2 * Copyright (c) 2009, 2010, 2011 Nicira Networks.
3 * Copyright (c) 2010 Jean Tourrilhes - HP-Labs.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
22 #include <sys/socket.h>
24 #include <netinet/in.h>
27 #include "byte-order.h"
28 #include "classifier.h"
30 #include "discovery.h"
32 #include "dynamic-string.h"
33 #include "fail-open.h"
37 #include "mac-learning.h"
38 #include "multipath.h"
44 #include "ofp-print.h"
46 #include "ofproto-sflow.h"
48 #include "openflow/nicira-ext.h"
49 #include "openflow/openflow.h"
50 #include "openvswitch/datapath-protocol.h"
54 #include "poll-loop.h"
58 #include "stream-ssl.h"
66 VLOG_DEFINE_THIS_MODULE(ofproto);
68 COVERAGE_DEFINE(facet_changed_rule);
69 COVERAGE_DEFINE(facet_revalidate);
70 COVERAGE_DEFINE(odp_overflow);
71 COVERAGE_DEFINE(ofproto_agg_request);
72 COVERAGE_DEFINE(ofproto_costly_flags);
73 COVERAGE_DEFINE(ofproto_ctlr_action);
74 COVERAGE_DEFINE(ofproto_del_rule);
75 COVERAGE_DEFINE(ofproto_error);
76 COVERAGE_DEFINE(ofproto_expiration);
77 COVERAGE_DEFINE(ofproto_expired);
78 COVERAGE_DEFINE(ofproto_flows_req);
79 COVERAGE_DEFINE(ofproto_flush);
80 COVERAGE_DEFINE(ofproto_invalidated);
81 COVERAGE_DEFINE(ofproto_no_packet_in);
82 COVERAGE_DEFINE(ofproto_ofconn_stuck);
83 COVERAGE_DEFINE(ofproto_ofp2odp);
84 COVERAGE_DEFINE(ofproto_packet_in);
85 COVERAGE_DEFINE(ofproto_packet_out);
86 COVERAGE_DEFINE(ofproto_queue_req);
87 COVERAGE_DEFINE(ofproto_recv_openflow);
88 COVERAGE_DEFINE(ofproto_reinit_ports);
89 COVERAGE_DEFINE(ofproto_unexpected_rule);
90 COVERAGE_DEFINE(ofproto_uninstallable);
91 COVERAGE_DEFINE(ofproto_update_port);
93 #include "sflow_api.h"
98 struct hmap_node hmap_node; /* In struct ofproto's "ports" hmap. */
99 struct netdev *netdev;
100 struct ofp_phy_port opp; /* In host byte order. */
104 static void ofport_free(struct ofport *);
105 static void hton_ofp_phy_port(struct ofp_phy_port *);
107 struct action_xlate_ctx {
108 /* action_xlate_ctx_init() initializes these members. */
111 struct ofproto *ofproto;
113 /* Flow to which the OpenFlow actions apply. xlate_actions() will modify
114 * this flow when actions change header fields. */
117 /* The packet corresponding to 'flow', or a null pointer if we are
118 * revalidating without a packet to refer to. */
119 const struct ofpbuf *packet;
121 /* If nonnull, called just before executing a resubmit action.
123 * This is normally null so the client has to set it manually after
124 * calling action_xlate_ctx_init(). */
125 void (*resubmit_hook)(struct action_xlate_ctx *, const struct rule *);
127 /* xlate_actions() initializes and uses these members. The client might want
128 * to look at them after it returns. */
130 struct ofpbuf *odp_actions; /* Datapath actions. */
131 tag_type tags; /* Tags associated with OFPP_NORMAL actions. */
132 bool may_set_up_flow; /* True ordinarily; false if the actions must
133 * be reassessed for every packet. */
134 uint16_t nf_output_iface; /* Output interface index for NetFlow. */
136 /* xlate_actions() initializes and uses these members, but the client has no
137 * reason to look at them. */
139 int recurse; /* Recursion level, via xlate_table_action. */
140 int last_pop_priority; /* Offset in 'odp_actions' just past most
141 * recently added ODPAT_SET_PRIORITY. */
144 static void action_xlate_ctx_init(struct action_xlate_ctx *,
145 struct ofproto *, const struct flow *,
146 const struct ofpbuf *);
147 static struct ofpbuf *xlate_actions(struct action_xlate_ctx *,
148 const union ofp_action *in, size_t n_in);
150 /* An OpenFlow flow. */
152 long long int used; /* Time last used; time created if not used. */
153 long long int created; /* Creation time. */
157 * - Do include packets and bytes from facets that have been deleted or
158 * whose own statistics have been folded into the rule.
160 * - Do include packets and bytes sent "by hand" that were accounted to
161 * the rule without any facet being involved (this is a rare corner
162 * case in rule_execute()).
164 * - Do not include packet or bytes that can be obtained from any facet's
165 * packet_count or byte_count member or that can be obtained from the
166 * datapath by, e.g., dpif_flow_get() for any facet.
168 uint64_t packet_count; /* Number of packets received. */
169 uint64_t byte_count; /* Number of bytes received. */
171 ovs_be64 flow_cookie; /* Controller-issued identifier. */
173 struct cls_rule cr; /* In owning ofproto's classifier. */
174 uint16_t idle_timeout; /* In seconds from time of last use. */
175 uint16_t hard_timeout; /* In seconds from time of creation. */
176 bool send_flow_removed; /* Send a flow removed message? */
177 int n_actions; /* Number of elements in actions[]. */
178 union ofp_action *actions; /* OpenFlow actions. */
179 struct list facets; /* List of "struct facet"s. */
182 static struct rule *rule_from_cls_rule(const struct cls_rule *);
183 static bool rule_is_hidden(const struct rule *);
185 static struct rule *rule_create(const struct cls_rule *,
186 const union ofp_action *, size_t n_actions,
187 uint16_t idle_timeout, uint16_t hard_timeout,
188 ovs_be64 flow_cookie, bool send_flow_removed);
189 static void rule_destroy(struct ofproto *, struct rule *);
190 static void rule_free(struct rule *);
192 static struct rule *rule_lookup(struct ofproto *, const struct flow *);
193 static void rule_insert(struct ofproto *, struct rule *);
194 static void rule_remove(struct ofproto *, struct rule *);
196 static void rule_send_removed(struct ofproto *, struct rule *, uint8_t reason);
198 /* An exact-match instantiation of an OpenFlow flow. */
200 long long int used; /* Time last used; time created if not used. */
204 * - Do include packets and bytes sent "by hand", e.g. with
207 * - Do include packets and bytes that were obtained from the datapath
208 * when a flow was deleted (e.g. dpif_flow_del()) or when its
209 * statistics were reset (e.g. dpif_flow_put() with ODPPF_ZERO_STATS).
211 * - Do not include any packets or bytes that can currently be obtained
212 * from the datapath by, e.g., dpif_flow_get().
214 uint64_t packet_count; /* Number of packets received. */
215 uint64_t byte_count; /* Number of bytes received. */
217 /* Number of bytes passed to account_cb. This may include bytes that can
218 * currently obtained from the datapath (thus, it can be greater than
220 uint64_t accounted_bytes;
222 struct hmap_node hmap_node; /* In owning ofproto's 'facets' hmap. */
223 struct list list_node; /* In owning rule's 'facets' list. */
224 struct rule *rule; /* Owning rule. */
225 struct flow flow; /* Exact-match flow. */
226 bool installed; /* Installed in datapath? */
227 bool may_install; /* True ordinarily; false if actions must
228 * be reassessed for every packet. */
229 size_t actions_len; /* Number of bytes in actions[]. */
230 struct nlattr *actions; /* Datapath actions. */
231 tag_type tags; /* Tags (set only by hooks). */
232 struct netflow_flow nf_flow; /* Per-flow NetFlow tracking data. */
235 static struct facet *facet_create(struct ofproto *, struct rule *,
237 const struct ofpbuf *packet);
238 static void facet_remove(struct ofproto *, struct facet *);
239 static void facet_free(struct facet *);
241 static struct facet *facet_lookup_valid(struct ofproto *, const struct flow *);
242 static bool facet_revalidate(struct ofproto *, struct facet *);
244 static void facet_install(struct ofproto *, struct facet *, bool zero_stats);
245 static void facet_uninstall(struct ofproto *, struct facet *);
246 static void facet_flush_stats(struct ofproto *, struct facet *);
248 static void facet_make_actions(struct ofproto *, struct facet *,
249 const struct ofpbuf *packet);
250 static void facet_update_stats(struct ofproto *, struct facet *,
251 const struct odp_flow_stats *);
253 /* ofproto supports two kinds of OpenFlow connections:
255 * - "Primary" connections to ordinary OpenFlow controllers. ofproto
256 * maintains persistent connections to these controllers and by default
257 * sends them asynchronous messages such as packet-ins.
259 * - "Service" connections, e.g. from ovs-ofctl. When these connections
260 * drop, it is the other side's responsibility to reconnect them if
261 * necessary. ofproto does not send them asynchronous messages by default.
263 * Currently, active (tcp, ssl, unix) connections are always "primary"
264 * connections and passive (ptcp, pssl, punix) connections are always "service"
265 * connections. There is no inherent reason for this, but it reflects the
269 OFCONN_PRIMARY, /* An ordinary OpenFlow controller. */
270 OFCONN_SERVICE /* A service connection, e.g. "ovs-ofctl". */
273 /* A listener for incoming OpenFlow "service" connections. */
275 struct hmap_node node; /* In struct ofproto's "services" hmap. */
276 struct pvconn *pvconn; /* OpenFlow connection listener. */
278 /* These are not used by ofservice directly. They are settings for
279 * accepted "struct ofconn"s from the pvconn. */
280 int probe_interval; /* Max idle time before probing, in seconds. */
281 int rate_limit; /* Max packet-in rate in packets per second. */
282 int burst_limit; /* Limit on accumulating packet credits. */
285 static struct ofservice *ofservice_lookup(struct ofproto *,
287 static int ofservice_create(struct ofproto *,
288 const struct ofproto_controller *);
289 static void ofservice_reconfigure(struct ofservice *,
290 const struct ofproto_controller *);
291 static void ofservice_destroy(struct ofproto *, struct ofservice *);
293 /* An OpenFlow connection. */
295 struct ofproto *ofproto; /* The ofproto that owns this connection. */
296 struct list node; /* In struct ofproto's "all_conns" list. */
297 struct rconn *rconn; /* OpenFlow connection. */
298 enum ofconn_type type; /* Type. */
299 enum nx_flow_format flow_format; /* Currently selected flow format. */
301 /* OFPT_PACKET_IN related data. */
302 struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */
303 struct pinsched *schedulers[2]; /* Indexed by reason code; see below. */
304 struct pktbuf *pktbuf; /* OpenFlow packet buffers. */
305 int miss_send_len; /* Bytes to send of buffered packets. */
307 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
308 * requests, and the maximum number before we stop reading OpenFlow
310 #define OFCONN_REPLY_MAX 100
311 struct rconn_packet_counter *reply_counter;
313 /* type == OFCONN_PRIMARY only. */
314 enum nx_role role; /* Role. */
315 struct hmap_node hmap_node; /* In struct ofproto's "controllers" map. */
316 struct discovery *discovery; /* Controller discovery object, if enabled. */
317 struct status_category *ss; /* Switch status category. */
318 enum ofproto_band band; /* In-band or out-of-band? */
321 /* We use OFPR_NO_MATCH and OFPR_ACTION as indexes into struct ofconn's
322 * "schedulers" array. Their values are 0 and 1, and their meanings and values
323 * coincide with _ODPL_MISS_NR and _ODPL_ACTION_NR, so this is convenient. In
324 * case anything ever changes, check their values here. */
325 #define N_SCHEDULERS 2
326 BUILD_ASSERT_DECL(OFPR_NO_MATCH == 0);
327 BUILD_ASSERT_DECL(OFPR_NO_MATCH == _ODPL_MISS_NR);
328 BUILD_ASSERT_DECL(OFPR_ACTION == 1);
329 BUILD_ASSERT_DECL(OFPR_ACTION == _ODPL_ACTION_NR);
331 static struct ofconn *ofconn_create(struct ofproto *, struct rconn *,
333 static void ofconn_destroy(struct ofconn *);
334 static void ofconn_run(struct ofconn *);
335 static void ofconn_wait(struct ofconn *);
336 static bool ofconn_receives_async_msgs(const struct ofconn *);
337 static char *ofconn_make_name(const struct ofproto *, const char *target);
338 static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst);
340 static void queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
341 struct rconn_packet_counter *counter);
343 static void send_packet_in(struct ofproto *, struct dpif_upcall *,
344 const struct flow *, bool clone);
345 static void do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn);
349 uint64_t datapath_id; /* Datapath ID. */
350 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
351 char *mfr_desc; /* Manufacturer. */
352 char *hw_desc; /* Hardware. */
353 char *sw_desc; /* Software version. */
354 char *serial_desc; /* Serial number. */
355 char *dp_desc; /* Datapath description. */
359 struct netdev_monitor *netdev_monitor;
360 struct hmap ports; /* Contains "struct ofport"s. */
361 struct shash port_by_name;
365 struct switch_status *switch_status;
366 struct fail_open *fail_open;
367 struct netflow *netflow;
368 struct ofproto_sflow *sflow;
370 /* In-band control. */
371 struct in_band *in_band;
372 long long int next_in_band_update;
373 struct sockaddr_in *extra_in_band_remotes;
374 size_t n_extra_remotes;
378 struct classifier cls;
379 long long int next_expiration;
383 bool need_revalidate;
384 struct tag_set revalidate_set;
386 /* OpenFlow connections. */
387 struct hmap controllers; /* Controller "struct ofconn"s. */
388 struct list all_conns; /* Contains "struct ofconn"s. */
389 enum ofproto_fail_mode fail_mode;
391 /* OpenFlow listeners. */
392 struct hmap services; /* Contains "struct ofservice"s. */
393 struct pvconn **snoops;
396 /* Hooks for ovs-vswitchd. */
397 const struct ofhooks *ofhooks;
400 /* Used by default ofhooks. */
401 struct mac_learning *ml;
404 /* Map from dpif name to struct ofproto, for use by unixctl commands. */
405 static struct shash all_ofprotos = SHASH_INITIALIZER(&all_ofprotos);
407 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
409 static const struct ofhooks default_ofhooks;
411 static uint64_t pick_datapath_id(const struct ofproto *);
412 static uint64_t pick_fallback_dpid(void);
414 static int ofproto_expire(struct ofproto *);
416 static void handle_upcall(struct ofproto *, struct dpif_upcall *);
418 static void handle_openflow(struct ofconn *, struct ofpbuf *);
420 static struct ofport *get_port(const struct ofproto *, uint16_t odp_port);
421 static void update_port(struct ofproto *, const char *devname);
422 static int init_ports(struct ofproto *);
423 static void reinit_ports(struct ofproto *);
425 static void ofproto_unixctl_init(void);
428 ofproto_create(const char *datapath, const char *datapath_type,
429 const struct ofhooks *ofhooks, void *aux,
430 struct ofproto **ofprotop)
432 struct odp_stats stats;
439 ofproto_unixctl_init();
441 /* Connect to datapath and start listening for messages. */
442 error = dpif_open(datapath, datapath_type, &dpif);
444 VLOG_ERR("failed to open datapath %s: %s", datapath, strerror(error));
447 error = dpif_get_dp_stats(dpif, &stats);
449 VLOG_ERR("failed to obtain stats for datapath %s: %s",
450 datapath, strerror(error));
454 error = dpif_recv_set_mask(dpif, ODPL_MISS | ODPL_ACTION | ODPL_SFLOW);
456 VLOG_ERR("failed to listen on datapath %s: %s",
457 datapath, strerror(error));
461 dpif_flow_flush(dpif);
462 dpif_recv_purge(dpif);
464 /* Initialize settings. */
465 p = xzalloc(sizeof *p);
466 p->fallback_dpid = pick_fallback_dpid();
467 p->datapath_id = p->fallback_dpid;
