2 * Copyright (c) 2009, 2010, 2011 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include "ofproto/private.h"
25 #include "byte-order.h"
30 #include "dynamic-string.h"
31 #include "fail-open.h"
34 #include "mac-learning.h"
35 #include "multipath.h"
42 #include "ofp-print.h"
43 #include "ofproto-sflow.h"
44 #include "poll-loop.h"
46 #include "unaligned.h"
48 #include "vlan-bitmap.h"
51 VLOG_DEFINE_THIS_MODULE(ofproto_dpif);
53 COVERAGE_DEFINE(ofproto_dpif_ctlr_action);
54 COVERAGE_DEFINE(ofproto_dpif_expired);
55 COVERAGE_DEFINE(ofproto_dpif_no_packet_in);
56 COVERAGE_DEFINE(ofproto_dpif_xlate);
57 COVERAGE_DEFINE(facet_changed_rule);
58 COVERAGE_DEFINE(facet_invalidated);
59 COVERAGE_DEFINE(facet_revalidate);
60 COVERAGE_DEFINE(facet_unexpected);
62 /* Maximum depth of flow table recursion (due to NXAST_RESUBMIT actions) in a
63 * flow translation. */
64 #define MAX_RESUBMIT_RECURSION 16
72 long long int used; /* Time last used; time created if not used. */
76 * - Do include packets and bytes from facets that have been deleted or
77 * whose own statistics have been folded into the rule.
79 * - Do include packets and bytes sent "by hand" that were accounted to
80 * the rule without any facet being involved (this is a rare corner
81 * case in rule_execute()).
83 * - Do not include packet or bytes that can be obtained from any facet's
84 * packet_count or byte_count member or that can be obtained from the
85 * datapath by, e.g., dpif_flow_get() for any facet.
87 uint64_t packet_count; /* Number of packets received. */
88 uint64_t byte_count; /* Number of bytes received. */
90 struct list facets; /* List of "struct facet"s. */
93 static struct rule_dpif *rule_dpif_cast(const struct rule *rule)
95 return rule ? CONTAINER_OF(rule, struct rule_dpif, up) : NULL;
98 static struct rule_dpif *rule_dpif_lookup(struct ofproto_dpif *ofproto,
99 const struct flow *flow);
101 #define MAX_MIRRORS 32
102 typedef uint32_t mirror_mask_t;
103 #define MIRROR_MASK_C(X) UINT32_C(X)
104 BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS);
106 struct ofproto_dpif *ofproto; /* Owning ofproto. */
107 size_t idx; /* In ofproto's "mirrors" array. */
108 void *aux; /* Key supplied by ofproto's client. */
109 char *name; /* Identifier for log messages. */
111 /* Selection criteria. */
112 struct hmapx srcs; /* Contains "struct ofbundle *"s. */
113 struct hmapx dsts; /* Contains "struct ofbundle *"s. */
114 unsigned long *vlans; /* Bitmap of chosen VLANs, NULL selects all. */
116 /* Output (mutually exclusive). */
117 struct ofbundle *out; /* Output port or NULL. */
118 int out_vlan; /* Output VLAN or -1. */
121 static void mirror_destroy(struct ofmirror *);
123 /* A group of one or more OpenFlow ports. */
124 #define OFBUNDLE_FLOOD ((struct ofbundle *) 1)
126 struct ofproto_dpif *ofproto; /* Owning ofproto. */
127 struct hmap_node hmap_node; /* In struct ofproto's "bundles" hmap. */
128 void *aux; /* Key supplied by ofproto's client. */
129 char *name; /* Identifier for log messages. */
132 struct list ports; /* Contains "struct ofport"s. */
133 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
134 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
135 * NULL if all VLANs are trunked. */
136 struct lacp *lacp; /* LACP if LACP is enabled, otherwise NULL. */
137 struct bond *bond; /* Nonnull iff more than one port. */
140 bool floodable; /* True if no port has OFPPC_NO_FLOOD set. */
142 /* Port mirroring info. */
143 mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */
144 mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */
145 mirror_mask_t mirror_out; /* Mirrors that output to this bundle. */
148 static void bundle_remove(struct ofport *);
149 static void bundle_destroy(struct ofbundle *);
150 static void bundle_del_port(struct ofport_dpif *);
151 static void bundle_run(struct ofbundle *);
152 static void bundle_wait(struct ofbundle *);
154 struct action_xlate_ctx {
155 /* action_xlate_ctx_init() initializes these members. */
158 struct ofproto_dpif *ofproto;
160 /* Flow to which the OpenFlow actions apply. xlate_actions() will modify
161 * this flow when actions change header fields. */
164 /* The packet corresponding to 'flow', or a null pointer if we are
165 * revalidating without a packet to refer to. */
166 const struct ofpbuf *packet;
168 /* If nonnull, called just before executing a resubmit action.
170 * This is normally null so the client has to set it manually after
171 * calling action_xlate_ctx_init(). */
172 void (*resubmit_hook)(struct action_xlate_ctx *, struct rule_dpif *);
174 /* If true, the speciality of 'flow' should be checked before executing
175 * its actions. If special_cb returns false on 'flow' rendered
176 * uninstallable and no actions will be executed. */
179 /* xlate_actions() initializes and uses these members. The client might want
180 * to look at them after it returns. */
182 struct ofpbuf *odp_actions; /* Datapath actions. */
183 tag_type tags; /* Tags associated with OFPP_NORMAL actions. */
184 bool may_set_up_flow; /* True ordinarily; false if the actions must
185 * be reassessed for every packet. */
186 uint16_t nf_output_iface; /* Output interface index for NetFlow. */
188 /* xlate_actions() initializes and uses these members, but the client has no
189 * reason to look at them. */
191 int recurse; /* Recursion level, via xlate_table_action. */
192 int last_pop_priority; /* Offset in 'odp_actions' just past most
193 * recent ODP_ACTION_ATTR_SET_PRIORITY. */
196 static void action_xlate_ctx_init(struct action_xlate_ctx *,
197 struct ofproto_dpif *, const struct flow *,
198 const struct ofpbuf *);
199 static struct ofpbuf *xlate_actions(struct action_xlate_ctx *,
200 const union ofp_action *in, size_t n_in);
202 /* An exact-match instantiation of an OpenFlow flow. */
204 long long int used; /* Time last used; time created if not used. */
208 * - Do include packets and bytes sent "by hand", e.g. with
211 * - Do include packets and bytes that were obtained from the datapath
212 * when a flow was deleted (e.g. dpif_flow_del()) or when its
213 * statistics were reset (e.g. dpif_flow_put() with
214 * DPIF_FP_ZERO_STATS).
216 * - Do not include any packets or bytes that can currently be obtained
217 * from the datapath by, e.g., dpif_flow_get().
219 uint64_t packet_count; /* Number of packets received. */
220 uint64_t byte_count; /* Number of bytes received. */
222 uint64_t dp_packet_count; /* Last known packet count in the datapath. */
223 uint64_t dp_byte_count; /* Last known byte count in the datapath. */
225 uint64_t rs_packet_count; /* Packets pushed to resubmit children. */
226 uint64_t rs_byte_count; /* Bytes pushed to resubmit children. */
227 long long int rs_used; /* Used time pushed to resubmit children. */
229 /* Number of bytes passed to account_cb. This may include bytes that can
230 * currently obtained from the datapath (thus, it can be greater than
232 uint64_t accounted_bytes;
234 struct hmap_node hmap_node; /* In owning ofproto's 'facets' hmap. */
235 struct list list_node; /* In owning rule's 'facets' list. */
236 struct rule_dpif *rule; /* Owning rule. */
237 struct flow flow; /* Exact-match flow. */
238 bool installed; /* Installed in datapath? */
239 bool may_install; /* True ordinarily; false if actions must
240 * be reassessed for every packet. */
241 size_t actions_len; /* Number of bytes in actions[]. */
242 struct nlattr *actions; /* Datapath actions. */
243 tag_type tags; /* Tags. */
244 struct netflow_flow nf_flow; /* Per-flow NetFlow tracking data. */
247 static struct facet *facet_create(struct rule_dpif *, const struct flow *,
248 const struct ofpbuf *packet);
249 static void facet_remove(struct ofproto_dpif *, struct facet *);
250 static void facet_free(struct facet *);
252 static struct facet *facet_find(struct ofproto_dpif *, const struct flow *);
253 static struct facet *facet_lookup_valid(struct ofproto_dpif *,
254 const struct flow *);
255 static bool facet_revalidate(struct ofproto_dpif *, struct facet *);
257 static void facet_execute(struct ofproto_dpif *, struct facet *,
258 struct ofpbuf *packet);
260 static int facet_put__(struct ofproto_dpif *, struct facet *,
261 const struct nlattr *actions, size_t actions_len,
262 struct dpif_flow_stats *);
263 static void facet_install(struct ofproto_dpif *, struct facet *,
265 static void facet_uninstall(struct ofproto_dpif *, struct facet *);
266 static void facet_flush_stats(struct ofproto_dpif *, struct facet *);
268 static void facet_make_actions(struct ofproto_dpif *, struct facet *,
269 const struct ofpbuf *packet);
270 static void facet_update_time(struct ofproto_dpif *, struct facet *,
272 static void facet_update_stats(struct ofproto_dpif *, struct facet *,
273 const struct dpif_flow_stats *);
274 static void facet_push_stats(struct facet *);
275 static void facet_account(struct ofproto_dpif *, struct facet *,
276 uint64_t extra_bytes);
278 static bool facet_is_controller_flow(struct facet *);
280 static void flow_push_stats(const struct rule_dpif *,
281 struct flow *, uint64_t packets, uint64_t bytes,
288 struct ofbundle *bundle; /* Bundle that contains this port, if any. */
289 struct list bundle_node; /* In struct ofbundle's "ports" list. */
290 struct cfm *cfm; /* Connectivity Fault Management, if any. */
291 tag_type tag; /* Tag associated with this port. */
294 static struct ofport_dpif *
295 ofport_dpif_cast(const struct ofport *ofport)
297 assert(ofport->ofproto->ofproto_class == &ofproto_dpif_class);
298 return ofport ? CONTAINER_OF(ofport, struct ofport_dpif, up) : NULL;
301 static void port_run(struct ofport_dpif *);
302 static void port_wait(struct ofport_dpif *);
303 static int set_cfm(struct ofport *, const struct cfm *,
304 const uint16_t *remote_mps, size_t n_remote_mps);
306 struct ofproto_dpif {
315 struct netflow *netflow;
316 struct ofproto_sflow *sflow;
317 struct hmap bundles; /* Contains "struct ofbundle"s. */
318 struct mac_learning *ml;
319 struct ofmirror *mirrors[MAX_MIRRORS];
320 bool has_bonded_bundles;
323 struct timer next_expiration;
327 bool need_revalidate;
328 struct tag_set revalidate_set;
331 static void ofproto_dpif_unixctl_init(void);
333 static struct ofproto_dpif *
334 ofproto_dpif_cast(const struct ofproto *ofproto)
336 assert(ofproto->ofproto_class == &ofproto_dpif_class);
337 return CONTAINER_OF(ofproto, struct ofproto_dpif, up);
340 static struct ofport_dpif *get_ofp_port(struct ofproto_dpif *,
342 static struct ofport_dpif *get_odp_port(struct ofproto_dpif *,
345 /* Packet processing. */
346 static void update_learning_table(struct ofproto_dpif *,
347 const struct flow *, int vlan,
349 static bool is_admissible(struct ofproto_dpif *, const struct flow *,
350 bool have_packet, tag_type *, int *vlanp,
351 struct ofbundle **in_bundlep);
352 static void handle_upcall(struct ofproto_dpif *, struct dpif_upcall *);
354 /* Flow expiration. */
355 static int expire(struct ofproto_dpif *);
358 static int send_packet(struct ofproto_dpif *,
359 uint32_t odp_port, uint16_t vlan_tci,
360 const struct ofpbuf *packet);
362 /* Global variables. */
363 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
365 /* Factory functions. */
368 enumerate_types(struct sset *types)
370 dp_enumerate_types(types);
374 enumerate_names(const char *type, struct sset *names)
376 return dp_enumerate_names(type, names);
380 del(const char *type, const char *name)
385 error = dpif_open(name, type, &dpif);
387 error = dpif_delete(dpif);
393 /* Basic life-cycle. */
395 static struct ofproto *
398 struct ofproto_dpif *ofproto = xmalloc(sizeof *ofproto);
403 dealloc(struct ofproto *ofproto_)
405 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
410 construct(struct ofproto *ofproto_)
412 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
413 const char *name = ofproto->up.name;
417 error = dpif_create_and_open(name, ofproto->up.type, &ofproto->dpif);
419 VLOG_ERR("failed to open datapath %s: %s", name, strerror(error));
423 ofproto->max_ports = dpif_get_max_ports(ofproto->dpif);
424 ofproto->n_matches = 0;
426 error = dpif_recv_set_mask(ofproto->dpif,
427 ((1u << DPIF_UC_MISS) |
428 (1u << DPIF_UC_ACTION) |
429 (1u << DPIF_UC_SAMPLE)));
431 VLOG_ERR("failed to listen on datapath %s: %s", name, strerror(error));
432 dpif_close(ofproto->dpif);
435 dpif_flow_flush(ofproto->dpif);
436 dpif_recv_purge(ofproto->dpif);
438 ofproto->netflow = NULL;
439 ofproto->sflow = NULL;
440 hmap_init(&ofproto->bundles);
441 ofproto->ml = mac_learning_create();
442 for (i = 0; i < MAX_MIRRORS; i++) {
443 ofproto->mirrors[i] = NULL;
445 ofproto->has_bonded_bundles = false;
447 timer_set_duration(&ofproto->next_expiration, 1000);
449 hmap_init(&ofproto->facets);
