more information.
3434 pinsched_send(p->miss_sched, in_port, packet, send_packet_in_miss, p);
3436 ofpbuf_delete(packet);
3441 handle_odp_msg(struct ofproto *p, struct ofpbuf *packet)
3443 struct odp_msg *msg = packet->data;
3445 switch (msg->type) {
3446 case _ODPL_ACTION_NR:
3447 COVERAGE_INC(ofproto_ctlr_action);
3448 pinsched_send(p->action_sched, odp_port_to_ofp_port(msg->port), packet,
3449 send_packet_in_action, p);
3452 case _ODPL_SFLOW_NR:
3454 ofproto_sflow_received(p->sflow, msg);
3456 ofpbuf_delete(packet);
3460 handle_odp_miss_msg(p, packet);
3464 VLOG_WARN_RL(&rl, "received ODP message of unexpected type %"PRIu32,
3471 revalidate_cb(struct cls_rule *sub_, void *cbdata_)
3473 struct rule *sub = rule_from_cls_rule(sub_);
3474 struct revalidate_cbdata *cbdata = cbdata_;
3476 if (cbdata->revalidate_all
3477 || (cbdata->revalidate_subrules && sub->super)
3478 || (tag_set_intersects(&cbdata->revalidate_set, sub->tags))) {
3479 revalidate_rule(cbdata->ofproto, sub);
3484 revalidate_rule(struct ofproto *p, struct rule *rule)
3486 const flow_t *flow = &rule->cr.flow;
3488 COVERAGE_INC(ofproto_revalidate_rule);
3491 super = rule_from_cls_rule(classifier_lookup_wild(&p->cls, flow));
3493 rule_remove(p, rule);
3495 } else if (super != rule->super) {
3496 COVERAGE_INC(ofproto_revalidate_moved);
3497 list_remove(&rule->list);
3498 list_push_back(&super->list, &rule->list);
3499 rule->super = super;
3500 rule->hard_timeout = super->hard_timeout;
3501 rule->idle_timeout = super->idle_timeout;
3502 rule->created = super->created;
3507 rule_update_actions(p, rule);
3511 static struct ofpbuf *
3512 compose_flow_removed(struct ofproto *p, const struct rule *rule,
3513 long long int now, uint8_t reason)
3515 struct ofp_flow_removed *ofr;
3517 long long int tdiff = now - rule->created;
3518 uint32_t sec = tdiff / 1000;
3519 uint32_t msec = tdiff - (sec * 1000);
3521 ofr = make_openflow(sizeof *ofr, OFPT_FLOW_REMOVED, &buf);
3522 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards, p->tun_id_from_cookie,
3524 ofr->cookie = rule->flow_cookie;
3525 ofr->priority = htons(rule->cr.priority);
3526 ofr->reason = reason;
3527 ofr->duration_sec = htonl(sec);
3528 ofr->duration_nsec = htonl(msec * 1000000);
3529 ofr->idle_timeout = htons(rule->idle_timeout);
3530 ofr->packet_count = htonll(rule->packet_count);
3531 ofr->byte_count = htonll(rule->byte_count);
3537 uninstall_idle_flow(struct ofproto *ofproto, struct rule *rule)
3539 assert(rule->installed);
3540 assert(!rule->cr.wc.wildcards);
3543 rule_remove(ofproto, rule);
3545 rule_uninstall(ofproto, rule);
3549 send_flow_removed(struct ofproto *p, struct rule *rule,
3550 long long int now, uint8_t reason)
3552 struct ofconn *ofconn;
3553 struct ofconn *prev;
3554 struct ofpbuf *buf = NULL;
3556 /* We limit the maximum number of queued flow expirations it by accounting
3557 * them under the counter for replies. That works because preventing
3558 * OpenFlow requests from being processed also prevents new flows from
3559 * being added (and expiring). (It also prevents processing OpenFlow
3560 * requests that would not add new flows, so it is imperfect.) */
3563 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