468 p->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
469 p->hw_desc = xstrdup(DEFAULT_HW_DESC);
470 p->sw_desc = xstrdup(DEFAULT_SW_DESC);
471 p->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
472 p->dp_desc = xstrdup(DEFAULT_DP_DESC);
474 /* Initialize datapath. */
476 p->netdev_monitor = netdev_monitor_create();
477 hmap_init(&p->ports);
478 shash_init(&p->port_by_name);
479 p->max_ports = stats.max_ports;
481 /* Initialize submodules. */
482 p->switch_status = switch_status_create(p);
487 /* Initialize in-band control. */
489 p->in_band_queue = -1;
491 /* Initialize flow table. */
492 classifier_init(&p->cls);
493 p->next_expiration = time_msec() + 1000;
495 /* Initialize facet table. */
496 hmap_init(&p->facets);
497 p->need_revalidate = false;
498 tag_set_init(&p->revalidate_set);
500 /* Initialize OpenFlow connections. */
501 list_init(&p->all_conns);
502 hmap_init(&p->controllers);
503 hmap_init(&p->services);
507 /* Initialize hooks. */
509 p->ofhooks = ofhooks;
513 p->ofhooks = &default_ofhooks;
515 p->ml = mac_learning_create();
518 /* Pick final datapath ID. */
519 p->datapath_id = pick_datapath_id(p);
520 VLOG_INFO("using datapath ID %016"PRIx64, p->datapath_id);
522 shash_add_once(&all_ofprotos, dpif_name(p->dpif), p);
529 ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id)
531 uint64_t old_dpid = p->datapath_id;
532 p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p);
533 if (p->datapath_id != old_dpid) {
534 VLOG_INFO("datapath ID changed to %016"PRIx64, p->datapath_id);
536 /* Force all active connections to reconnect, since there is no way to
537 * notify a controller that the datapath ID has changed. */
538 ofproto_reconnect_controllers(p);
543 is_discovery_controller(const struct ofproto_controller *c)
545 return !strcmp(c->target, "discover");
549 is_in_band_controller(const struct ofproto_controller *c)
551 return is_discovery_controller(c) || c->band == OFPROTO_IN_BAND;
554 /* Creates a new controller in 'ofproto'. Some of the settings are initially
555 * drawn from 'c', but update_controller() needs to be called later to finish
556 * the new ofconn's configuration. */
558 add_controller(struct ofproto *ofproto, const struct ofproto_controller *c)
560 struct discovery *discovery;
561 struct ofconn *ofconn;
563 if (is_discovery_controller(c)) {
564 int error = discovery_create(c->accept_re, c->update_resolv_conf,
565 ofproto->dpif, ofproto->switch_status,
574 ofconn = ofconn_create(ofproto, rconn_create(5, 8), OFCONN_PRIMARY);
575 ofconn->pktbuf = pktbuf_create();
576 ofconn->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN;
578 ofconn->discovery = discovery;
580 char *name = ofconn_make_name(ofproto, c->target);
581 rconn_connect(ofconn->rconn, c->target, name);
584 hmap_insert(&ofproto->controllers, &ofconn->hmap_node,
585 hash_string(c->target, 0));
588 /* Reconfigures 'ofconn' to match 'c'. This function cannot update an ofconn's
589 * target or turn discovery on or off (these are done by creating new ofconns
590 * and deleting old ones), but it can update the rest of an ofconn's
593 update_controller(struct ofconn *ofconn, const struct ofproto_controller *c)
597 ofconn->band = (is_in_band_controller(c)
598 ? OFPROTO_IN_BAND : OFPROTO_OUT_OF_BAND);
600 rconn_set_max_backoff(ofconn->rconn, c->max_backoff);
602 probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0;
603 rconn_set_probe_interval(ofconn->rconn, probe_interval);
605 if (ofconn->discovery) {
606 discovery_set_update_resolv_conf(ofconn->discovery,
607 c->update_resolv_conf);
608 discovery_set_accept_controller_re(ofconn->discovery, c->accept_re);
611 ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
615 ofconn_get_target(const struct ofconn *ofconn)
617 return ofconn->discovery ? "discover" : rconn_get_target(ofconn->rconn);
620 static struct ofconn *
621 find_controller_by_target(struct ofproto *ofproto, const char *target)
623 struct ofconn *ofconn;
625 HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node,
626 hash_string(target, 0), &ofproto->controllers) {
627 if (!strcmp(ofconn_get_target(ofconn), target)) {
635 update_in_band_remotes(struct ofproto *ofproto)
637 const struct ofconn *ofconn;
638 struct sockaddr_in *addrs;
639 size_t max_addrs, n_addrs;
643 /* Allocate enough memory for as many remotes as we could possibly have. */
644 max_addrs = ofproto->n_extra_remotes + hmap_count(&ofproto->controllers);
645 addrs = xmalloc(max_addrs * sizeof *addrs);
648 /* Add all the remotes. */
650 HMAP_FOR_EACH (ofconn, hmap_node, &ofproto->controllers) {
651 struct sockaddr_in *sin = &addrs[n_addrs];
653 if (ofconn->band == OFPROTO_OUT_OF_BAND) {
657 sin->sin_addr.s_addr = rconn_get_remote_ip(ofconn->rconn);
658 if (sin->sin_addr.s_addr) {
659 sin->sin_port = rconn_get_remote_port(ofconn->rconn);
662 if (ofconn->discovery) {
666 for (i = 0; i < ofproto->n_extra_remotes; i++) {
667 addrs[n_addrs++] = ofproto->extra_in_band_remotes[i];
670 /* Create or update or destroy in-band.
672 * Ordinarily we only enable in-band if there's at least one remote
673 * address, but discovery needs the in-band rules for DHCP to be installed
674 * even before we know any remote addresses. */
675 if (n_addrs || discovery) {
676 if (!ofproto->in_band) {
677 in_band_create(ofproto, ofproto->dpif, ofproto->switch_status,
680 if (ofproto->in_band) {
681 in_band_set_remotes(ofproto->in_band, addrs, n_addrs);
683 in_band_set_queue(ofproto->in_band, ofproto->in_band_queue);
684 ofproto->next_in_band_update = time_msec() + 1000;
686 in_band_destroy(ofproto->in_band);
687 ofproto->in_band = NULL;
695 update_fail_open(struct ofproto *p)
697 struct ofconn *ofconn;
699 if (!hmap_is_empty(&p->controllers)
700 && p->fail_mode == OFPROTO_FAIL_STANDALONE) {
701 struct rconn **rconns;
705 p->fail_open = fail_open_create(p, p->switch_status);
709 rconns = xmalloc(hmap_count(&p->controllers) * sizeof *rconns);
710 HMAP_FOR_EACH (ofconn, hmap_node, &p->controllers) {
711 rconns[n++] = ofconn->rconn;
714 fail_open_set_controllers(p->fail_open, rconns, n);
715 /* p->fail_open takes ownership of 'rconns'. */
717 fail_open_destroy(p->fail_open);
723 ofproto_set_controllers(struct ofproto *p,
724 const struct ofproto_controller *controllers,
725 size_t n_controllers)
727 struct shash new_controllers;
728 struct ofconn *ofconn, *next_ofconn;
729 struct ofservice *ofservice, *next_ofservice;
733 /* Create newly configured controllers and services.
734 * Create a name to ofproto_controller mapping in 'new_controllers'. */
735 shash_init(&new_controllers);
736 for (i = 0; i < n_controllers; i++) {
737 const struct ofproto_controller *c = &controllers[i];
739 if (!vconn_verify_name(c->target) || !strcmp(c->target, "discover")) {
740 if (!find_controller_by_target(p, c->target)) {
741 add_controller(p, c);
743 } else if (!pvconn_verify_name(c->target)) {
744 if (!ofservice_lookup(p, c->target) && ofservice_create(p, c)) {
748 VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"",
749 dpif_name(p->dpif), c->target);
753 shash_add_once(&new_controllers, c->target, &controllers[i]);
756 /* Delete controllers that are no longer configured.
757 * Update configuration of all now-existing controllers. */
759 HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &p->controllers) {
760 struct ofproto_controller *c;
762 c = shash_find_data(&new_controllers, ofconn_get_target(ofconn));
764 ofconn_destroy(ofconn);
766 update_controller(ofconn, c);
773 /* Delete services that are no longer configured.
774 * Update configuration of all now-existing services. */
775 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) {
776 struct ofproto_controller *c;
778 c = shash_find_data(&new_controllers,
779 pvconn_get_name(ofservice->pvconn));
781 ofservice_destroy(p, ofservice);
783 ofservice_reconfigure(ofservice, c);
787 shash_destroy(&new_controllers);
789 update_in_band_remotes(p);
792 if (!hmap_is_empty(&p->controllers) && !ss_exists) {
793 ofconn = CONTAINER_OF(hmap_first(&p->controllers),
794 struct ofconn, hmap_node);
795 ofconn->ss = switch_status_register(p->switch_status, "remote",
796 rconn_status_cb, ofconn->rconn);
801 ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode)
803 p->fail_mode = fail_mode;
807 /* Drops the connections between 'ofproto' and all of its controllers, forcing
808 * them to reconnect. */
810 ofproto_reconnect_controllers(struct ofproto *ofproto)
812 struct ofconn *ofconn;
814 LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
815 rconn_reconnect(ofconn->rconn);
820 any_extras_changed(const struct ofproto *ofproto,
821 const struct sockaddr_in *extras, size_t n)
825 if (n != ofproto->n_extra_remotes) {
829 for (i = 0; i < n; i++) {
830 const struct sockaddr_in *old = &ofproto->extra_in_band_remotes[i];
831 const struct sockaddr_in *new = &extras[i];
833 if (old->sin_addr.s_addr != new->sin_addr.s_addr ||
834 old->sin_port != new->sin_port) {
842 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s
843 * in-band control should guarantee access, in the same way that in-band
844 * control guarantees access to OpenFlow controllers. */
846 ofproto_set_extra_in_band_remotes(struct ofproto *ofproto,
847 const struct sockaddr_in *extras, size_t n)
849 if (!any_extras_changed(ofproto, extras, n)) {
853 free(ofproto->extra_in_band_remotes);
854 ofproto->n_extra_remotes = n;
855 ofproto->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras);
857 update_in_band_remotes(ofproto);
860 /* Sets the OpenFlow queue used by flows set up by in-band control on
861 * 'ofproto' to 'queue_id'. If 'queue_id' is negative, then in-band control
862 * flows will use the default queue. */
864 ofproto_set_in_band_queue(struct ofproto *ofproto, int queue_id)
866 if (queue_id != ofproto->in_band_queue) {
867 ofproto->in_band_queue = queue_id;
868 update_in_band_remotes(ofproto);
873 ofproto_set_desc(struct ofproto *p,
874 const char *mfr_desc, const char *hw_desc,
875 const char *sw_desc, const char *serial_desc,
878 struct ofp_desc_stats *ods;
881 if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
882 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
883 sizeof ods->mfr_desc);
886 p->mfr_desc = xstrdup(mfr_desc);
889 if (strlen(hw_desc) >= sizeof ods->hw_desc) {
890 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
891 sizeof ods->hw_desc);
894 p->hw_desc = xstrdup(hw_desc);
897 if (strlen(sw_desc) >= sizeof ods->sw_desc) {
898 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
899 sizeof ods->sw_desc);
902 p->sw_desc = xstrdup(sw_desc);
905 if (strlen(serial_desc) >= sizeof ods->serial_num) {
906 VLOG_WARN("truncating serial_desc, must be less than %zu "
908 sizeof ods->serial_num);
910 free(p->serial_desc);
911 p->serial_desc = xstrdup(serial_desc);
914 if (strlen(dp_desc) >= sizeof ods->dp_desc) {
915 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
916 sizeof ods->dp_desc);
919 p->dp_desc = xstrdup(dp_desc);
924 set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
925 const struct svec *svec)
927 struct pvconn **pvconns = *pvconnsp;
928 size_t n_pvconns = *n_pvconnsp;
932 for (i = 0; i < n_pvconns; i++) {
933 pvconn_close(pvconns[i]);
937 pvconns = xmalloc(svec->n * sizeof *pvconns);
939 for (i = 0; i < svec->n; i++) {
940 const char *name = svec->names[i];
941 struct pvconn *pvconn;
944 error = pvconn_open(name, &pvconn);
946 pvconns[n_pvconns++] = pvconn;
948 VLOG_ERR("failed to listen on %s: %s", name, strerror(error));
956 *n_pvconnsp = n_pvconns;
962 ofproto_set_snoops(struct ofproto *ofproto, const struct svec *snoops)
964 return set_pvconns(&ofproto->snoops, &ofproto->n_snoops, snoops);
968 ofproto_set_netflow(struct ofproto *ofproto,
969 const struct netflow_options *nf_options)
971 if (nf_options && nf_options->collectors.n) {
972 if (!ofproto->netflow) {
973 ofproto->netflow = netflow_create();
975 return netflow_set_options(ofproto->netflow, nf_options);
977 netflow_destroy(ofproto->netflow);
978 ofproto->netflow = NULL;
984 ofproto_set_sflow(struct ofproto *ofproto,
985 const struct ofproto_sflow_options *oso)
987 struct ofproto_sflow *os = ofproto->sflow;
990 struct ofport *ofport;
992 os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
993 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
994 ofproto_sflow_add_port(os, ofport->odp_port,
995 netdev_get_name(ofport->netdev));
998 ofproto_sflow_set_options(os, oso);
1000 ofproto_sflow_destroy(os);
1001 ofproto->sflow = NULL;
1006 ofproto_get_datapath_id(const struct ofproto *ofproto)
1008 return ofproto->datapath_id;
1012 ofproto_has_primary_controller(const struct ofproto *ofproto)
1014 return !hmap_is_empty(&ofproto->controllers);
1017 enum ofproto_fail_mode
1018 ofproto_get_fail_mode(const struct ofproto *p)
1020 return p->fail_mode;
1024 ofproto_get_snoops(const struct ofproto *ofproto, struct svec *snoops)
1028 for (i = 0; i < ofproto->n_snoops; i++) {
1029 svec_add(snoops, pvconn_get_name(ofproto->snoops[i]));
1034 ofproto_destroy(struct ofproto *p)
1036 struct ofservice *ofservice, *next_ofservice;
1037 struct ofconn *ofconn, *next_ofconn;
1038 struct ofport *ofport, *next_ofport;
1045 shash_find_and_delete(&all_ofprotos, dpif_name(p->dpif));
1047 /* Destroy fail-open and in-band early, since they touch the classifier. */
1048 fail_open_destroy(p->fail_open);
1049 p->fail_open = NULL;
1051 in_band_destroy(p->in_band);
1053 free(p->extra_in_band_remotes);
1055 ofproto_flush_flows(p);
1056 classifier_destroy(&p->cls);
1057 hmap_destroy(&p->facets);
1059 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) {
1060 ofconn_destroy(ofconn);
1062 hmap_destroy(&p->controllers);
1064 dpif_close(p->dpif);
1065 netdev_monitor_destroy(p->netdev_monitor);
1066 HMAP_FOR_EACH_SAFE (ofport, next_ofport, hmap_node, &p->ports) {
1067 hmap_remove(&p->ports, &ofport->hmap_node);
1068 ofport_free(ofport);
1070 shash_destroy(&p->port_by_name);
1072 switch_status_destroy(p->switch_status);
1073 netflow_destroy(p->netflow);
1074 ofproto_sflow_destroy(p->sflow);
1076 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) {
1077 ofservice_destroy(p, ofservice);
1079 hmap_destroy(&p->services);
1081 for (i = 0; i < p->n_snoops; i++) {
1082 pvconn_close(p->snoops[i]);
1086 mac_learning_destroy(p->ml);
1091 free(p->serial_desc);
1094 hmap_destroy(&p->ports);
1100 ofproto_run(struct ofproto *p)
1102 int error = ofproto_run1(p);
1104 error = ofproto_run2(p, false);
1110 process_port_change(struct ofproto *ofproto, int error, char *devname)
1112 if (error == ENOBUFS) {
1113 reinit_ports(ofproto);
1114 } else if (!error) {
1115 update_port(ofproto, devname);
1120 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
1121 * means that 'ofconn' is more interesting for monitoring than a lower return
1124 snoop_preference(const struct ofconn *ofconn)
1126 switch (ofconn->role) {
1127 case NX_ROLE_MASTER:
1134 /* Shouldn't happen. */
1139 /* One of ofproto's "snoop" pvconns has accepted a new connection on 'vconn'.