450 ofproto->need_revalidate = false;
451 tag_set_init(&ofproto->revalidate_set);
453 ofproto->up.tables = xmalloc(sizeof *ofproto->up.tables);
454 classifier_init(&ofproto->up.tables[0]);
455 ofproto->up.n_tables = 1;
457 ofproto_dpif_unixctl_init();
463 destruct(struct ofproto *ofproto_)
465 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
468 for (i = 0; i < MAX_MIRRORS; i++) {
469 mirror_destroy(ofproto->mirrors[i]);
472 netflow_destroy(ofproto->netflow);
473 ofproto_sflow_destroy(ofproto->sflow);
474 hmap_destroy(&ofproto->bundles);
475 mac_learning_destroy(ofproto->ml);
477 hmap_destroy(&ofproto->facets);
479 dpif_close(ofproto->dpif);
483 run(struct ofproto *ofproto_)
485 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
486 struct ofport_dpif *ofport;
487 struct ofbundle *bundle;
490 dpif_run(ofproto->dpif);
492 for (i = 0; i < 50; i++) {
493 struct dpif_upcall packet;
496 error = dpif_recv(ofproto->dpif, &packet);
498 if (error == ENODEV) {
499 /* Datapath destroyed. */
505 handle_upcall(ofproto, &packet);
508 if (timer_expired(&ofproto->next_expiration)) {
509 int delay = expire(ofproto);
510 timer_set_duration(&ofproto->next_expiration, delay);
513 if (ofproto->netflow) {
514 netflow_run(ofproto->netflow);
516 if (ofproto->sflow) {
517 ofproto_sflow_run(ofproto->sflow);
520 HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
523 HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
527 /* Now revalidate if there's anything to do. */
528 if (ofproto->need_revalidate
529 || !tag_set_is_empty(&ofproto->revalidate_set)) {
530 struct tag_set revalidate_set = ofproto->revalidate_set;
531 bool revalidate_all = ofproto->need_revalidate;
532 struct facet *facet, *next;
534 /* Clear the revalidation flags. */
535 tag_set_init(&ofproto->revalidate_set);
536 ofproto->need_revalidate = false;
538 HMAP_FOR_EACH_SAFE (facet, next, hmap_node, &ofproto->facets) {
540 || tag_set_intersects(&revalidate_set, facet->tags)) {
541 facet_revalidate(ofproto, facet);
550 wait(struct ofproto *ofproto_)
552 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
553 struct ofport_dpif *ofport;
554 struct ofbundle *bundle;
556 dpif_wait(ofproto->dpif);
557 dpif_recv_wait(ofproto->dpif);
558 if (ofproto->sflow) {
559 ofproto_sflow_wait(ofproto->sflow);
561 if (!tag_set_is_empty(&ofproto->revalidate_set)) {
562 poll_immediate_wake();
564 HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
567 HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
570 if (ofproto->need_revalidate) {
571 /* Shouldn't happen, but if it does just go around again. */
572 VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
573 poll_immediate_wake();
575 timer_wait(&ofproto->next_expiration);
580 flush(struct ofproto *ofproto_)
582 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
583 struct facet *facet, *next_facet;
585 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
586 /* Mark the facet as not installed so that facet_remove() doesn't
587 * bother trying to uninstall it. There is no point in uninstalling it
588 * individually since we are about to blow away all the facets with
589 * dpif_flow_flush(). */
590 facet->installed = false;
591 facet->dp_packet_count = 0;
592 facet->dp_byte_count = 0;
593 facet_remove(ofproto, facet);
595 dpif_flow_flush(ofproto->dpif);
599 get_features(struct ofproto *ofproto_ OVS_UNUSED,
600 bool *arp_match_ip, uint32_t *actions)
602 *arp_match_ip = true;
603 *actions = ((1u << OFPAT_OUTPUT) |
604 (1u << OFPAT_SET_VLAN_VID) |
605 (1u << OFPAT_SET_VLAN_PCP) |
606 (1u << OFPAT_STRIP_VLAN) |
607 (1u << OFPAT_SET_DL_SRC) |
608 (1u << OFPAT_SET_DL_DST) |
609 (1u << OFPAT_SET_NW_SRC) |
610 (1u << OFPAT_SET_NW_DST) |
611 (1u << OFPAT_SET_NW_TOS) |
612 (1u << OFPAT_SET_TP_SRC) |
613 (1u << OFPAT_SET_TP_DST) |
614 (1u << OFPAT_ENQUEUE));
618 get_tables(struct ofproto *ofproto_, struct ofp_table_stats *ots)
620 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
623 strcpy(ots->name, "classifier");
625 dpif_get_dp_stats(ofproto->dpif, &s);
626 put_32aligned_be64(&ots->lookup_count, htonll(s.n_hit + s.n_missed));
627 put_32aligned_be64(&ots->matched_count,
628 htonll(s.n_hit + ofproto->n_matches));
632 set_netflow(struct ofproto *ofproto_,
633 const struct netflow_options *netflow_options)
635 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
637 if (netflow_options) {
638 if (!ofproto->netflow) {
639 ofproto->netflow = netflow_create();
641 return netflow_set_options(ofproto->netflow, netflow_options);
643 netflow_destroy(ofproto->netflow);
644 ofproto->netflow = NULL;
649 static struct ofport *
652 struct ofport_dpif *port = xmalloc(sizeof *port);
657 port_dealloc(struct ofport *port_)
659 struct ofport_dpif *port = ofport_dpif_cast(port_);
664 port_construct(struct ofport *port_)
666 struct ofport_dpif *port = ofport_dpif_cast(port_);
667 struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
669 port->odp_port = ofp_port_to_odp_port(port->up.ofp_port);
672 port->tag = tag_create_random();
674 if (ofproto->sflow) {
675 ofproto_sflow_add_port(ofproto->sflow, port->odp_port,
676 netdev_get_name(port->up.netdev));
683 port_destruct(struct ofport *port_)
685 struct ofport_dpif *port = ofport_dpif_cast(port_);
686 struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
688 bundle_remove(port_);
689 set_cfm(port_, NULL, NULL, 0);
690 if (ofproto->sflow) {
691 ofproto_sflow_del_port(ofproto->sflow, port->odp_port);
696 port_modified(struct ofport *port_)
698 struct ofport_dpif *port = ofport_dpif_cast(port_);
700 if (port->bundle && port->bundle->bond) {
701 bond_slave_set_netdev(port->bundle->bond, port, port->up.netdev);
706 port_reconfigured(struct ofport *port_, ovs_be32 old_config)
708 struct ofport_dpif *port = ofport_dpif_cast(port_);
709 struct ofproto_dpif *ofproto = ofproto_dpif_cast(port->up.ofproto);
710 ovs_be32 changed = old_config ^ port->up.opp.config;
712 if (changed & htonl(OFPPC_NO_RECV | OFPPC_NO_RECV_STP |
713 OFPPC_NO_FWD | OFPPC_NO_FLOOD)) {
714 ofproto->need_revalidate = true;
719 set_sflow(struct ofproto *ofproto_,
720 const struct ofproto_sflow_options *sflow_options)
722 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
723 struct ofproto_sflow *os = ofproto->sflow;
726 struct ofport_dpif *ofport;
728 os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
729 HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
730 ofproto_sflow_add_port(os, ofport->odp_port,
731 netdev_get_name(ofport->up.netdev));
734 ofproto_sflow_set_options(os, sflow_options);
736 ofproto_sflow_destroy(os);
737 ofproto->sflow = NULL;
743 set_cfm(struct ofport *ofport_, const struct cfm *cfm,
744 const uint16_t *remote_mps, size_t n_remote_mps)
746 struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
753 ofport->cfm = cfm_create();
756 ofport->cfm->mpid = cfm->mpid;
757 ofport->cfm->interval = cfm->interval;
758 memcpy(ofport->cfm->maid, cfm->maid, CCM_MAID_LEN);
760 cfm_update_remote_mps(ofport->cfm, remote_mps, n_remote_mps);
762 if (cfm_configure(ofport->cfm)) {
768 cfm_destroy(ofport->cfm);
774 get_cfm(struct ofport *ofport_, const struct cfm **cfmp)
776 struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
783 /* Expires all MAC learning entries associated with 'port' and forces ofproto
784 * to revalidate every flow. */
786 bundle_flush_macs(struct ofbundle *bundle)
788 struct ofproto_dpif *ofproto = bundle->ofproto;
789 struct mac_learning *ml = ofproto->ml;
790 struct mac_entry *mac, *next_mac;
792 ofproto->need_revalidate = true;
793 LIST_FOR_EACH_SAFE (mac, next_mac, lru_node, &ml->lrus) {
794 if (mac->port.p == bundle) {
795 mac_learning_expire(ml, mac);
800 static struct ofbundle *
801 bundle_lookup(const struct ofproto_dpif *ofproto, void *aux)
803 struct ofbundle *bundle;
805 HMAP_FOR_EACH_IN_BUCKET (bundle, hmap_node, hash_pointer(aux, 0),
807 if (bundle->aux == aux) {
814 /* Looks up each of the 'n_auxes' pointers in 'auxes' as bundles and adds the
815 * ones that are found to 'bundles'. */
817 bundle_lookup_multiple(struct ofproto_dpif *ofproto,
818 void **auxes, size_t n_auxes,
819 struct hmapx *bundles)
824 for (i = 0; i < n_auxes; i++) {
825 struct ofbundle *bundle = bundle_lookup(ofproto, auxes[i]);
827 hmapx_add(bundles, bundle);
833 bundle_del_port(struct ofport_dpif *port)
835 struct ofbundle *bundle = port->bundle;
837 list_remove(&port->bundle_node);
841 lacp_slave_unregister(bundle->lacp, port);
844 bond_slave_unregister(bundle->bond, port);
847 bundle->floodable = true;
848 LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
849 if (port->up.opp.config & htonl(OFPPC_NO_FLOOD)) {
850 bundle->floodable = false;
856 bundle_add_port(struct ofbundle *bundle, uint32_t ofp_port,
857 struct lacp_slave_settings *lacp)
859 struct ofport_dpif *port;
861 port = get_ofp_port(bundle->ofproto, ofp_port);
866 if (port->bundle != bundle) {
868 bundle_del_port(port);
871 port->bundle = bundle;
872 list_push_back(&bundle->ports, &port->bundle_node);
873 if (port->up.opp.config & htonl(OFPPC_NO_FLOOD)) {
874 bundle->floodable = false;
878 lacp_slave_register(bundle->lacp, port, lacp);
885 bundle_destroy(struct ofbundle *bundle)
887 struct ofproto_dpif *ofproto;
888 struct ofport_dpif *port, *next_port;
895 ofproto = bundle->ofproto;
896 for (i = 0; i < MAX_MIRRORS; i++) {
897 struct ofmirror *m = ofproto->mirrors[i];
899 if (m->out == bundle) {
901 } else if (hmapx_find_and_delete(&m->srcs, bundle)
902 || hmapx_find_and_delete(&m->dsts, bundle)) {
903 ofproto->need_revalidate = true;
908 LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
909 bundle_del_port(port);
912 bundle_flush_macs(bundle);
913 hmap_remove(&ofproto->bundles, &bundle->hmap_node);
915 free(bundle->trunks);
916 lacp_destroy(bundle->lacp);
917 bond_destroy(bundle->bond);
922 bundle_set(struct ofproto *ofproto_, void *aux,
923 const struct ofproto_bundle_settings *s)
925 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
926 bool need_flush = false;
927 const unsigned long *trunks;
928 struct ofport_dpif *port;
929 struct ofbundle *bundle;
934 bundle_destroy(bundle_lookup(ofproto, aux));
938 assert(s->n_slaves == 1 || s->bond != NULL);
939 assert((s->lacp != NULL) == (s->lacp_slaves != NULL));
941 bundle = bundle_lookup(ofproto, aux);
943 bundle = xmalloc(sizeof *bundle);
945 bundle->ofproto = ofproto;
946 hmap_insert(&ofproto->bundles, &bundle->hmap_node,
947 hash_pointer(aux, 0));
951 list_init(&bundle->ports);
953 bundle->trunks = NULL;
957 bundle->floodable = true;
959 bundle->src_mirrors = 0;
960 bundle->dst_mirrors = 0;
961 bundle->mirror_out = 0;
964 if (!bundle->name || strcmp(s->name, bundle->name)) {
966 bundle->name = xstrdup(s->name);
972 bundle->lacp = lacp_create();
974 lacp_configure(bundle->lacp, s->lacp);
976 lacp_destroy(bundle->lacp);
980 /* Update set of ports. */
982 for (i = 0; i < s->n_slaves; i++) {
983 if (!bundle_add_port(bundle, s->slaves[i],
984 s->lacp ? &s->lacp_slaves[i] : NULL)) {
988 if (!ok || list_size(&bundle->ports) != s->n_slaves) {
989 struct ofport_dpif *next_port;
991 LIST_FOR_EACH_SAFE (port, next_port, bundle_node, &bundle->ports) {
992 for (i = 0; i < s->n_slaves; i++) {
993 if (s->slaves[i] == odp_port_to_ofp_port(port->odp_port)) {
998 bundle_del_port(port);
1002 assert(list_size(&bundle->ports) <= s->n_slaves);
1004 if (list_is_empty(&bundle->ports)) {
1005 bundle_destroy(bundle);
1010 if (s->vlan != bundle->vlan) {
1011 bundle->vlan = s->vlan;
1015 /* Get trunked VLANs. */
1016 trunks = s->vlan == -1 ? NULL : s->trunks;
1017 if (!vlan_bitmap_equal(trunks, bundle->trunks)) {
1018 free(bundle->trunks);
1019 bundle->trunks = vlan_bitmap_clone(trunks);
1024 if (!list_is_short(&bundle->ports)) {
1025 bundle->ofproto->has_bonded_bundles = true;
1027 if (bond_reconfigure(bundle->bond, s->bond)) {
1028 ofproto->need_revalidate = true;
1031 bundle->bond = bond_create(s->bond);
1034 LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
1035 uint16_t stable_id = (bundle->lacp
1036 ? lacp_slave_get_port_id(bundle->lacp, port)
1038 bond_slave_register(bundle->bond, port, stable_id,
1042 bond_destroy(bundle->bond);
1043 bundle->bond = NULL;
1046 /* If we changed something that would affect MAC learning, un-learn
1047 * everything on this port and force flow revalidation. */
1049 bundle_flush_macs(bundle);
1056 bundle_remove(struct ofport *port_)
1058 struct ofport_dpif *port = ofport_dpif_cast(port_);
1059 struct ofbundle *bundle = port->bundle;
1062 bundle_del_port(port);
1063 if (list_is_empty(&bundle->ports)) {
1064 bundle_destroy(bundle);
1065 } else if (list_is_short(&bundle->ports)) {
1066 bond_destroy(bundle->bond);
1067 bundle->bond = NULL;
1073 send_pdu_cb(void *port_, const struct lacp_pdu *pdu)
1075 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 10);
