2 * Copyright (c) 2009, 2010 Nicira Networks.
3 * Copyright (c) 2010 Jean Tourrilhes - HP-Labs.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
22 #include <sys/socket.h>
24 #include <netinet/in.h>
27 #include "classifier.h"
29 #include "discovery.h"
31 #include "dynamic-string.h"
32 #include "fail-open.h"
34 #include "mac-learning.h"
38 #include "ofp-print.h"
39 #include "ofproto-sflow.h"
41 #include "openflow/nicira-ext.h"
42 #include "openflow/openflow.h"
43 #include "openvswitch/datapath-protocol.h"
47 #include "poll-loop.h"
48 #include "port-array.h"
53 #include "stream-ssl.h"
61 #define THIS_MODULE VLM_ofproto
64 #include "sflow_api.h"
68 TABLEID_CLASSIFIER = 1
72 struct netdev *netdev;
73 struct ofp_phy_port opp; /* In host byte order. */
76 static void ofport_free(struct ofport *);
77 static void hton_ofp_phy_port(struct ofp_phy_port *);
79 static int xlate_actions(const union ofp_action *in, size_t n_in,
80 const flow_t *flow, struct ofproto *ofproto,
81 const struct ofpbuf *packet,
82 struct odp_actions *out, tag_type *tags,
83 bool *may_set_up_flow, uint16_t *nf_output_iface);
88 uint64_t flow_cookie; /* Controller-issued identifier.
89 (Kept in network-byte order.) */
90 uint16_t idle_timeout; /* In seconds from time of last use. */
91 uint16_t hard_timeout; /* In seconds from time of creation. */
92 bool send_flow_removed; /* Send a flow removed message? */
93 long long int used; /* Last-used time (0 if never used). */
94 long long int created; /* Creation time. */
95 uint64_t packet_count; /* Number of packets received. */
96 uint64_t byte_count; /* Number of bytes received. */
97 uint64_t accounted_bytes; /* Number of bytes passed to account_cb. */
98 tag_type tags; /* Tags (set only by hooks). */
99 struct netflow_flow nf_flow; /* Per-flow NetFlow tracking data. */
101 /* If 'super' is non-NULL, this rule is a subrule, that is, it is an
102 * exact-match rule (having cr.wc.wildcards of 0) generated from the
103 * wildcard rule 'super'. In this case, 'list' is an element of the
106 * If 'super' is NULL, this rule is a super-rule, and 'list' is the head of
107 * a list of subrules. A super-rule with no wildcards (where
108 * cr.wc.wildcards is 0) will never have any subrules. */
114 * 'n_actions' is the number of elements in the 'actions' array. A single
115 * action may take up more more than one element's worth of space.
117 * A subrule has no actions (it uses the super-rule's actions). */
119 union ofp_action *actions;
123 * A super-rule with wildcard fields never has ODP actions (since the
124 * datapath only supports exact-match flows). */
125 bool installed; /* Installed in datapath? */
126 bool may_install; /* True ordinarily; false if actions must
127 * be reassessed for every packet. */
129 union odp_action *odp_actions;
133 rule_is_hidden(const struct rule *rule)
135 /* Subrules are merely an implementation detail, so hide them from the
137 if (rule->super != NULL) {
141 /* Rules with priority higher than UINT16_MAX are set up by ofproto itself
142 * (e.g. by in-band control) and are intentionally hidden from the
144 if (rule->cr.priority > UINT16_MAX) {
151 static struct rule *rule_create(struct ofproto *, struct rule *super,
152 const union ofp_action *, size_t n_actions,
153 uint16_t idle_timeout, uint16_t hard_timeout,
154 uint64_t flow_cookie, bool send_flow_removed);
155 static void rule_free(struct rule *);
156 static void rule_destroy(struct ofproto *, struct rule *);
157 static struct rule *rule_from_cls_rule(const struct cls_rule *);
158 static void rule_insert(struct ofproto *, struct rule *,
159 struct ofpbuf *packet, uint16_t in_port);
160 static void rule_remove(struct ofproto *, struct rule *);
161 static bool rule_make_actions(struct ofproto *, struct rule *,
162 const struct ofpbuf *packet);
163 static void rule_install(struct ofproto *, struct rule *,
164 struct rule *displaced_rule);
165 static void rule_uninstall(struct ofproto *, struct rule *);
166 static void rule_post_uninstall(struct ofproto *, struct rule *);
167 static void send_flow_removed(struct ofproto *p, struct rule *rule,
168 long long int now, uint8_t reason);
170 /* ofproto supports two kinds of OpenFlow connections:
172 * - "Controller connections": Connections to ordinary OpenFlow controllers.
173 * ofproto maintains persistent connections to these controllers and by
174 * default sends them asynchronous messages such as packet-ins.
176 * - "Transient connections", e.g. from ovs-ofctl. When these connections
177 * drop, it is the other side's responsibility to reconnect them if
178 * necessary. ofproto does not send them asynchronous messages by default.
181 OFCONN_CONTROLLER, /* An OpenFlow controller. */
182 OFCONN_TRANSIENT /* A transient connection. */
185 /* An OpenFlow connection. */
187 struct ofproto *ofproto; /* The ofproto that owns this connection. */
188 struct list node; /* In struct ofproto's "all_conns" list. */
189 struct rconn *rconn; /* OpenFlow connection. */
190 enum ofconn_type type; /* Type. */
192 /* OFPT_PACKET_IN related data. */
193 struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */
194 struct pinsched *schedulers[2]; /* Indexed by reason code; see below. */
195 struct pktbuf *pktbuf; /* OpenFlow packet buffers. */
196 int miss_send_len; /* Bytes to send of buffered packets. */
198 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
199 * requests, and the maximum number before we stop reading OpenFlow
201 #define OFCONN_REPLY_MAX 100
202 struct rconn_packet_counter *reply_counter;
204 /* type == OFCONN_CONTROLLER only. */
205 enum nx_role role; /* Role. */
206 struct hmap_node hmap_node; /* In struct ofproto's "controllers" map. */
207 struct discovery *discovery; /* Controller discovery object, if enabled. */
208 struct status_category *ss; /* Switch status category. */
209 enum ofproto_band band; /* In-band or out-of-band? */
212 /* We use OFPR_NO_MATCH and OFPR_ACTION as indexes into struct ofconn's
213 * "schedulers" array. Their values are 0 and 1, and their meanings and values
214 * coincide with _ODPL_MISS_NR and _ODPL_ACTION_NR, so this is convenient. In
215 * case anything ever changes, check their values here. */
216 #define N_SCHEDULERS 2
217 BUILD_ASSERT_DECL(OFPR_NO_MATCH == 0);
218 BUILD_ASSERT_DECL(OFPR_NO_MATCH == _ODPL_MISS_NR);
219 BUILD_ASSERT_DECL(OFPR_ACTION == 1);
220 BUILD_ASSERT_DECL(OFPR_ACTION == _ODPL_ACTION_NR);
222 static struct ofconn *ofconn_create(struct ofproto *, struct rconn *,
224 static void ofconn_destroy(struct ofconn *);
225 static void ofconn_run(struct ofconn *, struct ofproto *);
226 static void ofconn_wait(struct ofconn *);
227 static bool ofconn_receives_async_msgs(const struct ofconn *);
229 static void queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
230 struct rconn_packet_counter *counter);
232 static void send_packet_in(struct ofproto *, struct ofpbuf *odp_msg);
233 static void do_send_packet_in(struct ofpbuf *odp_msg, void *ofconn);
237 uint64_t datapath_id; /* Datapath ID. */
238 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
239 char *mfr_desc; /* Manufacturer. */
240 char *hw_desc; /* Hardware. */
241 char *sw_desc; /* Software version. */
242 char *serial_desc; /* Serial number. */
243 char *dp_desc; /* Datapath description. */
247 struct netdev_monitor *netdev_monitor;
248 struct port_array ports; /* Index is ODP port nr; ofport->opp.port_no is
250 struct shash port_by_name;
254 struct switch_status *switch_status;
255 struct fail_open *fail_open;
256 struct netflow *netflow;
257 struct ofproto_sflow *sflow;
259 /* In-band control. */
260 struct in_band *in_band;
261 long long int next_in_band_update;
262 struct sockaddr_in *extra_in_band_remotes;
263 size_t n_extra_remotes;
266 struct classifier cls;
267 bool need_revalidate;
268 long long int next_expiration;
269 struct tag_set revalidate_set;
270 bool tun_id_from_cookie;
272 /* OpenFlow connections. */
273 struct hmap controllers; /* Controller "struct ofconn"s. */
274 struct list all_conns; /* Contains "struct ofconn"s. */
275 struct pvconn **listeners;
277 struct pvconn **snoops;
280 /* Hooks for ovs-vswitchd. */
281 const struct ofhooks *ofhooks;
284 /* Used by default ofhooks. */
285 struct mac_learning *ml;
288 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
290 static const struct ofhooks default_ofhooks;
292 static uint64_t pick_datapath_id(const struct ofproto *);
293 static uint64_t pick_fallback_dpid(void);
295 static void update_used(struct ofproto *);
296 static void update_stats(struct ofproto *, struct rule *,
297 const struct odp_flow_stats *);
298 static void expire_rule(struct cls_rule *, void *ofproto);
299 static void active_timeout(struct ofproto *ofproto, struct rule *rule);
300 static bool revalidate_rule(struct ofproto *p, struct rule *rule);
301 static void revalidate_cb(struct cls_rule *rule_, void *p_);
303 static void handle_odp_msg(struct ofproto *, struct ofpbuf *);
305 static void handle_openflow(struct ofconn *, struct ofproto *,
308 static void refresh_port_groups(struct ofproto *);
310 static void update_port(struct ofproto *, const char *devname);
311 static int init_ports(struct ofproto *);
312 static void reinit_ports(struct ofproto *);
315 ofproto_create(const char *datapath, const char *datapath_type,
316 const struct ofhooks *ofhooks, void *aux,
317 struct ofproto **ofprotop)
319 struct odp_stats stats;
326 /* Connect to datapath and start listening for messages. */
327 error = dpif_open(datapath, datapath_type, &dpif);
329 VLOG_ERR("failed to open datapath %s: %s", datapath, strerror(error));
332 error = dpif_get_dp_stats(dpif, &stats);
334 VLOG_ERR("failed to obtain stats for datapath %s: %s",
335 datapath, strerror(error));
339 error = dpif_recv_set_mask(dpif, ODPL_MISS | ODPL_ACTION | ODPL_SFLOW);
341 VLOG_ERR("failed to listen on datapath %s: %s",
342 datapath, strerror(error));
346 dpif_flow_flush(dpif);
347 dpif_recv_purge(dpif);
349 /* Initialize settings. */
350 p = xzalloc(sizeof *p);
351 p->fallback_dpid = pick_fallback_dpid();
352 p->datapath_id = p->fallback_dpid;
353 p->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
354 p->hw_desc = xstrdup(DEFAULT_HW_DESC);
355 p->sw_desc = xstrdup(DEFAULT_SW_DESC);
356 p->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
357 p->dp_desc = xstrdup(DEFAULT_DP_DESC);
359 /* Initialize datapath. */
361 p->netdev_monitor = netdev_monitor_create();
362 port_array_init(&p->ports);
363 shash_init(&p->port_by_name);
364 p->max_ports = stats.max_ports;
366 /* Initialize submodules. */
367 p->switch_status = switch_status_create(p);
373 /* Initialize flow table. */
374 classifier_init(&p->cls);
375 p->need_revalidate = false;
376 p->next_expiration = time_msec() + 1000;
377 tag_set_init(&p->revalidate_set);
379 /* Initialize OpenFlow connections. */
380 list_init(&p->all_conns);
381 hmap_init(&p->controllers);
387 /* Initialize hooks. */
389 p->ofhooks = ofhooks;
393 p->ofhooks = &default_ofhooks;
395 p->ml = mac_learning_create();
398 /* Pick final datapath ID. */
399 p->datapath_id = pick_datapath_id(p);
400 VLOG_INFO("using datapath ID %016"PRIx64, p->datapath_id);
407 ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id)
409 uint64_t old_dpid = p->datapath_id;
410 p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p);
411 if (p->datapath_id != old_dpid) {
412 struct ofconn *ofconn;
414 VLOG_INFO("datapath ID changed to %016"PRIx64, p->datapath_id);
416 /* Force all active connections to reconnect, since there is no way to
417 * notify a controller that the datapath ID has changed. */
418 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
419 rconn_reconnect(ofconn->rconn);
425 is_discovery_controller(const struct ofproto_controller *c)
427 return !strcmp(c->target, "discover");
431 is_in_band_controller(const struct ofproto_controller *c)
433 return is_discovery_controller(c) || c->band == OFPROTO_IN_BAND;
436 /* Creates a new controller in 'ofproto'. Some of the settings are initially
437 * drawn from 'c', but update_controller() needs to be called later to finish
438 * the new ofconn's configuration. */
440 add_controller(struct ofproto *ofproto, const struct ofproto_controller *c)
442 struct discovery *discovery;
443 struct ofconn *ofconn;
445 if (is_discovery_controller(c)) {
446 int error = discovery_create(c->accept_re, c->update_resolv_conf,
447 ofproto->dpif, ofproto->switch_status,
456 ofconn = ofconn_create(ofproto, rconn_create(5, 8), OFCONN_CONTROLLER);
457 ofconn->pktbuf = pktbuf_create();
458 ofconn->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN;
460 ofconn->discovery = discovery;
462 rconn_connect(ofconn->rconn, c->target);
464 hmap_insert(&ofproto->controllers, &ofconn->hmap_node,
465 hash_string(c->target, 0));
468 /* Reconfigures 'ofconn' to match 'c'. This function cannot update an ofconn's
469 * target or turn discovery on or off (these are done by creating new ofconns
470 * and deleting old ones), but it can update the rest of an ofconn's
473 update_controller(struct ofconn *ofconn, const struct ofproto_controller *c)
475 struct ofproto *ofproto = ofconn->ofproto;
479 ofconn->band = (is_in_band_controller(c)
480 ? OFPROTO_IN_BAND : OFPROTO_OUT_OF_BAND);
482 rconn_set_max_backoff(ofconn->rconn, c->max_backoff);
484 probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0;
485 rconn_set_probe_interval(ofconn->rconn, probe_interval);
487 if (ofconn->discovery) {
488 discovery_set_update_resolv_conf(ofconn->discovery,
489 c->update_resolv_conf);
490 discovery_set_accept_controller_re(ofconn->discovery, c->accept_re);
493 for (i = 0; i < N_SCHEDULERS; i++) {
494 struct pinsched **s = &ofconn->schedulers[i];
496 if (c->rate_limit > 0) {
498 *s = pinsched_create(c->rate_limit, c->burst_limit,
499 ofproto->switch_status);
501 pinsched_set_limits(*s, c->rate_limit, c->burst_limit);
504 pinsched_destroy(*s);
511 ofconn_get_target(const struct ofconn *ofconn)
513 return ofconn->discovery ? "discover" : rconn_get_name(ofconn->rconn);
516 static struct ofconn *
517 find_controller_by_target(struct ofproto *ofproto, const char *target)
519 struct ofconn *ofconn;
521 HMAP_FOR_EACH_WITH_HASH (ofconn, struct ofconn, hmap_node,
522 hash_string(target, 0), &ofproto->controllers) {
523 if (!strcmp(ofconn_get_target(ofconn), target)) {
531 update_in_band_remotes(struct ofproto *ofproto)
533 const struct ofconn *ofconn;
534 struct sockaddr_in *addrs;
535 size_t max_addrs, n_addrs;
539 /* Allocate enough memory for as many remotes as we could possibly have. */
540 max_addrs = ofproto->n_extra_remotes + hmap_count(&ofproto->controllers);
541 addrs = xmalloc(max_addrs * sizeof *addrs);
544 /* Add all the remotes. */
546 HMAP_FOR_EACH (ofconn, struct ofconn, hmap_node, &ofproto->controllers) {
547 struct sockaddr_in *sin = &addrs[n_addrs];
549 if (ofconn->band == OFPROTO_OUT_OF_BAND) {
553 sin->sin_addr.s_addr = rconn_get_remote_ip(ofconn->rconn);
554 if (sin->sin_addr.s_addr) {
555 sin->sin_port = rconn_get_remote_port(ofconn->rconn);
558 if (ofconn->discovery) {
562 for (i = 0; i < ofproto->n_extra_remotes; i++) {
563 addrs[n_addrs++] = ofproto->extra_in_band_remotes[i];
566 /* Create or update or destroy in-band.