1140 * Connects this vconn to a controller. */
1142 add_snooper(struct ofproto *ofproto, struct vconn *vconn)
1144 struct ofconn *ofconn, *best;
1146 /* Pick a controller for monitoring. */
1148 LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
1149 if (ofconn->type == OFCONN_PRIMARY
1150 && (!best || snoop_preference(ofconn) > snoop_preference(best))) {
1156 rconn_add_monitor(best->rconn, vconn);
1158 VLOG_INFO_RL(&rl, "no controller connection to snoop");
1164 ofproto_run1(struct ofproto *p)
1166 struct ofconn *ofconn, *next_ofconn;
1167 struct ofservice *ofservice;
1172 if (shash_is_empty(&p->port_by_name)) {
1176 for (i = 0; i < 50; i++) {
1177 struct dpif_upcall packet;
1179 error = dpif_recv(p->dpif, &packet);
1181 if (error == ENODEV) {
1182 /* Someone destroyed the datapath behind our back. The caller
1183 * better destroy us and give up, because we're just going to
1184 * spin from here on out. */
1185 static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5);
1186 VLOG_ERR_RL(&rl2, "%s: datapath was destroyed externally",
1187 dpif_name(p->dpif));
1193 handle_upcall(p, &packet);
1196 while ((error = dpif_port_poll(p->dpif, &devname)) != EAGAIN) {
1197 process_port_change(p, error, devname);
1199 while ((error = netdev_monitor_poll(p->netdev_monitor,
1200 &devname)) != EAGAIN) {
1201 process_port_change(p, error, devname);
1205 if (time_msec() >= p->next_in_band_update) {
1206 update_in_band_remotes(p);
1208 in_band_run(p->in_band);
1211 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) {
1215 /* Fail-open maintenance. Do this after processing the ofconns since
1216 * fail-open checks the status of the controller rconn. */
1218 fail_open_run(p->fail_open);
1221 HMAP_FOR_EACH (ofservice, node, &p->services) {
1222 struct vconn *vconn;
1225 retval = pvconn_accept(ofservice->pvconn, OFP_VERSION, &vconn);
1227 struct rconn *rconn;
1230 rconn = rconn_create(ofservice->probe_interval, 0);
1231 name = ofconn_make_name(p, vconn_get_name(vconn));
1232 rconn_connect_unreliably(rconn, vconn, name);
1235 ofconn = ofconn_create(p, rconn, OFCONN_SERVICE);
1236 ofconn_set_rate_limit(ofconn, ofservice->rate_limit,
1237 ofservice->burst_limit);
1238 } else if (retval != EAGAIN) {
1239 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
1243 for (i = 0; i < p->n_snoops; i++) {
1244 struct vconn *vconn;
1247 retval = pvconn_accept(p->snoops[i], OFP_VERSION, &vconn);
1249 add_snooper(p, vconn);
1250 } else if (retval != EAGAIN) {
1251 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
1255 if (time_msec() >= p->next_expiration) {
1256 int delay = ofproto_expire(p);
1257 p->next_expiration = time_msec() + delay;
1258 COVERAGE_INC(ofproto_expiration);
1262 netflow_run(p->netflow);
1265 ofproto_sflow_run(p->sflow);
1272 ofproto_run2(struct ofproto *p, bool revalidate_all)
1274 /* Figure out what we need to revalidate now, if anything. */
1275 struct tag_set revalidate_set = p->revalidate_set;
1276 if (p->need_revalidate) {
1277 revalidate_all = true;
1280 /* Clear the revalidation flags. */
1281 tag_set_init(&p->revalidate_set);
1282 p->need_revalidate = false;
1284 /* Now revalidate if there's anything to do. */
1285 if (revalidate_all || !tag_set_is_empty(&revalidate_set)) {
1286 struct facet *facet, *next;
1288 HMAP_FOR_EACH_SAFE (facet, next, hmap_node, &p->facets) {
1290 || tag_set_intersects(&revalidate_set, facet->tags)) {
1291 facet_revalidate(p, facet);
1300 ofproto_wait(struct ofproto *p)
1302 struct ofservice *ofservice;
1303 struct ofconn *ofconn;
1306 dpif_recv_wait(p->dpif);
1307 dpif_port_poll_wait(p->dpif);
1308 netdev_monitor_poll_wait(p->netdev_monitor);
1309 LIST_FOR_EACH (ofconn, node, &p->all_conns) {
1310 ofconn_wait(ofconn);
1313 poll_timer_wait_until(p->next_in_band_update);
1314 in_band_wait(p->in_band);
1317 fail_open_wait(p->fail_open);
1320 ofproto_sflow_wait(p->sflow);
1322 if (!tag_set_is_empty(&p->revalidate_set)) {
1323 poll_immediate_wake();
1325 if (p->need_revalidate) {
1326 /* Shouldn't happen, but if it does just go around again. */
1327 VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
1328 poll_immediate_wake();
1329 } else if (p->next_expiration != LLONG_MAX) {
1330 poll_timer_wait_until(p->next_expiration);
1332 HMAP_FOR_EACH (ofservice, node, &p->services) {
1333 pvconn_wait(ofservice->pvconn);
1335 for (i = 0; i < p->n_snoops; i++) {
1336 pvconn_wait(p->snoops[i]);
1341 ofproto_revalidate(struct ofproto *ofproto, tag_type tag)
1343 tag_set_add(&ofproto->revalidate_set, tag);
1347 ofproto_get_revalidate_set(struct ofproto *ofproto)
1349 return &ofproto->revalidate_set;
1353 ofproto_is_alive(const struct ofproto *p)
1355 return !hmap_is_empty(&p->controllers);
1359 ofproto_get_ofproto_controller_info(const struct ofproto * ofproto,
1362 const struct ofconn *ofconn;
1366 HMAP_FOR_EACH (ofconn, hmap_node, &ofproto->controllers) {
1367 const struct rconn *rconn = ofconn->rconn;
1368 const int last_error = rconn_get_last_error(rconn);
1369 struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo);
1371 shash_add(info, rconn_get_target(rconn), cinfo);
1373 cinfo->is_connected = rconn_is_connected(rconn);
1374 cinfo->role = ofconn->role;
1378 if (last_error == EOF) {
1379 cinfo->pairs.keys[cinfo->pairs.n] = "last_error";
1380 cinfo->pairs.values[cinfo->pairs.n++] = xstrdup("End of file");
1381 } else if (last_error > 0) {
1382 cinfo->pairs.keys[cinfo->pairs.n] = "last_error";
1383 cinfo->pairs.values[cinfo->pairs.n++] =
1384 xstrdup(strerror(last_error));
1387 cinfo->pairs.keys[cinfo->pairs.n] = "state";
1388 cinfo->pairs.values[cinfo->pairs.n++] =
1389 xstrdup(rconn_get_state(rconn));
1391 cinfo->pairs.keys[cinfo->pairs.n] = "time_in_state";
1392 cinfo->pairs.values[cinfo->pairs.n++] =
1393 xasprintf("%u", rconn_get_state_elapsed(rconn));
1398 ofproto_free_ofproto_controller_info(struct shash *info)
1400 struct shash_node *node;
1402 SHASH_FOR_EACH (node, info) {
1403 struct ofproto_controller_info *cinfo = node->data;
1404 while (cinfo->pairs.n) {
1405 free((char *) cinfo->pairs.values[--cinfo->pairs.n]);
1409 shash_destroy(info);
1412 /* Deletes port number 'odp_port' from the datapath for 'ofproto'.
1414 * This is almost the same as calling dpif_port_del() directly on the
1415 * datapath, but it also makes 'ofproto' close its open netdev for the port
1416 * (if any). This makes it possible to create a new netdev of a different
1417 * type under the same name, which otherwise the netdev library would refuse
1418 * to do because of the conflict. (The netdev would eventually get closed on
1419 * the next trip through ofproto_run(), but this interface is more direct.)
1421 * Returns 0 if successful, otherwise a positive errno. */
1423 ofproto_port_del(struct ofproto *ofproto, uint16_t odp_port)
1425 struct ofport *ofport = get_port(ofproto, odp_port);
1426 const char *name = ofport ? ofport->opp.name : "<unknown>";
1429 error = dpif_port_del(ofproto->dpif, odp_port);
1431 VLOG_ERR("%s: failed to remove port %"PRIu16" (%s) interface (%s)",
1432 dpif_name(ofproto->dpif), odp_port, name, strerror(error));
1433 } else if (ofport) {
1434 /* 'name' is ofport->opp.name and update_port() is going to destroy
1435 * 'ofport'. Just in case update_port() refers to 'name' after it
1436 * destroys 'ofport', make a copy of it around the update_port()
1438 char *devname = xstrdup(name);
1439 update_port(ofproto, devname);
1445 /* Checks if 'ofproto' thinks 'odp_port' should be included in floods. Returns
1446 * true if 'odp_port' exists and should be included, false otherwise. */
1448 ofproto_port_is_floodable(struct ofproto *ofproto, uint16_t odp_port)
1450 struct ofport *ofport = get_port(ofproto, odp_port);
1451 return ofport && !(ofport->opp.config & OFPPC_NO_FLOOD);
1455 ofproto_send_packet(struct ofproto *p, const struct flow *flow,
1456 const union ofp_action *actions, size_t n_actions,
1457 const struct ofpbuf *packet)
1459 struct action_xlate_ctx ctx;
1460 struct ofpbuf *odp_actions;
1462 action_xlate_ctx_init(&ctx, p, flow, packet);
1463 odp_actions = xlate_actions(&ctx, actions, n_actions);
1465 /* XXX Should we translate the dpif_execute() errno value into an OpenFlow
1467 dpif_execute(p->dpif, odp_actions->data, odp_actions->size, packet);
1469 ofpbuf_delete(odp_actions);
1474 /* Adds a flow to the OpenFlow flow table in 'p' that matches 'cls_rule' and
1475 * performs the 'n_actions' actions in 'actions'. The new flow will not
1478 * If cls_rule->priority is in the range of priorities supported by OpenFlow
1479 * (0...65535, inclusive) then the flow will be visible to OpenFlow
1480 * controllers; otherwise, it will be hidden.