1076 struct ofport_dpif *port = port_;
1077 uint8_t ea[ETH_ADDR_LEN];
1080 error = netdev_get_etheraddr(port->up.netdev, ea);
1082 struct lacp_pdu *packet_pdu;
1083 struct ofpbuf packet;
1085 ofpbuf_init(&packet, 0);
1086 packet_pdu = eth_compose(&packet, eth_addr_lacp, ea, ETH_TYPE_LACP,
1087 sizeof *packet_pdu);
1089 error = netdev_send(port->up.netdev, &packet);
1091 VLOG_WARN_RL(&rl, "port %s: sending LACP PDU on iface %s failed "
1092 "(%s)", port->bundle->name,
1093 netdev_get_name(port->up.netdev), strerror(error));
1095 ofpbuf_uninit(&packet);
1097 VLOG_ERR_RL(&rl, "port %s: cannot obtain Ethernet address of iface "
1098 "%s (%s)", port->bundle->name,
1099 netdev_get_name(port->up.netdev), strerror(error));
1104 bundle_send_learning_packets(struct ofbundle *bundle)
1106 struct ofproto_dpif *ofproto = bundle->ofproto;
1107 int error, n_packets, n_errors;
1108 struct mac_entry *e;
1110 error = n_packets = n_errors = 0;
1111 LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
1112 if (e->port.p != bundle) {
1113 int ret = bond_send_learning_packet(bundle->bond, e->mac, e->vlan);
1123 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1124 VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning "
1125 "packets, last error was: %s",
1126 bundle->name, n_errors, n_packets, strerror(error));
1128 VLOG_DBG("bond %s: sent %d gratuitous learning packets",
1129 bundle->name, n_packets);
1134 bundle_run(struct ofbundle *bundle)
1137 lacp_run(bundle->lacp, send_pdu_cb);
1140 struct ofport_dpif *port;
1142 LIST_FOR_EACH (port, bundle_node, &bundle->ports) {
1143 bool may_enable = lacp_slave_may_enable(bundle->lacp, port);
1144 bond_slave_set_lacp_may_enable(bundle->bond, port, may_enable);
1147 bond_run(bundle->bond, &bundle->ofproto->revalidate_set,
1148 lacp_negotiated(bundle->lacp));
1149 if (bond_should_send_learning_packets(bundle->bond)) {
1150 bundle_send_learning_packets(bundle);
1156 bundle_wait(struct ofbundle *bundle)
1159 lacp_wait(bundle->lacp);
1162 bond_wait(bundle->bond);
1169 mirror_scan(struct ofproto_dpif *ofproto)
1173 for (idx = 0; idx < MAX_MIRRORS; idx++) {
1174 if (!ofproto->mirrors[idx]) {
1181 static struct ofmirror *
1182 mirror_lookup(struct ofproto_dpif *ofproto, void *aux)
1186 for (i = 0; i < MAX_MIRRORS; i++) {
1187 struct ofmirror *mirror = ofproto->mirrors[i];
1188 if (mirror && mirror->aux == aux) {
1197 mirror_set(struct ofproto *ofproto_, void *aux,
1198 const struct ofproto_mirror_settings *s)
1200 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1201 mirror_mask_t mirror_bit;
1202 struct ofbundle *bundle;
1203 struct ofmirror *mirror;
1204 struct ofbundle *out;
1205 struct hmapx srcs; /* Contains "struct ofbundle *"s. */
1206 struct hmapx dsts; /* Contains "struct ofbundle *"s. */
1209 mirror = mirror_lookup(ofproto, aux);
1211 mirror_destroy(mirror);
1217 idx = mirror_scan(ofproto);
1219 VLOG_WARN("bridge %s: maximum of %d port mirrors reached, "
1221 ofproto->up.name, MAX_MIRRORS, s->name);
1225 mirror = ofproto->mirrors[idx] = xzalloc(sizeof *mirror);
1226 mirror->ofproto = ofproto;
1228 mirror->out_vlan = -1;
1229 mirror->name = NULL;
1232 if (!mirror->name || strcmp(s->name, mirror->name)) {
1234 mirror->name = xstrdup(s->name);
1237 /* Get the new configuration. */
1238 if (s->out_bundle) {
1239 out = bundle_lookup(ofproto, s->out_bundle);
1241 mirror_destroy(mirror);
1247 out_vlan = s->out_vlan;
1249 bundle_lookup_multiple(ofproto, s->srcs, s->n_srcs, &srcs);
1250 bundle_lookup_multiple(ofproto, s->dsts, s->n_dsts, &dsts);
1252 /* If the configuration has not changed, do nothing. */
1253 if (hmapx_equals(&srcs, &mirror->srcs)
1254 && hmapx_equals(&dsts, &mirror->dsts)
1255 && vlan_bitmap_equal(mirror->vlans, s->src_vlans)
1256 && mirror->out == out
1257 && mirror->out_vlan == out_vlan)
1259 hmapx_destroy(&srcs);
1260 hmapx_destroy(&dsts);
1264 hmapx_swap(&srcs, &mirror->srcs);
1265 hmapx_destroy(&srcs);
1267 hmapx_swap(&dsts, &mirror->dsts);
1268 hmapx_destroy(&dsts);
1270 free(mirror->vlans);
1271 mirror->vlans = vlan_bitmap_clone(s->src_vlans);
1274 mirror->out_vlan = out_vlan;
1276 /* Update bundles. */
1277 mirror_bit = MIRROR_MASK_C(1) << mirror->idx;
1278 HMAP_FOR_EACH (bundle, hmap_node, &mirror->ofproto->bundles) {
1279 if (hmapx_contains(&mirror->srcs, bundle)) {
1280 bundle->src_mirrors |= mirror_bit;
1282 bundle->src_mirrors &= ~mirror_bit;
1285 if (hmapx_contains(&mirror->dsts, bundle)) {
1286 bundle->dst_mirrors |= mirror_bit;
1288 bundle->dst_mirrors &= ~mirror_bit;
1291 if (mirror->out == bundle) {
1292 bundle->mirror_out |= mirror_bit;
1294 bundle->mirror_out &= ~mirror_bit;
1298 ofproto->need_revalidate = true;
1299 mac_learning_flush(ofproto->ml);
1305 mirror_destroy(struct ofmirror *mirror)
1307 struct ofproto_dpif *ofproto;
1308 mirror_mask_t mirror_bit;
1309 struct ofbundle *bundle;
1315 ofproto = mirror->ofproto;
1316 ofproto->need_revalidate = true;
1317 mac_learning_flush(ofproto->ml);
1319 mirror_bit = MIRROR_MASK_C(1) << mirror->idx;
1320 HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1321 bundle->src_mirrors &= ~mirror_bit;
1322 bundle->dst_mirrors &= ~mirror_bit;
1323 bundle->mirror_out &= ~mirror_bit;
1326 hmapx_destroy(&mirror->srcs);
1327 hmapx_destroy(&mirror->dsts);
1328 free(mirror->vlans);
1330 ofproto->mirrors[mirror->idx] = NULL;
1336 set_flood_vlans(struct ofproto *ofproto_, unsigned long *flood_vlans)
1338 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1339 if (mac_learning_set_flood_vlans(ofproto->ml, flood_vlans)) {
1340 ofproto->need_revalidate = true;
1341 mac_learning_flush(ofproto->ml);
1347 is_mirror_output_bundle(struct ofproto *ofproto_, void *aux)
1349 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1350 struct ofbundle *bundle = bundle_lookup(ofproto, aux);
1351 return bundle && bundle->mirror_out != 0;
1356 static struct ofport_dpif *
1357 get_ofp_port(struct ofproto_dpif *ofproto, uint16_t ofp_port)
1359 return ofport_dpif_cast(ofproto_get_port(&ofproto->up, ofp_port));
1362 static struct ofport_dpif *
1363 get_odp_port(struct ofproto_dpif *ofproto, uint32_t odp_port)
1365 return get_ofp_port(ofproto, odp_port_to_ofp_port(odp_port));
1369 ofproto_port_from_dpif_port(struct ofproto_port *ofproto_port,
1370 struct dpif_port *dpif_port)
1372 ofproto_port->name = dpif_port->name;
1373 ofproto_port->type = dpif_port->type;
1374 ofproto_port->ofp_port = odp_port_to_ofp_port(dpif_port->port_no);
1378 port_run(struct ofport_dpif *ofport)
1381 cfm_run(ofport->cfm);
1383 if (cfm_should_send_ccm(ofport->cfm)) {
1384 struct ofpbuf packet;
1387 ofpbuf_init(&packet, 0);
1388 ccm = eth_compose(&packet, eth_addr_ccm, ofport->up.opp.hw_addr,
1389 ETH_TYPE_CFM, sizeof *ccm);
1390 cfm_compose_ccm(ofport->cfm, ccm);
1391 send_packet(ofproto_dpif_cast(ofport->up.ofproto),
1392 ofport->odp_port, 0, &packet);
1393 ofpbuf_uninit(&packet);
1399 port_wait(struct ofport_dpif *ofport)
1402 cfm_wait(ofport->cfm);
1407 port_query_by_name(const struct ofproto *ofproto_, const char *devname,
1408 struct ofproto_port *ofproto_port)
1410 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1411 struct dpif_port dpif_port;
1414 error = dpif_port_query_by_name(ofproto->dpif, devname, &dpif_port);
1416 ofproto_port_from_dpif_port(ofproto_port, &dpif_port);
1422 port_add(struct ofproto *ofproto_, struct netdev *netdev, uint16_t *ofp_portp)
1424 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1428 error = dpif_port_add(ofproto->dpif, netdev, &odp_port);
1430 *ofp_portp = odp_port_to_ofp_port(odp_port);
1436 port_del(struct ofproto *ofproto_, uint16_t ofp_port)
1438 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1441 error = dpif_port_del(ofproto->dpif, ofp_port_to_odp_port(ofp_port));
1443 struct ofport_dpif *ofport = get_ofp_port(ofproto, ofp_port);
1445 /* The caller is going to close ofport->up.netdev. If this is a
1446 * bonded port, then the bond is using that netdev, so remove it
1447 * from the bond. The client will need to reconfigure everything
1448 * after deleting ports, so then the slave will get re-added. */
1449 bundle_remove(&ofport->up);
1455 struct port_dump_state {
1456 struct dpif_port_dump dump;
1461 port_dump_start(const struct ofproto *ofproto_, void **statep)
1463 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1464 struct port_dump_state *state;
1466 *statep = state = xmalloc(sizeof *state);
1467 dpif_port_dump_start(&state->dump, ofproto->dpif);
1468 state->done = false;
1473 port_dump_next(const struct ofproto *ofproto_ OVS_UNUSED, void *state_,
1474 struct ofproto_port *port)
1476 struct port_dump_state *state = state_;
1477 struct dpif_port dpif_port;
1479 if (dpif_port_dump_next(&state->dump, &dpif_port)) {
1480 ofproto_port_from_dpif_port(port, &dpif_port);
1483 int error = dpif_port_dump_done(&state->dump);
1485 return error ? error : EOF;
1490 port_dump_done(const struct ofproto *ofproto_ OVS_UNUSED, void *state_)
1492 struct port_dump_state *state = state_;
1495 dpif_port_dump_done(&state->dump);
1502 port_poll(const struct ofproto *ofproto_, char **devnamep)
1504 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1505 return dpif_port_poll(ofproto->dpif, devnamep);
1509 port_poll_wait(const struct ofproto *ofproto_)
1511 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
1512 dpif_port_poll_wait(ofproto->dpif);
1516 port_is_lacp_current(const struct ofport *ofport_)
1518 const struct ofport_dpif *ofport = ofport_dpif_cast(ofport_);
1519 return (ofport->bundle && ofport->bundle->lacp
1520 ? lacp_slave_is_current(ofport->bundle->lacp, ofport)
1524 /* Upcall handling. */
1526 /* Given 'upcall', of type DPIF_UC_ACTION or DPIF_UC_MISS, sends an
1527 * OFPT_PACKET_IN message to each OpenFlow controller as necessary according to
1528 * their individual configurations.
1530 * If 'clone' is true, the caller retains ownership of 'upcall->packet'.
1531 * Otherwise, ownership is transferred to this function. */
1533 send_packet_in(struct ofproto_dpif *ofproto, struct dpif_upcall *upcall,
1534 const struct flow *flow, bool clone)
1536 struct ofputil_packet_in pin;
1538 pin.packet = upcall->packet;
1539 pin.in_port = flow->in_port;
1540 pin.reason = upcall->type == DPIF_UC_MISS ? OFPR_NO_MATCH : OFPR_ACTION;
1541 pin.buffer_id = 0; /* not yet known */
1542 pin.send_len = upcall->userdata;
1543 connmgr_send_packet_in(ofproto->up.connmgr, &pin, flow,
1544 clone ? NULL : upcall->packet);
1548 process_special(struct ofproto_dpif *ofproto, const struct flow *flow,
1549 const struct ofpbuf *packet)
1551 if (cfm_should_process_flow(flow)) {
1552 struct ofport_dpif *ofport = get_ofp_port(ofproto, flow->in_port);
1553 if (ofport && ofport->cfm) {
1554 cfm_process_heartbeat(ofport->cfm, packet);
1557 } else if (flow->dl_type == htons(ETH_TYPE_LACP)) {
1558 struct ofport_dpif *port = get_ofp_port(ofproto, flow->in_port);
1559 if (port && port->bundle && port->bundle->lacp) {
1560 const struct lacp_pdu *pdu = parse_lacp_packet(packet);
1562 lacp_process_pdu(port->bundle->lacp, port, pdu);
1571 handle_miss_upcall(struct ofproto_dpif *ofproto, struct dpif_upcall *upcall)
1573 struct facet *facet;
1576 /* Obtain in_port and tun_id, at least. */
1577 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
1579 /* Set header pointers in 'flow'. */
1580 flow_extract(upcall->packet, flow.tun_id, flow.in_port, &flow);
1582 /* Handle 802.1ag and LACP. */
1583 if (process_special(ofproto, &flow, upcall->packet)) {
1584 ofpbuf_delete(upcall->packet);
1585 ofproto->n_matches++;
1589 /* Check with in-band control to see if this packet should be sent
1590 * to the local port regardless of the flow table. */
1591 if (connmgr_msg_in_hook(ofproto->up.connmgr, &flow, upcall->packet)) {
1592 send_packet(ofproto, OFPP_LOCAL, 0, upcall->packet);
1595 facet = facet_lookup_valid(ofproto, &flow);
1597 struct rule_dpif *rule = rule_dpif_lookup(ofproto, &flow);
1599 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
1600 struct ofport_dpif *port = get_ofp_port(ofproto, flow.in_port);
1602 if (port->up.opp.config & htonl(OFPPC_NO_PACKET_IN)) {
1603 COVERAGE_INC(ofproto_dpif_no_packet_in);
1604 /* XXX install 'drop' flow entry */
1605 ofpbuf_delete(upcall->packet);
1609 VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16,
1613 send_packet_in(ofproto, upcall, &flow, false);
1617 facet = facet_create(rule, &flow, upcall->packet);
1618 } else if (!facet->may_install) {
1619 /* The facet is not installable, that is, we need to process every
1620 * packet, so process the current packet's actions into 'facet'. */
1621 facet_make_actions(ofproto, facet, upcall->packet);
1624 if (facet->rule->up.cr.priority == FAIL_OPEN_PRIORITY) {
1626 * Extra-special case for fail-open mode.