568 * Ordinarily we only enable in-band if there's at least one remote
569 * address, but discovery needs the in-band rules for DHCP to be installed
570 * even before we know any remote addresses. */
571 if (n_addrs || discovery) {
572 if (!ofproto->in_band) {
573 in_band_create(ofproto, ofproto->dpif, ofproto->switch_status,
576 if (ofproto->in_band) {
577 in_band_set_remotes(ofproto->in_band, addrs, n_addrs);
579 ofproto->next_in_band_update = time_msec() + 1000;
581 in_band_destroy(ofproto->in_band);
582 ofproto->in_band = NULL;
590 ofproto_set_controllers(struct ofproto *p,
591 const struct ofproto_controller *controllers,
592 size_t n_controllers)
594 struct shash new_controllers;
595 enum ofproto_fail_mode fail_mode;
596 struct ofconn *ofconn, *next;
600 shash_init(&new_controllers);
601 for (i = 0; i < n_controllers; i++) {
602 const struct ofproto_controller *c = &controllers[i];
604 shash_add_once(&new_controllers, c->target, &controllers[i]);
605 if (!find_controller_by_target(p, c->target)) {
606 add_controller(p, c);
610 fail_mode = OFPROTO_FAIL_STANDALONE;
612 HMAP_FOR_EACH_SAFE (ofconn, next, struct ofconn, hmap_node,
614 struct ofproto_controller *c;
616 c = shash_find_data(&new_controllers, ofconn_get_target(ofconn));
618 ofconn_destroy(ofconn);
620 update_controller(ofconn, c);
624 if (c->fail == OFPROTO_FAIL_SECURE) {
625 fail_mode = OFPROTO_FAIL_SECURE;
629 shash_destroy(&new_controllers);
631 update_in_band_remotes(p);
633 if (!hmap_is_empty(&p->controllers)
634 && fail_mode == OFPROTO_FAIL_STANDALONE) {
635 struct rconn **rconns;
639 p->fail_open = fail_open_create(p, p->switch_status);
643 rconns = xmalloc(hmap_count(&p->controllers) * sizeof *rconns);
644 HMAP_FOR_EACH (ofconn, struct ofconn, hmap_node, &p->controllers) {
645 rconns[n++] = ofconn->rconn;
648 fail_open_set_controllers(p->fail_open, rconns, n);
649 /* p->fail_open takes ownership of 'rconns'. */
651 fail_open_destroy(p->fail_open);
655 if (!hmap_is_empty(&p->controllers) && !ss_exists) {
656 ofconn = CONTAINER_OF(hmap_first(&p->controllers),
657 struct ofconn, hmap_node);
658 ofconn->ss = switch_status_register(p->switch_status, "remote",
659 rconn_status_cb, ofconn->rconn);
664 any_extras_changed(const struct ofproto *ofproto,
665 const struct sockaddr_in *extras, size_t n)
669 if (n != ofproto->n_extra_remotes) {
673 for (i = 0; i < n; i++) {
674 const struct sockaddr_in *old = &ofproto->extra_in_band_remotes[i];
675 const struct sockaddr_in *new = &extras[i];
677 if (old->sin_addr.s_addr != new->sin_addr.s_addr ||
678 old->sin_port != new->sin_port) {
686 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s
687 * in-band control should guarantee access, in the same way that in-band
688 * control guarantees access to OpenFlow controllers. */
690 ofproto_set_extra_in_band_remotes(struct ofproto *ofproto,
691 const struct sockaddr_in *extras, size_t n)
693 if (!any_extras_changed(ofproto, extras, n)) {
697 free(ofproto->extra_in_band_remotes);
698 ofproto->n_extra_remotes = n;
699 ofproto->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras);
701 update_in_band_remotes(ofproto);
705 ofproto_set_desc(struct ofproto *p,
706 const char *mfr_desc, const char *hw_desc,
707 const char *sw_desc, const char *serial_desc,
710 struct ofp_desc_stats *ods;
713 if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
714 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
715 sizeof ods->mfr_desc);
718 p->mfr_desc = xstrdup(mfr_desc);
721 if (strlen(hw_desc) >= sizeof ods->hw_desc) {
722 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
723 sizeof ods->hw_desc);
726 p->hw_desc = xstrdup(hw_desc);
729 if (strlen(sw_desc) >= sizeof ods->sw_desc) {
730 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
731 sizeof ods->sw_desc);
734 p->sw_desc = xstrdup(sw_desc);
737 if (strlen(serial_desc) >= sizeof ods->serial_num) {
738 VLOG_WARN("truncating serial_desc, must be less than %zu "
740 sizeof ods->serial_num);
742 free(p->serial_desc);
743 p->serial_desc = xstrdup(serial_desc);
746 if (strlen(dp_desc) >= sizeof ods->dp_desc) {
747 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
748 sizeof ods->dp_desc);
751 p->dp_desc = xstrdup(dp_desc);
756 set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
757 const struct svec *svec)
759 struct pvconn **pvconns = *pvconnsp;
760 size_t n_pvconns = *n_pvconnsp;
764 for (i = 0; i < n_pvconns; i++) {
765 pvconn_close(pvconns[i]);
769 pvconns = xmalloc(svec->n * sizeof *pvconns);
771 for (i = 0; i < svec->n; i++) {
772 const char *name = svec->names[i];
773 struct pvconn *pvconn;
776 error = pvconn_open(name, &pvconn);
778 pvconns[n_pvconns++] = pvconn;
780 VLOG_ERR("failed to listen on %s: %s", name, strerror(error));
788 *n_pvconnsp = n_pvconns;
794 ofproto_set_listeners(struct ofproto *ofproto, const struct svec *listeners)
796 return set_pvconns(&ofproto->listeners, &ofproto->n_listeners, listeners);
800 ofproto_set_snoops(struct ofproto *ofproto, const struct svec *snoops)
802 return set_pvconns(&ofproto->snoops, &ofproto->n_snoops, snoops);
806 ofproto_set_netflow(struct ofproto *ofproto,
807 const struct netflow_options *nf_options)
809 if (nf_options && nf_options->collectors.n) {
810 if (!ofproto->netflow) {
811 ofproto->netflow = netflow_create();
813 return netflow_set_options(ofproto->netflow, nf_options);
815 netflow_destroy(ofproto->netflow);
816 ofproto->netflow = NULL;
822 ofproto_set_sflow(struct ofproto *ofproto,
823 const struct ofproto_sflow_options *oso)
825 struct ofproto_sflow *os = ofproto->sflow;
828 struct ofport *ofport;
829 unsigned int odp_port;
831 os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
832 refresh_port_groups(ofproto);
833 PORT_ARRAY_FOR_EACH (ofport, &ofproto->ports, odp_port) {
834 ofproto_sflow_add_port(os, odp_port,
835 netdev_get_name(ofport->netdev));
838 ofproto_sflow_set_options(os, oso);
840 ofproto_sflow_destroy(os);
841 ofproto->sflow = NULL;
846 ofproto_set_stp(struct ofproto *ofproto OVS_UNUSED, bool enable_stp)
850 VLOG_WARN("STP is not yet implemented");
858 ofproto_get_datapath_id(const struct ofproto *ofproto)
860 return ofproto->datapath_id;
864 ofproto_has_controller(const struct ofproto *ofproto)
866 return !hmap_is_empty(&ofproto->controllers);
870 ofproto_get_listeners(const struct ofproto *ofproto, struct svec *listeners)
874 for (i = 0; i < ofproto->n_listeners; i++) {
875 svec_add(listeners, pvconn_get_name(ofproto->listeners[i]));
880 ofproto_get_snoops(const struct ofproto *ofproto, struct svec *snoops)
884 for (i = 0; i < ofproto->n_snoops; i++) {
885 svec_add(snoops, pvconn_get_name(ofproto->snoops[i]));
890 ofproto_destroy(struct ofproto *p)
892 struct ofconn *ofconn, *next_ofconn;
893 struct ofport *ofport;
894 unsigned int port_no;
901 /* Destroy fail-open and in-band early, since they touch the classifier. */
902 fail_open_destroy(p->fail_open);
905 in_band_destroy(p->in_band);
907 free(p->extra_in_band_remotes);
909 ofproto_flush_flows(p);
910 classifier_destroy(&p->cls);
912 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, struct ofconn, node,
914 ofconn_destroy(ofconn);
916 hmap_destroy(&p->controllers);
919 netdev_monitor_destroy(p->netdev_monitor);
920 PORT_ARRAY_FOR_EACH (ofport, &p->ports, port_no) {
923 shash_destroy(&p->port_by_name);
925 switch_status_destroy(p->switch_status);
926 netflow_destroy(p->netflow);
927 ofproto_sflow_destroy(p->sflow);
929 for (i = 0; i < p->n_listeners; i++) {
930 pvconn_close(p->listeners[i]);
934 for (i = 0; i < p->n_snoops; i++) {
935 pvconn_close(p->snoops[i]);
939 mac_learning_destroy(p->ml);
944 free(p->serial_desc);
947 port_array_destroy(&p->ports);
953 ofproto_run(struct ofproto *p)
955 int error = ofproto_run1(p);
957 error = ofproto_run2(p, false);
963 process_port_change(struct ofproto *ofproto, int error, char *devname)
965 if (error == ENOBUFS) {
966 reinit_ports(ofproto);
968 update_port(ofproto, devname);
973 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
974 * means that 'ofconn' is more interesting for monitoring than a lower return
977 snoop_preference(const struct ofconn *ofconn)
979 switch (ofconn->role) {
987 /* Shouldn't happen. */
992 /* One of ofproto's "snoop" pvconns has accepted a new connection on 'vconn'.
993 * Connects this vconn to a controller. */
995 add_snooper(struct ofproto *ofproto, struct vconn *vconn)
997 struct ofconn *ofconn, *best;
999 /* Pick a controller for monitoring. */
1001 LIST_FOR_EACH (ofconn, struct ofconn, node, &ofproto->all_conns) {
1002 if (ofconn->type == OFCONN_CONTROLLER
1003 && (!best || snoop_preference(ofconn) > snoop_preference(best))) {
1009 rconn_add_monitor(best->rconn, vconn);
1011 VLOG_INFO_RL(&rl, "no controller connection to snoop");
1017 ofproto_run1(struct ofproto *p)
1019 struct ofconn *ofconn, *next_ofconn;
1024 if (shash_is_empty(&p->port_by_name)) {
1028 for (i = 0; i < 50; i++) {
1032 error = dpif_recv(p->dpif, &buf);
1034 if (error == ENODEV) {
1035 /* Someone destroyed the datapath behind our back. The caller
1036 * better destroy us and give up, because we're just going to
1037 * spin from here on out. */
1038 static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5);
1039 VLOG_ERR_RL(&rl2, "%s: datapath was destroyed externally",
1040 dpif_name(p->dpif));
1046 handle_odp_msg(p, buf);
1049 while ((error = dpif_port_poll(p->dpif, &devname)) != EAGAIN) {
1050 process_port_change(p, error, devname);
1052 while ((error = netdev_monitor_poll(p->netdev_monitor,
1053 &devname)) != EAGAIN) {
1054 process_port_change(p, error, devname);
1058 if (time_msec() >= p->next_in_band_update) {
1059 update_in_band_remotes(p);
1061 in_band_run(p->in_band);
1064 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, struct ofconn, node,
1066 ofconn_run(ofconn, p);
1069 /* Fail-open maintenance. Do this after processing the ofconns since
1070 * fail-open checks the status of the controller rconn. */
1072 fail_open_run(p->fail_open);
1075 for (i = 0; i < p->n_listeners; i++) {
1076 struct vconn *vconn;
1079 retval = pvconn_accept(p->listeners[i], OFP_VERSION, &vconn);
1081 struct rconn *rconn;
1083 rconn = rconn_create(60, 0);
1084 rconn_connect_unreliably(rconn, vconn);
1085 ofconn_create(p, rconn, OFCONN_TRANSIENT);
1086 } else if (retval != EAGAIN) {
1087 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
1091 for (i = 0; i < p->n_snoops; i++) {
1092 struct vconn *vconn;
1095 retval = pvconn_accept(p->snoops[i], OFP_VERSION, &vconn);
1097 add_snooper(p, vconn);
1098 } else if (retval != EAGAIN) {
1099 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
1103 if (time_msec() >= p->next_expiration) {
1104 COVERAGE_INC(ofproto_expiration);
1105 p->next_expiration = time_msec() + 1000;
1108 classifier_for_each(&p->cls, CLS_INC_ALL, expire_rule, p);
1110 /* Let the hook know that we're at a stable point: all outstanding data
1111 * in existing flows has been accounted to the account_cb. Thus, the
1112 * hook can now reasonably do operations that depend on having accurate
1113 * flow volume accounting (currently, that's just bond rebalancing). */
1114 if (p->ofhooks->account_checkpoint_cb) {
1115 p->ofhooks->account_checkpoint_cb(p->aux);
1120 netflow_run(p->netflow);
1123 ofproto_sflow_run(p->sflow);
1129 struct revalidate_cbdata {
1130 struct ofproto *ofproto;
1131 bool revalidate_all; /* Revalidate all exact-match rules? */
1132 bool revalidate_subrules; /* Revalidate all exact-match subrules? */
1133 struct tag_set revalidate_set; /* Set of tags to revalidate. */
1137 ofproto_run2(struct ofproto *p, bool revalidate_all)
1139 if (p->need_revalidate || revalidate_all
1140 || !tag_set_is_empty(&p->revalidate_set)) {
1141 struct revalidate_cbdata cbdata;
1143 cbdata.revalidate_all = revalidate_all;
1144 cbdata.revalidate_subrules = p->need_revalidate;
1145 cbdata.revalidate_set = p->revalidate_set;
1146 tag_set_init(&p->revalidate_set);
1147 COVERAGE_INC(ofproto_revalidate);
1148 classifier_for_each(&p->cls, CLS_INC_EXACT, revalidate_cb, &cbdata);
1149 p->need_revalidate = false;
1156 ofproto_wait(struct ofproto *p)
1158 struct ofconn *ofconn;
1161 dpif_recv_wait(p->dpif);
1162 dpif_port_poll_wait(p->dpif);
1163 netdev_monitor_poll_wait(p->netdev_monitor);
1164 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
1165 ofconn_wait(ofconn);
1168 poll_timer_wait_until(p->next_in_band_update);
1169 in_band_wait(p->in_band);
1172 fail_open_wait(p->fail_open);
1175 ofproto_sflow_wait(p->sflow);
1177 if (!tag_set_is_empty(&p->revalidate_set)) {
1178 poll_immediate_wake();
1180 if (p->need_revalidate) {
1181 /* Shouldn't happen, but if it does just go around again. */
1182 VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
1183 poll_immediate_wake();
1184 } else if (p->next_expiration != LLONG_MAX) {
1185 poll_timer_wait_until(p->next_expiration);
1187 for (i = 0; i < p->n_listeners; i++) {
1188 pvconn_wait(p->listeners[i]);
1190 for (i = 0; i < p->n_snoops; i++) {
1191 pvconn_wait(p->snoops[i]);
1196 ofproto_revalidate(struct ofproto *ofproto, tag_type tag)
1198 tag_set_add(&ofproto->revalidate_set, tag);
1202 ofproto_get_revalidate_set(struct ofproto *ofproto)
1204 return &ofproto->revalidate_set;
1208 ofproto_is_alive(const struct ofproto *p)
1210 return !hmap_is_empty(&p->controllers);
1214 ofproto_send_packet(struct ofproto *p, const flow_t *flow,
1215 const union ofp_action *actions, size_t n_actions,
1216 const struct ofpbuf *packet)
1218 struct odp_actions odp_actions;
1221 error = xlate_actions(actions, n_actions, flow, p, packet, &odp_actions,
1227 /* XXX Should we translate the dpif_execute() errno value into an OpenFlow
1229 dpif_execute(p->dpif, flow->in_port, odp_actions.actions,
1230 odp_actions.n_actions, packet);
1235 ofproto_add_flow(struct ofproto *p,
1236 const flow_t *flow, uint32_t wildcards, unsigned int priority,
1237 const union ofp_action *actions, size_t n_actions,
1241 rule = rule_create(p, NULL, actions, n_actions,
1242 idle_timeout >= 0 ? idle_timeout : 5 /* XXX */,
1244 cls_rule_from_flow(flow, wildcards, priority, &rule->cr);
1245 rule_insert(p, rule, NULL, 0);
1249 ofproto_delete_flow(struct ofproto *ofproto, const flow_t *flow,
1250 uint32_t wildcards, unsigned int priority)
1254 rule = rule_from_cls_rule(classifier_find_rule_exactly(&ofproto->cls,
1258 rule_remove(ofproto, rule);
1263 destroy_rule(struct cls_rule *rule_, void *ofproto_)
1265 struct rule *rule = rule_from_cls_rule(rule_);
1266 struct ofproto *ofproto = ofproto_;
1268 /* Mark the flow as not installed, even though it might really be
1269 * installed, so that rule_remove() doesn't bother trying to uninstall it.