3564 if (rule->send_flow_removed && rconn_is_connected(ofconn->rconn)) {
3566 queue_tx(ofpbuf_clone(buf), prev, prev->reply_counter);
3568 buf = compose_flow_removed(p, rule, now, reason);
3574 queue_tx(buf, prev, prev->reply_counter);
3580 expire_rule(struct cls_rule *cls_rule, void *p_)
3582 struct ofproto *p = p_;
3583 struct rule *rule = rule_from_cls_rule(cls_rule);
3584 long long int hard_expire, idle_expire, expire, now;
3586 hard_expire = (rule->hard_timeout
3587 ? rule->created + rule->hard_timeout * 1000
3589 idle_expire = (rule->idle_timeout
3590 && (rule->super || list_is_empty(&rule->list))
3591 ? rule->used + rule->idle_timeout * 1000
3593 expire = MIN(hard_expire, idle_expire);
3597 if (rule->installed && now >= rule->used + 5000) {
3598 uninstall_idle_flow(p, rule);
3599 } else if (!rule->cr.wc.wildcards) {
3600 active_timeout(p, rule);
3606 COVERAGE_INC(ofproto_expired);
3608 /* Update stats. This code will be a no-op if the rule expired
3609 * due to an idle timeout. */
3610 if (rule->cr.wc.wildcards) {
3611 struct rule *subrule, *next;
3612 LIST_FOR_EACH_SAFE (subrule, next, struct rule, list, &rule->list) {
3613 rule_remove(p, subrule);
3616 rule_uninstall(p, rule);
3619 if (!rule_is_hidden(rule)) {
3620 send_flow_removed(p, rule, now,
3622 ? OFPRR_HARD_TIMEOUT : OFPRR_IDLE_TIMEOUT));
3624 rule_remove(p, rule);
3628 active_timeout(struct ofproto *ofproto, struct rule *rule)
3630 if (ofproto->netflow && !is_controller_rule(rule) &&
3631 netflow_active_timeout_expired(ofproto->netflow, &rule->nf_flow)) {
3632 struct ofexpired expired;
3633 struct odp_flow odp_flow;
3635 /* Get updated flow stats. */
3636 memset(&odp_flow, 0, sizeof odp_flow);
3637 if (rule->installed) {
3638 odp_flow.key = rule->cr.flow;
3639 odp_flow.flags = ODPFF_ZERO_TCP_FLAGS;
3640 dpif_flow_get(ofproto->dpif, &odp_flow);
3642 if (odp_flow.stats.n_packets) {
3643 update_time(ofproto, rule, &odp_flow.stats);
3644 netflow_flow_update_flags(&rule->nf_flow, odp_flow.stats.ip_tos,
3645 odp_flow.stats.tcp_flags);
3649 expired.flow = rule->cr.flow;
3650 expired.packet_count = rule->packet_count +
3651 odp_flow.stats.n_packets;
3652 expired.byte_count = rule->byte_count + odp_flow.stats.n_bytes;
3653 expired.used = rule->used;
3655 netflow_expire(ofproto->netflow, &rule->nf_flow, &expired);
3657 /* Schedule us to send the accumulated records once we have
3658 * collected all of them. */
3659 poll_immediate_wake();
3664 update_used(struct ofproto *p)
3666 struct odp_flow *flows;
3671 error = dpif_flow_list_all(p->dpif, &flows, &n_flows);
3676 for (i = 0; i < n_flows; i++) {
3677 struct odp_flow *f = &flows[i];
3680 rule = rule_from_cls_rule(
3681 classifier_find_rule_exactly(&p->cls, &f->key, 0, UINT16_MAX));
3682 if (!rule || !rule->installed) {
3683 COVERAGE_INC(ofproto_unexpected_rule);
3684 dpif_flow_del(p->dpif, f);
3688 update_time(p, rule, &f->stats);
3689 rule_account(p, rule, f->stats.n_bytes);
3695 do_send_packet_in(struct ofconn *ofconn, uint32_t buffer_id,
3696 const struct ofpbuf *packet, int send_len)
3698 struct odp_msg *msg = packet->data;
3699 struct ofpbuf payload;
3703 /* Extract packet payload from 'msg'. */
3704 payload.data = msg + 1;