1628 * We are in fail-open mode and the packet matched the fail-open rule,
1629 * but we are connected to a controller too. We should send the packet
1630 * up to the controller in the hope that it will try to set up a flow
1631 * and thereby allow us to exit fail-open.
1633 * See the top-level comment in fail-open.c for more information.
1635 send_packet_in(ofproto, upcall, &flow, true);
1638 facet_execute(ofproto, facet, upcall->packet);
1639 facet_install(ofproto, facet, false);
1640 ofproto->n_matches++;
1644 handle_upcall(struct ofproto_dpif *ofproto, struct dpif_upcall *upcall)
1648 switch (upcall->type) {
1649 case DPIF_UC_ACTION:
1650 COVERAGE_INC(ofproto_dpif_ctlr_action);
1651 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
1652 send_packet_in(ofproto, upcall, &flow, false);
1655 case DPIF_UC_SAMPLE:
1656 if (ofproto->sflow) {
1657 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
1658 ofproto_sflow_received(ofproto->sflow, upcall, &flow);
1660 ofpbuf_delete(upcall->packet);
1664 handle_miss_upcall(ofproto, upcall);
1667 case DPIF_N_UC_TYPES:
1669 VLOG_WARN_RL(&rl, "upcall has unexpected type %"PRIu32, upcall->type);
1674 /* Flow expiration. */
1676 static int facet_max_idle(const struct ofproto_dpif *);
1677 static void update_stats(struct ofproto_dpif *);
1678 static void rule_expire(struct rule_dpif *);
1679 static void expire_facets(struct ofproto_dpif *, int dp_max_idle);
1681 /* This function is called periodically by run(). Its job is to collect
1682 * updates for the flows that have been installed into the datapath, most
1683 * importantly when they last were used, and then use that information to
1684 * expire flows that have not been used recently.
1686 * Returns the number of milliseconds after which it should be called again. */
1688 expire(struct ofproto_dpif *ofproto)
1690 struct rule_dpif *rule, *next_rule;
1691 struct cls_cursor cursor;
1694 /* Update stats for each flow in the datapath. */
1695 update_stats(ofproto);
1697 /* Expire facets that have been idle too long. */
1698 dp_max_idle = facet_max_idle(ofproto);
1699 expire_facets(ofproto, dp_max_idle);
1701 /* Expire OpenFlow flows whose idle_timeout or hard_timeout has passed. */
1702 cls_cursor_init(&cursor, &ofproto->up.tables[0], NULL);
1703 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, up.cr, &cursor) {
1707 /* All outstanding data in existing flows has been accounted, so it's a
1708 * good time to do bond rebalancing. */
1709 if (ofproto->has_bonded_bundles) {
1710 struct ofbundle *bundle;
1712 HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
1714 bond_rebalance(bundle->bond, &ofproto->revalidate_set);
1719 return MIN(dp_max_idle, 1000);
1722 /* Update 'packet_count', 'byte_count', and 'used' members of installed facets.
1724 * This function also pushes statistics updates to rules which each facet
1725 * resubmits into. Generally these statistics will be accurate. However, if a
1726 * facet changes the rule it resubmits into at some time in between
1727 * update_stats() runs, it is possible that statistics accrued to the
1728 * old rule will be incorrectly attributed to the new rule. This could be
1729 * avoided by calling update_stats() whenever rules are created or
1730 * deleted. However, the performance impact of making so many calls to the
1731 * datapath do not justify the benefit of having perfectly accurate statistics.
1734 update_stats(struct ofproto_dpif *p)
1736 const struct dpif_flow_stats *stats;
1737 struct dpif_flow_dump dump;
1738 const struct nlattr *key;
1741 dpif_flow_dump_start(&dump, p->dpif);
1742 while (dpif_flow_dump_next(&dump, &key, &key_len, NULL, NULL, &stats)) {
1743 struct facet *facet;
1746 if (odp_flow_key_to_flow(key, key_len, &flow)) {
1750 odp_flow_key_format(key, key_len, &s);
1751 VLOG_WARN_RL(&rl, "failed to convert ODP flow key to flow: %s",
1757 facet = facet_find(p, &flow);
1759 if (facet && facet->installed) {
1761 if (stats->n_packets >= facet->dp_packet_count) {
1762 uint64_t extra = stats->n_packets - facet->dp_packet_count;
1763 facet->packet_count += extra;
1765 VLOG_WARN_RL(&rl, "unexpected packet count from the datapath");
1768 if (stats->n_bytes >= facet->dp_byte_count) {
1769 facet->byte_count += stats->n_bytes - facet->dp_byte_count;
1771 VLOG_WARN_RL(&rl, "unexpected byte count from datapath");
1774 facet->dp_packet_count = stats->n_packets;
1775 facet->dp_byte_count = stats->n_bytes;
1777 facet_update_time(p, facet, stats->used);
1778 facet_account(p, facet, stats->n_bytes);
1779 facet_push_stats(facet);
1781 /* There's a flow in the datapath that we know nothing about.
1783 COVERAGE_INC(facet_unexpected);
1784 dpif_flow_del(p->dpif, key, key_len, NULL);
1787 dpif_flow_dump_done(&dump);
1790 /* Calculates and returns the number of milliseconds of idle time after which
1791 * facets should expire from the datapath and we should fold their statistics
1792 * into their parent rules in userspace. */
1794 facet_max_idle(const struct ofproto_dpif *ofproto)
1797 * Idle time histogram.
1799 * Most of the time a switch has a relatively small number of facets. When
1800 * this is the case we might as well keep statistics for all of them in
1801 * userspace and to cache them in the kernel datapath for performance as
1804 * As the number of facets increases, the memory required to maintain
1805 * statistics about them in userspace and in the kernel becomes
1806 * significant. However, with a large number of facets it is likely that
1807 * only a few of them are "heavy hitters" that consume a large amount of
1808 * bandwidth. At this point, only heavy hitters are worth caching in the
1809 * kernel and maintaining in userspaces; other facets we can discard.
1811 * The technique used to compute the idle time is to build a histogram with
1812 * N_BUCKETS buckets whose width is BUCKET_WIDTH msecs each. Each facet
1813 * that is installed in the kernel gets dropped in the appropriate bucket.
1814 * After the histogram has been built, we compute the cutoff so that only
1815 * the most-recently-used 1% of facets (but at least 1000 flows) are kept
1816 * cached. At least the most-recently-used bucket of facets is kept, so
1817 * actually an arbitrary number of facets can be kept in any given
1818 * expiration run (though the next run will delete most of those unless
1819 * they receive additional data).
1821 * This requires a second pass through the facets, in addition to the pass
1822 * made by update_stats(), because the former function never looks
1823 * at uninstallable facets.
1825 enum { BUCKET_WIDTH = ROUND_UP(100, TIME_UPDATE_INTERVAL) };
1826 enum { N_BUCKETS = 5000 / BUCKET_WIDTH };
1827 int buckets[N_BUCKETS] = { 0 };
1828 struct facet *facet;
1833 total = hmap_count(&ofproto->facets);
1834 if (total <= 1000) {
1835 return N_BUCKETS * BUCKET_WIDTH;
1838 /* Build histogram. */
1840 HMAP_FOR_EACH (facet, hmap_node, &ofproto->facets) {
1841 long long int idle = now - facet->used;
1842 int bucket = (idle <= 0 ? 0
1843 : idle >= BUCKET_WIDTH * N_BUCKETS ? N_BUCKETS - 1
1844 : (unsigned int) idle / BUCKET_WIDTH);
1848 /* Find the first bucket whose flows should be expired. */
1849 for (bucket = 0; bucket < N_BUCKETS; bucket++) {
1850 if (buckets[bucket]) {
1853 subtotal += buckets[bucket++];
1854 } while (bucket < N_BUCKETS && subtotal < MAX(1000, total / 100));
1859 if (VLOG_IS_DBG_ENABLED()) {
1863 ds_put_cstr(&s, "keep");
1864 for (i = 0; i < N_BUCKETS; i++) {
1866 ds_put_cstr(&s, ", drop");
1869 ds_put_format(&s, " %d:%d", i * BUCKET_WIDTH, buckets[i]);
1872 VLOG_INFO("%s: %s (msec:count)", ofproto->up.name, ds_cstr(&s));
1876 return bucket * BUCKET_WIDTH;
1880 facet_active_timeout(struct ofproto_dpif *ofproto, struct facet *facet)
1882 if (ofproto->netflow && !facet_is_controller_flow(facet) &&
1883 netflow_active_timeout_expired(ofproto->netflow, &facet->nf_flow)) {
1884 struct ofexpired expired;
1886 if (facet->installed) {
1887 struct dpif_flow_stats stats;
1889 facet_put__(ofproto, facet, facet->actions, facet->actions_len,
1891 facet_update_stats(ofproto, facet, &stats);
1894 expired.flow = facet->flow;
1895 expired.packet_count = facet->packet_count;
1896 expired.byte_count = facet->byte_count;
1897 expired.used = facet->used;
1898 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
1903 expire_facets(struct ofproto_dpif *ofproto, int dp_max_idle)
1905 long long int cutoff = time_msec() - dp_max_idle;
1906 struct facet *facet, *next_facet;
1908 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
1909 facet_active_timeout(ofproto, facet);
1910 if (facet->used < cutoff) {
1911 facet_remove(ofproto, facet);
1916 /* If 'rule' is an OpenFlow rule, that has expired according to OpenFlow rules,
1917 * then delete it entirely. */
1919 rule_expire(struct rule_dpif *rule)
1921 struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
1922 struct facet *facet, *next_facet;
1926 /* Has 'rule' expired? */
1928 if (rule->up.hard_timeout
1929 && now > rule->up.created + rule->up.hard_timeout * 1000) {
1930 reason = OFPRR_HARD_TIMEOUT;
1931 } else if (rule->up.idle_timeout && list_is_empty(&rule->facets)
1932 && now > rule->used + rule->up.idle_timeout * 1000) {
1933 reason = OFPRR_IDLE_TIMEOUT;
1938 COVERAGE_INC(ofproto_dpif_expired);
1940 /* Update stats. (This is a no-op if the rule expired due to an idle
1941 * timeout, because that only happens when the rule has no facets left.) */
1942 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
1943 facet_remove(ofproto, facet);
1946 /* Get rid of the rule. */
1947 ofproto_rule_expire(&rule->up, reason);
1952 /* Creates and returns a new facet owned by 'rule', given a 'flow' and an
1953 * example 'packet' within that flow.
1955 * The caller must already have determined that no facet with an identical
1956 * 'flow' exists in 'ofproto' and that 'flow' is the best match for 'rule' in
1957 * the ofproto's classifier table. */
1958 static struct facet *
1959 facet_create(struct rule_dpif *rule, const struct flow *flow,
1960 const struct ofpbuf *packet)
1962 struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
1963 struct facet *facet;
1965 facet = xzalloc(sizeof *facet);
1966 facet->used = time_msec();
1967 hmap_insert(&ofproto->facets, &facet->hmap_node, flow_hash(flow, 0));
1968 list_push_back(&rule->facets, &facet->list_node);
1970 facet->flow = *flow;
1971 netflow_flow_init(&facet->nf_flow);
1972 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, facet->used);
1974 facet_make_actions(ofproto, facet, packet);
1980 facet_free(struct facet *facet)
1982 free(facet->actions);
1986 /* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
1987 * 'packet', which arrived on 'in_port'.
1989 * Takes ownership of 'packet'. */
1991 execute_odp_actions(struct ofproto_dpif *ofproto, const struct flow *flow,
1992 const struct nlattr *odp_actions, size_t actions_len,
1993 struct ofpbuf *packet)
1995 if (actions_len == NLA_ALIGN(NLA_HDRLEN + sizeof(uint64_t))
1996 && odp_actions->nla_type == ODP_ACTION_ATTR_CONTROLLER) {
1997 /* As an optimization, avoid a round-trip from userspace to kernel to
1998 * userspace. This also avoids possibly filling up kernel packet
1999 * buffers along the way. */
2000 struct dpif_upcall upcall;
2002 upcall.type = DPIF_UC_ACTION;
2003 upcall.packet = packet;
2006 upcall.userdata = nl_attr_get_u64(odp_actions);
2007 upcall.sample_pool = 0;
2008 upcall.actions = NULL;
2009 upcall.actions_len = 0;
2011 send_packet_in(ofproto, &upcall, flow, false);
2017 error = dpif_execute(ofproto->dpif, odp_actions, actions_len, packet);
2018 ofpbuf_delete(packet);
2023 /* Executes the actions indicated by 'facet' on 'packet' and credits 'facet''s
2024 * statistics appropriately. 'packet' must have at least sizeof(struct
2025 * ofp_packet_in) bytes of headroom.
2027 * For correct results, 'packet' must actually be in 'facet''s flow; that is,
2028 * applying flow_extract() to 'packet' would yield the same flow as
2031 * 'facet' must have accurately composed ODP actions; that is, it must not be
2032 * in need of revalidation.
2034 * Takes ownership of 'packet'. */
2036 facet_execute(struct ofproto_dpif *ofproto, struct facet *facet,
2037 struct ofpbuf *packet)
2039 struct dpif_flow_stats stats;
2041 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
2043 flow_extract_stats(&facet->flow, packet, &stats);
2044 stats.used = time_msec();
2045 if (execute_odp_actions(ofproto, &facet->flow,
2046 facet->actions, facet->actions_len, packet)) {
2047 facet_update_stats(ofproto, facet, &stats);
2051 /* Remove 'facet' from 'ofproto' and free up the associated memory:
2053 * - If 'facet' was installed in the datapath, uninstalls it and updates its
2054 * rule's statistics, via facet_uninstall().
2056 * - Removes 'facet' from its rule and from ofproto->facets.