1270 * There is no point in uninstalling it individually since we are about to
1271 * blow away all the flows with dpif_flow_flush(). */
1272 rule->installed = false;
1274 rule_remove(ofproto, rule);
1278 ofproto_flush_flows(struct ofproto *ofproto)
1280 COVERAGE_INC(ofproto_flush);
1281 classifier_for_each(&ofproto->cls, CLS_INC_ALL, destroy_rule, ofproto);
1282 dpif_flow_flush(ofproto->dpif);
1283 if (ofproto->in_band) {
1284 in_band_flushed(ofproto->in_band);
1286 if (ofproto->fail_open) {
1287 fail_open_flushed(ofproto->fail_open);
1292 reinit_ports(struct ofproto *p)
1294 struct svec devnames;
1295 struct ofport *ofport;
1296 unsigned int port_no;
1297 struct odp_port *odp_ports;
1301 svec_init(&devnames);
1302 PORT_ARRAY_FOR_EACH (ofport, &p->ports, port_no) {
1303 svec_add (&devnames, (char *) ofport->opp.name);
1305 dpif_port_list(p->dpif, &odp_ports, &n_odp_ports);
1306 for (i = 0; i < n_odp_ports; i++) {
1307 svec_add (&devnames, odp_ports[i].devname);
1311 svec_sort_unique(&devnames);
1312 for (i = 0; i < devnames.n; i++) {
1313 update_port(p, devnames.names[i]);
1315 svec_destroy(&devnames);
1319 refresh_port_group(struct ofproto *p, unsigned int group)
1323 struct ofport *port;
1324 unsigned int port_no;
1326 assert(group == DP_GROUP_ALL || group == DP_GROUP_FLOOD);
1328 ports = xmalloc(port_array_count(&p->ports) * sizeof *ports);
1330 PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
1331 if (group == DP_GROUP_ALL || !(port->opp.config & OFPPC_NO_FLOOD)) {
1332 ports[n_ports++] = port_no;
1335 dpif_port_group_set(p->dpif, group, ports, n_ports);
1342 refresh_port_groups(struct ofproto *p)
1344 size_t n_flood = refresh_port_group(p, DP_GROUP_FLOOD);
1345 size_t n_all = refresh_port_group(p, DP_GROUP_ALL);
1347 ofproto_sflow_set_group_sizes(p->sflow, n_flood, n_all);
1351 static struct ofport *
1352 make_ofport(const struct odp_port *odp_port)
1354 struct netdev_options netdev_options;
1355 enum netdev_flags flags;
1356 struct ofport *ofport;
1357 struct netdev *netdev;
1361 memset(&netdev_options, 0, sizeof netdev_options);
1362 netdev_options.name = odp_port->devname;
1363 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
1365 error = netdev_open(&netdev_options, &netdev);
1367 VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
1368 "cannot be opened (%s)",
1369 odp_port->devname, odp_port->port,
1370 odp_port->devname, strerror(error));
1374 ofport = xmalloc(sizeof *ofport);
1375 ofport->netdev = netdev;
1376 ofport->opp.port_no = odp_port_to_ofp_port(odp_port->port);
1377 netdev_get_etheraddr(netdev, ofport->opp.hw_addr);
1378 memcpy(ofport->opp.name, odp_port->devname,
1379 MIN(sizeof ofport->opp.name, sizeof odp_port->devname));
1380 ofport->opp.name[sizeof ofport->opp.name - 1] = '\0';
1382 netdev_get_flags(netdev, &flags);
1383 ofport->opp.config = flags & NETDEV_UP ? 0 : OFPPC_PORT_DOWN;
1385 netdev_get_carrier(netdev, &carrier);
1386 ofport->opp.state = carrier ? 0 : OFPPS_LINK_DOWN;
1388 netdev_get_features(netdev,
1389 &ofport->opp.curr, &ofport->opp.advertised,
1390 &ofport->opp.supported, &ofport->opp.peer);
1395 ofport_conflicts(const struct ofproto *p, const struct odp_port *odp_port)
1397 if (port_array_get(&p->ports, odp_port->port)) {
1398 VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
1401 } else if (shash_find(&p->port_by_name, odp_port->devname)) {
1402 VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
1411 ofport_equal(const struct ofport *a_, const struct ofport *b_)
1413 const struct ofp_phy_port *a = &a_->opp;
1414 const struct ofp_phy_port *b = &b_->opp;
1416 BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
1417 return (a->port_no == b->port_no
1418 && !memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
1419 && !strcmp((char *) a->name, (char *) b->name)
1420 && a->state == b->state
1421 && a->config == b->config
1422 && a->curr == b->curr
1423 && a->advertised == b->advertised
1424 && a->supported == b->supported
1425 && a->peer == b->peer);
1429 send_port_status(struct ofproto *p, const struct ofport *ofport,
1432 /* XXX Should limit the number of queued port status change messages. */
1433 struct ofconn *ofconn;
1434 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
1435 struct ofp_port_status *ops;
1438 if (!ofconn_receives_async_msgs(ofconn)) {
1442 ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b);
1443 ops->reason = reason;
1444 ops->desc = ofport->opp;
1445 hton_ofp_phy_port(&ops->desc);
1446 queue_tx(b, ofconn, NULL);
1448 if (p->ofhooks->port_changed_cb) {
1449 p->ofhooks->port_changed_cb(reason, &ofport->opp, p->aux);
1454 ofport_install(struct ofproto *p, struct ofport *ofport)
1456 uint16_t odp_port = ofp_port_to_odp_port(ofport->opp.port_no);
1457 const char *netdev_name = (const char *) ofport->opp.name;
1459 netdev_monitor_add(p->netdev_monitor, ofport->netdev);
1460 port_array_set(&p->ports, odp_port, ofport);
1461 shash_add(&p->port_by_name, netdev_name, ofport);
1463 ofproto_sflow_add_port(p->sflow, odp_port, netdev_name);
1468 ofport_remove(struct ofproto *p, struct ofport *ofport)
1470 uint16_t odp_port = ofp_port_to_odp_port(ofport->opp.port_no);
1472 netdev_monitor_remove(p->netdev_monitor, ofport->netdev);
1473 port_array_set(&p->ports, odp_port, NULL);
1474 shash_delete(&p->port_by_name,
1475 shash_find(&p->port_by_name, (char *) ofport->opp.name));
1477 ofproto_sflow_del_port(p->sflow, odp_port);
1482 ofport_free(struct ofport *ofport)
1485 netdev_close(ofport->netdev);
1491 update_port(struct ofproto *p, const char *devname)
1493 struct odp_port odp_port;
1494 struct ofport *old_ofport;
1495 struct ofport *new_ofport;
1498 COVERAGE_INC(ofproto_update_port);
1500 /* Query the datapath for port information. */
1501 error = dpif_port_query_by_name(p->dpif, devname, &odp_port);
1503 /* Find the old ofport. */
1504 old_ofport = shash_find_data(&p->port_by_name, devname);
1507 /* There's no port named 'devname' but there might be a port with
1508 * the same port number. This could happen if a port is deleted
1509 * and then a new one added in its place very quickly, or if a port
1510 * is renamed. In the former case we want to send an OFPPR_DELETE
1511 * and an OFPPR_ADD, and in the latter case we want to send a
1512 * single OFPPR_MODIFY. We can distinguish the cases by comparing
1513 * the old port's ifindex against the new port, or perhaps less
1514 * reliably but more portably by comparing the old port's MAC
1515 * against the new port's MAC. However, this code isn't that smart
1516 * and always sends an OFPPR_MODIFY (XXX). */
1517 old_ofport = port_array_get(&p->ports, odp_port.port);
1519 } else if (error != ENOENT && error != ENODEV) {
1520 VLOG_WARN_RL(&rl, "dpif_port_query_by_name returned unexpected error "
1521 "%s", strerror(error));
1525 /* Create a new ofport. */
1526 new_ofport = !error ? make_ofport(&odp_port) : NULL;
1528 /* Eliminate a few pathological cases. */
1529 if (!old_ofport && !new_ofport) {
1531 } else if (old_ofport && new_ofport) {
1532 /* Most of the 'config' bits are OpenFlow soft state, but
1533 * OFPPC_PORT_DOWN is maintained the kernel. So transfer the OpenFlow
1534 * bits from old_ofport. (make_ofport() only sets OFPPC_PORT_DOWN and
1535 * leaves the other bits 0.) */
1536 new_ofport->opp.config |= old_ofport->opp.config & ~OFPPC_PORT_DOWN;
1538 if (ofport_equal(old_ofport, new_ofport)) {
1539 /* False alarm--no change. */
1540 ofport_free(new_ofport);
1545 /* Now deal with the normal cases. */
1547 ofport_remove(p, old_ofport);
1550 ofport_install(p, new_ofport);
1552 send_port_status(p, new_ofport ? new_ofport : old_ofport,
1553 (!old_ofport ? OFPPR_ADD
1554 : !new_ofport ? OFPPR_DELETE
1556 ofport_free(old_ofport);
1558 /* Update port groups. */
1559 refresh_port_groups(p);
1563 init_ports(struct ofproto *p)
1565 struct odp_port *ports;
1570 error = dpif_port_list(p->dpif, &ports, &n_ports);
1575 for (i = 0; i < n_ports; i++) {
1576 const struct odp_port *odp_port = &ports[i];
1577 if (!ofport_conflicts(p, odp_port)) {
1578 struct ofport *ofport = make_ofport(odp_port);
1580 ofport_install(p, ofport);
1585 refresh_port_groups(p);
1589 static struct ofconn *
1590 ofconn_create(struct ofproto *p, struct rconn *rconn, enum ofconn_type type)
1592 struct ofconn *ofconn = xzalloc(sizeof *ofconn);
1593 ofconn->ofproto = p;
1594 list_push_back(&p->all_conns, &ofconn->node);
1595 ofconn->rconn = rconn;
1596 ofconn->type = type;
1597 ofconn->role = NX_ROLE_OTHER;
1598 ofconn->packet_in_counter = rconn_packet_counter_create ();
1599 ofconn->pktbuf = NULL;
1600 ofconn->miss_send_len = 0;
1601 ofconn->reply_counter = rconn_packet_counter_create ();
1606 ofconn_destroy(struct ofconn *ofconn)
1608 if (ofconn->type == OFCONN_CONTROLLER) {
1609 hmap_remove(&ofconn->ofproto->controllers, &ofconn->hmap_node);
1611 discovery_destroy(ofconn->discovery);
1613 list_remove(&ofconn->node);
1614 switch_status_unregister(ofconn->ss);
1615 rconn_destroy(ofconn->rconn);
1616 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1617 rconn_packet_counter_destroy(ofconn->reply_counter);
1618 pktbuf_destroy(ofconn->pktbuf);
1623 ofconn_run(struct ofconn *ofconn, struct ofproto *p)
1628 if (ofconn->discovery) {
1629 char *controller_name;
1630 if (rconn_is_connectivity_questionable(ofconn->rconn)) {
1631 discovery_question_connectivity(ofconn->discovery);
1633 if (discovery_run(ofconn->discovery, &controller_name)) {
1634 if (controller_name) {
1635 rconn_connect(ofconn->rconn, controller_name);
1637 rconn_disconnect(ofconn->rconn);
1642 for (i = 0; i < N_SCHEDULERS; i++) {
1643 pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn);
1646 rconn_run(ofconn->rconn);
1648 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1649 /* Limit the number of iterations to prevent other tasks from
1651 for (iteration = 0; iteration < 50; iteration++) {
1652 struct ofpbuf *of_msg = rconn_recv(ofconn->rconn);
1657 fail_open_maybe_recover(p->fail_open);
1659 handle_openflow(ofconn, p, of_msg);
1660 ofpbuf_delete(of_msg);
1664 if (!ofconn->discovery && !rconn_is_alive(ofconn->rconn)) {
1665 ofconn_destroy(ofconn);
1670 ofconn_wait(struct ofconn *ofconn)
1674 if (ofconn->discovery) {
1675 discovery_wait(ofconn->discovery);
1677 for (i = 0; i < N_SCHEDULERS; i++) {
1678 pinsched_wait(ofconn->schedulers[i]);
1680 rconn_run_wait(ofconn->rconn);
1681 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1682 rconn_recv_wait(ofconn->rconn);
1684 COVERAGE_INC(ofproto_ofconn_stuck);
1688 /* Returns true if 'ofconn' should receive asynchronous messages. */
1690 ofconn_receives_async_msgs(const struct ofconn *ofconn)
1692 if (ofconn->type == OFCONN_CONTROLLER) {
1693 /* Ordinary controllers always get asynchronous messages unless they
1694 * have configured themselves as "slaves". */
1695 return ofconn->role != NX_ROLE_SLAVE;
1697 /* Transient connections don't get asynchronous messages unless they
1698 * have explicitly asked for them by setting a nonzero miss send
1700 return ofconn->miss_send_len > 0;
1704 /* Caller is responsible for initializing the 'cr' member of the returned
1706 static struct rule *
1707 rule_create(struct ofproto *ofproto, struct rule *super,
1708 const union ofp_action *actions, size_t n_actions,
1709 uint16_t idle_timeout, uint16_t hard_timeout,
1710 uint64_t flow_cookie, bool send_flow_removed)
1712 struct rule *rule = xzalloc(sizeof *rule);
1713 rule->idle_timeout = idle_timeout;
1714 rule->hard_timeout = hard_timeout;
1715 rule->flow_cookie = flow_cookie;
1716 rule->used = rule->created = time_msec();
1717 rule->send_flow_removed = send_flow_removed;
1718 rule->super = super;
1720 list_push_back(&super->list, &rule->list);
1722 list_init(&rule->list);
1724 rule->n_actions = n_actions;
1725 rule->actions = xmemdup(actions, n_actions * sizeof *actions);
1726 netflow_flow_clear(&rule->nf_flow);
1727 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->created);
1732 static struct rule *
1733 rule_from_cls_rule(const struct cls_rule *cls_rule)
1735 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
1739 rule_free(struct rule *rule)
1741 free(rule->actions);
1742 free(rule->odp_actions);
1746 /* Destroys 'rule'. If 'rule' is a subrule, also removes it from its
1747 * super-rule's list of subrules. If 'rule' is a super-rule, also iterates
1748 * through all of its subrules and revalidates them, destroying any that no
1749 * longer has a super-rule (which is probably all of them).