1482 * The caller retains ownership of 'cls_rule' and 'actions'. */
1484 ofproto_add_flow(struct ofproto *p, const struct cls_rule *cls_rule,
1485 const union ofp_action *actions, size_t n_actions)
1488 rule = rule_create(cls_rule, actions, n_actions, 0, 0, 0, false);
1489 rule_insert(p, rule);
1493 ofproto_delete_flow(struct ofproto *ofproto, const struct cls_rule *target)
1497 rule = rule_from_cls_rule(classifier_find_rule_exactly(&ofproto->cls,
1500 rule_remove(ofproto, rule);
1505 ofproto_flush_flows(struct ofproto *ofproto)
1507 struct facet *facet, *next_facet;
1508 struct rule *rule, *next_rule;
1509 struct cls_cursor cursor;
1511 COVERAGE_INC(ofproto_flush);
1513 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
1514 /* Mark the facet as not installed so that facet_remove() doesn't
1515 * bother trying to uninstall it. There is no point in uninstalling it
1516 * individually since we are about to blow away all the facets with
1517 * dpif_flow_flush(). */
1518 facet->installed = false;
1519 facet_remove(ofproto, facet);
1522 cls_cursor_init(&cursor, &ofproto->cls, NULL);
1523 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
1524 rule_remove(ofproto, rule);
1527 dpif_flow_flush(ofproto->dpif);
1528 if (ofproto->in_band) {
1529 in_band_flushed(ofproto->in_band);
1531 if (ofproto->fail_open) {
1532 fail_open_flushed(ofproto->fail_open);
1537 reinit_ports(struct ofproto *p)
1539 struct shash_node *node;
1540 struct shash devnames;
1541 struct ofport *ofport;
1542 struct odp_port *odp_ports;
1546 COVERAGE_INC(ofproto_reinit_ports);
1548 shash_init(&devnames);
1549 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
1550 shash_add_once (&devnames, ofport->opp.name, NULL);
1552 dpif_port_list(p->dpif, &odp_ports, &n_odp_ports);
1553 for (i = 0; i < n_odp_ports; i++) {
1554 shash_add_once (&devnames, odp_ports[i].devname, NULL);
1558 SHASH_FOR_EACH (node, &devnames) {
1559 update_port(p, node->name);
1561 shash_destroy(&devnames);
1564 static struct ofport *
1565 make_ofport(const struct odp_port *odp_port)
1567 struct netdev_options netdev_options;
1568 enum netdev_flags flags;
1569 struct ofport *ofport;
1570 struct netdev *netdev;
1573 memset(&netdev_options, 0, sizeof netdev_options);
1574 netdev_options.name = odp_port->devname;
1575 netdev_options.type = odp_port->type;
1576 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
1578 error = netdev_open(&netdev_options, &netdev);
1580 VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
1581 "cannot be opened (%s)",
1582 odp_port->devname, odp_port->port,
1583 odp_port->devname, strerror(error));
1587 ofport = xmalloc(sizeof *ofport);
1588 ofport->netdev = netdev;
1589 ofport->odp_port = odp_port->port;
1590 ofport->opp.port_no = odp_port_to_ofp_port(odp_port->port);
1591 netdev_get_etheraddr(netdev, ofport->opp.hw_addr);
1592 memcpy(ofport->opp.name, odp_port->devname,
1593 MIN(sizeof ofport->opp.name, sizeof odp_port->devname));
1594 ofport->opp.name[sizeof ofport->opp.name - 1] = '\0';
1596 netdev_get_flags(netdev, &flags);
1597 ofport->opp.config = flags & NETDEV_UP ? 0 : OFPPC_PORT_DOWN;
1599 ofport->opp.state = netdev_get_carrier(netdev) ? 0 : OFPPS_LINK_DOWN;
1601 netdev_get_features(netdev,
1602 &ofport->opp.curr, &ofport->opp.advertised,
1603 &ofport->opp.supported, &ofport->opp.peer);
1608 ofport_conflicts(const struct ofproto *p, const struct odp_port *odp_port)
1610 if (get_port(p, odp_port->port)) {
1611 VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
1614 } else if (shash_find(&p->port_by_name, odp_port->devname)) {
1615 VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
1624 ofport_equal(const struct ofport *a_, const struct ofport *b_)
1626 const struct ofp_phy_port *a = &a_->opp;
1627 const struct ofp_phy_port *b = &b_->opp;
1629 BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
1630 return (a->port_no == b->port_no
1631 && !memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
1632 && !strcmp(a->name, b->name)
1633 && a->state == b->state
1634 && a->config == b->config
1635 && a->curr == b->curr
1636 && a->advertised == b->advertised
1637 && a->supported == b->supported
1638 && a->peer == b->peer);
1642 send_port_status(struct ofproto *p, const struct ofport *ofport,
1645 /* XXX Should limit the number of queued port status change messages. */
1646 struct ofconn *ofconn;
1647 LIST_FOR_EACH (ofconn, node, &p->all_conns) {
1648 struct ofp_port_status *ops;
1651 /* Primary controllers, even slaves, should always get port status
1652 updates. Otherwise obey ofconn_receives_async_msgs(). */
1653 if (ofconn->type != OFCONN_PRIMARY
1654 && !ofconn_receives_async_msgs(ofconn)) {
1658 ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b);
1659 ops->reason = reason;
1660 ops->desc = ofport->opp;
1661 hton_ofp_phy_port(&ops->desc);
1662 queue_tx(b, ofconn, NULL);
1667 ofport_install(struct ofproto *p, struct ofport *ofport)
1669 const char *netdev_name = ofport->opp.name;
1671 netdev_monitor_add(p->netdev_monitor, ofport->netdev);
1672 hmap_insert(&p->ports, &ofport->hmap_node, hash_int(ofport->odp_port, 0));
1673 shash_add(&p->port_by_name, netdev_name, ofport);
1675 ofproto_sflow_add_port(p->sflow, ofport->odp_port, netdev_name);
1680 ofport_remove(struct ofproto *p, struct ofport *ofport)
1682 netdev_monitor_remove(p->netdev_monitor, ofport->netdev);
1683 hmap_remove(&p->ports, &ofport->hmap_node);
1684 shash_delete(&p->port_by_name,
1685 shash_find(&p->port_by_name, ofport->opp.name));
1687 ofproto_sflow_del_port(p->sflow, ofport->odp_port);
1692 ofport_free(struct ofport *ofport)
1695 netdev_close(ofport->netdev);
1700 static struct ofport *
1701 get_port(const struct ofproto *ofproto, uint16_t odp_port)
1703 struct ofport *port;
1705 HMAP_FOR_EACH_IN_BUCKET (port, hmap_node,
1706 hash_int(odp_port, 0), &ofproto->ports) {
1707 if (port->odp_port == odp_port) {
1715 update_port(struct ofproto *p, const char *devname)
1717 struct odp_port odp_port;
1718 struct ofport *old_ofport;
1719 struct ofport *new_ofport;
1722 COVERAGE_INC(ofproto_update_port);
1724 /* Query the datapath for port information. */
1725 error = dpif_port_query_by_name(p->dpif, devname, &odp_port);
1727 /* Find the old ofport. */
1728 old_ofport = shash_find_data(&p->port_by_name, devname);
1731 /* There's no port named 'devname' but there might be a port with
1732 * the same port number. This could happen if a port is deleted
1733 * and then a new one added in its place very quickly, or if a port
1734 * is renamed. In the former case we want to send an OFPPR_DELETE
1735 * and an OFPPR_ADD, and in the latter case we want to send a
1736 * single OFPPR_MODIFY. We can distinguish the cases by comparing
1737 * the old port's ifindex against the new port, or perhaps less
1738 * reliably but more portably by comparing the old port's MAC
1739 * against the new port's MAC. However, this code isn't that smart
1740 * and always sends an OFPPR_MODIFY (XXX). */
1741 old_ofport = get_port(p, odp_port.port);
1743 } else if (error != ENOENT && error != ENODEV) {
1744 VLOG_WARN_RL(&rl, "dpif_port_query_by_name returned unexpected error "
1745 "%s", strerror(error));
1749 /* Create a new ofport. */
1750 new_ofport = !error ? make_ofport(&odp_port) : NULL;
1752 /* Eliminate a few pathological cases. */
1753 if (!old_ofport && !new_ofport) {
1755 } else if (old_ofport && new_ofport) {
1756 /* Most of the 'config' bits are OpenFlow soft state, but
1757 * OFPPC_PORT_DOWN is maintained by the kernel. So transfer the
1758 * OpenFlow bits from old_ofport. (make_ofport() only sets
1759 * OFPPC_PORT_DOWN and leaves the other bits 0.) */
1760 new_ofport->opp.config |= old_ofport->opp.config & ~OFPPC_PORT_DOWN;
1762 if (ofport_equal(old_ofport, new_ofport)) {
1763 /* False alarm--no change. */
1764 ofport_free(new_ofport);
1769 /* Now deal with the normal cases. */
1771 ofport_remove(p, old_ofport);
1774 ofport_install(p, new_ofport);
1776 send_port_status(p, new_ofport ? new_ofport : old_ofport,
1777 (!old_ofport ? OFPPR_ADD
1778 : !new_ofport ? OFPPR_DELETE
1780 ofport_free(old_ofport);
1784 init_ports(struct ofproto *p)
1786 struct odp_port *ports;
1791 error = dpif_port_list(p->dpif, &ports, &n_ports);
1796 for (i = 0; i < n_ports; i++) {
1797 const struct odp_port *odp_port = &ports[i];
1798 if (!ofport_conflicts(p, odp_port)) {
1799 struct ofport *ofport = make_ofport(odp_port);
1801 ofport_install(p, ofport);
1809 static struct ofconn *
1810 ofconn_create(struct ofproto *p, struct rconn *rconn, enum ofconn_type type)
1812 struct ofconn *ofconn = xzalloc(sizeof *ofconn);
1813 ofconn->ofproto = p;
1814 list_push_back(&p->all_conns, &ofconn->node);
1815 ofconn->rconn = rconn;
1816 ofconn->type = type;
1817 ofconn->flow_format = NXFF_OPENFLOW10;
1818 ofconn->role = NX_ROLE_OTHER;
1819 ofconn->packet_in_counter = rconn_packet_counter_create ();
1820 ofconn->pktbuf = NULL;
1821 ofconn->miss_send_len = 0;
1822 ofconn->reply_counter = rconn_packet_counter_create ();
1827 ofconn_destroy(struct ofconn *ofconn)
1829 if (ofconn->type == OFCONN_PRIMARY) {
1830 hmap_remove(&ofconn->ofproto->controllers, &ofconn->hmap_node);
1832 discovery_destroy(ofconn->discovery);
1834 list_remove(&ofconn->node);
1835 switch_status_unregister(ofconn->ss);
1836 rconn_destroy(ofconn->rconn);
1837 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1838 rconn_packet_counter_destroy(ofconn->reply_counter);
1839 pktbuf_destroy(ofconn->pktbuf);
1844 ofconn_run(struct ofconn *ofconn)
1846 struct ofproto *p = ofconn->ofproto;
1850 if (ofconn->discovery) {
1851 char *controller_name;
1852 if (rconn_is_connectivity_questionable(ofconn->rconn)) {
1853 discovery_question_connectivity(ofconn->discovery);
1855 if (discovery_run(ofconn->discovery, &controller_name)) {
1856 if (controller_name) {
1857 char *ofconn_name = ofconn_make_name(p, controller_name);
1858 rconn_connect(ofconn->rconn, controller_name, ofconn_name);
1861 rconn_disconnect(ofconn->rconn);
1866 for (i = 0; i < N_SCHEDULERS; i++) {
1867 pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn);
1870 rconn_run(ofconn->rconn);
1872 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1873 /* Limit the number of iterations to prevent other tasks from
1875 for (iteration = 0; iteration < 50; iteration++) {
1876 struct ofpbuf *of_msg = rconn_recv(ofconn->rconn);
1881 fail_open_maybe_recover(p->fail_open);
1883 handle_openflow(ofconn, of_msg);
1884 ofpbuf_delete(of_msg);
1888 if (!ofconn->discovery && !rconn_is_alive(ofconn->rconn)) {
1889 ofconn_destroy(ofconn);
1894 ofconn_wait(struct ofconn *ofconn)
1898 if (ofconn->discovery) {
1899 discovery_wait(ofconn->discovery);
1901 for (i = 0; i < N_SCHEDULERS; i++) {
1902 pinsched_wait(ofconn->schedulers[i]);
1904 rconn_run_wait(ofconn->rconn);
1905 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1906 rconn_recv_wait(ofconn->rconn);
1908 COVERAGE_INC(ofproto_ofconn_stuck);
1912 /* Returns true if 'ofconn' should receive asynchronous messages. */
1914 ofconn_receives_async_msgs(const struct ofconn *ofconn)
1916 if (ofconn->type == OFCONN_PRIMARY) {
1917 /* Primary controllers always get asynchronous messages unless they
1918 * have configured themselves as "slaves". */
1919 return ofconn->role != NX_ROLE_SLAVE;
1921 /* Service connections don't get asynchronous messages unless they have
1922 * explicitly asked for them by setting a nonzero miss send length. */
1923 return ofconn->miss_send_len > 0;
1927 /* Returns a human-readable name for an OpenFlow connection between 'ofproto'
1928 * and 'target', suitable for use in log messages for identifying the
1931 * The name is dynamically allocated. The caller should free it (with free())
1932 * when it is no longer needed. */
1934 ofconn_make_name(const struct ofproto *ofproto, const char *target)
1936 return xasprintf("%s<->%s", dpif_base_name(ofproto->dpif), target);
1940 ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst)
1944 for (i = 0; i < N_SCHEDULERS; i++) {
1945 struct pinsched **s = &ofconn->schedulers[i];
1949 *s = pinsched_create(rate, burst,
1950 ofconn->ofproto->switch_status);
1952 pinsched_set_limits(*s, rate, burst);
1955 pinsched_destroy(*s);
1962 ofservice_reconfigure(struct ofservice *ofservice,
1963 const struct ofproto_controller *c)
1965 ofservice->probe_interval = c->probe_interval;
1966 ofservice->rate_limit = c->rate_limit;
1967 ofservice->burst_limit = c->burst_limit;
1970 /* Creates a new ofservice in 'ofproto'. Returns 0 if successful, otherwise a
1971 * positive errno value. */
1973 ofservice_create(struct ofproto *ofproto, const struct ofproto_controller *c)
1975 struct ofservice *ofservice;
1976 struct pvconn *pvconn;
1979 error = pvconn_open(c->target, &pvconn);
1984 ofservice = xzalloc(sizeof *ofservice);
1985 hmap_insert(&ofproto->services, &ofservice->node,
1986 hash_string(c->target, 0));
1987 ofservice->pvconn = pvconn;
1989 ofservice_reconfigure(ofservice, c);
1995 ofservice_destroy(struct ofproto *ofproto, struct ofservice *ofservice)
1997 hmap_remove(&ofproto->services, &ofservice->node);
1998 pvconn_close(ofservice->pvconn);
2002 /* Finds and returns the ofservice within 'ofproto' that has the given
2003 * 'target', or a null pointer if none exists. */
2004 static struct ofservice *
2005 ofservice_lookup(struct ofproto *ofproto, const char *target)
2007 struct ofservice *ofservice;
2009 HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0),
2010 &ofproto->services) {
2011 if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) {
2018 /* Returns true if 'rule' should be hidden from the controller.