2059 facet_remove(struct ofproto_dpif *ofproto, struct facet *facet)
2061 facet_uninstall(ofproto, facet);
2062 facet_flush_stats(ofproto, facet);
2063 hmap_remove(&ofproto->facets, &facet->hmap_node);
2064 list_remove(&facet->list_node);
2068 /* Composes the ODP actions for 'facet' based on its rule's actions. */
2070 facet_make_actions(struct ofproto_dpif *p, struct facet *facet,
2071 const struct ofpbuf *packet)
2073 const struct rule_dpif *rule = facet->rule;
2074 struct ofpbuf *odp_actions;
2075 struct action_xlate_ctx ctx;
2077 action_xlate_ctx_init(&ctx, p, &facet->flow, packet);
2078 odp_actions = xlate_actions(&ctx, rule->up.actions, rule->up.n_actions);
2079 facet->tags = ctx.tags;
2080 facet->may_install = ctx.may_set_up_flow;
2081 facet->nf_flow.output_iface = ctx.nf_output_iface;
2083 if (facet->actions_len != odp_actions->size
2084 || memcmp(facet->actions, odp_actions->data, odp_actions->size)) {
2085 free(facet->actions);
2086 facet->actions_len = odp_actions->size;
2087 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
2090 ofpbuf_delete(odp_actions);
2094 facet_put__(struct ofproto_dpif *ofproto, struct facet *facet,
2095 const struct nlattr *actions, size_t actions_len,
2096 struct dpif_flow_stats *stats)
2098 struct odputil_keybuf keybuf;
2099 enum dpif_flow_put_flags flags;
2102 flags = DPIF_FP_CREATE | DPIF_FP_MODIFY;
2104 flags |= DPIF_FP_ZERO_STATS;
2105 facet->dp_packet_count = 0;
2106 facet->dp_byte_count = 0;
2109 ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
2110 odp_flow_key_from_flow(&key, &facet->flow);
2112 return dpif_flow_put(ofproto->dpif, flags, key.data, key.size,
2113 actions, actions_len, stats);
2116 /* If 'facet' is installable, inserts or re-inserts it into 'p''s datapath. If
2117 * 'zero_stats' is true, clears any existing statistics from the datapath for
2120 facet_install(struct ofproto_dpif *p, struct facet *facet, bool zero_stats)
2122 struct dpif_flow_stats stats;
2124 if (facet->may_install
2125 && !facet_put__(p, facet, facet->actions, facet->actions_len,
2126 zero_stats ? &stats : NULL)) {
2127 facet->installed = true;
2132 facet_account(struct ofproto_dpif *ofproto,
2133 struct facet *facet, uint64_t extra_bytes)
2135 uint64_t total_bytes, n_bytes;
2136 struct ofbundle *in_bundle;
2137 const struct nlattr *a;
2142 total_bytes = facet->byte_count + extra_bytes;
2143 if (total_bytes <= facet->accounted_bytes) {
2146 n_bytes = total_bytes - facet->accounted_bytes;
2147 facet->accounted_bytes = total_bytes;
2149 /* Test that 'tags' is nonzero to ensure that only flows that include an
2150 * OFPP_NORMAL action are used for learning and bond slave rebalancing.
2151 * This works because OFPP_NORMAL always sets a nonzero tag value.
2153 * Feed information from the active flows back into the learning table to
2154 * ensure that table is always in sync with what is actually flowing
2155 * through the datapath. */
2157 || !is_admissible(ofproto, &facet->flow, false, &dummy,
2158 &vlan, &in_bundle)) {
2162 update_learning_table(ofproto, &facet->flow, vlan, in_bundle);
2164 if (!ofproto->has_bonded_bundles) {
2167 NL_ATTR_FOR_EACH_UNSAFE (a, left, facet->actions, facet->actions_len) {
2168 if (nl_attr_type(a) == ODP_ACTION_ATTR_OUTPUT) {
2169 struct ofport_dpif *port;
2171 port = get_odp_port(ofproto, nl_attr_get_u32(a));
2172 if (port && port->bundle && port->bundle->bond) {
2173 bond_account(port->bundle->bond, &facet->flow, vlan, n_bytes);
2179 /* If 'rule' is installed in the datapath, uninstalls it. */
2181 facet_uninstall(struct ofproto_dpif *p, struct facet *facet)
2183 if (facet->installed) {
2184 struct odputil_keybuf keybuf;
2185 struct dpif_flow_stats stats;
2188 ofpbuf_use_stack(&key, &keybuf, sizeof keybuf);
2189 odp_flow_key_from_flow(&key, &facet->flow);
2191 if (!dpif_flow_del(p->dpif, key.data, key.size, &stats)) {
2192 facet_update_stats(p, facet, &stats);
2194 facet->installed = false;
2195 facet->dp_packet_count = 0;
2196 facet->dp_byte_count = 0;
2198 assert(facet->dp_packet_count == 0);
2199 assert(facet->dp_byte_count == 0);
2203 /* Returns true if the only action for 'facet' is to send to the controller.
2204 * (We don't report NetFlow expiration messages for such facets because they
2205 * are just part of the control logic for the network, not real traffic). */
2207 facet_is_controller_flow(struct facet *facet)
2210 && facet->rule->up.n_actions == 1
2211 && action_outputs_to_port(&facet->rule->up.actions[0],
2212 htons(OFPP_CONTROLLER)));
2215 /* Folds all of 'facet''s statistics into its rule. Also updates the
2216 * accounting ofhook and emits a NetFlow expiration if appropriate. All of
2217 * 'facet''s statistics in the datapath should have been zeroed and folded into
2218 * its packet and byte counts before this function is called. */
2220 facet_flush_stats(struct ofproto_dpif *ofproto, struct facet *facet)
2222 assert(!facet->dp_byte_count);
2223 assert(!facet->dp_packet_count);
2225 facet_push_stats(facet);
2226 facet_account(ofproto, facet, 0);
2228 if (ofproto->netflow && !facet_is_controller_flow(facet)) {
2229 struct ofexpired expired;
2230 expired.flow = facet->flow;
2231 expired.packet_count = facet->packet_count;
2232 expired.byte_count = facet->byte_count;
2233 expired.used = facet->used;
2234 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
2237 facet->rule->packet_count += facet->packet_count;
2238 facet->rule->byte_count += facet->byte_count;
2240 /* Reset counters to prevent double counting if 'facet' ever gets
2242 facet->packet_count = 0;
2243 facet->byte_count = 0;
2244 facet->rs_packet_count = 0;
2245 facet->rs_byte_count = 0;
2246 facet->accounted_bytes = 0;
2248 netflow_flow_clear(&facet->nf_flow);
2251 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
2252 * Returns it if found, otherwise a null pointer.
2254 * The returned facet might need revalidation; use facet_lookup_valid()
2255 * instead if that is important. */
2256 static struct facet *
2257 facet_find(struct ofproto_dpif *ofproto, const struct flow *flow)
2259 struct facet *facet;
2261 HMAP_FOR_EACH_WITH_HASH (facet, hmap_node, flow_hash(flow, 0),
2263 if (flow_equal(flow, &facet->flow)) {
2271 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
2272 * Returns it if found, otherwise a null pointer.
2274 * The returned facet is guaranteed to be valid. */
2275 static struct facet *
2276 facet_lookup_valid(struct ofproto_dpif *ofproto, const struct flow *flow)
2278 struct facet *facet = facet_find(ofproto, flow);
2280 /* The facet we found might not be valid, since we could be in need of
2281 * revalidation. If it is not valid, don't return it. */
2283 && ofproto->need_revalidate
2284 && !facet_revalidate(ofproto, facet)) {
2285 COVERAGE_INC(facet_invalidated);
2292 /* Re-searches 'ofproto''s classifier for a rule matching 'facet':
2294 * - If the rule found is different from 'facet''s current rule, moves
2295 * 'facet' to the new rule and recompiles its actions.
2297 * - If the rule found is the same as 'facet''s current rule, leaves 'facet'
2298 * where it is and recompiles its actions anyway.
2300 * - If there is none, destroys 'facet'.
2302 * Returns true if 'facet' still exists, false if it has been destroyed. */
2304 facet_revalidate(struct ofproto_dpif *ofproto, struct facet *facet)
2306 struct action_xlate_ctx ctx;
2307 struct ofpbuf *odp_actions;
2308 struct rule_dpif *new_rule;
2309 bool actions_changed;
2311 COVERAGE_INC(facet_revalidate);
2313 /* Determine the new rule. */
2314 new_rule = rule_dpif_lookup(ofproto, &facet->flow);
2316 /* No new rule, so delete the facet. */
2317 facet_remove(ofproto, facet);
2321 /* Calculate new ODP actions.
2323 * We do not modify any 'facet' state yet, because we might need to, e.g.,
2324 * emit a NetFlow expiration and, if so, we need to have the old state
2325 * around to properly compose it. */
2326 action_xlate_ctx_init(&ctx, ofproto, &facet->flow, NULL);
2327 odp_actions = xlate_actions(&ctx,
2328 new_rule->up.actions, new_rule->up.n_actions);
2329 actions_changed = (facet->actions_len != odp_actions->size
2330 || memcmp(facet->actions, odp_actions->data,
2331 facet->actions_len));
2333 /* If the ODP actions changed or the installability changed, then we need
2334 * to talk to the datapath. */
2335 if (actions_changed || ctx.may_set_up_flow != facet->installed) {
2336 if (ctx.may_set_up_flow) {
2337 struct dpif_flow_stats stats;
2339 facet_put__(ofproto, facet,
2340 odp_actions->data, odp_actions->size, &stats);
2341 facet_update_stats(ofproto, facet, &stats);
2343 facet_uninstall(ofproto, facet);
2346 /* The datapath flow is gone or has zeroed stats, so push stats out of
2347 * 'facet' into 'rule'. */
2348 facet_flush_stats(ofproto, facet);
2351 /* Update 'facet' now that we've taken care of all the old state. */
2352 facet->tags = ctx.tags;
2353 facet->nf_flow.output_iface = ctx.nf_output_iface;
2354 facet->may_install = ctx.may_set_up_flow;
2355 if (actions_changed) {
2356 free(facet->actions);
2357 facet->actions_len = odp_actions->size;
2358 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
2360 if (facet->rule != new_rule) {
2361 COVERAGE_INC(facet_changed_rule);
2362 list_remove(&facet->list_node);
2363 list_push_back(&new_rule->facets, &facet->list_node);
2364 facet->rule = new_rule;
2365 facet->used = new_rule->up.created;
2366 facet->rs_used = facet->used;
2369 ofpbuf_delete(odp_actions);
2374 /* Updates 'facet''s used time. Caller is responsible for calling
2375 * facet_push_stats() to update the flows which 'facet' resubmits into. */
2377 facet_update_time(struct ofproto_dpif *ofproto, struct facet *facet,
2380 if (used > facet->used) {
2382 if (used > facet->rule->used) {
2383 facet->rule->used = used;
2385 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, used);
2389 /* Folds the statistics from 'stats' into the counters in 'facet'.