1751 * Before calling this function, the caller must make have removed 'rule' from
1752 * the classifier. If 'rule' is an exact-match rule, the caller is also
1753 * responsible for ensuring that it has been uninstalled from the datapath. */
1755 rule_destroy(struct ofproto *ofproto, struct rule *rule)
1758 struct rule *subrule, *next;
1759 LIST_FOR_EACH_SAFE (subrule, next, struct rule, list, &rule->list) {
1760 revalidate_rule(ofproto, subrule);
1763 list_remove(&rule->list);
1769 rule_has_out_port(const struct rule *rule, uint16_t out_port)
1771 const union ofp_action *oa;
1772 struct actions_iterator i;
1774 if (out_port == htons(OFPP_NONE)) {
1777 for (oa = actions_first(&i, rule->actions, rule->n_actions); oa;
1778 oa = actions_next(&i)) {
1779 if (oa->type == htons(OFPAT_OUTPUT) && oa->output.port == out_port) {
1786 /* Executes the actions indicated by 'rule' on 'packet', which is in flow
1787 * 'flow' and is considered to have arrived on ODP port 'in_port'.
1789 * The flow that 'packet' actually contains does not need to actually match
1790 * 'rule'; the actions in 'rule' will be applied to it either way. Likewise,
1791 * the packet and byte counters for 'rule' will be credited for the packet sent
1792 * out whether or not the packet actually matches 'rule'.
1794 * If 'rule' is an exact-match rule and 'flow' actually equals the rule's flow,
1795 * the caller must already have accurately composed ODP actions for it given
1796 * 'packet' using rule_make_actions(). If 'rule' is a wildcard rule, or if
1797 * 'rule' is an exact-match rule but 'flow' is not the rule's flow, then this
1798 * function will compose a set of ODP actions based on 'rule''s OpenFlow
1799 * actions and apply them to 'packet'. */
1801 rule_execute(struct ofproto *ofproto, struct rule *rule,
1802 struct ofpbuf *packet, const flow_t *flow)
1804 const union odp_action *actions;
1806 struct odp_actions a;
1808 /* Grab or compose the ODP actions.
1810 * The special case for an exact-match 'rule' where 'flow' is not the
1811 * rule's flow is important to avoid, e.g., sending a packet out its input
1812 * port simply because the ODP actions were composed for the wrong
1814 if (rule->cr.wc.wildcards || !flow_equal(flow, &rule->cr.flow)) {
1815 struct rule *super = rule->super ? rule->super : rule;
1816 if (xlate_actions(super->actions, super->n_actions, flow, ofproto,
1817 packet, &a, NULL, 0, NULL)) {
1820 actions = a.actions;
1821 n_actions = a.n_actions;
1823 actions = rule->odp_actions;
1824 n_actions = rule->n_odp_actions;
1827 /* Execute the ODP actions. */
1828 if (!dpif_execute(ofproto->dpif, flow->in_port,
1829 actions, n_actions, packet)) {
1830 struct odp_flow_stats stats;
1831 flow_extract_stats(flow, packet, &stats);
1832 update_stats(ofproto, rule, &stats);
1833 rule->used = time_msec();
1834 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->used);
1839 rule_insert(struct ofproto *p, struct rule *rule, struct ofpbuf *packet,
1842 struct rule *displaced_rule;
1844 /* Insert the rule in the classifier. */
1845 displaced_rule = rule_from_cls_rule(classifier_insert(&p->cls, &rule->cr));
1846 if (!rule->cr.wc.wildcards) {
1847 rule_make_actions(p, rule, packet);
1850 /* Send the packet and credit it to the rule. */
1853 flow_extract(packet, 0, in_port, &flow);
1854 rule_execute(p, rule, packet, &flow);
1857 /* Install the rule in the datapath only after sending the packet, to
1858 * avoid packet reordering. */
1859 if (rule->cr.wc.wildcards) {
1860 COVERAGE_INC(ofproto_add_wc_flow);
1861 p->need_revalidate = true;
1863 rule_install(p, rule, displaced_rule);
1866 /* Free the rule that was displaced, if any. */
1867 if (displaced_rule) {
1868 rule_destroy(p, displaced_rule);
1872 static struct rule *
1873 rule_create_subrule(struct ofproto *ofproto, struct rule *rule,
1876 struct rule *subrule = rule_create(ofproto, rule, NULL, 0,
1877 rule->idle_timeout, rule->hard_timeout,
1879 COVERAGE_INC(ofproto_subrule_create);
1880 cls_rule_from_flow(flow, 0, (rule->cr.priority <= UINT16_MAX ? UINT16_MAX
1881 : rule->cr.priority), &subrule->cr);
1882 classifier_insert_exact(&ofproto->cls, &subrule->cr);
1888 rule_remove(struct ofproto *ofproto, struct rule *rule)
1890 if (rule->cr.wc.wildcards) {
1891 COVERAGE_INC(ofproto_del_wc_flow);
1892 ofproto->need_revalidate = true;
1894 rule_uninstall(ofproto, rule);
1896 classifier_remove(&ofproto->cls, &rule->cr);
1897 rule_destroy(ofproto, rule);
1900 /* Returns true if the actions changed, false otherwise. */
1902 rule_make_actions(struct ofproto *p, struct rule *rule,
1903 const struct ofpbuf *packet)
1905 const struct rule *super;
1906 struct odp_actions a;
1909 assert(!rule->cr.wc.wildcards);
1911 super = rule->super ? rule->super : rule;
1913 xlate_actions(super->actions, super->n_actions, &rule->cr.flow, p,
1914 packet, &a, &rule->tags, &rule->may_install,
1915 &rule->nf_flow.output_iface);
1917 actions_len = a.n_actions * sizeof *a.actions;
1918 if (rule->n_odp_actions != a.n_actions
1919 || memcmp(rule->odp_actions, a.actions, actions_len)) {
1920 COVERAGE_INC(ofproto_odp_unchanged);
1921 free(rule->odp_actions);
1922 rule->n_odp_actions = a.n_actions;
1923 rule->odp_actions = xmemdup(a.actions, actions_len);
1931 do_put_flow(struct ofproto *ofproto, struct rule *rule, int flags,
1932 struct odp_flow_put *put)
1934 memset(&put->flow.stats, 0, sizeof put->flow.stats);
1935 put->flow.key = rule->cr.flow;
1936 put->flow.actions = rule->odp_actions;
1937 put->flow.n_actions = rule->n_odp_actions;
1938 put->flow.flags = 0;
1940 return dpif_flow_put(ofproto->dpif, put);
1944 rule_install(struct ofproto *p, struct rule *rule, struct rule *displaced_rule)
1946 assert(!rule->cr.wc.wildcards);
1948 if (rule->may_install) {
1949 struct odp_flow_put put;
1950 if (!do_put_flow(p, rule,
1951 ODPPF_CREATE | ODPPF_MODIFY | ODPPF_ZERO_STATS,
1953 rule->installed = true;
1954 if (displaced_rule) {
1955 update_stats(p, displaced_rule, &put.flow.stats);
1956 rule_post_uninstall(p, displaced_rule);
1959 } else if (displaced_rule) {
1960 rule_uninstall(p, displaced_rule);
1965 rule_reinstall(struct ofproto *ofproto, struct rule *rule)
1967 if (rule->installed) {
1968 struct odp_flow_put put;
1969 COVERAGE_INC(ofproto_dp_missed);
1970 do_put_flow(ofproto, rule, ODPPF_CREATE | ODPPF_MODIFY, &put);
1972 rule_install(ofproto, rule, NULL);
1977 rule_update_actions(struct ofproto *ofproto, struct rule *rule)
1979 bool actions_changed;
1980 uint16_t new_out_iface, old_out_iface;
1982 old_out_iface = rule->nf_flow.output_iface;
1983 actions_changed = rule_make_actions(ofproto, rule, NULL);
1985 if (rule->may_install) {
1986 if (rule->installed) {
1987 if (actions_changed) {
1988 struct odp_flow_put put;
1989 do_put_flow(ofproto, rule, ODPPF_CREATE | ODPPF_MODIFY
1990 | ODPPF_ZERO_STATS, &put);
1991 update_stats(ofproto, rule, &put.flow.stats);
1993 /* Temporarily set the old output iface so that NetFlow
1994 * messages have the correct output interface for the old
1996 new_out_iface = rule->nf_flow.output_iface;
1997 rule->nf_flow.output_iface = old_out_iface;
1998 rule_post_uninstall(ofproto, rule);
1999 rule->nf_flow.output_iface = new_out_iface;
2002 rule_install(ofproto, rule, NULL);
2005 rule_uninstall(ofproto, rule);
2010 rule_account(struct ofproto *ofproto, struct rule *rule, uint64_t extra_bytes)
2012 uint64_t total_bytes = rule->byte_count + extra_bytes;
2014 if (ofproto->ofhooks->account_flow_cb
2015 && total_bytes > rule->accounted_bytes)
2017 ofproto->ofhooks->account_flow_cb(
2018 &rule->cr.flow, rule->odp_actions, rule->n_odp_actions,
2019 total_bytes - rule->accounted_bytes, ofproto->aux);
2020 rule->accounted_bytes = total_bytes;
2025 rule_uninstall(struct ofproto *p, struct rule *rule)
2027 assert(!rule->cr.wc.wildcards);
2028 if (rule->installed) {
2029 struct odp_flow odp_flow;
2031 odp_flow.key = rule->cr.flow;
2032 odp_flow.actions = NULL;
2033 odp_flow.n_actions = 0;
2035 if (!dpif_flow_del(p->dpif, &odp_flow)) {
2036 update_stats(p, rule, &odp_flow.stats);
2038 rule->installed = false;
2040 rule_post_uninstall(p, rule);
2045 is_controller_rule(struct rule *rule)
2047 /* If the only action is send to the controller then don't report
2048 * NetFlow expiration messages since it is just part of the control
2049 * logic for the network and not real traffic. */
2051 if (rule && rule->super) {
2052 struct rule *super = rule->super;
2054 return super->n_actions == 1 &&
2055 super->actions[0].type == htons(OFPAT_OUTPUT) &&
2056 super->actions[0].output.port == htons(OFPP_CONTROLLER);
2063 rule_post_uninstall(struct ofproto *ofproto, struct rule *rule)
2065 struct rule *super = rule->super;
2067 rule_account(ofproto, rule, 0);
2069 if (ofproto->netflow && !is_controller_rule(rule)) {
2070 struct ofexpired expired;
2071 expired.flow = rule->cr.flow;
2072 expired.packet_count = rule->packet_count;
2073 expired.byte_count = rule->byte_count;
2074 expired.used = rule->used;
2075 netflow_expire(ofproto->netflow, &rule->nf_flow, &expired);
2078 super->packet_count += rule->packet_count;
2079 super->byte_count += rule->byte_count;
2081 /* Reset counters to prevent double counting if the rule ever gets
2083 rule->packet_count = 0;
2084 rule->byte_count = 0;
2085 rule->accounted_bytes = 0;
2087 netflow_flow_clear(&rule->nf_flow);
2092 queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
2093 struct rconn_packet_counter *counter)
2095 update_openflow_length(msg);
2096 if (rconn_send(ofconn->rconn, msg, counter)) {
2102 send_error(const struct ofconn *ofconn, const struct ofp_header *oh,
2103 int error, const void *data, size_t len)
2106 struct ofp_error_msg *oem;
2108 if (!(error >> 16)) {
2109 VLOG_WARN_RL(&rl, "not sending bad error code %d to controller",
2114 COVERAGE_INC(ofproto_error);
2115 oem = make_openflow_xid(len + sizeof *oem, OFPT_ERROR,
2116 oh ? oh->xid : 0, &buf);
2117 oem->type = htons((unsigned int) error >> 16);
2118 oem->code = htons(error & 0xffff);
2119 memcpy(oem->data, data, len);
2120 queue_tx(buf, ofconn, ofconn->reply_counter);
2124 send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh,
2127 size_t oh_length = ntohs(oh->length);
2128 send_error(ofconn, oh, error, oh, MIN(oh_length, 64));
2132 hton_ofp_phy_port(struct ofp_phy_port *opp)
2134 opp->port_no = htons(opp->port_no);
2135 opp->config = htonl(opp->config);
2136 opp->state = htonl(opp->state);
2137 opp->curr = htonl(opp->curr);
2138 opp->advertised = htonl(opp->advertised);
2139 opp->supported = htonl(opp->supported);
2140 opp->peer = htonl(opp->peer);
2144 handle_echo_request(struct ofconn *ofconn, struct ofp_header *oh)
2146 struct ofp_header *rq = oh;
2147 queue_tx(make_echo_reply(rq), ofconn, ofconn->reply_counter);
2152 handle_features_request(struct ofproto *p, struct ofconn *ofconn,
2153 struct ofp_header *oh)
2155 struct ofp_switch_features *osf;
2157 unsigned int port_no;
2158 struct ofport *port;
2160 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
2161 osf->datapath_id = htonll(p->datapath_id);
2162 osf->n_buffers = htonl(pktbuf_capacity());
2164 osf->capabilities = htonl(OFPC_FLOW_STATS | OFPC_TABLE_STATS |
2165 OFPC_PORT_STATS | OFPC_ARP_MATCH_IP);
2166 osf->actions = htonl((1u << OFPAT_OUTPUT) |
2167 (1u << OFPAT_SET_VLAN_VID) |
2168 (1u << OFPAT_SET_VLAN_PCP) |
2169 (1u << OFPAT_STRIP_VLAN) |
2170 (1u << OFPAT_SET_DL_SRC) |
2171 (1u << OFPAT_SET_DL_DST) |
2172 (1u << OFPAT_SET_NW_SRC) |
2173 (1u << OFPAT_SET_NW_DST) |
2174 (1u << OFPAT_SET_NW_TOS) |
2175 (1u << OFPAT_SET_TP_SRC) |
2176 (1u << OFPAT_SET_TP_DST));
2178 PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
2179 hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
2182 queue_tx(buf, ofconn, ofconn->reply_counter);
2187 handle_get_config_request(struct ofproto *p, struct ofconn *ofconn,
2188 struct ofp_header *oh)
2191 struct ofp_switch_config *osc;
2195 /* Figure out flags. */
2196 dpif_get_drop_frags(p->dpif, &drop_frags);
2197 flags = drop_frags ? OFPC_FRAG_DROP : OFPC_FRAG_NORMAL;
2200 osc = make_openflow_xid(sizeof *osc, OFPT_GET_CONFIG_REPLY, oh->xid, &buf);
2201 osc->flags = htons(flags);
2202 osc->miss_send_len = htons(ofconn->miss_send_len);
2203 queue_tx(buf, ofconn, ofconn->reply_counter);
2209 handle_set_config(struct ofproto *p, struct ofconn *ofconn,
2210 struct ofp_switch_config *osc)
2215 error = check_ofp_message(&osc->header, OFPT_SET_CONFIG, sizeof *osc);
2219 flags = ntohs(osc->flags);
2221 if (ofconn->type == OFCONN_CONTROLLER && ofconn->role != NX_ROLE_SLAVE) {
2222 switch (flags & OFPC_FRAG_MASK) {
2223 case OFPC_FRAG_NORMAL:
2224 dpif_set_drop_frags(p->dpif, false);
2226 case OFPC_FRAG_DROP:
2227 dpif_set_drop_frags(p->dpif, true);
2230 VLOG_WARN_RL(&rl, "requested bad fragment mode (flags=%"PRIx16")",
2236 ofconn->miss_send_len = ntohs(osc->miss_send_len);
2242 add_output_group_action(struct odp_actions *actions, uint16_t group,
2243 uint16_t *nf_output_iface)
2245 odp_actions_add(actions, ODPAT_OUTPUT_GROUP)->output_group.group = group;
2247 if (group == DP_GROUP_ALL || group == DP_GROUP_FLOOD) {
2248 *nf_output_iface = NF_OUT_FLOOD;
2253 add_controller_action(struct odp_actions *actions,
2254 const struct ofp_action_output *oao)
2256 union odp_action *a = odp_actions_add(actions, ODPAT_CONTROLLER);
2257 a->controller.arg = ntohs(oao->max_len);
2260 struct action_xlate_ctx {
2262 flow_t flow; /* Flow to which these actions correspond. */
2263 int recurse; /* Recursion level, via xlate_table_action. */
2264 struct ofproto *ofproto;
2265 const struct ofpbuf *packet; /* The packet corresponding to 'flow', or a
2266 * null pointer if we are revalidating
2267 * without a packet to refer to. */
2270 struct odp_actions *out; /* Datapath actions. */
2271 tag_type *tags; /* Tags associated with OFPP_NORMAL actions. */
2272 bool may_set_up_flow; /* True ordinarily; false if the actions must
2273 * be reassessed for every packet. */
2274 uint16_t nf_output_iface; /* Output interface index for NetFlow. */
2277 static void do_xlate_actions(const union ofp_action *in, size_t n_in,
2278 struct action_xlate_ctx *ctx);
2281 add_output_action(struct action_xlate_ctx *ctx, uint16_t port)
2283 const struct ofport *ofport = port_array_get(&ctx->ofproto->ports, port);
2286 if (ofport->opp.config & OFPPC_NO_FWD) {
2287 /* Forwarding disabled on port. */
2292 * We don't have an ofport record for this port, but it doesn't hurt to
2293 * allow forwarding to it anyhow. Maybe such a port will appear later
2294 * and we're pre-populating the flow table.