2020 * Rules with priority higher than UINT16_MAX are set up by ofproto itself
2021 * (e.g. by in-band control) and are intentionally hidden from the
2024 rule_is_hidden(const struct rule *rule)
2026 return rule->cr.priority > UINT16_MAX;
2029 /* Creates and returns a new rule initialized as specified.
2031 * The caller is responsible for inserting the rule into the classifier (with
2032 * rule_insert()). */
2033 static struct rule *
2034 rule_create(const struct cls_rule *cls_rule,
2035 const union ofp_action *actions, size_t n_actions,
2036 uint16_t idle_timeout, uint16_t hard_timeout,
2037 ovs_be64 flow_cookie, bool send_flow_removed)
2039 struct rule *rule = xzalloc(sizeof *rule);
2040 rule->cr = *cls_rule;
2041 rule->idle_timeout = idle_timeout;
2042 rule->hard_timeout = hard_timeout;
2043 rule->flow_cookie = flow_cookie;
2044 rule->used = rule->created = time_msec();
2045 rule->send_flow_removed = send_flow_removed;
2046 list_init(&rule->facets);
2047 if (n_actions > 0) {
2048 rule->n_actions = n_actions;
2049 rule->actions = xmemdup(actions, n_actions * sizeof *actions);
2055 static struct rule *
2056 rule_from_cls_rule(const struct cls_rule *cls_rule)
2058 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
2062 rule_free(struct rule *rule)
2064 free(rule->actions);
2068 /* Destroys 'rule' and iterates through all of its facets and revalidates them,
2069 * destroying any that no longer has a rule (which is probably all of them).
2071 * The caller must have already removed 'rule' from the classifier. */
2073 rule_destroy(struct ofproto *ofproto, struct rule *rule)
2075 struct facet *facet, *next_facet;
2076 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
2077 facet_revalidate(ofproto, facet);
2082 /* Returns true if 'rule' has an OpenFlow OFPAT_OUTPUT or OFPAT_ENQUEUE action
2083 * that outputs to 'out_port' (output to OFPP_FLOOD and OFPP_ALL doesn't
2086 rule_has_out_port(const struct rule *rule, ovs_be16 out_port)
2088 const union ofp_action *oa;
2089 struct actions_iterator i;
2091 if (out_port == htons(OFPP_NONE)) {
2094 for (oa = actions_first(&i, rule->actions, rule->n_actions); oa;
2095 oa = actions_next(&i)) {
2096 if (action_outputs_to_port(oa, out_port)) {
2103 /* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
2104 * 'packet', which arrived on 'in_port'.
2106 * Takes ownership of 'packet'. */
2108 execute_odp_actions(struct ofproto *ofproto, const struct flow *flow,
2109 const struct nlattr *odp_actions, size_t actions_len,
2110 struct ofpbuf *packet)
2112 if (actions_len == NLA_ALIGN(NLA_HDRLEN + sizeof(uint64_t))
2113 && odp_actions->nla_type == ODPAT_CONTROLLER) {
2114 /* As an optimization, avoid a round-trip from userspace to kernel to
2115 * userspace. This also avoids possibly filling up kernel packet
2116 * buffers along the way. */
2117 struct dpif_upcall upcall;
2119 upcall.type = _ODPL_ACTION_NR;
2120 upcall.packet = packet;
2123 upcall.userdata = nl_attr_get_u64(odp_actions);
2124 upcall.sample_pool = 0;
2125 upcall.actions = NULL;
2126 upcall.actions_len = 0;
2128 send_packet_in(ofproto, &upcall, flow, false);
2134 error = dpif_execute(ofproto->dpif, odp_actions, actions_len, packet);
2135 ofpbuf_delete(packet);
2140 /* Executes the actions indicated by 'facet' on 'packet' and credits 'facet''s
2141 * statistics appropriately. 'packet' must have at least sizeof(struct
2142 * ofp_packet_in) bytes of headroom.
2144 * For correct results, 'packet' must actually be in 'facet''s flow; that is,
2145 * applying flow_extract() to 'packet' would yield the same flow as
2148 * 'facet' must have accurately composed ODP actions; that is, it must not be
2149 * in need of revalidation.
2151 * Takes ownership of 'packet'. */
2153 facet_execute(struct ofproto *ofproto, struct facet *facet,
2154 struct ofpbuf *packet)
2156 struct odp_flow_stats stats;
2158 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
2160 flow_extract_stats(&facet->flow, packet, &stats);
2161 if (execute_odp_actions(ofproto, &facet->flow,
2162 facet->actions, facet->actions_len, packet)) {
2163 facet_update_stats(ofproto, facet, &stats);
2164 facet->used = time_msec();
2165 netflow_flow_update_time(ofproto->netflow,
2166 &facet->nf_flow, facet->used);
2170 /* Executes the actions indicated by 'rule' on 'packet' and credits 'rule''s
2171 * statistics (or the statistics for one of its facets) appropriately.
2172 * 'packet' must have at least sizeof(struct ofp_packet_in) bytes of headroom.
2174 * 'packet' doesn't necessarily have to match 'rule'. 'rule' will be credited
2175 * with statistics for 'packet' either way.
2177 * Takes ownership of 'packet'. */
2179 rule_execute(struct ofproto *ofproto, struct rule *rule, uint16_t in_port,
2180 struct ofpbuf *packet)
2182 struct action_xlate_ctx ctx;
2183 struct ofpbuf *odp_actions;
2184 struct facet *facet;
2188 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
2190 flow_extract(packet, 0, in_port, &flow);
2192 /* First look for a related facet. If we find one, account it to that. */
2193 facet = facet_lookup_valid(ofproto, &flow);
2194 if (facet && facet->rule == rule) {
2195 facet_execute(ofproto, facet, packet);
2199 /* Otherwise, if 'rule' is in fact the correct rule for 'packet', then
2200 * create a new facet for it and use that. */
2201 if (rule_lookup(ofproto, &flow) == rule) {
2202 facet = facet_create(ofproto, rule, &flow, packet);
2203 facet_execute(ofproto, facet, packet);
2204 facet_install(ofproto, facet, true);
2208 /* We can't account anything to a facet. If we were to try, then that
2209 * facet would have a non-matching rule, busting our invariants. */
2210 action_xlate_ctx_init(&ctx, ofproto, &flow, packet);
2211 odp_actions = xlate_actions(&ctx, rule->actions, rule->n_actions);
2212 size = packet->size;
2213 if (execute_odp_actions(ofproto, &flow, odp_actions->data,
2214 odp_actions->size, packet)) {
2215 rule->used = time_msec();
2216 rule->packet_count++;
2217 rule->byte_count += size;
2219 ofpbuf_delete(odp_actions);
2222 /* Inserts 'rule' into 'p''s flow table. */
2224 rule_insert(struct ofproto *p, struct rule *rule)
2226 struct rule *displaced_rule;
2228 displaced_rule = rule_from_cls_rule(classifier_insert(&p->cls, &rule->cr));
2229 if (displaced_rule) {
2230 rule_destroy(p, displaced_rule);
2232 p->need_revalidate = true;
2235 /* Creates and returns a new facet within 'ofproto' owned by 'rule', given a
2236 * 'flow' and an example 'packet' within that flow.
2238 * The caller must already have determined that no facet with an identical
2239 * 'flow' exists in 'ofproto' and that 'flow' is the best match for 'rule' in
2240 * 'ofproto''s classifier table. */
2241 static struct facet *
2242 facet_create(struct ofproto *ofproto, struct rule *rule,
2243 const struct flow *flow, const struct ofpbuf *packet)
2245 struct facet *facet;
2247 facet = xzalloc(sizeof *facet);
2248 facet->used = time_msec();
2249 hmap_insert(&ofproto->facets, &facet->hmap_node, flow_hash(flow, 0));
2250 list_push_back(&rule->facets, &facet->list_node);
2252 facet->flow = *flow;
2253 netflow_flow_init(&facet->nf_flow);
2254 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, facet->used);
2256 facet_make_actions(ofproto, facet, packet);
2262 facet_free(struct facet *facet)
2264 free(facet->actions);
2268 /* Remove 'rule' from 'ofproto' and free up the associated memory:
2270 * - Removes 'rule' from the classifier.
2272 * - If 'rule' has facets, revalidates them (and possibly uninstalls and
2273 * destroys them), via rule_destroy().
2276 rule_remove(struct ofproto *ofproto, struct rule *rule)
2278 COVERAGE_INC(ofproto_del_rule);
2279 ofproto->need_revalidate = true;
2280 classifier_remove(&ofproto->cls, &rule->cr);
2281 rule_destroy(ofproto, rule);
2284 /* Remove 'facet' from 'ofproto' and free up the associated memory:
2286 * - If 'facet' was installed in the datapath, uninstalls it and updates its
2287 * rule's statistics, via facet_uninstall().
2289 * - Removes 'facet' from its rule and from ofproto->facets.
2292 facet_remove(struct ofproto *ofproto, struct facet *facet)
2294 facet_uninstall(ofproto, facet);
2295 facet_flush_stats(ofproto, facet);
2296 hmap_remove(&ofproto->facets, &facet->hmap_node);
2297 list_remove(&facet->list_node);
2301 /* Composes the ODP actions for 'facet' based on its rule's actions. */
2303 facet_make_actions(struct ofproto *p, struct facet *facet,
2304 const struct ofpbuf *packet)
2306 const struct rule *rule = facet->rule;
2307 struct ofpbuf *odp_actions;
2308 struct action_xlate_ctx ctx;
2310 action_xlate_ctx_init(&ctx, p, &facet->flow, packet);
2311 odp_actions = xlate_actions(&ctx, rule->actions, rule->n_actions);
2312 facet->tags = ctx.tags;
2313 facet->may_install = ctx.may_set_up_flow;
2314 facet->nf_flow.output_iface = ctx.nf_output_iface;
2316 if (facet->actions_len != odp_actions->size
2317 || memcmp(facet->actions, odp_actions->data, odp_actions->size)) {
2318 free(facet->actions);
2319 facet->actions_len = odp_actions->size;
2320 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
2323 ofpbuf_delete(odp_actions);
2327 facet_put__(struct ofproto *ofproto, struct facet *facet, int flags,
2328 struct odp_flow_put *put)
2330 uint32_t keybuf[ODPUTIL_FLOW_KEY_U32S];
2333 ofpbuf_use_stack(&key, keybuf, sizeof keybuf);
2334 odp_flow_key_from_flow(&key, &facet->flow);
2335 assert(key.base == keybuf);
2337 memset(&put->flow.stats, 0, sizeof put->flow.stats);
2338 put->flow.key = key.data;
2339 put->flow.key_len = key.size;
2340 put->flow.actions = facet->actions;
2341 put->flow.actions_len = facet->actions_len;
2342 put->flow.flags = 0;
2344 return dpif_flow_put(ofproto->dpif, put);
2347 /* If 'facet' is installable, inserts or re-inserts it into 'p''s datapath. If
2348 * 'zero_stats' is true, clears any existing statistics from the datapath for
2351 facet_install(struct ofproto *p, struct facet *facet, bool zero_stats)
2353 if (facet->may_install) {
2354 struct odp_flow_put put;
2357 flags = ODPPF_CREATE | ODPPF_MODIFY;
2359 flags |= ODPPF_ZERO_STATS;
2361 if (!facet_put__(p, facet, flags, &put)) {
2362 facet->installed = true;
2367 /* Ensures that the bytes in 'facet', plus 'extra_bytes', have been passed up
2368 * to the accounting hook function in the ofhooks structure. */
2370 facet_account(struct ofproto *ofproto,
2371 struct facet *facet, uint64_t extra_bytes)
2373 uint64_t total_bytes = facet->byte_count + extra_bytes;
2375 if (ofproto->ofhooks->account_flow_cb
2376 && total_bytes > facet->accounted_bytes)
2378 ofproto->ofhooks->account_flow_cb(
2379 &facet->flow, facet->tags, facet->actions, facet->actions_len,
2380 total_bytes - facet->accounted_bytes, ofproto->aux);
2381 facet->accounted_bytes = total_bytes;
2385 /* If 'rule' is installed in the datapath, uninstalls it. */
2387 facet_uninstall(struct ofproto *p, struct facet *facet)
2389 if (facet->installed) {
2390 uint32_t keybuf[ODPUTIL_FLOW_KEY_U32S];
2391 struct odp_flow odp_flow;
2394 ofpbuf_use_stack(&key, keybuf, sizeof keybuf);
2395 odp_flow_key_from_flow(&key, &facet->flow);
2396 assert(key.base == keybuf);
2398 odp_flow.key = key.data;
2399 odp_flow.key_len = key.size;
2400 odp_flow.actions = NULL;
2401 odp_flow.actions_len = 0;
2403 if (!dpif_flow_del(p->dpif, &odp_flow)) {
2404 facet_update_stats(p, facet, &odp_flow.stats);
2406 facet->installed = false;
2410 /* Returns true if the only action for 'facet' is to send to the controller.
2411 * (We don't report NetFlow expiration messages for such facets because they
2412 * are just part of the control logic for the network, not real traffic). */
2414 facet_is_controller_flow(struct facet *facet)
2417 && facet->rule->n_actions == 1
2418 && action_outputs_to_port(&facet->rule->actions[0],
2419 htons(OFPP_CONTROLLER)));
2422 /* Folds all of 'facet''s statistics into its rule. Also updates the
2423 * accounting ofhook and emits a NetFlow expiration if appropriate. */
2425 facet_flush_stats(struct ofproto *ofproto, struct facet *facet)
2427 facet_account(ofproto, facet, 0);
2429 if (ofproto->netflow && !facet_is_controller_flow(facet)) {
2430 struct ofexpired expired;
2431 expired.flow = facet->flow;
2432 expired.packet_count = facet->packet_count;
2433 expired.byte_count = facet->byte_count;
2434 expired.used = facet->used;
2435 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
2438 facet->rule->packet_count += facet->packet_count;
2439 facet->rule->byte_count += facet->byte_count;
2441 /* Reset counters to prevent double counting if 'facet' ever gets
2443 facet->packet_count = 0;
2444 facet->byte_count = 0;
2445 facet->accounted_bytes = 0;
2447 netflow_flow_clear(&facet->nf_flow);
2450 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
2451 * Returns it if found, otherwise a null pointer.