2391 * Because of the meaning of a facet's counters, it only makes sense to do this
2392 * if 'stats' are not tracked in the datapath, that is, if 'stats' represents a
2393 * packet that was sent by hand or if it represents statistics that have been
2394 * cleared out of the datapath. */
2396 facet_update_stats(struct ofproto_dpif *ofproto, struct facet *facet,
2397 const struct dpif_flow_stats *stats)
2399 if (stats->n_packets || stats->used > facet->used) {
2400 facet_update_time(ofproto, facet, stats->used);
2401 facet->packet_count += stats->n_packets;
2402 facet->byte_count += stats->n_bytes;
2403 facet_push_stats(facet);
2404 netflow_flow_update_flags(&facet->nf_flow, stats->tcp_flags);
2409 facet_push_stats(struct facet *facet)
2411 uint64_t rs_packets, rs_bytes;
2413 assert(facet->packet_count >= facet->rs_packet_count);
2414 assert(facet->byte_count >= facet->rs_byte_count);
2415 assert(facet->used >= facet->rs_used);
2417 rs_packets = facet->packet_count - facet->rs_packet_count;
2418 rs_bytes = facet->byte_count - facet->rs_byte_count;
2420 if (rs_packets || rs_bytes || facet->used > facet->rs_used) {
2421 facet->rs_packet_count = facet->packet_count;
2422 facet->rs_byte_count = facet->byte_count;
2423 facet->rs_used = facet->used;
2425 flow_push_stats(facet->rule, &facet->flow,
2426 rs_packets, rs_bytes, facet->used);
2430 struct ofproto_push {
2431 struct action_xlate_ctx ctx;
2438 push_resubmit(struct action_xlate_ctx *ctx, struct rule_dpif *rule)
2440 struct ofproto_push *push = CONTAINER_OF(ctx, struct ofproto_push, ctx);
2443 rule->packet_count += push->packets;
2444 rule->byte_count += push->bytes;
2445 rule->used = MAX(push->used, rule->used);
2449 /* Pushes flow statistics to the rules which 'flow' resubmits into given
2450 * 'rule''s actions. */
2452 flow_push_stats(const struct rule_dpif *rule,
2453 struct flow *flow, uint64_t packets, uint64_t bytes,
2456 struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
2457 struct ofproto_push push;
2459 push.packets = packets;
2463 action_xlate_ctx_init(&push.ctx, ofproto, flow, NULL);
2464 push.ctx.resubmit_hook = push_resubmit;
2465 ofpbuf_delete(xlate_actions(&push.ctx,
2466 rule->up.actions, rule->up.n_actions));
2471 static struct rule_dpif *
2472 rule_dpif_lookup(struct ofproto_dpif *ofproto, const struct flow *flow)
2474 return rule_dpif_cast(rule_from_cls_rule(
2475 classifier_lookup(&ofproto->up.tables[0],
2479 static struct rule *
2482 struct rule_dpif *rule = xmalloc(sizeof *rule);
2487 rule_dealloc(struct rule *rule_)
2489 struct rule_dpif *rule = rule_dpif_cast(rule_);
2494 rule_construct(struct rule *rule_)
2496 struct rule_dpif *rule = rule_dpif_cast(rule_);
2497 struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
2498 struct rule_dpif *old_rule;
2501 error = validate_actions(rule->up.actions, rule->up.n_actions,
2502 &rule->up.cr.flow, ofproto->max_ports);
2507 old_rule = rule_dpif_cast(rule_from_cls_rule(classifier_find_rule_exactly(
2508 &ofproto->up.tables[0],
2511 ofproto_rule_destroy(&old_rule->up);
2514 rule->used = rule->up.created;
2515 rule->packet_count = 0;
2516 rule->byte_count = 0;
2517 list_init(&rule->facets);
2518 classifier_insert(&ofproto->up.tables[0], &rule->up.cr);
2520 ofproto->need_revalidate = true;
2526 rule_destruct(struct rule *rule_)
2528 struct rule_dpif *rule = rule_dpif_cast(rule_);
2529 struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
2530 struct facet *facet, *next_facet;
2532 classifier_remove(&ofproto->up.tables[0], &rule->up.cr);
2533 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
2534 facet_revalidate(ofproto, facet);
2536 ofproto->need_revalidate = true;
2540 rule_get_stats(struct rule *rule_, uint64_t *packets, uint64_t *bytes)
2542 struct rule_dpif *rule = rule_dpif_cast(rule_);
2543 struct facet *facet;
2545 /* Start from historical data for 'rule' itself that are no longer tracked
2546 * in facets. This counts, for example, facets that have expired. */
2547 *packets = rule->packet_count;
2548 *bytes = rule->byte_count;
2550 /* Add any statistics that are tracked by facets. This includes
2551 * statistical data recently updated by ofproto_update_stats() as well as
2552 * stats for packets that were executed "by hand" via dpif_execute(). */
2553 LIST_FOR_EACH (facet, list_node, &rule->facets) {
2554 *packets += facet->packet_count;
2555 *bytes += facet->byte_count;
2560 rule_execute(struct rule *rule_, struct flow *flow, struct ofpbuf *packet)
2562 struct rule_dpif *rule = rule_dpif_cast(rule_);
2563 struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
2564 struct action_xlate_ctx ctx;
2565 struct ofpbuf *odp_actions;
2566 struct facet *facet;
2569 /* First look for a related facet. If we find one, account it to that. */
2570 facet = facet_lookup_valid(ofproto, flow);
2571 if (facet && facet->rule == rule) {
2572 facet_execute(ofproto, facet, packet);
2576 /* Otherwise, if 'rule' is in fact the correct rule for 'packet', then
2577 * create a new facet for it and use that. */
2578 if (rule_dpif_lookup(ofproto, flow) == rule) {
2579 facet = facet_create(rule, flow, packet);
2580 facet_execute(ofproto, facet, packet);
2581 facet_install(ofproto, facet, true);
2585 /* We can't account anything to a facet. If we were to try, then that
2586 * facet would have a non-matching rule, busting our invariants. */
2587 action_xlate_ctx_init(&ctx, ofproto, flow, packet);
2588 odp_actions = xlate_actions(&ctx, rule->up.actions, rule->up.n_actions);
2589 size = packet->size;
2590 if (execute_odp_actions(ofproto, flow, odp_actions->data,
2591 odp_actions->size, packet)) {
2592 rule->used = time_msec();
2593 rule->packet_count++;
2594 rule->byte_count += size;
2595 flow_push_stats(rule, flow, 1, size, rule->used);
2597 ofpbuf_delete(odp_actions);
2603 rule_modify_actions(struct rule *rule_,
2604 const union ofp_action *actions, size_t n_actions)
2606 struct rule_dpif *rule = rule_dpif_cast(rule_);
2607 struct ofproto_dpif *ofproto = ofproto_dpif_cast(rule->up.ofproto);
2610 error = validate_actions(actions, n_actions, &rule->up.cr.flow,
2611 ofproto->max_ports);
2613 ofproto->need_revalidate = true;
2618 /* Sends 'packet' out of port 'odp_port' within 'ofproto'. If 'vlan_tci' is
2619 * zero the packet will not have any 802.1Q hader; if it is nonzero, then the
2620 * packet will be sent with the VLAN TCI specified by 'vlan_tci & ~VLAN_CFI'.
2622 * Returns 0 if successful, otherwise a positive errno value. */
2624 send_packet(struct ofproto_dpif *ofproto, uint32_t odp_port, uint16_t vlan_tci,
2625 const struct ofpbuf *packet)
2627 struct ofpbuf odp_actions;
2630 ofpbuf_init(&odp_actions, 32);
2631 if (vlan_tci != 0) {
2632 nl_msg_put_u32(&odp_actions, ODP_ACTION_ATTR_SET_DL_TCI,
2633 ntohs(vlan_tci & ~VLAN_CFI));
2635 nl_msg_put_u32(&odp_actions, ODP_ACTION_ATTR_OUTPUT, odp_port);
2636 error = dpif_execute(ofproto->dpif, odp_actions.data, odp_actions.size,
2638 ofpbuf_uninit(&odp_actions);
2641 VLOG_WARN_RL(&rl, "%s: failed to send packet on port %"PRIu32" (%s)",
2642 ofproto->up.name, odp_port, strerror(error));
2647 /* OpenFlow to ODP action translation. */
2649 static void do_xlate_actions(const union ofp_action *in, size_t n_in,
2650 struct action_xlate_ctx *ctx);
2651 static bool xlate_normal(struct action_xlate_ctx *);
2654 add_output_action(struct action_xlate_ctx *ctx, uint16_t ofp_port)
2656 const struct ofport_dpif *ofport = get_ofp_port(ctx->ofproto, ofp_port);
2657 uint16_t odp_port = ofp_port_to_odp_port(ofp_port);
2660 if (ofport->up.opp.config & htonl(OFPPC_NO_FWD)) {
2661 /* Forwarding disabled on port. */
2666 * We don't have an ofport record for this port, but it doesn't hurt to
2667 * allow forwarding to it anyhow. Maybe such a port will appear later
2668 * and we're pre-populating the flow table.
2672 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_OUTPUT, odp_port);
2673 ctx->nf_output_iface = ofp_port;
2677 xlate_table_action(struct action_xlate_ctx *ctx, uint16_t in_port)
2679 if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
2680 struct rule_dpif *rule;
2681 uint16_t old_in_port;
2683 /* Look up a flow with 'in_port' as the input port. Then restore the
2684 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2685 * have surprising behavior). */
2686 old_in_port = ctx->flow.in_port;
2687 ctx->flow.in_port = in_port;
2688 rule = rule_dpif_lookup(ctx->ofproto, &ctx->flow);
2689 ctx->flow.in_port = old_in_port;
2691 if (ctx->resubmit_hook) {
2692 ctx->resubmit_hook(ctx, rule);
2697 do_xlate_actions(rule->up.actions, rule->up.n_actions, ctx);
2701 static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
2703 VLOG_ERR_RL(&recurse_rl, "NXAST_RESUBMIT recursed over %d times",
2704 MAX_RESUBMIT_RECURSION);
2709 flood_packets(struct ofproto_dpif *ofproto,
2710 uint16_t ofp_in_port, ovs_be32 mask,
2711 uint16_t *nf_output_iface, struct ofpbuf *odp_actions)
2713 struct ofport_dpif *ofport;
2715 HMAP_FOR_EACH (ofport, up.hmap_node, &ofproto->up.ports) {
2716 uint16_t ofp_port = ofport->up.ofp_port;
2717 if (ofp_port != ofp_in_port && !(ofport->up.opp.config & mask)) {
2718 nl_msg_put_u32(odp_actions, ODP_ACTION_ATTR_OUTPUT,
2722 *nf_output_iface = NF_OUT_FLOOD;
2726 xlate_output_action__(struct action_xlate_ctx *ctx,
2727 uint16_t port, uint16_t max_len)
2729 uint16_t prev_nf_output_iface = ctx->nf_output_iface;
2731 ctx->nf_output_iface = NF_OUT_DROP;
2735 add_output_action(ctx, ctx->flow.in_port);
2738 xlate_table_action(ctx, ctx->flow.in_port);
2744 flood_packets(ctx->ofproto, ctx->flow.in_port, htonl(OFPPC_NO_FLOOD),
2745 &ctx->nf_output_iface, ctx->odp_actions);
2748 flood_packets(ctx->ofproto, ctx->flow.in_port, htonl(0),
2749 &ctx->nf_output_iface, ctx->odp_actions);
2751 case OFPP_CONTROLLER:
2752 nl_msg_put_u64(ctx->odp_actions, ODP_ACTION_ATTR_CONTROLLER, max_len);
2755 add_output_action(ctx, OFPP_LOCAL);
2758 if (port != ctx->flow.in_port) {
2759 add_output_action(ctx, port);
2764 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2765 ctx->nf_output_iface = NF_OUT_FLOOD;
2766 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
2767 ctx->nf_output_iface = prev_nf_output_iface;
2768 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2769 ctx->nf_output_iface != NF_OUT_FLOOD) {
2770 ctx->nf_output_iface = NF_OUT_MULTI;
2775 xlate_output_action(struct action_xlate_ctx *ctx,
2776 const struct ofp_action_output *oao)
2778 xlate_output_action__(ctx, ntohs(oao->port), ntohs(oao->max_len));
2781 /* If the final ODP action in 'ctx' is "pop priority", drop it, as an
2782 * optimization, because we're going to add another action that sets the
2783 * priority immediately after, or because there are no actions following the
2786 remove_pop_action(struct action_xlate_ctx *ctx)
2788 if (ctx->odp_actions->size == ctx->last_pop_priority) {
2789 ctx->odp_actions->size -= NLA_ALIGN(NLA_HDRLEN);
2790 ctx->last_pop_priority = -1;
2795 add_pop_action(struct action_xlate_ctx *ctx)
2797 if (ctx->odp_actions->size != ctx->last_pop_priority) {
2798 nl_msg_put_flag(ctx->odp_actions, ODP_ACTION_ATTR_POP_PRIORITY);
2799 ctx->last_pop_priority = ctx->odp_actions->size;
2804 xlate_enqueue_action(struct action_xlate_ctx *ctx,
2805 const struct ofp_action_enqueue *oae)
2807 uint16_t ofp_port, odp_port;
2811 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(oae->queue_id),
2814 /* Fall back to ordinary output action. */
2815 xlate_output_action__(ctx, ntohs(oae->port), 0);
2819 /* Figure out ODP output port. */
2820 ofp_port = ntohs(oae->port);
2821 if (ofp_port == OFPP_IN_PORT) {
2822 ofp_port = ctx->flow.in_port;
2824 odp_port = ofp_port_to_odp_port(ofp_port);
2826 /* Add ODP actions. */
2827 remove_pop_action(ctx);
2828 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_SET_PRIORITY, priority);
2829 add_output_action(ctx, odp_port);
2830 add_pop_action(ctx);
2832 /* Update NetFlow output port. */
2833 if (ctx->nf_output_iface == NF_OUT_DROP) {
2834 ctx->nf_output_iface = odp_port;
2835 } else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
2836 ctx->nf_output_iface = NF_OUT_MULTI;
2841 xlate_set_queue_action(struct action_xlate_ctx *ctx,
2842 const struct nx_action_set_queue *nasq)
2847 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(nasq->queue_id),
2850 /* Couldn't translate queue to a priority, so ignore. A warning
2851 * has already been logged. */
2855 remove_pop_action(ctx);
2856 nl_msg_put_u32(ctx->odp_actions, ODP_ACTION_ATTR_SET_PRIORITY, priority);
2860 xlate_set_dl_tci(struct action_xlate_ctx *ctx)
2862 ovs_be16 tci = ctx->flow.vlan_tci;
2863 if (!(tci & htons(VLAN_CFI))) {
2864 nl_msg_put_flag(ctx->odp_actions, ODP_ACTION_ATTR_STRIP_VLAN);
2866 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_TCI,
2867 tci & ~htons(VLAN_CFI));
2871 struct xlate_reg_state {
2877 save_reg_state(const struct action_xlate_ctx *ctx,
2878 struct xlate_reg_state *state)
2880 state->vlan_tci = ctx->flow.vlan_tci;
2881 state->tun_id = ctx->flow.tun_id;
2885 update_reg_state(struct action_xlate_ctx *ctx,
2886 const struct xlate_reg_state *state)
2888 if (ctx->flow.vlan_tci != state->vlan_tci) {
2889 xlate_set_dl_tci(ctx);
2891 if (ctx->flow.tun_id != state->tun_id) {
2892 nl_msg_put_be64(ctx->odp_actions,
2893 ODP_ACTION_ATTR_SET_TUNNEL, ctx->flow.tun_id);
2898 xlate_autopath(struct action_xlate_ctx *ctx,
2899 const struct nx_action_autopath *naa)
2901 uint16_t ofp_port = ntohl(naa->id);
2902 struct ofport_dpif *port = get_ofp_port(ctx->ofproto, ofp_port);
2904 if (!port || !port->bundle) {
2905 ofp_port = OFPP_NONE;
2906 } else if (port->bundle->bond) {
2907 /* Autopath does not support VLAN hashing. */
2908 struct ofport_dpif *slave = bond_choose_output_slave(
2909 port->bundle->bond, &ctx->flow, OFP_VLAN_NONE, &ctx->tags);
2911 ofp_port = slave->up.ofp_port;
2914 autopath_execute(naa, &ctx->flow, ofp_port);
2918 xlate_nicira_action(struct action_xlate_ctx *ctx,
2919 const struct nx_action_header *nah)
2921 const struct nx_action_resubmit *nar;
2922 const struct nx_action_set_tunnel *nast;
2923 const struct nx_action_set_queue *nasq;
2924 const struct nx_action_multipath *nam;
2925 const struct nx_action_autopath *naa;
2926 enum nx_action_subtype subtype = ntohs(nah->subtype);
2927 struct xlate_reg_state state;
2930 assert(nah->vendor == htonl(NX_VENDOR_ID));
2932 case NXAST_RESUBMIT:
2933 nar = (const struct nx_action_resubmit *) nah;
2934 xlate_table_action(ctx, ntohs(nar->in_port));