2298 odp_actions_add(ctx->out, ODPAT_OUTPUT)->output.port = port;
2299 ctx->nf_output_iface = port;
2302 static struct rule *
2303 lookup_valid_rule(struct ofproto *ofproto, const flow_t *flow)
2306 rule = rule_from_cls_rule(classifier_lookup(&ofproto->cls, flow));
2308 /* The rule we found might not be valid, since we could be in need of
2309 * revalidation. If it is not valid, don't return it. */
2312 && ofproto->need_revalidate
2313 && !revalidate_rule(ofproto, rule)) {
2314 COVERAGE_INC(ofproto_invalidated);
2322 xlate_table_action(struct action_xlate_ctx *ctx, uint16_t in_port)
2324 if (!ctx->recurse) {
2325 uint16_t old_in_port;
2328 /* Look up a flow with 'in_port' as the input port. Then restore the
2329 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2330 * have surprising behavior). */
2331 old_in_port = ctx->flow.in_port;
2332 ctx->flow.in_port = in_port;
2333 rule = lookup_valid_rule(ctx->ofproto, &ctx->flow);
2334 ctx->flow.in_port = old_in_port;
2342 do_xlate_actions(rule->actions, rule->n_actions, ctx);
2349 xlate_output_action(struct action_xlate_ctx *ctx,
2350 const struct ofp_action_output *oao)
2353 uint16_t prev_nf_output_iface = ctx->nf_output_iface;
2355 ctx->nf_output_iface = NF_OUT_DROP;
2357 switch (ntohs(oao->port)) {
2359 add_output_action(ctx, ctx->flow.in_port);
2362 xlate_table_action(ctx, ctx->flow.in_port);
2365 if (!ctx->ofproto->ofhooks->normal_cb(&ctx->flow, ctx->packet,
2366 ctx->out, ctx->tags,
2367 &ctx->nf_output_iface,
2368 ctx->ofproto->aux)) {
2369 COVERAGE_INC(ofproto_uninstallable);
2370 ctx->may_set_up_flow = false;
2374 add_output_group_action(ctx->out, DP_GROUP_FLOOD,
2375 &ctx->nf_output_iface);
2378 add_output_group_action(ctx->out, DP_GROUP_ALL, &ctx->nf_output_iface);
2380 case OFPP_CONTROLLER:
2381 add_controller_action(ctx->out, oao);
2384 add_output_action(ctx, ODPP_LOCAL);
2387 odp_port = ofp_port_to_odp_port(ntohs(oao->port));
2388 if (odp_port != ctx->flow.in_port) {
2389 add_output_action(ctx, odp_port);
2394 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2395 ctx->nf_output_iface = NF_OUT_FLOOD;
2396 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
2397 ctx->nf_output_iface = prev_nf_output_iface;
2398 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2399 ctx->nf_output_iface != NF_OUT_FLOOD) {
2400 ctx->nf_output_iface = NF_OUT_MULTI;
2405 xlate_nicira_action(struct action_xlate_ctx *ctx,
2406 const struct nx_action_header *nah)
2408 const struct nx_action_resubmit *nar;
2409 const struct nx_action_set_tunnel *nast;
2410 union odp_action *oa;
2411 int subtype = ntohs(nah->subtype);
2413 assert(nah->vendor == htonl(NX_VENDOR_ID));
2415 case NXAST_RESUBMIT:
2416 nar = (const struct nx_action_resubmit *) nah;
2417 xlate_table_action(ctx, ofp_port_to_odp_port(ntohs(nar->in_port)));
2420 case NXAST_SET_TUNNEL:
2421 nast = (const struct nx_action_set_tunnel *) nah;
2422 oa = odp_actions_add(ctx->out, ODPAT_SET_TUNNEL);
2423 ctx->flow.tun_id = oa->tunnel.tun_id = nast->tun_id;
2426 /* If you add a new action here that modifies flow data, don't forget to
2427 * update the flow key in ctx->flow in the same key. */
2430 VLOG_DBG_RL(&rl, "unknown Nicira action type %"PRIu16, subtype);
2436 do_xlate_actions(const union ofp_action *in, size_t n_in,
2437 struct action_xlate_ctx *ctx)
2439 struct actions_iterator iter;
2440 const union ofp_action *ia;
2441 const struct ofport *port;
2443 port = port_array_get(&ctx->ofproto->ports, ctx->flow.in_port);
2444 if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
2445 port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, stp_eth_addr)
2446 ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
2447 /* Drop this flow. */
2451 for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
2452 uint16_t type = ntohs(ia->type);
2453 union odp_action *oa;
2457 xlate_output_action(ctx, &ia->output);
2460 case OFPAT_SET_VLAN_VID:
2461 oa = odp_actions_add(ctx->out, ODPAT_SET_VLAN_VID);
2462 ctx->flow.dl_vlan = oa->vlan_vid.vlan_vid = ia->vlan_vid.vlan_vid;
2465 case OFPAT_SET_VLAN_PCP:
2466 oa = odp_actions_add(ctx->out, ODPAT_SET_VLAN_PCP);
2467 ctx->flow.dl_vlan_pcp = oa->vlan_pcp.vlan_pcp = ia->vlan_pcp.vlan_pcp;
2470 case OFPAT_STRIP_VLAN:
2471 odp_actions_add(ctx->out, ODPAT_STRIP_VLAN);
2472 ctx->flow.dl_vlan = OFP_VLAN_NONE;
2473 ctx->flow.dl_vlan_pcp = 0;
2476 case OFPAT_SET_DL_SRC:
2477 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_SRC);
2478 memcpy(oa->dl_addr.dl_addr,
2479 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2480 memcpy(ctx->flow.dl_src,
2481 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2484 case OFPAT_SET_DL_DST:
2485 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_DST);
2486 memcpy(oa->dl_addr.dl_addr,
2487 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2488 memcpy(ctx->flow.dl_dst,
2489 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2492 case OFPAT_SET_NW_SRC:
2493 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_SRC);
2494 ctx->flow.nw_src = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
2497 case OFPAT_SET_NW_DST:
2498 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_DST);
2499 ctx->flow.nw_dst = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
2502 case OFPAT_SET_NW_TOS:
2503 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_TOS);
2504 ctx->flow.nw_tos = oa->nw_tos.nw_tos = ia->nw_tos.nw_tos;
2507 case OFPAT_SET_TP_SRC:
2508 oa = odp_actions_add(ctx->out, ODPAT_SET_TP_SRC);
2509 ctx->flow.tp_src = oa->tp_port.tp_port = ia->tp_port.tp_port;
2512 case OFPAT_SET_TP_DST:
2513 oa = odp_actions_add(ctx->out, ODPAT_SET_TP_DST);
2514 ctx->flow.tp_dst = oa->tp_port.tp_port = ia->tp_port.tp_port;
2518 xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
2522 VLOG_DBG_RL(&rl, "unknown action type %"PRIu16, type);
2529 xlate_actions(const union ofp_action *in, size_t n_in,
2530 const flow_t *flow, struct ofproto *ofproto,
2531 const struct ofpbuf *packet,
2532 struct odp_actions *out, tag_type *tags, bool *may_set_up_flow,
2533 uint16_t *nf_output_iface)
2535 tag_type no_tags = 0;
2536 struct action_xlate_ctx ctx;
2537 COVERAGE_INC(ofproto_ofp2odp);
2538 odp_actions_init(out);
2541 ctx.ofproto = ofproto;
2542 ctx.packet = packet;
2544 ctx.tags = tags ? tags : &no_tags;
2545 ctx.may_set_up_flow = true;
2546 ctx.nf_output_iface = NF_OUT_DROP;
2547 do_xlate_actions(in, n_in, &ctx);
2549 /* Check with in-band control to see if we're allowed to set up this
2551 if (!in_band_rule_check(ofproto->in_band, flow, out)) {
2552 ctx.may_set_up_flow = false;
2555 if (may_set_up_flow) {
2556 *may_set_up_flow = ctx.may_set_up_flow;
2558 if (nf_output_iface) {
2559 *nf_output_iface = ctx.nf_output_iface;
2561 if (odp_actions_overflow(out)) {
2562 odp_actions_init(out);
2563 return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_TOO_MANY);
2568 /* Checks whether 'ofconn' is a slave controller. If so, returns an OpenFlow
2569 * error message code (composed with ofp_mkerr()) for the caller to propagate
2570 * upward. Otherwise, returns 0.
2572 * 'oh' is used to make log messages more informative. */
2574 reject_slave_controller(struct ofconn *ofconn, const struct ofp_header *oh)
2576 if (ofconn->type == OFCONN_CONTROLLER && ofconn->role == NX_ROLE_SLAVE) {
2577 static struct vlog_rate_limit perm_rl = VLOG_RATE_LIMIT_INIT(1, 5);
2580 type_name = ofp_message_type_to_string(oh->type);
2581 VLOG_WARN_RL(&perm_rl, "rejecting %s message from slave controller",
2585 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
2592 handle_packet_out(struct ofproto *p, struct ofconn *ofconn,
2593 struct ofp_header *oh)
2595 struct ofp_packet_out *opo;
2596 struct ofpbuf payload, *buffer;
2597 struct odp_actions actions;
2603 error = reject_slave_controller(ofconn, oh);
2608 error = check_ofp_packet_out(oh, &payload, &n_actions, p->max_ports);
2612 opo = (struct ofp_packet_out *) oh;
2614 COVERAGE_INC(ofproto_packet_out);
2615 if (opo->buffer_id != htonl(UINT32_MAX)) {
2616 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(opo->buffer_id),
2618 if (error || !buffer) {
2626 flow_extract(&payload, 0, ofp_port_to_odp_port(ntohs(opo->in_port)), &flow);
2627 error = xlate_actions((const union ofp_action *) opo->actions, n_actions,
2628 &flow, p, &payload, &actions, NULL, NULL, NULL);
2633 dpif_execute(p->dpif, flow.in_port, actions.actions, actions.n_actions,
2635 ofpbuf_delete(buffer);
2641 update_port_config(struct ofproto *p, struct ofport *port,
2642 uint32_t config, uint32_t mask)
2644 mask &= config ^ port->opp.config;
2645 if (mask & OFPPC_PORT_DOWN) {
2646 if (config & OFPPC_PORT_DOWN) {
2647 netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
2649 netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
2652 #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | OFPPC_NO_FWD)
2653 if (mask & REVALIDATE_BITS) {
2654 COVERAGE_INC(ofproto_costly_flags);
2655 port->opp.config ^= mask & REVALIDATE_BITS;
2656 p->need_revalidate = true;
2658 #undef REVALIDATE_BITS
2659 if (mask & OFPPC_NO_FLOOD) {
2660 port->opp.config ^= OFPPC_NO_FLOOD;
2661 refresh_port_groups(p);
2663 if (mask & OFPPC_NO_PACKET_IN) {
2664 port->opp.config ^= OFPPC_NO_PACKET_IN;
2669 handle_port_mod(struct ofproto *p, struct ofconn *ofconn,
2670 struct ofp_header *oh)
2672 const struct ofp_port_mod *opm;
2673 struct ofport *port;
2676 error = reject_slave_controller(ofconn, oh);
2680 error = check_ofp_message(oh, OFPT_PORT_MOD, sizeof *opm);
2684 opm = (struct ofp_port_mod *) oh;
2686 port = port_array_get(&p->ports,
2687 ofp_port_to_odp_port(ntohs(opm->port_no)));
2689 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
2690 } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
2691 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR);
2693 update_port_config(p, port, ntohl(opm->config), ntohl(opm->mask));
2694 if (opm->advertise) {
2695 netdev_set_advertisements(port->netdev, ntohl(opm->advertise));
2701 static struct ofpbuf *
2702 make_stats_reply(uint32_t xid, uint16_t type, size_t body_len)
2704 struct ofp_stats_reply *osr;
2707 msg = ofpbuf_new(MIN(sizeof *osr + body_len, UINT16_MAX));
2708 osr = put_openflow_xid(sizeof *osr, OFPT_STATS_REPLY, xid, msg);
2710 osr->flags = htons(0);
2714 static struct ofpbuf *
2715 start_stats_reply(const struct ofp_stats_request *request, size_t body_len)
2717 return make_stats_reply(request->header.xid, request->type, body_len);
2721 append_stats_reply(size_t nbytes, struct ofconn *ofconn, struct ofpbuf **msgp)
2723 struct ofpbuf *msg = *msgp;
2724 assert(nbytes <= UINT16_MAX - sizeof(struct ofp_stats_reply));
2725 if (nbytes + msg->size > UINT16_MAX) {
2726 struct ofp_stats_reply *reply = msg->data;
2727 reply->flags = htons(OFPSF_REPLY_MORE);
2728 *msgp = make_stats_reply(reply->header.xid, reply->type, nbytes);
2729 queue_tx(msg, ofconn, ofconn->reply_counter);
2731 return ofpbuf_put_uninit(*msgp, nbytes);
2735 handle_desc_stats_request(struct ofproto *p, struct ofconn *ofconn,
2736 struct ofp_stats_request *request)
2738 struct ofp_desc_stats *ods;
2741 msg = start_stats_reply(request, sizeof *ods);
2742 ods = append_stats_reply(sizeof *ods, ofconn, &msg);
2743 memset(ods, 0, sizeof *ods);
2744 ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
2745 ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
2746 ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
2747 ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
2748 ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
2749 queue_tx(msg, ofconn, ofconn->reply_counter);
2755 count_subrules(struct cls_rule *cls_rule, void *n_subrules_)
2757 struct rule *rule = rule_from_cls_rule(cls_rule);
2758 int *n_subrules = n_subrules_;
2766 handle_table_stats_request(struct ofproto *p, struct ofconn *ofconn,
2767 struct ofp_stats_request *request)
2769 struct ofp_table_stats *ots;
2771 struct odp_stats dpstats;
2772 int n_exact, n_subrules, n_wild;
2774 msg = start_stats_reply(request, sizeof *ots * 2);
2776 /* Count rules of various kinds. */
2778 classifier_for_each(&p->cls, CLS_INC_EXACT, count_subrules, &n_subrules);
2779 n_exact = classifier_count_exact(&p->cls) - n_subrules;
2780 n_wild = classifier_count(&p->cls) - classifier_count_exact(&p->cls);
2783 dpif_get_dp_stats(p->dpif, &dpstats);