3705 payload.size = msg->length - sizeof *msg;
3707 /* Construct ofp_packet_in message. */
3708 reason = msg->type == _ODPL_ACTION_NR ? OFPR_ACTION : OFPR_NO_MATCH;
3709 opi = make_packet_in(buffer_id, odp_port_to_ofp_port(msg->port), reason,
3710 &payload, send_len);
3713 rconn_send_with_limit(ofconn->rconn, opi, ofconn->packet_in_counter, 100);
3717 send_packet_in_action(struct ofpbuf *packet, void *p_)
3719 struct ofproto *p = p_;
3720 struct ofconn *ofconn;
3721 struct odp_msg *msg;
3724 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
3725 if (ofconn == p->controller || ofconn->miss_send_len) {
3726 do_send_packet_in(ofconn, UINT32_MAX, packet, msg->arg);
3729 ofpbuf_delete(packet);
3733 send_packet_in_miss(struct ofpbuf *packet, void *p_)
3735 struct ofproto *p = p_;
3736 bool in_fail_open = p->fail_open && fail_open_is_active(p->fail_open);
3737 struct ofconn *ofconn;
3738 struct ofpbuf payload;
3739 struct odp_msg *msg;
3742 payload.data = msg + 1;
3743 payload.size = msg->length - sizeof *msg;
3744 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
3745 if (ofconn->miss_send_len) {
3746 struct pktbuf *pb = ofconn->pktbuf;
3747 uint32_t buffer_id = (in_fail_open
3749 : pktbuf_save(pb, &payload, msg->port));
3750 int send_len = (buffer_id != UINT32_MAX ? ofconn->miss_send_len
3752 do_send_packet_in(ofconn, buffer_id, packet, send_len);
3755 ofpbuf_delete(packet);
3759 pick_datapath_id(const struct ofproto *ofproto)
3761 const struct ofport *port;
3763 port = port_array_get(&ofproto->ports, ODPP_LOCAL);
3765 uint8_t ea[ETH_ADDR_LEN];
3768 error = netdev_get_etheraddr(port->netdev, ea);
3770 return eth_addr_to_uint64(ea);
3772 VLOG_WARN("could not get MAC address for %s (%s)",
3773 netdev_get_name(port->netdev), strerror(error));
3775 return ofproto->fallback_dpid;
3779 pick_fallback_dpid(void)
3781 uint8_t ea[ETH_ADDR_LEN];
3782 eth_addr_nicira_random(ea);
3783 return eth_addr_to_uint64(ea);
3787 default_normal_ofhook_cb(const flow_t *flow, const struct ofpbuf *packet,
3788 struct odp_actions *actions, tag_type *tags,
3789 uint16_t *nf_output_iface, void *ofproto_)
3791 struct ofproto *ofproto = ofproto_;
3794 /* Drop frames for reserved multicast addresses. */
3795 if (eth_addr_is_reserved(flow->dl_dst)) {
3799 /* Learn source MAC (but don't try to learn from revalidation). */
3800 if (packet != NULL) {
3801 tag_type rev_tag = mac_learning_learn(ofproto->ml, flow->dl_src,
3804 /* The log messages here could actually be useful in debugging,
3805 * so keep the rate limit relatively high. */
3806 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
3807 VLOG_DBG_RL(&rl, "learned that "ETH_ADDR_FMT" is on port %"PRIu16,
3808 ETH_ADDR_ARGS(flow->dl_src), flow->in_port);
3809 ofproto_revalidate(ofproto, rev_tag);
3813 /* Determine output port. */
3814 out_port = mac_learning_lookup_tag(ofproto->ml, flow->dl_dst, 0, tags);
3816 add_output_group_action(actions, DP_GROUP_FLOOD, nf_output_iface);
3817 } else if (out_port != flow->in_port) {
3818 odp_actions_add(actions, ODPAT_OUTPUT)->output.port = out_port;
3819 *nf_output_iface = out_port;
3827 static const struct ofhooks default_ofhooks = {
3829 default_normal_ofhook_cb,