2937 case NXAST_SET_TUNNEL:
2938 nast = (const struct nx_action_set_tunnel *) nah;
2939 tun_id = htonll(ntohl(nast->tun_id));
2940 nl_msg_put_be64(ctx->odp_actions, ODP_ACTION_ATTR_SET_TUNNEL, tun_id);
2941 ctx->flow.tun_id = tun_id;
2944 case NXAST_DROP_SPOOFED_ARP:
2945 if (ctx->flow.dl_type == htons(ETH_TYPE_ARP)) {
2946 nl_msg_put_flag(ctx->odp_actions,
2947 ODP_ACTION_ATTR_DROP_SPOOFED_ARP);
2951 case NXAST_SET_QUEUE:
2952 nasq = (const struct nx_action_set_queue *) nah;
2953 xlate_set_queue_action(ctx, nasq);
2956 case NXAST_POP_QUEUE:
2957 add_pop_action(ctx);
2960 case NXAST_REG_MOVE:
2961 save_reg_state(ctx, &state);
2962 nxm_execute_reg_move((const struct nx_action_reg_move *) nah,
2964 update_reg_state(ctx, &state);
2967 case NXAST_REG_LOAD:
2968 save_reg_state(ctx, &state);
2969 nxm_execute_reg_load((const struct nx_action_reg_load *) nah,
2971 update_reg_state(ctx, &state);
2975 /* Nothing to do. */
2978 case NXAST_SET_TUNNEL64:
2979 tun_id = ((const struct nx_action_set_tunnel64 *) nah)->tun_id;
2980 nl_msg_put_be64(ctx->odp_actions, ODP_ACTION_ATTR_SET_TUNNEL, tun_id);
2981 ctx->flow.tun_id = tun_id;
2984 case NXAST_MULTIPATH:
2985 nam = (const struct nx_action_multipath *) nah;
2986 multipath_execute(nam, &ctx->flow);
2989 case NXAST_AUTOPATH:
2990 naa = (const struct nx_action_autopath *) nah;
2991 xlate_autopath(ctx, naa);
2994 /* If you add a new action here that modifies flow data, don't forget to
2995 * update the flow key in ctx->flow at the same time. */
2997 case NXAST_SNAT__OBSOLETE:
2999 VLOG_DBG_RL(&rl, "unknown Nicira action type %d", (int) subtype);
3005 do_xlate_actions(const union ofp_action *in, size_t n_in,
3006 struct action_xlate_ctx *ctx)
3008 const struct ofport_dpif *port;
3009 struct actions_iterator iter;
3010 const union ofp_action *ia;
3012 port = get_ofp_port(ctx->ofproto, ctx->flow.in_port);
3014 && port->up.opp.config & htonl(OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
3015 port->up.opp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
3016 ? htonl(OFPPC_NO_RECV_STP)
3017 : htonl(OFPPC_NO_RECV))) {
3018 /* Drop this flow. */
3022 for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
3023 enum ofp_action_type type = ntohs(ia->type);
3024 const struct ofp_action_dl_addr *oada;
3028 xlate_output_action(ctx, &ia->output);
3031 case OFPAT_SET_VLAN_VID:
3032 ctx->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
3033 ctx->flow.vlan_tci |= ia->vlan_vid.vlan_vid | htons(VLAN_CFI);
3034 xlate_set_dl_tci(ctx);
3037 case OFPAT_SET_VLAN_PCP:
3038 ctx->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
3039 ctx->flow.vlan_tci |= htons(
3040 (ia->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
3041 xlate_set_dl_tci(ctx);
3044 case OFPAT_STRIP_VLAN:
3045 ctx->flow.vlan_tci = htons(0);
3046 xlate_set_dl_tci(ctx);
3049 case OFPAT_SET_DL_SRC:
3050 oada = ((struct ofp_action_dl_addr *) ia);
3051 nl_msg_put_unspec(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_SRC,
3052 oada->dl_addr, ETH_ADDR_LEN);
3053 memcpy(ctx->flow.dl_src, oada->dl_addr, ETH_ADDR_LEN);
3056 case OFPAT_SET_DL_DST:
3057 oada = ((struct ofp_action_dl_addr *) ia);
3058 nl_msg_put_unspec(ctx->odp_actions, ODP_ACTION_ATTR_SET_DL_DST,
3059 oada->dl_addr, ETH_ADDR_LEN);
3060 memcpy(ctx->flow.dl_dst, oada->dl_addr, ETH_ADDR_LEN);
3063 case OFPAT_SET_NW_SRC:
3064 nl_msg_put_be32(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_SRC,
3065 ia->nw_addr.nw_addr);
3066 ctx->flow.nw_src = ia->nw_addr.nw_addr;
3069 case OFPAT_SET_NW_DST:
3070 nl_msg_put_be32(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_DST,
3071 ia->nw_addr.nw_addr);
3072 ctx->flow.nw_dst = ia->nw_addr.nw_addr;
3075 case OFPAT_SET_NW_TOS:
3076 nl_msg_put_u8(ctx->odp_actions, ODP_ACTION_ATTR_SET_NW_TOS,
3078 ctx->flow.nw_tos = ia->nw_tos.nw_tos;
3081 case OFPAT_SET_TP_SRC:
3082 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_TP_SRC,
3083 ia->tp_port.tp_port);
3084 ctx->flow.tp_src = ia->tp_port.tp_port;
3087 case OFPAT_SET_TP_DST:
3088 nl_msg_put_be16(ctx->odp_actions, ODP_ACTION_ATTR_SET_TP_DST,
3089 ia->tp_port.tp_port);
3090 ctx->flow.tp_dst = ia->tp_port.tp_port;
3094 xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
3098 xlate_enqueue_action(ctx, (const struct ofp_action_enqueue *) ia);
3102 VLOG_DBG_RL(&rl, "unknown action type %d", (int) type);
3109 action_xlate_ctx_init(struct action_xlate_ctx *ctx,
3110 struct ofproto_dpif *ofproto, const struct flow *flow,
3111 const struct ofpbuf *packet)
3113 ctx->ofproto = ofproto;
3115 ctx->packet = packet;
3116 ctx->resubmit_hook = NULL;
3117 ctx->check_special = true;
3120 static struct ofpbuf *
3121 xlate_actions(struct action_xlate_ctx *ctx,
3122 const union ofp_action *in, size_t n_in)
3124 COVERAGE_INC(ofproto_dpif_xlate);
3126 ctx->odp_actions = ofpbuf_new(512);
3128 ctx->may_set_up_flow = true;
3129 ctx->nf_output_iface = NF_OUT_DROP;
3131 ctx->last_pop_priority = -1;
3133 if (ctx->check_special
3134 && process_special(ctx->ofproto, &ctx->flow, ctx->packet)) {
3135 ctx->may_set_up_flow = false;
3137 do_xlate_actions(in, n_in, ctx);
3140 remove_pop_action(ctx);
3142 /* Check with in-band control to see if we're allowed to set up this
3144 if (!connmgr_may_set_up_flow(ctx->ofproto->up.connmgr, &ctx->flow,
3145 ctx->odp_actions->data,
3146 ctx->odp_actions->size)) {
3147 ctx->may_set_up_flow = false;
3150 return ctx->odp_actions;
3153 /* OFPP_NORMAL implementation. */
3156 struct ofport_dpif *port;
3161 struct dst builtin[32];
3163 size_t n, allocated;
3166 static void dst_set_init(struct dst_set *);
3167 static void dst_set_add(struct dst_set *, const struct dst *);
3168 static void dst_set_free(struct dst_set *);
3170 static struct ofport_dpif *ofbundle_get_a_port(const struct ofbundle *);
3173 set_dst(struct action_xlate_ctx *ctx, struct dst *dst,
3174 const struct ofbundle *in_bundle, const struct ofbundle *out_bundle)
3176 dst->vlan = (out_bundle->vlan >= 0 ? OFP_VLAN_NONE
3177 : in_bundle->vlan >= 0 ? in_bundle->vlan
3178 : ctx->flow.vlan_tci == 0 ? OFP_VLAN_NONE
3179 : vlan_tci_to_vid(ctx->flow.vlan_tci));
3181 dst->port = (!out_bundle->bond
3182 ? ofbundle_get_a_port(out_bundle)
3183 : bond_choose_output_slave(out_bundle->bond, &ctx->flow,
3184 dst->vlan, &ctx->tags));
3186 return dst->port != NULL;
3190 mirror_mask_ffs(mirror_mask_t mask)
3192 BUILD_ASSERT_DECL(sizeof(unsigned int) >= sizeof(mask));
3197 dst_set_init(struct dst_set *set)
3199 set->dsts = set->builtin;
3201 set->allocated = ARRAY_SIZE(set->builtin);
3205 dst_set_add(struct dst_set *set, const struct dst *dst)
3207 if (set->n >= set->allocated) {
3208 size_t new_allocated;
3209 struct dst *new_dsts;
3211 new_allocated = set->allocated * 2;
3212 new_dsts = xmalloc(new_allocated * sizeof *new_dsts);
3213 memcpy(new_dsts, set->dsts, set->n * sizeof *new_dsts);
3217 set->dsts = new_dsts;
3218 set->allocated = new_allocated;
3220 set->dsts[set->n++] = *dst;
3224 dst_set_free(struct dst_set *set)
3226 if (set->dsts != set->builtin) {
3232 dst_is_duplicate(const struct dst_set *set, const struct dst *test)
3235 for (i = 0; i < set->n; i++) {
3236 if (set->dsts[i].vlan == test->vlan
3237 && set->dsts[i].port == test->port) {
3245 ofbundle_trunks_vlan(const struct ofbundle *bundle, uint16_t vlan)
3247 return bundle->vlan < 0 && vlan_bitmap_contains(bundle->trunks, vlan);
3251 ofbundle_includes_vlan(const struct ofbundle *bundle, uint16_t vlan)
3253 return vlan == bundle->vlan || ofbundle_trunks_vlan(bundle, vlan);
3256 /* Returns an arbitrary interface within 'bundle'. */
3257 static struct ofport_dpif *
3258 ofbundle_get_a_port(const struct ofbundle *bundle)
3260 return CONTAINER_OF(list_front(&bundle->ports),
3261 struct ofport_dpif, bundle_node);
3265 compose_dsts(struct action_xlate_ctx *ctx, uint16_t vlan,
3266 const struct ofbundle *in_bundle,
3267 const struct ofbundle *out_bundle, struct dst_set *set)
3271 if (out_bundle == OFBUNDLE_FLOOD) {
3272 struct ofbundle *bundle;
3274 HMAP_FOR_EACH (bundle, hmap_node, &ctx->ofproto->bundles) {
3275 if (bundle != in_bundle
3276 && ofbundle_includes_vlan(bundle, vlan)
3277 && bundle->floodable
3278 && !bundle->mirror_out
3279 && set_dst(ctx, &dst, in_bundle, bundle)) {
3280 dst_set_add(set, &dst);
3283 ctx->nf_output_iface = NF_OUT_FLOOD;
3284 } else if (out_bundle && set_dst(ctx, &dst, in_bundle, out_bundle)) {
3285 dst_set_add(set, &dst);
3286 ctx->nf_output_iface = dst.port->odp_port;
3291 vlan_is_mirrored(const struct ofmirror *m, int vlan)
3293 return vlan_bitmap_contains(m->vlans, vlan);
3297 compose_mirror_dsts(struct action_xlate_ctx *ctx,
3298 uint16_t vlan, const struct ofbundle *in_bundle,
3299 struct dst_set *set)
3301 struct ofproto_dpif *ofproto = ctx->ofproto;
3302 mirror_mask_t mirrors;
3306 mirrors = in_bundle->src_mirrors;
3307 for (i = 0; i < set->n; i++) {
3308 mirrors |= set->dsts[i].port->bundle->dst_mirrors;
3315 flow_vlan = vlan_tci_to_vid(ctx->flow.vlan_tci);
3316 if (flow_vlan == 0) {
3317 flow_vlan = OFP_VLAN_NONE;
3321 struct ofmirror *m = ofproto->mirrors[mirror_mask_ffs(mirrors) - 1];
3322 if (vlan_is_mirrored(m, vlan)) {
3326 if (set_dst(ctx, &dst, in_bundle, m->out)
3327 && !dst_is_duplicate(set, &dst)) {
3328 dst_set_add(set, &dst);
3331 struct ofbundle *bundle;
3333 HMAP_FOR_EACH (bundle, hmap_node, &ofproto->bundles) {
3334 if (ofbundle_includes_vlan(bundle, m->out_vlan)
3335 && set_dst(ctx, &dst, in_bundle, bundle))
3337 if (bundle->vlan < 0) {
3338 dst.vlan = m->out_vlan;
3340 if (dst_is_duplicate(set, &dst)) {
3344 /* Use the vlan tag on the original flow instead of
3345 * the one passed in the vlan parameter. This ensures
3346 * that we compare the vlan from before any implicit
3347 * tagging tags place. This is necessary because
3348 * dst->vlan is the final vlan, after removing implicit
3350 if (bundle == in_bundle && dst.vlan == flow_vlan) {
3351 /* Don't send out input port on same VLAN. */
3354 dst_set_add(set, &dst);
3359 mirrors &= mirrors - 1;
3364 compose_actions(struct action_xlate_ctx *ctx, uint16_t vlan,
3365 const struct ofbundle *in_bundle,
3366 const struct ofbundle *out_bundle)
3368 uint16_t initial_vlan, cur_vlan;
3369 const struct dst *dst;
3373 compose_dsts(ctx, vlan, in_bundle, out_bundle, &set);
3374 compose_mirror_dsts(ctx, vlan, in_bundle, &set);
3376 /* Output all the packets we can without having to change the VLAN. */
3377 initial_vlan = vlan_tci_to_vid(ctx->flow.vlan_tci);
3378 if (initial_vlan == 0) {
3379 initial_vlan = OFP_VLAN_NONE;
3381 for (dst = set.dsts; dst < &set.dsts[set.n]; dst++) {
3382 if (dst->vlan != initial_vlan) {
3385 nl_msg_put_u32(ctx->odp_actions,
3386 ODP_ACTION_ATTR_OUTPUT, dst->port->odp_port);
3389 /* Then output the rest. */
3390 cur_vlan = initial_vlan;
3391 for (dst = set.dsts; dst < &set.dsts[set.n]; dst++) {
3392 if (dst->vlan == initial_vlan) {
3395 if (dst->vlan != cur_vlan) {
3396 if (dst->vlan == OFP_VLAN_NONE) {
3397 nl_msg_put_flag(ctx->odp_actions, ODP_ACTION_ATTR_STRIP_VLAN);
3400 tci = htons(dst->vlan & VLAN_VID_MASK);
3401 tci |= ctx->flow.vlan_tci & htons(VLAN_PCP_MASK);
3402 nl_msg_put_be16(ctx->odp_actions,
3403 ODP_ACTION_ATTR_SET_DL_TCI, tci);
3405 cur_vlan = dst->vlan;
3407 nl_msg_put_u32(ctx->odp_actions,
3408 ODP_ACTION_ATTR_OUTPUT, dst->port->odp_port);
3414 /* Returns the effective vlan of a packet, taking into account both the
3415 * 802.1Q header and implicitly tagged ports. A value of 0 indicates that
3416 * the packet is untagged and -1 indicates it has an invalid header and
3417 * should be dropped. */
3419 flow_get_vlan(struct ofproto_dpif *ofproto, const struct flow *flow,
3420 struct ofbundle *in_bundle, bool have_packet)
3422 int vlan = vlan_tci_to_vid(flow->vlan_tci);
3423 if (in_bundle->vlan >= 0) {
3426 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3427 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
3428 "packet received on port %s configured with "
3429 "implicit VLAN %"PRIu16,
3430 ofproto->up.name, vlan,
3431 in_bundle->name, in_bundle->vlan);
3435 vlan = in_bundle->vlan;
3437 if (!ofbundle_includes_vlan(in_bundle, vlan)) {
3439 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3440 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
3441 "packet received on port %s not configured for "
3443 ofproto->up.name, vlan, in_bundle->name, vlan);
3452 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
3453 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
3454 * indicate this; newer upstream kernels use gratuitous ARP requests. */
3456 is_gratuitous_arp(const struct flow *flow)
3458 return (flow->dl_type == htons(ETH_TYPE_ARP)
3459 && eth_addr_is_broadcast(flow->dl_dst)
3460 && (flow->nw_proto == ARP_OP_REPLY
3461 || (flow->nw_proto == ARP_OP_REQUEST
3462 && flow->nw_src == flow->nw_dst)));
3466 update_learning_table(struct ofproto_dpif *ofproto,
3467 const struct flow *flow, int vlan,
3468 struct ofbundle *in_bundle)
3470 struct mac_entry *mac;
3472 if (!mac_learning_may_learn(ofproto->ml, flow->dl_src, vlan)) {
3476 mac = mac_learning_insert(ofproto->ml, flow->dl_src, vlan);
3477 if (is_gratuitous_arp(flow)) {
3478 /* We don't want to learn from gratuitous ARP packets that are
3479 * reflected back over bond slaves so we lock the learning table. */
3480 if (!in_bundle->bond) {
3481 mac_entry_set_grat_arp_lock(mac);
3482 } else if (mac_entry_is_grat_arp_locked(mac)) {
3487 if (mac_entry_is_new(mac) || mac->port.p != in_bundle) {
3488 /* The log messages here could actually be useful in debugging,
3489 * so keep the rate limit relatively high. */
3490 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
3491 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
3492 "on port %s in VLAN %d",
3493 ofproto->up.name, ETH_ADDR_ARGS(flow->dl_src),
3494 in_bundle->name, vlan);
3496 mac->port.p = in_bundle;
3497 tag_set_add(&ofproto->revalidate_set,
3498 mac_learning_changed(ofproto->ml, mac));
3502 /* Determines whether packets in 'flow' within 'br' should be forwarded or
3503 * dropped. Returns true if they may be forwarded, false if they should be
3506 * If 'have_packet' is true, it indicates that the caller is processing a
3507 * received packet. If 'have_packet' is false, then the caller is just
3508 * revalidating an existing flow because configuration has changed. Either
3509 * way, 'have_packet' only affects logging (there is no point in logging errors
3510 * during revalidation).