2784 ots = append_stats_reply(sizeof *ots, ofconn, &msg);
2785 memset(ots, 0, sizeof *ots);
2786 ots->table_id = TABLEID_HASH;
2787 strcpy(ots->name, "hash");
2788 ots->wildcards = htonl(0);
2789 ots->max_entries = htonl(dpstats.max_capacity);
2790 ots->active_count = htonl(n_exact);
2791 ots->lookup_count = htonll(dpstats.n_frags + dpstats.n_hit +
2793 ots->matched_count = htonll(dpstats.n_hit); /* XXX */
2795 /* Classifier table. */
2796 ots = append_stats_reply(sizeof *ots, ofconn, &msg);
2797 memset(ots, 0, sizeof *ots);
2798 ots->table_id = TABLEID_CLASSIFIER;
2799 strcpy(ots->name, "classifier");
2800 ots->wildcards = p->tun_id_from_cookie ? htonl(OVSFW_ALL)
2802 ots->max_entries = htonl(65536);
2803 ots->active_count = htonl(n_wild);
2804 ots->lookup_count = htonll(0); /* XXX */
2805 ots->matched_count = htonll(0); /* XXX */
2807 queue_tx(msg, ofconn, ofconn->reply_counter);
2812 append_port_stat(struct ofport *port, uint16_t port_no, struct ofconn *ofconn,
2813 struct ofpbuf **msgp)
2815 struct netdev_stats stats;
2816 struct ofp_port_stats *ops;
2818 /* Intentionally ignore return value, since errors will set
2819 * 'stats' to all-1s, which is correct for OpenFlow, and
2820 * netdev_get_stats() will log errors. */
2821 netdev_get_stats(port->netdev, &stats);
2823 ops = append_stats_reply(sizeof *ops, ofconn, msgp);
2824 ops->port_no = htons(odp_port_to_ofp_port(port_no));
2825 memset(ops->pad, 0, sizeof ops->pad);
2826 ops->rx_packets = htonll(stats.rx_packets);
2827 ops->tx_packets = htonll(stats.tx_packets);
2828 ops->rx_bytes = htonll(stats.rx_bytes);
2829 ops->tx_bytes = htonll(stats.tx_bytes);
2830 ops->rx_dropped = htonll(stats.rx_dropped);
2831 ops->tx_dropped = htonll(stats.tx_dropped);
2832 ops->rx_errors = htonll(stats.rx_errors);
2833 ops->tx_errors = htonll(stats.tx_errors);
2834 ops->rx_frame_err = htonll(stats.rx_frame_errors);
2835 ops->rx_over_err = htonll(stats.rx_over_errors);
2836 ops->rx_crc_err = htonll(stats.rx_crc_errors);
2837 ops->collisions = htonll(stats.collisions);
2841 handle_port_stats_request(struct ofproto *p, struct ofconn *ofconn,
2842 struct ofp_stats_request *osr,
2845 struct ofp_port_stats_request *psr;
2846 struct ofp_port_stats *ops;
2848 struct ofport *port;
2849 unsigned int port_no;
2851 if (arg_size != sizeof *psr) {
2852 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
2854 psr = (struct ofp_port_stats_request *) osr->body;
2856 msg = start_stats_reply(osr, sizeof *ops * 16);
2857 if (psr->port_no != htons(OFPP_NONE)) {
2858 port = port_array_get(&p->ports,
2859 ofp_port_to_odp_port(ntohs(psr->port_no)));
2861 append_port_stat(port, ntohs(psr->port_no), ofconn, &msg);
2864 PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
2865 append_port_stat(port, port_no, ofconn, &msg);
2869 queue_tx(msg, ofconn, ofconn->reply_counter);
2873 struct flow_stats_cbdata {
2874 struct ofproto *ofproto;
2875 struct ofconn *ofconn;
2880 /* Obtains statistic counters for 'rule' within 'p' and stores them into
2881 * '*packet_countp' and '*byte_countp'. If 'rule' is a wildcarded rule, the
2882 * returned statistic include statistics for all of 'rule''s subrules. */
2884 query_stats(struct ofproto *p, struct rule *rule,
2885 uint64_t *packet_countp, uint64_t *byte_countp)
2887 uint64_t packet_count, byte_count;
2888 struct rule *subrule;
2889 struct odp_flow *odp_flows;
2892 /* Start from historical data for 'rule' itself that are no longer tracked
2893 * by the datapath. This counts, for example, subrules that have
2895 packet_count = rule->packet_count;
2896 byte_count = rule->byte_count;
2898 /* Prepare to ask the datapath for statistics on 'rule', or if it is
2899 * wildcarded then on all of its subrules.
2901 * Also, add any statistics that are not tracked by the datapath for each
2902 * subrule. This includes, for example, statistics for packets that were
2903 * executed "by hand" by ofproto via dpif_execute() but must be accounted
2905 n_odp_flows = rule->cr.wc.wildcards ? list_size(&rule->list) : 1;
2906 odp_flows = xzalloc(n_odp_flows * sizeof *odp_flows);
2907 if (rule->cr.wc.wildcards) {
2909 LIST_FOR_EACH (subrule, struct rule, list, &rule->list) {
2910 odp_flows[i++].key = subrule->cr.flow;
2911 packet_count += subrule->packet_count;
2912 byte_count += subrule->byte_count;
2915 odp_flows[0].key = rule->cr.flow;
2918 /* Fetch up-to-date statistics from the datapath and add them in. */
2919 if (!dpif_flow_get_multiple(p->dpif, odp_flows, n_odp_flows)) {
2921 for (i = 0; i < n_odp_flows; i++) {
2922 struct odp_flow *odp_flow = &odp_flows[i];
2923 packet_count += odp_flow->stats.n_packets;
2924 byte_count += odp_flow->stats.n_bytes;
2929 /* Return the stats to the caller. */
2930 *packet_countp = packet_count;
2931 *byte_countp = byte_count;
2935 flow_stats_cb(struct cls_rule *rule_, void *cbdata_)
2937 struct rule *rule = rule_from_cls_rule(rule_);
2938 struct flow_stats_cbdata *cbdata = cbdata_;
2939 struct ofp_flow_stats *ofs;
2940 uint64_t packet_count, byte_count;
2941 size_t act_len, len;
2942 long long int tdiff = time_msec() - rule->created;
2943 uint32_t sec = tdiff / 1000;
2944 uint32_t msec = tdiff - (sec * 1000);
2946 if (rule_is_hidden(rule) || !rule_has_out_port(rule, cbdata->out_port)) {
2950 act_len = sizeof *rule->actions * rule->n_actions;
2951 len = offsetof(struct ofp_flow_stats, actions) + act_len;
2953 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
2955 ofs = append_stats_reply(len, cbdata->ofconn, &cbdata->msg);
2956 ofs->length = htons(len);
2957 ofs->table_id = rule->cr.wc.wildcards ? TABLEID_CLASSIFIER : TABLEID_HASH;
2959 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards,
2960 cbdata->ofproto->tun_id_from_cookie, &ofs->match);
2961 ofs->duration_sec = htonl(sec);
2962 ofs->duration_nsec = htonl(msec * 1000000);
2963 ofs->cookie = rule->flow_cookie;
2964 ofs->priority = htons(rule->cr.priority);
2965 ofs->idle_timeout = htons(rule->idle_timeout);
2966 ofs->hard_timeout = htons(rule->hard_timeout);
2967 memset(ofs->pad2, 0, sizeof ofs->pad2);
2968 ofs->packet_count = htonll(packet_count);
2969 ofs->byte_count = htonll(byte_count);
2970 memcpy(ofs->actions, rule->actions, act_len);
2974 table_id_to_include(uint8_t table_id)
2976 return (table_id == TABLEID_HASH ? CLS_INC_EXACT
2977 : table_id == TABLEID_CLASSIFIER ? CLS_INC_WILD
2978 : table_id == 0xff ? CLS_INC_ALL
2983 handle_flow_stats_request(struct ofproto *p, struct ofconn *ofconn,
2984 const struct ofp_stats_request *osr,
2987 struct ofp_flow_stats_request *fsr;
2988 struct flow_stats_cbdata cbdata;
2989 struct cls_rule target;
2991 if (arg_size != sizeof *fsr) {
2992 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
2994 fsr = (struct ofp_flow_stats_request *) osr->body;
2996 COVERAGE_INC(ofproto_flows_req);
2998 cbdata.ofconn = ofconn;
2999 cbdata.out_port = fsr->out_port;
3000 cbdata.msg = start_stats_reply(osr, 1024);
3001 cls_rule_from_match(&fsr->match, 0, false, 0, &target);
3002 classifier_for_each_match(&p->cls, &target,
3003 table_id_to_include(fsr->table_id),
3004 flow_stats_cb, &cbdata);
3005 queue_tx(cbdata.msg, ofconn, ofconn->reply_counter);
3009 struct flow_stats_ds_cbdata {
3010 struct ofproto *ofproto;
3015 flow_stats_ds_cb(struct cls_rule *rule_, void *cbdata_)
3017 struct rule *rule = rule_from_cls_rule(rule_);
3018 struct flow_stats_ds_cbdata *cbdata = cbdata_;
3019 struct ds *results = cbdata->results;
3020 struct ofp_match match;
3021 uint64_t packet_count, byte_count;
3022 size_t act_len = sizeof *rule->actions * rule->n_actions;
3024 /* Don't report on subrules. */
3025 if (rule->super != NULL) {
3029 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
3030 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards,
3031 cbdata->ofproto->tun_id_from_cookie, &match);
3033 ds_put_format(results, "duration=%llds, ",
3034 (time_msec() - rule->created) / 1000);
3035 ds_put_format(results, "priority=%u, ", rule->cr.priority);
3036 ds_put_format(results, "n_packets=%"PRIu64", ", packet_count);
3037 ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
3038 ofp_print_match(results, &match, true);
3039 ofp_print_actions(results, &rule->actions->header, act_len);
3040 ds_put_cstr(results, "\n");
3043 /* Adds a pretty-printed description of all flows to 'results', including
3044 * those marked hidden by secchan (e.g., by in-band control). */
3046 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
3048 struct ofp_match match;
3049 struct cls_rule target;
3050 struct flow_stats_ds_cbdata cbdata;
3052 memset(&match, 0, sizeof match);
3053 match.wildcards = htonl(OVSFW_ALL);
3056 cbdata.results = results;
3058 cls_rule_from_match(&match, 0, false, 0, &target);
3059 classifier_for_each_match(&p->cls, &target, CLS_INC_ALL,
3060 flow_stats_ds_cb, &cbdata);
3063 struct aggregate_stats_cbdata {
3064 struct ofproto *ofproto;
3066 uint64_t packet_count;
3067 uint64_t byte_count;
3072 aggregate_stats_cb(struct cls_rule *rule_, void *cbdata_)
3074 struct rule *rule = rule_from_cls_rule(rule_);
3075 struct aggregate_stats_cbdata *cbdata = cbdata_;
3076 uint64_t packet_count, byte_count;
3078 if (rule_is_hidden(rule) || !rule_has_out_port(rule, cbdata->out_port)) {
3082 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
3084 cbdata->packet_count += packet_count;
3085 cbdata->byte_count += byte_count;
3090 handle_aggregate_stats_request(struct ofproto *p, struct ofconn *ofconn,
3091 const struct ofp_stats_request *osr,
3094 struct ofp_aggregate_stats_request *asr;
3095 struct ofp_aggregate_stats_reply *reply;
3096 struct aggregate_stats_cbdata cbdata;
3097 struct cls_rule target;
3100 if (arg_size != sizeof *asr) {
3101 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3103 asr = (struct ofp_aggregate_stats_request *) osr->body;
3105 COVERAGE_INC(ofproto_agg_request);
3107 cbdata.out_port = asr->out_port;
3108 cbdata.packet_count = 0;
3109 cbdata.byte_count = 0;
3111 cls_rule_from_match(&asr->match, 0, false, 0, &target);
3112 classifier_for_each_match(&p->cls, &target,
3113 table_id_to_include(asr->table_id),
3114 aggregate_stats_cb, &cbdata);
3116 msg = start_stats_reply(osr, sizeof *reply);
3117 reply = append_stats_reply(sizeof *reply, ofconn, &msg);
3118 reply->flow_count = htonl(cbdata.n_flows);
3119 reply->packet_count = htonll(cbdata.packet_count);
3120 reply->byte_count = htonll(cbdata.byte_count);
3121 queue_tx(msg, ofconn, ofconn->reply_counter);
3126 handle_stats_request(struct ofproto *p, struct ofconn *ofconn,
3127 struct ofp_header *oh)
3129 struct ofp_stats_request *osr;
3133 error = check_ofp_message_array(oh, OFPT_STATS_REQUEST, sizeof *osr,
3138 osr = (struct ofp_stats_request *) oh;
3140 switch (ntohs(osr->type)) {
3142 return handle_desc_stats_request(p, ofconn, osr);
3145 return handle_flow_stats_request(p, ofconn, osr, arg_size);
3147 case OFPST_AGGREGATE:
3148 return handle_aggregate_stats_request(p, ofconn, osr, arg_size);
3151 return handle_table_stats_request(p, ofconn, osr);
3154 return handle_port_stats_request(p, ofconn, osr, arg_size);
3157 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
3160 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT);
3164 static long long int
3165 msec_from_nsec(uint64_t sec, uint32_t nsec)
3167 return !sec ? 0 : sec * 1000 + nsec / 1000000;
3171 update_time(struct ofproto *ofproto, struct rule *rule,
3172 const struct odp_flow_stats *stats)
3174 long long int used = msec_from_nsec(stats->used_sec, stats->used_nsec);
3175 if (used > rule->used) {
3177 if (rule->super && used > rule->super->used) {
3178 rule->super->used = used;
3180 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, used);
3185 update_stats(struct ofproto *ofproto, struct rule *rule,
3186 const struct odp_flow_stats *stats)
3188 if (stats->n_packets) {
3189 update_time(ofproto, rule, stats);
3190 rule->packet_count += stats->n_packets;
3191 rule->byte_count += stats->n_bytes;
3192 netflow_flow_update_flags(&rule->nf_flow, stats->ip_tos,
3197 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
3198 * in which no matching flow already exists in the flow table.
3200 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
3201 * ofp_actions, to 'p''s flow table. Returns 0 on success or an OpenFlow error
3202 * code as encoded by ofp_mkerr() on failure.