2453 * The returned facet might need revalidation; use facet_lookup_valid()
2454 * instead if that is important. */
2455 static struct facet *
2456 facet_find(struct ofproto *ofproto, const struct flow *flow)
2458 struct facet *facet;
2460 HMAP_FOR_EACH_WITH_HASH (facet, hmap_node, flow_hash(flow, 0),
2462 if (flow_equal(flow, &facet->flow)) {
2470 /* Searches 'ofproto''s table of facets for one exactly equal to 'flow'.
2471 * Returns it if found, otherwise a null pointer.
2473 * The returned facet is guaranteed to be valid. */
2474 static struct facet *
2475 facet_lookup_valid(struct ofproto *ofproto, const struct flow *flow)
2477 struct facet *facet = facet_find(ofproto, flow);
2479 /* The facet we found might not be valid, since we could be in need of
2480 * revalidation. If it is not valid, don't return it. */
2482 && ofproto->need_revalidate
2483 && !facet_revalidate(ofproto, facet)) {
2484 COVERAGE_INC(ofproto_invalidated);
2491 /* Re-searches 'ofproto''s classifier for a rule matching 'facet':
2493 * - If the rule found is different from 'facet''s current rule, moves
2494 * 'facet' to the new rule and recompiles its actions.
2496 * - If the rule found is the same as 'facet''s current rule, leaves 'facet'
2497 * where it is and recompiles its actions anyway.
2499 * - If there is none, destroys 'facet'.
2501 * Returns true if 'facet' still exists, false if it has been destroyed. */
2503 facet_revalidate(struct ofproto *ofproto, struct facet *facet)
2505 struct action_xlate_ctx ctx;
2506 struct ofpbuf *odp_actions;
2507 struct rule *new_rule;
2508 bool actions_changed;
2510 COVERAGE_INC(facet_revalidate);
2512 /* Determine the new rule. */
2513 new_rule = rule_lookup(ofproto, &facet->flow);
2515 /* No new rule, so delete the facet. */
2516 facet_remove(ofproto, facet);
2520 /* Calculate new ODP actions.
2522 * We do not modify any 'facet' state yet, because we might need to, e.g.,
2523 * emit a NetFlow expiration and, if so, we need to have the old state
2524 * around to properly compose it. */
2525 action_xlate_ctx_init(&ctx, ofproto, &facet->flow, NULL);
2526 odp_actions = xlate_actions(&ctx, new_rule->actions, new_rule->n_actions);
2527 actions_changed = (facet->actions_len != odp_actions->size
2528 || memcmp(facet->actions, odp_actions->data,
2529 facet->actions_len));
2531 /* If the ODP actions changed or the installability changed, then we need
2532 * to talk to the datapath. */
2533 if (actions_changed || facet->may_install != facet->installed) {
2534 if (facet->may_install) {
2535 uint32_t keybuf[ODPUTIL_FLOW_KEY_U32S];
2536 struct odp_flow_put put;
2539 ofpbuf_use_stack(&key, keybuf, sizeof keybuf);
2540 odp_flow_key_from_flow(&key, &facet->flow);
2542 memset(&put.flow.stats, 0, sizeof put.flow.stats);
2543 put.flow.key = key.data;
2544 put.flow.key_len = key.size;
2545 put.flow.actions = odp_actions->data;
2546 put.flow.actions_len = odp_actions->size;
2548 put.flags = ODPPF_CREATE | ODPPF_MODIFY | ODPPF_ZERO_STATS;
2549 dpif_flow_put(ofproto->dpif, &put);
2551 facet_update_stats(ofproto, facet, &put.flow.stats);
2553 facet_uninstall(ofproto, facet);
2556 /* The datapath flow is gone or has zeroed stats, so push stats out of
2557 * 'facet' into 'rule'. */
2558 facet_flush_stats(ofproto, facet);
2561 /* Update 'facet' now that we've taken care of all the old state. */
2562 facet->tags = ctx.tags;
2563 facet->nf_flow.output_iface = ctx.nf_output_iface;
2564 facet->may_install = ctx.may_set_up_flow;
2565 if (actions_changed) {
2566 free(facet->actions);
2567 facet->actions_len = odp_actions->size;
2568 facet->actions = xmemdup(odp_actions->data, odp_actions->size);
2570 if (facet->rule != new_rule) {
2571 COVERAGE_INC(facet_changed_rule);
2572 list_remove(&facet->list_node);
2573 list_push_back(&new_rule->facets, &facet->list_node);
2574 facet->rule = new_rule;
2575 facet->used = new_rule->created;
2578 ofpbuf_delete(odp_actions);
2584 queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
2585 struct rconn_packet_counter *counter)
2587 update_openflow_length(msg);
2588 if (rconn_send(ofconn->rconn, msg, counter)) {
2594 send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh,
2597 struct ofpbuf *buf = ofputil_encode_error_msg(error, oh);
2599 COVERAGE_INC(ofproto_error);
2600 queue_tx(buf, ofconn, ofconn->reply_counter);
2605 hton_ofp_phy_port(struct ofp_phy_port *opp)
2607 opp->port_no = htons(opp->port_no);
2608 opp->config = htonl(opp->config);
2609 opp->state = htonl(opp->state);
2610 opp->curr = htonl(opp->curr);
2611 opp->advertised = htonl(opp->advertised);
2612 opp->supported = htonl(opp->supported);
2613 opp->peer = htonl(opp->peer);
2617 handle_echo_request(struct ofconn *ofconn, const struct ofp_header *oh)
2619 queue_tx(make_echo_reply(oh), ofconn, ofconn->reply_counter);
2624 handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh)
2626 struct ofp_switch_features *osf;
2628 struct ofport *port;
2630 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
2631 osf->datapath_id = htonll(ofconn->ofproto->datapath_id);
2632 osf->n_buffers = htonl(pktbuf_capacity());
2634 osf->capabilities = htonl(OFPC_FLOW_STATS | OFPC_TABLE_STATS |
2635 OFPC_PORT_STATS | OFPC_ARP_MATCH_IP);
2636 osf->actions = htonl((1u << OFPAT_OUTPUT) |
2637 (1u << OFPAT_SET_VLAN_VID) |
2638 (1u << OFPAT_SET_VLAN_PCP) |
2639 (1u << OFPAT_STRIP_VLAN) |
2640 (1u << OFPAT_SET_DL_SRC) |
2641 (1u << OFPAT_SET_DL_DST) |
2642 (1u << OFPAT_SET_NW_SRC) |
2643 (1u << OFPAT_SET_NW_DST) |
2644 (1u << OFPAT_SET_NW_TOS) |
2645 (1u << OFPAT_SET_TP_SRC) |
2646 (1u << OFPAT_SET_TP_DST) |
2647 (1u << OFPAT_ENQUEUE));
2649 HMAP_FOR_EACH (port, hmap_node, &ofconn->ofproto->ports) {
2650 hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
2653 queue_tx(buf, ofconn, ofconn->reply_counter);
2658 handle_get_config_request(struct ofconn *ofconn, const struct ofp_header *oh)
2661 struct ofp_switch_config *osc;
2665 /* Figure out flags. */
2666 dpif_get_drop_frags(ofconn->ofproto->dpif, &drop_frags);
2667 flags = drop_frags ? OFPC_FRAG_DROP : OFPC_FRAG_NORMAL;
2670 osc = make_openflow_xid(sizeof *osc, OFPT_GET_CONFIG_REPLY, oh->xid, &buf);
2671 osc->flags = htons(flags);
2672 osc->miss_send_len = htons(ofconn->miss_send_len);
2673 queue_tx(buf, ofconn, ofconn->reply_counter);
2679 handle_set_config(struct ofconn *ofconn, const struct ofp_switch_config *osc)
2681 uint16_t flags = ntohs(osc->flags);
2683 if (ofconn->type == OFCONN_PRIMARY && ofconn->role != NX_ROLE_SLAVE) {
2684 switch (flags & OFPC_FRAG_MASK) {
2685 case OFPC_FRAG_NORMAL:
2686 dpif_set_drop_frags(ofconn->ofproto->dpif, false);
2688 case OFPC_FRAG_DROP:
2689 dpif_set_drop_frags(ofconn->ofproto->dpif, true);
2692 VLOG_WARN_RL(&rl, "requested bad fragment mode (flags=%"PRIx16")",
2698 ofconn->miss_send_len = ntohs(osc->miss_send_len);
2703 /* Maximum depth of flow table recursion (due to NXAST_RESUBMIT actions) in a
2704 * flow translation. */
2705 #define MAX_RESUBMIT_RECURSION 16
2707 static void do_xlate_actions(const union ofp_action *in, size_t n_in,
2708 struct action_xlate_ctx *ctx);
2711 add_output_action(struct action_xlate_ctx *ctx, uint16_t port)
2713 const struct ofport *ofport = get_port(ctx->ofproto, port);
2716 if (ofport->opp.config & OFPPC_NO_FWD) {
2717 /* Forwarding disabled on port. */
2722 * We don't have an ofport record for this port, but it doesn't hurt to
2723 * allow forwarding to it anyhow. Maybe such a port will appear later
2724 * and we're pre-populating the flow table.
2728 nl_msg_put_u32(ctx->odp_actions, ODPAT_OUTPUT, port);
2729 ctx->nf_output_iface = port;
2732 static struct rule *
2733 rule_lookup(struct ofproto *ofproto, const struct flow *flow)
2735 return rule_from_cls_rule(classifier_lookup(&ofproto->cls, flow));
2739 xlate_table_action(struct action_xlate_ctx *ctx, uint16_t in_port)
2741 if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
2742 uint16_t old_in_port;
2745 /* Look up a flow with 'in_port' as the input port. Then restore the
2746 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2747 * have surprising behavior). */
2748 old_in_port = ctx->flow.in_port;
2749 ctx->flow.in_port = in_port;
2750 rule = rule_lookup(ctx->ofproto, &ctx->flow);
2751 ctx->flow.in_port = old_in_port;
2753 if (ctx->resubmit_hook) {
2754 ctx->resubmit_hook(ctx, rule);
2759 do_xlate_actions(rule->actions, rule->n_actions, ctx);
2763 static struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
2765 VLOG_ERR_RL(&recurse_rl, "NXAST_RESUBMIT recursed over %d times",
2766 MAX_RESUBMIT_RECURSION);
2771 flood_packets(struct ofproto *ofproto, uint16_t odp_in_port, uint32_t mask,
2772 uint16_t *nf_output_iface, struct ofpbuf *odp_actions)
2774 struct ofport *ofport;
2776 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
2777 uint16_t odp_port = ofport->odp_port;
2778 if (odp_port != odp_in_port && !(ofport->opp.config & mask)) {
2779 nl_msg_put_u32(odp_actions, ODPAT_OUTPUT, odp_port);
2782 *nf_output_iface = NF_OUT_FLOOD;
2786 xlate_output_action__(struct action_xlate_ctx *ctx,
2787 uint16_t port, uint16_t max_len)
2790 uint16_t prev_nf_output_iface = ctx->nf_output_iface;
2792 ctx->nf_output_iface = NF_OUT_DROP;
2796 add_output_action(ctx, ctx->flow.in_port);
2799 xlate_table_action(ctx, ctx->flow.in_port);
2802 if (!ctx->ofproto->ofhooks->normal_cb(&ctx->flow, ctx->packet,
2803 ctx->odp_actions, &ctx->tags,
2804 &ctx->nf_output_iface,
2805 ctx->ofproto->aux)) {
2806 COVERAGE_INC(ofproto_uninstallable);
2807 ctx->may_set_up_flow = false;
2811 flood_packets(ctx->ofproto, ctx->flow.in_port, OFPPC_NO_FLOOD,
2812 &ctx->nf_output_iface, ctx->odp_actions);
2815 flood_packets(ctx->ofproto, ctx->flow.in_port, 0,
2816 &ctx->nf_output_iface, ctx->odp_actions);
2818 case OFPP_CONTROLLER:
2819 nl_msg_put_u64(ctx->odp_actions, ODPAT_CONTROLLER, max_len);
2822 add_output_action(ctx, ODPP_LOCAL);
2825 odp_port = ofp_port_to_odp_port(port);
2826 if (odp_port != ctx->flow.in_port) {
2827 add_output_action(ctx, odp_port);
2832 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2833 ctx->nf_output_iface = NF_OUT_FLOOD;
2834 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
2835 ctx->nf_output_iface = prev_nf_output_iface;
2836 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2837 ctx->nf_output_iface != NF_OUT_FLOOD) {
2838 ctx->nf_output_iface = NF_OUT_MULTI;
2843 xlate_output_action(struct action_xlate_ctx *ctx,
2844 const struct ofp_action_output *oao)
2846 xlate_output_action__(ctx, ntohs(oao->port), ntohs(oao->max_len));
2849 /* If the final ODP action in 'ctx' is "pop priority", drop it, as an
2850 * optimization, because we're going to add another action that sets the
2851 * priority immediately after, or because there are no actions following the
2854 remove_pop_action(struct action_xlate_ctx *ctx)
2856 if (ctx->odp_actions->size == ctx->last_pop_priority) {
2857 ctx->odp_actions->size -= NLA_ALIGN(NLA_HDRLEN);
2858 ctx->last_pop_priority = -1;
2863 add_pop_action(struct action_xlate_ctx *ctx)
2865 if (ctx->odp_actions->size != ctx->last_pop_priority) {
2866 nl_msg_put_flag(ctx->odp_actions, ODPAT_POP_PRIORITY);
2867 ctx->last_pop_priority = ctx->odp_actions->size;
2872 xlate_enqueue_action(struct action_xlate_ctx *ctx,
2873 const struct ofp_action_enqueue *oae)
2875 uint16_t ofp_port, odp_port;
2879 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(oae->queue_id),
2882 /* Fall back to ordinary output action. */
2883 xlate_output_action__(ctx, ntohs(oae->port), 0);
2887 /* Figure out ODP output port. */