3512 * Sets '*in_portp' to the input port. This will be a null pointer if
3513 * flow->in_port does not designate a known input port (in which case
3514 * is_admissible() returns false).
3516 * When returning true, sets '*vlanp' to the effective VLAN of the input
3517 * packet, as returned by flow_get_vlan().
3519 * May also add tags to '*tags', although the current implementation only does
3520 * so in one special case.
3523 is_admissible(struct ofproto_dpif *ofproto, const struct flow *flow,
3525 tag_type *tags, int *vlanp, struct ofbundle **in_bundlep)
3527 struct ofport_dpif *in_port;
3528 struct ofbundle *in_bundle;
3531 /* Find the port and bundle for the received packet. */
3532 in_port = get_ofp_port(ofproto, flow->in_port);
3533 *in_bundlep = in_bundle = in_port->bundle;
3534 if (!in_port || !in_bundle) {
3535 /* No interface? Something fishy... */
3537 /* Odd. A few possible reasons here:
3539 * - We deleted a port but there are still a few packets queued up
3542 * - Someone externally added a port (e.g. "ovs-dpctl add-if") that
3543 * we don't know about.
3545 * - Packet arrived on the local port but the local port is not
3548 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3550 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
3552 ofproto->up.name, flow->in_port);
3556 *vlanp = vlan = flow_get_vlan(ofproto, flow, in_bundle, have_packet);
3561 /* Drop frames for reserved multicast addresses. */
3562 if (eth_addr_is_reserved(flow->dl_dst)) {
3566 /* Drop frames on bundles reserved for mirroring. */
3567 if (in_bundle->mirror_out) {
3569 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3570 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
3571 "%s, which is reserved exclusively for mirroring",
3572 ofproto->up.name, in_bundle->name);
3577 if (in_bundle->bond) {
3578 struct mac_entry *mac;
3580 switch (bond_check_admissibility(in_bundle->bond, in_port,
3581 flow->dl_dst, tags)) {
3588 case BV_DROP_IF_MOVED:
3589 mac = mac_learning_lookup(ofproto->ml, flow->dl_src, vlan, NULL);
3590 if (mac && mac->port.p != in_bundle &&
3591 (!is_gratuitous_arp(flow)
3592 || mac_entry_is_grat_arp_locked(mac))) {
3602 /* If the composed actions may be applied to any packet in the given 'flow',
3603 * returns true. Otherwise, the actions should only be applied to 'packet', or
3604 * not at all, if 'packet' was NULL. */
3606 xlate_normal(struct action_xlate_ctx *ctx)
3608 struct ofbundle *in_bundle;
3609 struct ofbundle *out_bundle;
3610 struct mac_entry *mac;
3613 /* Check whether we should drop packets in this flow. */
3614 if (!is_admissible(ctx->ofproto, &ctx->flow, ctx->packet != NULL,
3615 &ctx->tags, &vlan, &in_bundle)) {
3620 /* Learn source MAC (but don't try to learn from revalidation). */
3622 update_learning_table(ctx->ofproto, &ctx->flow, vlan, in_bundle);
3625 /* Determine output bundle. */
3626 mac = mac_learning_lookup(ctx->ofproto->ml, ctx->flow.dl_dst, vlan,
3629 out_bundle = mac->port.p;
3630 } else if (!ctx->packet && !eth_addr_is_multicast(ctx->flow.dl_dst)) {
3631 /* If we are revalidating but don't have a learning entry then eject
3632 * the flow. Installing a flow that floods packets opens up a window
3633 * of time where we could learn from a packet reflected on a bond and
3634 * blackhole packets before the learning table is updated to reflect
3635 * the correct port. */
3638 out_bundle = OFBUNDLE_FLOOD;
3641 /* Don't send packets out their input bundles. */
3642 if (in_bundle == out_bundle) {
3648 compose_actions(ctx, vlan, in_bundle, out_bundle);
3655 get_drop_frags(struct ofproto *ofproto_)
3657 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3660 dpif_get_drop_frags(ofproto->dpif, &drop_frags);
3665 set_drop_frags(struct ofproto *ofproto_, bool drop_frags)
3667 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3669 dpif_set_drop_frags(ofproto->dpif, drop_frags);
3673 packet_out(struct ofproto *ofproto_, struct ofpbuf *packet,
3674 const struct flow *flow,
3675 const union ofp_action *ofp_actions, size_t n_ofp_actions)
3677 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3680 error = validate_actions(ofp_actions, n_ofp_actions, flow,
3681 ofproto->max_ports);
3683 struct action_xlate_ctx ctx;
3684 struct ofpbuf *odp_actions;
3686 action_xlate_ctx_init(&ctx, ofproto, flow, packet);
3687 odp_actions = xlate_actions(&ctx, ofp_actions, n_ofp_actions);
3688 dpif_execute(ofproto->dpif, odp_actions->data, odp_actions->size,
3690 ofpbuf_delete(odp_actions);
3696 get_netflow_ids(const struct ofproto *ofproto_,
3697 uint8_t *engine_type, uint8_t *engine_id)
3699 struct ofproto_dpif *ofproto = ofproto_dpif_cast(ofproto_);
3701 dpif_get_netflow_ids(ofproto->dpif, engine_type, engine_id);
3704 static struct ofproto_dpif *
3705 ofproto_dpif_lookup(const char *name)
3707 struct ofproto *ofproto = ofproto_lookup(name);
3708 return (ofproto && ofproto->ofproto_class == &ofproto_dpif_class
3709 ? ofproto_dpif_cast(ofproto)
3714 ofproto_unixctl_fdb_show(struct unixctl_conn *conn,
3715 const char *args, void *aux OVS_UNUSED)
3717 struct ds ds = DS_EMPTY_INITIALIZER;
3718 const struct ofproto_dpif *ofproto;
3719 const struct mac_entry *e;
3721 ofproto = ofproto_dpif_lookup(args);
3723 unixctl_command_reply(conn, 501, "no such bridge");
3727 ds_put_cstr(&ds, " port VLAN MAC Age\n");
3728 LIST_FOR_EACH (e, lru_node, &ofproto->ml->lrus) {
3729 struct ofbundle *bundle = e->port.p;
3730 ds_put_format(&ds, "%5d %4d "ETH_ADDR_FMT" %3d\n",
3731 ofbundle_get_a_port(bundle)->odp_port,
3732 e->vlan, ETH_ADDR_ARGS(e->mac), mac_entry_age(e));
3734 unixctl_command_reply(conn, 200, ds_cstr(&ds));
3738 struct ofproto_trace {
3739 struct action_xlate_ctx ctx;
3745 trace_format_rule(struct ds *result, int level, const struct rule *rule)
3747 ds_put_char_multiple(result, '\t', level);
3749 ds_put_cstr(result, "No match\n");
3753 ds_put_format(result, "Rule: cookie=%#"PRIx64" ",
3754 ntohll(rule->flow_cookie));
3755 cls_rule_format(&rule->cr, result);
3756 ds_put_char(result, '\n');
3758 ds_put_char_multiple(result, '\t', level);
3759 ds_put_cstr(result, "OpenFlow ");
3760 ofp_print_actions(result, (const struct ofp_action_header *) rule->actions,
3761 rule->n_actions * sizeof *rule->actions);
3762 ds_put_char(result, '\n');
3766 trace_format_flow(struct ds *result, int level, const char *title,
3767 struct ofproto_trace *trace)
3769 ds_put_char_multiple(result, '\t', level);
3770 ds_put_format(result, "%s: ", title);
3771 if (flow_equal(&trace->ctx.flow, &trace->flow)) {
3772 ds_put_cstr(result, "unchanged");
3774 flow_format(result, &trace->ctx.flow);
3775 trace->flow = trace->ctx.flow;
3777 ds_put_char(result, '\n');
3781 trace_resubmit(struct action_xlate_ctx *ctx, struct rule_dpif *rule)
3783 struct ofproto_trace *trace = CONTAINER_OF(ctx, struct ofproto_trace, ctx);
3784 struct ds *result = trace->result;
3786 ds_put_char(result, '\n');
3787 trace_format_flow(result, ctx->recurse + 1, "Resubmitted flow", trace);
3788 trace_format_rule(result, ctx->recurse + 1, &rule->up);
3792 ofproto_unixctl_trace(struct unixctl_conn *conn, const char *args_,
3793 void *aux OVS_UNUSED)
3795 char *dpname, *in_port_s, *tun_id_s, *packet_s;
3796 char *args = xstrdup(args_);
3797 char *save_ptr = NULL;
3798 struct ofproto_dpif *ofproto;
3799 struct ofpbuf packet;
3800 struct rule_dpif *rule;
3807 ofpbuf_init(&packet, strlen(args) / 2);
3810 dpname = strtok_r(args, " ", &save_ptr);
3811 tun_id_s = strtok_r(NULL, " ", &save_ptr);
3812 in_port_s = strtok_r(NULL, " ", &save_ptr);
3813 packet_s = strtok_r(NULL, "", &save_ptr); /* Get entire rest of line. */
3814 if (!dpname || !in_port_s || !packet_s) {
3815 unixctl_command_reply(conn, 501, "Bad command syntax");
3819 ofproto = ofproto_dpif_lookup(dpname);
3821 unixctl_command_reply(conn, 501, "Unknown ofproto (use ofproto/list "
3826 tun_id = htonll(strtoull(tun_id_s, NULL, 0));
3827 in_port = ofp_port_to_odp_port(atoi(in_port_s));
3829 packet_s = ofpbuf_put_hex(&packet, packet_s, NULL);
3830 packet_s += strspn(packet_s, " ");
3831 if (*packet_s != '\0') {
3832 unixctl_command_reply(conn, 501, "Trailing garbage in command");
3835 if (packet.size < ETH_HEADER_LEN) {
3836 unixctl_command_reply(conn, 501, "Packet data too short for Ethernet");
3840 ds_put_cstr(&result, "Packet: ");
3841 s = ofp_packet_to_string(packet.data, packet.size, packet.size);
3842 ds_put_cstr(&result, s);
3845 flow_extract(&packet, tun_id, in_port, &flow);
3846 ds_put_cstr(&result, "Flow: ");
3847 flow_format(&result, &flow);
3848 ds_put_char(&result, '\n');
3850 rule = rule_dpif_lookup(ofproto, &flow);
3851 trace_format_rule(&result, 0, &rule->up);
3853 struct ofproto_trace trace;
3854 struct ofpbuf *odp_actions;
3856 trace.result = &result;
3858 action_xlate_ctx_init(&trace.ctx, ofproto, &flow, &packet);
3859 trace.ctx.resubmit_hook = trace_resubmit;
3860 odp_actions = xlate_actions(&trace.ctx,
3861 rule->up.actions, rule->up.n_actions);
3863 ds_put_char(&result, '\n');
3864 trace_format_flow(&result, 0, "Final flow", &trace);
3865 ds_put_cstr(&result, "Datapath actions: ");
3866 format_odp_actions(&result, odp_actions->data, odp_actions->size);
3867 ofpbuf_delete(odp_actions);
3870 unixctl_command_reply(conn, 200, ds_cstr(&result));
3873 ds_destroy(&result);
3874 ofpbuf_uninit(&packet);
3879 ofproto_dpif_unixctl_init(void)
3881 static bool registered;
3887 unixctl_command_register("ofproto/trace", ofproto_unixctl_trace, NULL);
3888 unixctl_command_register("fdb/show", ofproto_unixctl_fdb_show, NULL);
3891 const struct ofproto_class ofproto_dpif_class = {
3918 port_is_lacp_current,
3925 rule_modify_actions,
3938 is_mirror_output_bundle,