3204 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3207 add_flow(struct ofproto *p, struct ofconn *ofconn,
3208 const struct ofp_flow_mod *ofm, size_t n_actions)
3210 struct ofpbuf *packet;
3215 if (ofm->flags & htons(OFPFF_CHECK_OVERLAP)) {
3219 flow_from_match(&ofm->match, p->tun_id_from_cookie, ofm->cookie,
3221 if (classifier_rule_overlaps(&p->cls, &flow, wildcards,
3222 ntohs(ofm->priority))) {
3223 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP);
3227 rule = rule_create(p, NULL, (const union ofp_action *) ofm->actions,
3228 n_actions, ntohs(ofm->idle_timeout),
3229 ntohs(ofm->hard_timeout), ofm->cookie,
3230 ofm->flags & htons(OFPFF_SEND_FLOW_REM));
3231 cls_rule_from_match(&ofm->match, ntohs(ofm->priority),
3232 p->tun_id_from_cookie, ofm->cookie, &rule->cr);
3235 if (ofm->buffer_id != htonl(UINT32_MAX)) {
3236 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(ofm->buffer_id),
3240 in_port = UINT16_MAX;
3243 rule_insert(p, rule, packet, in_port);
3244 ofpbuf_delete(packet);
3248 static struct rule *
3249 find_flow_strict(struct ofproto *p, const struct ofp_flow_mod *ofm)
3254 flow_from_match(&ofm->match, p->tun_id_from_cookie, ofm->cookie,
3256 return rule_from_cls_rule(classifier_find_rule_exactly(
3257 &p->cls, &flow, wildcards,
3258 ntohs(ofm->priority)));
3262 send_buffered_packet(struct ofproto *ofproto, struct ofconn *ofconn,
3263 struct rule *rule, const struct ofp_flow_mod *ofm)
3265 struct ofpbuf *packet;
3270 if (ofm->buffer_id == htonl(UINT32_MAX)) {
3274 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(ofm->buffer_id),
3280 flow_extract(packet, 0, in_port, &flow);
3281 rule_execute(ofproto, rule, packet, &flow);
3282 ofpbuf_delete(packet);
3287 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
3289 struct modify_flows_cbdata {
3290 struct ofproto *ofproto;
3291 const struct ofp_flow_mod *ofm;
3296 static int modify_flow(struct ofproto *, const struct ofp_flow_mod *,
3297 size_t n_actions, struct rule *);
3298 static void modify_flows_cb(struct cls_rule *, void *cbdata_);
3300 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
3301 * encoded by ofp_mkerr() on failure.
3303 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3306 modify_flows_loose(struct ofproto *p, struct ofconn *ofconn,
3307 const struct ofp_flow_mod *ofm, size_t n_actions)
3309 struct modify_flows_cbdata cbdata;
3310 struct cls_rule target;
3314 cbdata.n_actions = n_actions;
3315 cbdata.match = NULL;
3317 cls_rule_from_match(&ofm->match, 0, p->tun_id_from_cookie, ofm->cookie,
3320 classifier_for_each_match(&p->cls, &target, CLS_INC_ALL,
3321 modify_flows_cb, &cbdata);
3323 /* This credits the packet to whichever flow happened to happened to
3324 * match last. That's weird. Maybe we should do a lookup for the
3325 * flow that actually matches the packet? Who knows. */
3326 send_buffered_packet(p, ofconn, cbdata.match, ofm);
3329 return add_flow(p, ofconn, ofm, n_actions);
3333 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
3334 * code as encoded by ofp_mkerr() on failure.
3336 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3339 modify_flow_strict(struct ofproto *p, struct ofconn *ofconn,
3340 struct ofp_flow_mod *ofm, size_t n_actions)
3342 struct rule *rule = find_flow_strict(p, ofm);
3343 if (rule && !rule_is_hidden(rule)) {
3344 modify_flow(p, ofm, n_actions, rule);
3345 return send_buffered_packet(p, ofconn, rule, ofm);
3347 return add_flow(p, ofconn, ofm, n_actions);
3351 /* Callback for modify_flows_loose(). */
3353 modify_flows_cb(struct cls_rule *rule_, void *cbdata_)
3355 struct rule *rule = rule_from_cls_rule(rule_);
3356 struct modify_flows_cbdata *cbdata = cbdata_;
3358 if (!rule_is_hidden(rule)) {
3359 cbdata->match = rule;
3360 modify_flow(cbdata->ofproto, cbdata->ofm, cbdata->n_actions, rule);
3364 /* Implements core of OFPFC_MODIFY and OFPFC_MODIFY_STRICT where 'rule' has
3365 * been identified as a flow in 'p''s flow table to be modified, by changing
3366 * the rule's actions to match those in 'ofm' (which is followed by 'n_actions'
3367 * ofp_action[] structures). */
3369 modify_flow(struct ofproto *p, const struct ofp_flow_mod *ofm,
3370 size_t n_actions, struct rule *rule)
3372 size_t actions_len = n_actions * sizeof *rule->actions;
3374 rule->flow_cookie = ofm->cookie;
3376 /* If the actions are the same, do nothing. */
3377 if (n_actions == rule->n_actions
3378 && !memcmp(ofm->actions, rule->actions, actions_len))
3383 /* Replace actions. */
3384 free(rule->actions);
3385 rule->actions = xmemdup(ofm->actions, actions_len);
3386 rule->n_actions = n_actions;
3388 /* Make sure that the datapath gets updated properly. */
3389 if (rule->cr.wc.wildcards) {
3390 COVERAGE_INC(ofproto_mod_wc_flow);
3391 p->need_revalidate = true;
3393 rule_update_actions(p, rule);
3399 /* OFPFC_DELETE implementation. */
3401 struct delete_flows_cbdata {
3402 struct ofproto *ofproto;
3406 static void delete_flows_cb(struct cls_rule *, void *cbdata_);
3407 static void delete_flow(struct ofproto *, struct rule *, uint16_t out_port);
3409 /* Implements OFPFC_DELETE. */
3411 delete_flows_loose(struct ofproto *p, const struct ofp_flow_mod *ofm)
3413 struct delete_flows_cbdata cbdata;
3414 struct cls_rule target;
3417 cbdata.out_port = ofm->out_port;
3419 cls_rule_from_match(&ofm->match, 0, p->tun_id_from_cookie, ofm->cookie,
3422 classifier_for_each_match(&p->cls, &target, CLS_INC_ALL,
3423 delete_flows_cb, &cbdata);
3426 /* Implements OFPFC_DELETE_STRICT. */
3428 delete_flow_strict(struct ofproto *p, struct ofp_flow_mod *ofm)
3430 struct rule *rule = find_flow_strict(p, ofm);
3432 delete_flow(p, rule, ofm->out_port);
3436 /* Callback for delete_flows_loose(). */
3438 delete_flows_cb(struct cls_rule *rule_, void *cbdata_)
3440 struct rule *rule = rule_from_cls_rule(rule_);
3441 struct delete_flows_cbdata *cbdata = cbdata_;
3443 delete_flow(cbdata->ofproto, rule, cbdata->out_port);
3446 /* Implements core of OFPFC_DELETE and OFPFC_DELETE_STRICT where 'rule' has
3447 * been identified as a flow to delete from 'p''s flow table, by deleting the
3448 * flow and sending out a OFPT_FLOW_REMOVED message to any interested
3451 * Will not delete 'rule' if it is hidden. Will delete 'rule' only if
3452 * 'out_port' is htons(OFPP_NONE) or if 'rule' actually outputs to the
3453 * specified 'out_port'. */
3455 delete_flow(struct ofproto *p, struct rule *rule, uint16_t out_port)
3457 if (rule_is_hidden(rule)) {
3461 if (out_port != htons(OFPP_NONE) && !rule_has_out_port(rule, out_port)) {
3465 send_flow_removed(p, rule, time_msec(), OFPRR_DELETE);
3466 rule_remove(p, rule);
3470 handle_flow_mod(struct ofproto *p, struct ofconn *ofconn,
3471 struct ofp_flow_mod *ofm)
3476 error = reject_slave_controller(ofconn, &ofm->header);
3480 error = check_ofp_message_array(&ofm->header, OFPT_FLOW_MOD, sizeof *ofm,
3481 sizeof *ofm->actions, &n_actions);
3486 /* We do not support the emergency flow cache. It will hopefully
3487 * get dropped from OpenFlow in the near future. */
3488 if (ofm->flags & htons(OFPFF_EMERG)) {
3489 /* There isn't a good fit for an error code, so just state that the
3490 * flow table is full. */
3491 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
3494 normalize_match(&ofm->match);
3495 if (!ofm->match.wildcards) {
3496 ofm->priority = htons(UINT16_MAX);
3499 error = validate_actions((const union ofp_action *) ofm->actions,
3500 n_actions, p->max_ports);
3505 switch (ntohs(ofm->command)) {
3507 return add_flow(p, ofconn, ofm, n_actions);
3510 return modify_flows_loose(p, ofconn, ofm, n_actions);
3512 case OFPFC_MODIFY_STRICT:
3513 return modify_flow_strict(p, ofconn, ofm, n_actions);
3516 delete_flows_loose(p, ofm);
3519 case OFPFC_DELETE_STRICT:
3520 delete_flow_strict(p, ofm);
3524 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND);
3529 handle_tun_id_from_cookie(struct ofproto *p, struct nxt_tun_id_cookie *msg)
3533 error = check_ofp_message(&msg->header, OFPT_VENDOR, sizeof *msg);
3538 p->tun_id_from_cookie = !!msg->set;
3543 handle_role_request(struct ofproto *ofproto,
3544 struct ofconn *ofconn, struct nicira_header *msg)
3546 struct nx_role_request *nrr;
3547 struct nx_role_request *reply;
3551 if (ntohs(msg->header.length) != sizeof *nrr) {
3552 VLOG_WARN_RL(&rl, "received role request of length %u (expected %zu)",
3553 ntohs(msg->header.length), sizeof *nrr);
3554 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3556 nrr = (struct nx_role_request *) msg;
3558 if (ofconn->type != OFCONN_CONTROLLER) {
3559 VLOG_WARN_RL(&rl, "ignoring role request on non-controller "
3561 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
3564 role = ntohl(nrr->role);
3565 if (role != NX_ROLE_OTHER && role != NX_ROLE_MASTER
3566 && role != NX_ROLE_SLAVE) {
3567 VLOG_WARN_RL(&rl, "received request for unknown role %"PRIu32, role);
3569 /* There's no good error code for this. */
3570 return ofp_mkerr(OFPET_BAD_REQUEST, -1);
3573 if (role == NX_ROLE_MASTER) {
3574 struct ofconn *other;
3576 HMAP_FOR_EACH (other, struct ofconn, hmap_node,
3577 &ofproto->controllers) {
3578 if (other->role == NX_ROLE_MASTER) {
3579 other->role = NX_ROLE_SLAVE;
3583 ofconn->role = role;
3585 reply = make_openflow_xid(sizeof *reply, OFPT_VENDOR, msg->header.xid,
3587 reply->nxh.vendor = htonl(NX_VENDOR_ID);
3588 reply->nxh.subtype = htonl(NXT_ROLE_REPLY);
3589 reply->role = htonl(role);
3590 queue_tx(buf, ofconn, ofconn->reply_counter);
3596 handle_vendor(struct ofproto *p, struct ofconn *ofconn, void *msg)
3598 struct ofp_vendor_header *ovh = msg;
3599 struct nicira_header *nh;
3601 if (ntohs(ovh->header.length) < sizeof(struct ofp_vendor_header)) {
3602 VLOG_WARN_RL(&rl, "received vendor message of length %u "
3603 "(expected at least %zu)",
3604 ntohs(ovh->header.length), sizeof(struct ofp_vendor_header));
3605 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3607 if (ovh->vendor != htonl(NX_VENDOR_ID)) {
3608 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
3610 if (ntohs(ovh->header.length) < sizeof(struct nicira_header)) {
3611 VLOG_WARN_RL(&rl, "received Nicira vendor message of length %u "
3612 "(expected at least %zu)",
3613 ntohs(ovh->header.length), sizeof(struct nicira_header));
3614 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3618 switch (ntohl(nh->subtype)) {
3619 case NXT_STATUS_REQUEST:
3620 return switch_status_handle_request(p->switch_status, ofconn->rconn,
3623 case NXT_TUN_ID_FROM_COOKIE:
3624 return handle_tun_id_from_cookie(p, msg);
3626 case NXT_ROLE_REQUEST:
3627 return handle_role_request(p, ofconn, msg);
3630 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE);
3634 handle_barrier_request(struct ofconn *ofconn, struct ofp_header *oh)
3636 struct ofp_header *ob;
3639 /* Currently, everything executes synchronously, so we can just
3640 * immediately send the barrier reply. */
3641 ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
3642 queue_tx(buf, ofconn, ofconn->reply_counter);
3647 handle_openflow(struct ofconn *ofconn, struct ofproto *p,
3648 struct ofpbuf *ofp_msg)
3650 struct ofp_header *oh = ofp_msg->data;
3653 COVERAGE_INC(ofproto_recv_openflow);
3655 case OFPT_ECHO_REQUEST:
3656 error = handle_echo_request(ofconn, oh);
3659 case OFPT_ECHO_REPLY:
3663 case OFPT_FEATURES_REQUEST:
3664 error = handle_features_request(p, ofconn, oh);
3667 case OFPT_GET_CONFIG_REQUEST:
3668 error = handle_get_config_request(p, ofconn, oh);
3671 case OFPT_SET_CONFIG:
3672 error = handle_set_config(p, ofconn, ofp_msg->data);
3675 case OFPT_PACKET_OUT:
3676 error = handle_packet_out(p, ofconn, ofp_msg->data);
3680 error = handle_port_mod(p, ofconn, oh);
3684 error = handle_flow_mod(p, ofconn, ofp_msg->data);
3687 case OFPT_STATS_REQUEST:
3688 error = handle_stats_request(p, ofconn, oh);
3692 error = handle_vendor(p, ofconn, ofp_msg->data);
3695 case OFPT_BARRIER_REQUEST:
3696 error = handle_barrier_request(ofconn, oh);
3700 if (VLOG_IS_WARN_ENABLED()) {
3701 char *s = ofp_to_string(oh, ntohs(oh->length), 2);
3702 VLOG_DBG_RL(&rl, "OpenFlow message ignored: %s", s);
3705 error = ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
3710 send_error_oh(ofconn, ofp_msg->data, error);
3715 handle_odp_miss_msg(struct ofproto *p, struct ofpbuf *packet)
3717 struct odp_msg *msg = packet->data;
3719 struct ofpbuf payload;
3722 payload.data = msg + 1;
3723 payload.size = msg->length - sizeof *msg;
3724 flow_extract(&payload, msg->arg, msg->port, &flow);
3726 /* Check with in-band control to see if this packet should be sent
3727 * to the local port regardless of the flow table. */
3728 if (in_band_msg_in_hook(p->in_band, &flow, &payload)) {
3729 union odp_action action;
3731 memset(&action, 0, sizeof(action));
3732 action.output.type = ODPAT_OUTPUT;
3733 action.output.port = ODPP_LOCAL;
3734 dpif_execute(p->dpif, flow.in_port, &action, 1, &payload);
3737 rule = lookup_valid_rule(p, &flow);
3739 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
3740 struct ofport *port = port_array_get(&p->ports, msg->port);
3742 if (port->opp.config & OFPPC_NO_PACKET_IN) {
3743 COVERAGE_INC(ofproto_no_packet_in);
3744 /* XXX install 'drop' flow entry */
3745 ofpbuf_delete(packet);
3749 VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16, msg->port);
3752 COVERAGE_INC(ofproto_packet_in);
3753 send_packet_in(p, packet);
3757 if (rule->cr.wc.wildcards) {
3758 rule = rule_create_subrule(p, rule, &flow);
3759 rule_make_actions(p, rule, packet);
3761 if (!rule->may_install) {
3762 /* The rule is not installable, that is, we need to process every
3763 * packet, so process the current packet and set its actions into
3765 rule_make_actions(p, rule, packet);
3767 /* XXX revalidate rule if it needs it */
3771 rule_execute(p, rule, &payload, &flow);
3772 rule_reinstall(p, rule);
3774 if (rule->super && rule->super->cr.priority == FAIL_OPEN_PRIORITY) {
3776 * Extra-special case for fail-open mode.