2888 ofp_port = ntohs(oae->port);
2889 if (ofp_port != OFPP_IN_PORT) {
2890 odp_port = ofp_port_to_odp_port(ofp_port);
2892 odp_port = ctx->flow.in_port;
2895 /* Add ODP actions. */
2896 remove_pop_action(ctx);
2897 nl_msg_put_u32(ctx->odp_actions, ODPAT_SET_PRIORITY, priority);
2898 add_output_action(ctx, odp_port);
2899 add_pop_action(ctx);
2901 /* Update NetFlow output port. */
2902 if (ctx->nf_output_iface == NF_OUT_DROP) {
2903 ctx->nf_output_iface = odp_port;
2904 } else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
2905 ctx->nf_output_iface = NF_OUT_MULTI;
2910 xlate_set_queue_action(struct action_xlate_ctx *ctx,
2911 const struct nx_action_set_queue *nasq)
2916 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(nasq->queue_id),
2919 /* Couldn't translate queue to a priority, so ignore. A warning
2920 * has already been logged. */
2924 remove_pop_action(ctx);
2925 nl_msg_put_u32(ctx->odp_actions, ODPAT_SET_PRIORITY, priority);
2929 xlate_set_dl_tci(struct action_xlate_ctx *ctx)
2931 ovs_be16 tci = ctx->flow.vlan_tci;
2932 if (!(tci & htons(VLAN_CFI))) {
2933 nl_msg_put_flag(ctx->odp_actions, ODPAT_STRIP_VLAN);
2935 nl_msg_put_be16(ctx->odp_actions, ODPAT_SET_DL_TCI,
2936 tci & ~htons(VLAN_CFI));
2940 struct xlate_reg_state {
2946 save_reg_state(const struct action_xlate_ctx *ctx,
2947 struct xlate_reg_state *state)
2949 state->vlan_tci = ctx->flow.vlan_tci;
2950 state->tun_id = ctx->flow.tun_id;
2954 update_reg_state(struct action_xlate_ctx *ctx,
2955 const struct xlate_reg_state *state)
2957 if (ctx->flow.vlan_tci != state->vlan_tci) {
2958 xlate_set_dl_tci(ctx);
2960 if (ctx->flow.tun_id != state->tun_id) {
2961 nl_msg_put_be64(ctx->odp_actions, ODPAT_SET_TUNNEL, ctx->flow.tun_id);
2966 xlate_nicira_action(struct action_xlate_ctx *ctx,
2967 const struct nx_action_header *nah)
2969 const struct nx_action_resubmit *nar;
2970 const struct nx_action_set_tunnel *nast;
2971 const struct nx_action_set_queue *nasq;
2972 const struct nx_action_multipath *nam;
2973 enum nx_action_subtype subtype = ntohs(nah->subtype);
2974 struct xlate_reg_state state;
2977 assert(nah->vendor == htonl(NX_VENDOR_ID));
2979 case NXAST_RESUBMIT:
2980 nar = (const struct nx_action_resubmit *) nah;
2981 xlate_table_action(ctx, ofp_port_to_odp_port(ntohs(nar->in_port)));
2984 case NXAST_SET_TUNNEL:
2985 nast = (const struct nx_action_set_tunnel *) nah;
2986 tun_id = htonll(ntohl(nast->tun_id));
2987 nl_msg_put_be64(ctx->odp_actions, ODPAT_SET_TUNNEL, tun_id);
2988 ctx->flow.tun_id = tun_id;
2991 case NXAST_DROP_SPOOFED_ARP:
2992 if (ctx->flow.dl_type == htons(ETH_TYPE_ARP)) {
2993 nl_msg_put_flag(ctx->odp_actions, ODPAT_DROP_SPOOFED_ARP);
2997 case NXAST_SET_QUEUE:
2998 nasq = (const struct nx_action_set_queue *) nah;
2999 xlate_set_queue_action(ctx, nasq);
3002 case NXAST_POP_QUEUE:
3003 add_pop_action(ctx);
3006 case NXAST_REG_MOVE:
3007 save_reg_state(ctx, &state);
3008 nxm_execute_reg_move((const struct nx_action_reg_move *) nah,
3010 update_reg_state(ctx, &state);
3013 case NXAST_REG_LOAD:
3014 save_reg_state(ctx, &state);
3015 nxm_execute_reg_load((const struct nx_action_reg_load *) nah,
3017 update_reg_state(ctx, &state);
3021 /* Nothing to do. */
3024 case NXAST_SET_TUNNEL64:
3025 tun_id = ((const struct nx_action_set_tunnel64 *) nah)->tun_id;
3026 nl_msg_put_be64(ctx->odp_actions, ODPAT_SET_TUNNEL, tun_id);
3027 ctx->flow.tun_id = tun_id;
3030 case NXAST_MULTIPATH:
3031 nam = (const struct nx_action_multipath *) nah;
3032 multipath_execute(nam, &ctx->flow);
3035 /* If you add a new action here that modifies flow data, don't forget to
3036 * update the flow key in ctx->flow at the same time. */
3038 case NXAST_SNAT__OBSOLETE:
3040 VLOG_DBG_RL(&rl, "unknown Nicira action type %d", (int) subtype);
3046 do_xlate_actions(const union ofp_action *in, size_t n_in,
3047 struct action_xlate_ctx *ctx)
3049 struct actions_iterator iter;
3050 const union ofp_action *ia;
3051 const struct ofport *port;
3053 port = get_port(ctx->ofproto, ctx->flow.in_port);
3054 if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
3055 port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
3056 ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
3057 /* Drop this flow. */
3061 for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
3062 enum ofp_action_type type = ntohs(ia->type);
3063 const struct ofp_action_dl_addr *oada;
3067 xlate_output_action(ctx, &ia->output);
3070 case OFPAT_SET_VLAN_VID:
3071 ctx->flow.vlan_tci &= ~htons(VLAN_VID_MASK);
3072 ctx->flow.vlan_tci |= ia->vlan_vid.vlan_vid | htons(VLAN_CFI);
3073 xlate_set_dl_tci(ctx);
3076 case OFPAT_SET_VLAN_PCP:
3077 ctx->flow.vlan_tci &= ~htons(VLAN_PCP_MASK);
3078 ctx->flow.vlan_tci |= htons(
3079 (ia->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT) | VLAN_CFI);
3080 xlate_set_dl_tci(ctx);
3083 case OFPAT_STRIP_VLAN:
3084 ctx->flow.vlan_tci = htons(0);
3085 xlate_set_dl_tci(ctx);
3088 case OFPAT_SET_DL_SRC:
3089 oada = ((struct ofp_action_dl_addr *) ia);
3090 nl_msg_put_unspec(ctx->odp_actions, ODPAT_SET_DL_SRC,
3091 oada->dl_addr, ETH_ADDR_LEN);
3092 memcpy(ctx->flow.dl_src, oada->dl_addr, ETH_ADDR_LEN);
3095 case OFPAT_SET_DL_DST:
3096 oada = ((struct ofp_action_dl_addr *) ia);
3097 nl_msg_put_unspec(ctx->odp_actions, ODPAT_SET_DL_DST,
3098 oada->dl_addr, ETH_ADDR_LEN);
3099 memcpy(ctx->flow.dl_dst, oada->dl_addr, ETH_ADDR_LEN);
3102 case OFPAT_SET_NW_SRC:
3103 nl_msg_put_be32(ctx->odp_actions, ODPAT_SET_NW_SRC,
3104 ia->nw_addr.nw_addr);
3105 ctx->flow.nw_src = ia->nw_addr.nw_addr;
3108 case OFPAT_SET_NW_DST:
3109 nl_msg_put_be32(ctx->odp_actions, ODPAT_SET_NW_DST,
3110 ia->nw_addr.nw_addr);
3111 ctx->flow.nw_dst = ia->nw_addr.nw_addr;
3114 case OFPAT_SET_NW_TOS:
3115 nl_msg_put_u8(ctx->odp_actions, ODPAT_SET_NW_TOS,
3117 ctx->flow.nw_tos = ia->nw_tos.nw_tos;
3120 case OFPAT_SET_TP_SRC:
3121 nl_msg_put_be16(ctx->odp_actions, ODPAT_SET_TP_SRC,
3122 ia->tp_port.tp_port);
3123 ctx->flow.tp_src = ia->tp_port.tp_port;
3126 case OFPAT_SET_TP_DST:
3127 nl_msg_put_be16(ctx->odp_actions, ODPAT_SET_TP_DST,
3128 ia->tp_port.tp_port);
3129 ctx->flow.tp_dst = ia->tp_port.tp_port;
3133 xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
3137 xlate_enqueue_action(ctx, (const struct ofp_action_enqueue *) ia);
3141 VLOG_DBG_RL(&rl, "unknown action type %d", (int) type);
3148 action_xlate_ctx_init(struct action_xlate_ctx *ctx,
3149 struct ofproto *ofproto, const struct flow *flow,
3150 const struct ofpbuf *packet)
3152 ctx->ofproto = ofproto;
3154 ctx->packet = packet;
3155 ctx->resubmit_hook = NULL;
3158 static struct ofpbuf *
3159 xlate_actions(struct action_xlate_ctx *ctx,
3160 const union ofp_action *in, size_t n_in)
3162 COVERAGE_INC(ofproto_ofp2odp);
3164 ctx->odp_actions = ofpbuf_new(512);
3166 ctx->may_set_up_flow = true;
3167 ctx->nf_output_iface = NF_OUT_DROP;
3169 ctx->last_pop_priority = -1;
3170 do_xlate_actions(in, n_in, ctx);
3171 remove_pop_action(ctx);
3173 /* Check with in-band control to see if we're allowed to set up this
3175 if (!in_band_rule_check(ctx->ofproto->in_band, &ctx->flow,
3176 ctx->odp_actions->data, ctx->odp_actions->size)) {
3177 ctx->may_set_up_flow = false;
3180 return ctx->odp_actions;
3183 /* Checks whether 'ofconn' is a slave controller. If so, returns an OpenFlow
3184 * error message code (composed with ofp_mkerr()) for the caller to propagate
3185 * upward. Otherwise, returns 0.
3187 * The log message mentions 'msg_type'. */
3189 reject_slave_controller(struct ofconn *ofconn, const const char *msg_type)
3191 if (ofconn->type == OFCONN_PRIMARY && ofconn->role == NX_ROLE_SLAVE) {
3192 static struct vlog_rate_limit perm_rl = VLOG_RATE_LIMIT_INIT(1, 5);
3193 VLOG_WARN_RL(&perm_rl, "rejecting %s message from slave controller",
3196 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
3203 handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
3205 struct ofproto *p = ofconn->ofproto;
3206 struct ofp_packet_out *opo;
3207 struct ofpbuf payload, *buffer;
3208 union ofp_action *ofp_actions;
3209 struct action_xlate_ctx ctx;
3210 struct ofpbuf *odp_actions;
3211 struct ofpbuf request;
3213 size_t n_ofp_actions;
3217 COVERAGE_INC(ofproto_packet_out);
3219 error = reject_slave_controller(ofconn, "OFPT_PACKET_OUT");
3224 /* Get ofp_packet_out. */
3225 ofpbuf_use_const(&request, oh, ntohs(oh->length));
3226 opo = ofpbuf_pull(&request, offsetof(struct ofp_packet_out, actions));
3229 error = ofputil_pull_actions(&request, ntohs(opo->actions_len),
3230 &ofp_actions, &n_ofp_actions);
3236 if (opo->buffer_id != htonl(UINT32_MAX)) {
3237 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(opo->buffer_id),
3239 if (error || !buffer) {
3248 /* Extract flow, check actions. */
3249 flow_extract(&payload, 0, ofp_port_to_odp_port(ntohs(opo->in_port)),
3251 error = validate_actions(ofp_actions, n_ofp_actions, &flow, p->max_ports);
3257 action_xlate_ctx_init(&ctx, p, &flow, &payload);
3258 odp_actions = xlate_actions(&ctx, ofp_actions, n_ofp_actions);
3259 dpif_execute(p->dpif, odp_actions->data, odp_actions->size, &payload);
3260 ofpbuf_delete(odp_actions);
3263 ofpbuf_delete(buffer);
3268 update_port_config(struct ofproto *p, struct ofport *port,
3269 uint32_t config, uint32_t mask)
3271 mask &= config ^ port->opp.config;
3272 if (mask & OFPPC_PORT_DOWN) {
3273 if (config & OFPPC_PORT_DOWN) {
3274 netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
3276 netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
3279 #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | \
3280 OFPPC_NO_FWD | OFPPC_NO_FLOOD)
3281 if (mask & REVALIDATE_BITS) {
3282 COVERAGE_INC(ofproto_costly_flags);
3283 port->opp.config ^= mask & REVALIDATE_BITS;
3284 p->need_revalidate = true;
3286 #undef REVALIDATE_BITS
3287 if (mask & OFPPC_NO_PACKET_IN) {
3288 port->opp.config ^= OFPPC_NO_PACKET_IN;
3293 handle_port_mod(struct ofconn *ofconn, const struct ofp_header *oh)
3295 struct ofproto *p = ofconn->ofproto;
3296 const struct ofp_port_mod *opm = (const struct ofp_port_mod *) oh;
3297 struct ofport *port;
3300 error = reject_slave_controller(ofconn, "OFPT_PORT_MOD");
3305 port = get_port(p, ofp_port_to_odp_port(ntohs(opm->port_no)));
3307 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
3308 } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
3309 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR);
3311 update_port_config(p, port, ntohl(opm->config), ntohl(opm->mask));
3312 if (opm->advertise) {
3313 netdev_set_advertisements(port->netdev, ntohl(opm->advertise));
3319 static struct ofpbuf *
3320 make_ofp_stats_reply(ovs_be32 xid, ovs_be16 type, size_t body_len)
3322 struct ofp_stats_reply *osr;
3325 msg = ofpbuf_new(MIN(sizeof *osr + body_len, UINT16_MAX));
3326 osr = put_openflow_xid(sizeof *osr, OFPT_STATS_REPLY, xid, msg);
3328 osr->flags = htons(0);
3332 static struct ofpbuf *
3333 start_ofp_stats_reply(const struct ofp_header *request, size_t body_len)
3335 const struct ofp_stats_request *osr
3336 = (const struct ofp_stats_request *) request;
3337 return make_ofp_stats_reply(osr->header.xid, osr->type, body_len);
3341 append_ofp_stats_reply(size_t nbytes, struct ofconn *ofconn,
3342 struct ofpbuf **msgp)
3344 struct ofpbuf *msg = *msgp;
3345 assert(nbytes <= UINT16_MAX - sizeof(struct ofp_stats_reply));
3346 if (nbytes + msg->size > UINT16_MAX) {
3347 struct ofp_stats_reply *reply = msg->data;
3348 reply->flags = htons(OFPSF_REPLY_MORE);
3349 *msgp = make_ofp_stats_reply(reply->header.xid, reply->type, nbytes);