3778 * We are in fail-open mode and the packet matched the fail-open rule,
3779 * but we are connected to a controller too. We should send the packet
3780 * up to the controller in the hope that it will try to set up a flow
3781 * and thereby allow us to exit fail-open.
3783 * See the top-level comment in fail-open.c for more information.
3785 send_packet_in(p, packet);
3787 ofpbuf_delete(packet);
3792 handle_odp_msg(struct ofproto *p, struct ofpbuf *packet)
3794 struct odp_msg *msg = packet->data;
3796 switch (msg->type) {
3797 case _ODPL_ACTION_NR:
3798 COVERAGE_INC(ofproto_ctlr_action);
3799 send_packet_in(p, packet);
3802 case _ODPL_SFLOW_NR:
3804 ofproto_sflow_received(p->sflow, msg);
3806 ofpbuf_delete(packet);
3810 handle_odp_miss_msg(p, packet);
3814 VLOG_WARN_RL(&rl, "received ODP message of unexpected type %"PRIu32,
3821 revalidate_cb(struct cls_rule *sub_, void *cbdata_)
3823 struct rule *sub = rule_from_cls_rule(sub_);
3824 struct revalidate_cbdata *cbdata = cbdata_;
3826 if (cbdata->revalidate_all
3827 || (cbdata->revalidate_subrules && sub->super)
3828 || (tag_set_intersects(&cbdata->revalidate_set, sub->tags))) {
3829 revalidate_rule(cbdata->ofproto, sub);
3834 revalidate_rule(struct ofproto *p, struct rule *rule)
3836 const flow_t *flow = &rule->cr.flow;
3838 COVERAGE_INC(ofproto_revalidate_rule);
3841 super = rule_from_cls_rule(classifier_lookup_wild(&p->cls, flow));
3843 rule_remove(p, rule);
3845 } else if (super != rule->super) {
3846 COVERAGE_INC(ofproto_revalidate_moved);
3847 list_remove(&rule->list);
3848 list_push_back(&super->list, &rule->list);
3849 rule->super = super;
3850 rule->hard_timeout = super->hard_timeout;
3851 rule->idle_timeout = super->idle_timeout;
3852 rule->created = super->created;
3857 rule_update_actions(p, rule);
3861 static struct ofpbuf *
3862 compose_flow_removed(struct ofproto *p, const struct rule *rule,
3863 long long int now, uint8_t reason)
3865 struct ofp_flow_removed *ofr;
3867 long long int tdiff = now - rule->created;
3868 uint32_t sec = tdiff / 1000;
3869 uint32_t msec = tdiff - (sec * 1000);
3871 ofr = make_openflow(sizeof *ofr, OFPT_FLOW_REMOVED, &buf);
3872 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards, p->tun_id_from_cookie,
3874 ofr->cookie = rule->flow_cookie;
3875 ofr->priority = htons(rule->cr.priority);
3876 ofr->reason = reason;
3877 ofr->duration_sec = htonl(sec);
3878 ofr->duration_nsec = htonl(msec * 1000000);
3879 ofr->idle_timeout = htons(rule->idle_timeout);
3880 ofr->packet_count = htonll(rule->packet_count);
3881 ofr->byte_count = htonll(rule->byte_count);
3887 uninstall_idle_flow(struct ofproto *ofproto, struct rule *rule)
3889 assert(rule->installed);
3890 assert(!rule->cr.wc.wildcards);
3893 rule_remove(ofproto, rule);
3895 rule_uninstall(ofproto, rule);
3900 send_flow_removed(struct ofproto *p, struct rule *rule,
3901 long long int now, uint8_t reason)
3903 struct ofconn *ofconn;
3904 struct ofconn *prev;
3905 struct ofpbuf *buf = NULL;
3907 /* We limit the maximum number of queued flow expirations it by accounting
3908 * them under the counter for replies. That works because preventing
3909 * OpenFlow requests from being processed also prevents new flows from
3910 * being added (and expiring). (It also prevents processing OpenFlow
3911 * requests that would not add new flows, so it is imperfect.) */
3914 LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
3915 if (rule->send_flow_removed && rconn_is_connected(ofconn->rconn)
3916 && ofconn_receives_async_msgs(ofconn)) {
3918 queue_tx(ofpbuf_clone(buf), prev, prev->reply_counter);
3920 buf = compose_flow_removed(p, rule, now, reason);
3926 queue_tx(buf, prev, prev->reply_counter);
3932 expire_rule(struct cls_rule *cls_rule, void *p_)
3934 struct ofproto *p = p_;
3935 struct rule *rule = rule_from_cls_rule(cls_rule);
3936 long long int hard_expire, idle_expire, expire, now;
3938 hard_expire = (rule->hard_timeout
3939 ? rule->created + rule->hard_timeout * 1000
3941 idle_expire = (rule->idle_timeout
3942 && (rule->super || list_is_empty(&rule->list))
3943 ? rule->used + rule->idle_timeout * 1000
3945 expire = MIN(hard_expire, idle_expire);
3949 if (rule->installed && now >= rule->used + 5000) {
3950 uninstall_idle_flow(p, rule);
3951 } else if (!rule->cr.wc.wildcards) {
3952 active_timeout(p, rule);
3958 COVERAGE_INC(ofproto_expired);
3960 /* Update stats. This code will be a no-op if the rule expired
3961 * due to an idle timeout. */
3962 if (rule->cr.wc.wildcards) {
3963 struct rule *subrule, *next;
3964 LIST_FOR_EACH_SAFE (subrule, next, struct rule, list, &rule->list) {
3965 rule_remove(p, subrule);
3968 rule_uninstall(p, rule);
3971 if (!rule_is_hidden(rule)) {
3972 send_flow_removed(p, rule, now,
3974 ? OFPRR_HARD_TIMEOUT : OFPRR_IDLE_TIMEOUT));
3976 rule_remove(p, rule);
3980 active_timeout(struct ofproto *ofproto, struct rule *rule)
3982 if (ofproto->netflow && !is_controller_rule(rule) &&
3983 netflow_active_timeout_expired(ofproto->netflow, &rule->nf_flow)) {
3984 struct ofexpired expired;
3985 struct odp_flow odp_flow;
3987 /* Get updated flow stats. */
3988 memset(&odp_flow, 0, sizeof odp_flow);
3989 if (rule->installed) {
3990 odp_flow.key = rule->cr.flow;
3991 odp_flow.flags = ODPFF_ZERO_TCP_FLAGS;
3992 dpif_flow_get(ofproto->dpif, &odp_flow);
3994 if (odp_flow.stats.n_packets) {
3995 update_time(ofproto, rule, &odp_flow.stats);
3996 netflow_flow_update_flags(&rule->nf_flow, odp_flow.stats.ip_tos,
3997 odp_flow.stats.tcp_flags);
4001 expired.flow = rule->cr.flow;
4002 expired.packet_count = rule->packet_count +
4003 odp_flow.stats.n_packets;
4004 expired.byte_count = rule->byte_count + odp_flow.stats.n_bytes;
4005 expired.used = rule->used;
4007 netflow_expire(ofproto->netflow, &rule->nf_flow, &expired);
4009 /* Schedule us to send the accumulated records once we have
4010 * collected all of them. */
4011 poll_immediate_wake();
4016 update_used(struct ofproto *p)
4018 struct odp_flow *flows;
4023 error = dpif_flow_list_all(p->dpif, &flows, &n_flows);
4028 for (i = 0; i < n_flows; i++) {
4029 struct odp_flow *f = &flows[i];
4032 rule = rule_from_cls_rule(
4033 classifier_find_rule_exactly(&p->cls, &f->key, 0, UINT16_MAX));
4034 if (!rule || !rule->installed) {
4035 COVERAGE_INC(ofproto_unexpected_rule);
4036 dpif_flow_del(p->dpif, f);
4040 update_time(p, rule, &f->stats);
4041 rule_account(p, rule, f->stats.n_bytes);
4046 /* pinsched callback for sending 'packet' on 'ofconn'. */
4048 do_send_packet_in(struct ofpbuf *packet, void *ofconn_)
4050 struct ofconn *ofconn = ofconn_;
4052 rconn_send_with_limit(ofconn->rconn, packet,
4053 ofconn->packet_in_counter, 100);
4056 /* Takes 'packet', which has been converted with do_convert_to_packet_in(), and
4057 * finalizes its content for sending on 'ofconn', and passes it to 'ofconn''s
4058 * packet scheduler for sending.
4060 * 'max_len' specifies the maximum number of bytes of the packet to send on
4061 * 'ofconn' (INT_MAX specifies no limit).
4063 * If 'clone' is true, the caller retains ownership of 'packet'. Otherwise,
4064 * ownership is transferred to this function. */
4066 schedule_packet_in(struct ofconn *ofconn, struct ofpbuf *packet, int max_len,
4069 struct ofproto *ofproto = ofconn->ofproto;
4070 struct ofp_packet_in *opi = packet->data;
4071 uint16_t in_port = ofp_port_to_odp_port(ntohs(opi->in_port));
4072 int send_len, trim_size;
4076 if (opi->reason == OFPR_ACTION) {
4077 buffer_id = UINT32_MAX;
4078 } else if (ofproto->fail_open && fail_open_is_active(ofproto->fail_open)) {
4079 buffer_id = pktbuf_get_null();
4080 } else if (!ofconn->pktbuf) {
4081 buffer_id = UINT32_MAX;
4083 struct ofpbuf payload;
4084 payload.data = opi->data;
4085 payload.size = packet->size - offsetof(struct ofp_packet_in, data);
4086 buffer_id = pktbuf_save(ofconn->pktbuf, &payload, in_port);
4089 /* Figure out how much of the packet to send. */
4090 send_len = ntohs(opi->total_len);
4091 if (buffer_id != UINT32_MAX) {
4092 send_len = MIN(send_len, ofconn->miss_send_len);
4094 send_len = MIN(send_len, max_len);
4096 /* Adjust packet length and clone if necessary. */
4097 trim_size = offsetof(struct ofp_packet_in, data) + send_len;
4099 packet = ofpbuf_clone_data(packet->data, trim_size);
4102 packet->size = trim_size;
4105 /* Update packet headers. */
4106 opi->buffer_id = htonl(buffer_id);
4107 update_openflow_length(packet);
4109 /* Hand over to packet scheduler. It might immediately call into
4110 * do_send_packet_in() or it might buffer it for a while (until a later
4111 * call to pinsched_run()). */
4112 pinsched_send(ofconn->schedulers[opi->reason], in_port,
4113 packet, do_send_packet_in, ofconn);
4116 /* Replace struct odp_msg header in 'packet' by equivalent struct
4117 * ofp_packet_in. The odp_msg must have sufficient headroom to do so (e.g. as
4118 * returned by dpif_recv()).
4120 * The conversion is not complete: the caller still needs to trim any unneeded
4121 * payload off the end of the buffer, set the length in the OpenFlow header,
4122 * and set buffer_id. Those require us to know the controller settings and so
4123 * must be done on a per-controller basis.
4125 * Returns the maximum number of bytes of the packet that should be sent to
4126 * the controller (INT_MAX if no limit). */
4128 do_convert_to_packet_in(struct ofpbuf *packet)
4130 struct odp_msg *msg = packet->data;
4131 struct ofp_packet_in *opi;
4137 /* Extract relevant header fields */
4138 if (msg->type == _ODPL_ACTION_NR) {
4139 reason = OFPR_ACTION;
4142 reason = OFPR_NO_MATCH;
4145 total_len = msg->length - sizeof *msg;
4146 in_port = odp_port_to_ofp_port(msg->port);
4148 /* Repurpose packet buffer by overwriting header. */
4149 ofpbuf_pull(packet, sizeof(struct odp_msg));
4150 opi = ofpbuf_push_zeros(packet, offsetof(struct ofp_packet_in, data));
4151 opi->header.version = OFP_VERSION;
4152 opi->header.type = OFPT_PACKET_IN;
4153 opi->total_len = htons(total_len);
4154 opi->in_port = htons(in_port);
4155 opi->reason = reason;
4160 /* Given 'packet' containing an odp_msg of type _ODPL_ACTION_NR or
4161 * _ODPL_MISS_NR, sends an OFPT_PACKET_IN message to each OpenFlow controller
4162 * as necessary according to their individual configurations.
4164 * 'packet' must have sufficient headroom to convert it into a struct
4165 * ofp_packet_in (e.g. as returned by dpif_recv()).
4167 * Takes ownership of 'packet'. */
4169 send_packet_in(struct ofproto *ofproto, struct ofpbuf *packet)
4171 struct ofconn *ofconn, *prev;
4174 max_len = do_convert_to_packet_in(packet);
4177 LIST_FOR_EACH (ofconn, struct ofconn, node, &ofproto->all_conns) {
4178 if (ofconn_receives_async_msgs(ofconn)) {
4180 schedule_packet_in(prev, packet, max_len, true);
4186 schedule_packet_in(prev, packet, max_len, false);
4188 ofpbuf_delete(packet);
4193 pick_datapath_id(const struct ofproto *ofproto)
4195 const struct ofport *port;
4197 port = port_array_get(&ofproto->ports, ODPP_LOCAL);
4199 uint8_t ea[ETH_ADDR_LEN];
4202 error = netdev_get_etheraddr(port->netdev, ea);
4204 return eth_addr_to_uint64(ea);
4206 VLOG_WARN("could not get MAC address for %s (%s)",
4207 netdev_get_name(port->netdev), strerror(error));
4209 return ofproto->fallback_dpid;
4213 pick_fallback_dpid(void)
4215 uint8_t ea[ETH_ADDR_LEN];
4216 eth_addr_nicira_random(ea);
4217 return eth_addr_to_uint64(ea);
4221 default_normal_ofhook_cb(const flow_t *flow, const struct ofpbuf *packet,
4222 struct odp_actions *actions, tag_type *tags,
4223 uint16_t *nf_output_iface, void *ofproto_)
4225 struct ofproto *ofproto = ofproto_;
4228 /* Drop frames for reserved multicast addresses. */
4229 if (eth_addr_is_reserved(flow->dl_dst)) {
4233 /* Learn source MAC (but don't try to learn from revalidation). */
4234 if (packet != NULL) {
4235 tag_type rev_tag = mac_learning_learn(ofproto->ml, flow->dl_src,
4237 GRAT_ARP_LOCK_NONE);
4239 /* The log messages here could actually be useful in debugging,
4240 * so keep the rate limit relatively high. */
4241 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
4242 VLOG_DBG_RL(&rl, "learned that "ETH_ADDR_FMT" is on port %"PRIu16,
4243 ETH_ADDR_ARGS(flow->dl_src), flow->in_port);
4244 ofproto_revalidate(ofproto, rev_tag);
4248 /* Determine output port. */
4249 out_port = mac_learning_lookup_tag(ofproto->ml, flow->dl_dst, 0, tags,
4252 add_output_group_action(actions, DP_GROUP_FLOOD, nf_output_iface);
4253 } else if (out_port != flow->in_port) {
4254 odp_actions_add(actions, ODPAT_OUTPUT)->output.port = out_port;
4255 *nf_output_iface = out_port;
4263 static const struct ofhooks default_ofhooks = {
4265 default_normal_ofhook_cb,