3350 queue_tx(msg, ofconn, ofconn->reply_counter);
3352 return ofpbuf_put_uninit(*msgp, nbytes);
3355 static struct ofpbuf *
3356 make_nxstats_reply(ovs_be32 xid, ovs_be32 subtype, size_t body_len)
3358 struct nicira_stats_msg *nsm;
3361 msg = ofpbuf_new(MIN(sizeof *nsm + body_len, UINT16_MAX));
3362 nsm = put_openflow_xid(sizeof *nsm, OFPT_STATS_REPLY, xid, msg);
3363 nsm->type = htons(OFPST_VENDOR);
3364 nsm->flags = htons(0);
3365 nsm->vendor = htonl(NX_VENDOR_ID);
3366 nsm->subtype = subtype;
3370 static struct ofpbuf *
3371 start_nxstats_reply(const struct nicira_stats_msg *request, size_t body_len)
3373 return make_nxstats_reply(request->header.xid, request->subtype, body_len);
3377 append_nxstats_reply(size_t nbytes, struct ofconn *ofconn,
3378 struct ofpbuf **msgp)
3380 struct ofpbuf *msg = *msgp;
3381 assert(nbytes <= UINT16_MAX - sizeof(struct nicira_stats_msg));
3382 if (nbytes + msg->size > UINT16_MAX) {
3383 struct nicira_stats_msg *reply = msg->data;
3384 reply->flags = htons(OFPSF_REPLY_MORE);
3385 *msgp = make_nxstats_reply(reply->header.xid, reply->subtype, nbytes);
3386 queue_tx(msg, ofconn, ofconn->reply_counter);
3388 ofpbuf_prealloc_tailroom(*msgp, nbytes);
3392 handle_desc_stats_request(struct ofconn *ofconn,
3393 const struct ofp_header *request)
3395 struct ofproto *p = ofconn->ofproto;
3396 struct ofp_desc_stats *ods;
3399 msg = start_ofp_stats_reply(request, sizeof *ods);
3400 ods = append_ofp_stats_reply(sizeof *ods, ofconn, &msg);
3401 memset(ods, 0, sizeof *ods);
3402 ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
3403 ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
3404 ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
3405 ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
3406 ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
3407 queue_tx(msg, ofconn, ofconn->reply_counter);
3413 handle_table_stats_request(struct ofconn *ofconn,
3414 const struct ofp_header *request)
3416 struct ofproto *p = ofconn->ofproto;
3417 struct ofp_table_stats *ots;
3420 msg = start_ofp_stats_reply(request, sizeof *ots * 2);
3422 /* Classifier table. */
3423 ots = append_ofp_stats_reply(sizeof *ots, ofconn, &msg);
3424 memset(ots, 0, sizeof *ots);
3425 strcpy(ots->name, "classifier");
3426 ots->wildcards = (ofconn->flow_format == NXFF_OPENFLOW10
3427 ? htonl(OFPFW_ALL) : htonl(OVSFW_ALL));
3428 ots->max_entries = htonl(1024 * 1024); /* An arbitrary big number. */
3429 ots->active_count = htonl(classifier_count(&p->cls));
3430 ots->lookup_count = htonll(0); /* XXX */
3431 ots->matched_count = htonll(0); /* XXX */
3433 queue_tx(msg, ofconn, ofconn->reply_counter);
3438 append_port_stat(struct ofport *port, struct ofconn *ofconn,
3439 struct ofpbuf **msgp)
3441 struct netdev_stats stats;
3442 struct ofp_port_stats *ops;
3444 /* Intentionally ignore return value, since errors will set
3445 * 'stats' to all-1s, which is correct for OpenFlow, and
3446 * netdev_get_stats() will log errors. */
3447 netdev_get_stats(port->netdev, &stats);
3449 ops = append_ofp_stats_reply(sizeof *ops, ofconn, msgp);
3450 ops->port_no = htons(port->opp.port_no);
3451 memset(ops->pad, 0, sizeof ops->pad);
3452 ops->rx_packets = htonll(stats.rx_packets);
3453 ops->tx_packets = htonll(stats.tx_packets);
3454 ops->rx_bytes = htonll(stats.rx_bytes);
3455 ops->tx_bytes = htonll(stats.tx_bytes);
3456 ops->rx_dropped = htonll(stats.rx_dropped);
3457 ops->tx_dropped = htonll(stats.tx_dropped);
3458 ops->rx_errors = htonll(stats.rx_errors);
3459 ops->tx_errors = htonll(stats.tx_errors);
3460 ops->rx_frame_err = htonll(stats.rx_frame_errors);
3461 ops->rx_over_err = htonll(stats.rx_over_errors);
3462 ops->rx_crc_err = htonll(stats.rx_crc_errors);
3463 ops->collisions = htonll(stats.collisions);
3467 handle_port_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
3469 struct ofproto *p = ofconn->ofproto;
3470 const struct ofp_port_stats_request *psr = ofputil_stats_body(oh);
3471 struct ofp_port_stats *ops;
3473 struct ofport *port;
3475 msg = start_ofp_stats_reply(oh, sizeof *ops * 16);
3476 if (psr->port_no != htons(OFPP_NONE)) {
3477 port = get_port(p, ofp_port_to_odp_port(ntohs(psr->port_no)));
3479 append_port_stat(port, ofconn, &msg);
3482 HMAP_FOR_EACH (port, hmap_node, &p->ports) {
3483 append_port_stat(port, ofconn, &msg);
3487 queue_tx(msg, ofconn, ofconn->reply_counter);
3491 /* Obtains statistic counters for 'rule' within 'p' and stores them into
3492 * '*packet_countp' and '*byte_countp'. The returned statistics include
3493 * statistics for all of 'rule''s facets. */
3495 query_stats(struct ofproto *p, struct rule *rule,
3496 uint64_t *packet_countp, uint64_t *byte_countp)
3498 uint32_t keybuf[ODPUTIL_FLOW_KEY_U32S];
3499 uint64_t packet_count, byte_count;
3500 struct facet *facet;
3503 /* Start from historical data for 'rule' itself that are no longer tracked
3504 * by the datapath. This counts, for example, facets that have expired. */
3505 packet_count = rule->packet_count;
3506 byte_count = rule->byte_count;
3508 /* Ask the datapath for statistics on all of the rule's facets. (We could
3509 * batch up statistics requests using dpif_flow_get_multiple(), but that is
3510 * not yet implemented.)
3512 * Also, add any statistics that are not tracked by the datapath for each
3513 * facet. This includes, for example, statistics for packets that were
3514 * executed "by hand" by ofproto via dpif_execute() but must be accounted
3516 ofpbuf_use_stack(&key, keybuf, sizeof keybuf);
3517 LIST_FOR_EACH (facet, list_node, &rule->facets) {
3518 struct odp_flow odp_flow;
3521 odp_flow_key_from_flow(&key, &facet->flow);
3523 odp_flow.key = key.data;
3524 odp_flow.key_len = key.size;
3525 odp_flow.actions = NULL;
3526 odp_flow.actions_len = 0;
3528 if (!dpif_flow_get(p->dpif, &odp_flow)) {
3529 packet_count += odp_flow.stats.n_packets;
3530 byte_count += odp_flow.stats.n_bytes;
3533 packet_count += facet->packet_count;
3534 byte_count += facet->byte_count;
3537 /* Return the stats to the caller. */
3538 *packet_countp = packet_count;
3539 *byte_countp = byte_count;
3543 calc_flow_duration(long long int start, ovs_be32 *sec, ovs_be32 *nsec)
3545 long long int msecs = time_msec() - start;
3546 *sec = htonl(msecs / 1000);
3547 *nsec = htonl((msecs % 1000) * (1000 * 1000));
3551 put_ofp_flow_stats(struct ofconn *ofconn, struct rule *rule,
3552 ovs_be16 out_port, struct ofpbuf **replyp)
3554 struct ofp_flow_stats *ofs;
3555 uint64_t packet_count, byte_count;
3556 size_t act_len, len;
3558 if (rule_is_hidden(rule) || !rule_has_out_port(rule, out_port)) {
3562 act_len = sizeof *rule->actions * rule->n_actions;
3563 len = offsetof(struct ofp_flow_stats, actions) + act_len;
3565 query_stats(ofconn->ofproto, rule, &packet_count, &byte_count);
3567 ofs = append_ofp_stats_reply(len, ofconn, replyp);
3568 ofs->length = htons(len);
3571 ofputil_cls_rule_to_match(&rule->cr, ofconn->flow_format, &ofs->match,
3572 rule->flow_cookie, &ofs->cookie);
3573 calc_flow_duration(rule->created, &ofs->duration_sec, &ofs->duration_nsec);
3574 ofs->priority = htons(rule->cr.priority);
3575 ofs->idle_timeout = htons(rule->idle_timeout);
3576 ofs->hard_timeout = htons(rule->hard_timeout);
3577 memset(ofs->pad2, 0, sizeof ofs->pad2);
3578 ofs->packet_count = htonll(packet_count);
3579 ofs->byte_count = htonll(byte_count);
3580 if (rule->n_actions > 0) {
3581 memcpy(ofs->actions, rule->actions, act_len);
3586 is_valid_table(uint8_t table_id)
3588 return table_id == 0 || table_id == 0xff;
3592 handle_flow_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
3594 const struct ofp_flow_stats_request *fsr = ofputil_stats_body(oh);
3595 struct ofpbuf *reply;
3597 COVERAGE_INC(ofproto_flows_req);
3598 reply = start_ofp_stats_reply(oh, 1024);
3599 if (is_valid_table(fsr->table_id)) {
3600 struct cls_cursor cursor;
3601 struct cls_rule target;
3604 ofputil_cls_rule_from_match(&fsr->match, 0, NXFF_OPENFLOW10, 0,
3606 cls_cursor_init(&cursor, &ofconn->ofproto->cls, &target);
3607 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3608 put_ofp_flow_stats(ofconn, rule, fsr->out_port, &reply);
3611 queue_tx(reply, ofconn, ofconn->reply_counter);
3617 put_nx_flow_stats(struct ofconn *ofconn, struct rule *rule,
3618 ovs_be16 out_port, struct ofpbuf **replyp)
3620 struct nx_flow_stats *nfs;
3621 uint64_t packet_count, byte_count;
3622 size_t act_len, start_len;
3623 struct ofpbuf *reply;
3625 if (rule_is_hidden(rule) || !rule_has_out_port(rule, out_port)) {
3629 query_stats(ofconn->ofproto, rule, &packet_count, &byte_count);
3631 act_len = sizeof *rule->actions * rule->n_actions;
3633 append_nxstats_reply(sizeof *nfs + NXM_MAX_LEN + act_len, ofconn, replyp);
3634 start_len = (*replyp)->size;
3637 nfs = ofpbuf_put_uninit(reply, sizeof *nfs);
3640 calc_flow_duration(rule->created, &nfs->duration_sec, &nfs->duration_nsec);
3641 nfs->cookie = rule->flow_cookie;
3642 nfs->priority = htons(rule->cr.priority);
3643 nfs->idle_timeout = htons(rule->idle_timeout);
3644 nfs->hard_timeout = htons(rule->hard_timeout);
3645 nfs->match_len = htons(nx_put_match(reply, &rule->cr));
3646 memset(nfs->pad2, 0, sizeof nfs->pad2);
3647 nfs->packet_count = htonll(packet_count);
3648 nfs->byte_count = htonll(byte_count);
3649 if (rule->n_actions > 0) {
3650 ofpbuf_put(reply, rule->actions, act_len);
3652 nfs->length = htons(reply->size - start_len);
3656 handle_nxst_flow(struct ofconn *ofconn, const struct ofp_header *oh)
3658 struct nx_flow_stats_request *nfsr;
3659 struct cls_rule target;
3660 struct ofpbuf *reply;
3664 ofpbuf_use_const(&b, oh, ntohs(oh->length));
3666 /* Dissect the message. */
3667 nfsr = ofpbuf_pull(&b, sizeof *nfsr);
3668 error = nx_pull_match(&b, ntohs(nfsr->match_len), 0, &target);
3673 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3676 COVERAGE_INC(ofproto_flows_req);
3677 reply = start_nxstats_reply(&nfsr->nsm, 1024);
3678 if (is_valid_table(nfsr->table_id)) {
3679 struct cls_cursor cursor;
3682 cls_cursor_init(&cursor, &ofconn->ofproto->cls, &target);
3683 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3684 put_nx_flow_stats(ofconn, rule, nfsr->out_port, &reply);
3687 queue_tx(reply, ofconn, ofconn->reply_counter);
3693 flow_stats_ds(struct ofproto *ofproto, struct rule *rule, struct ds *results)
3695 uint64_t packet_count, byte_count;
3696 size_t act_len = sizeof *rule->actions * rule->n_actions;
3698 query_stats(ofproto, rule, &packet_count, &byte_count);
3700 ds_put_format(results, "duration=%llds, ",
3701 (time_msec() - rule->created) / 1000);
3702 ds_put_format(results, "priority=%u, ", rule->cr.priority);
3703 ds_put_format(results, "n_packets=%"PRIu64", ", packet_count);
3704 ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
3705 cls_rule_format(&rule->cr, results);
3707 ofp_print_actions(results, &rule->actions->header, act_len);
3709 ds_put_cstr(results, "drop");
3711 ds_put_cstr(results, "\n");
3714 /* Adds a pretty-printed description of all flows to 'results', including
3715 * those marked hidden by secchan (e.g., by in-band control). */
3717 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
3719 struct cls_cursor cursor;
3722 cls_cursor_init(&cursor, &p->cls, NULL);
3723 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3724 flow_stats_ds(p, rule, results);
3729 query_aggregate_stats(struct ofproto *ofproto, struct cls_rule *target,
3730 ovs_be16 out_port, uint8_t table_id,
3731 struct ofp_aggregate_stats_reply *oasr)
3733 uint64_t total_packets = 0;
3734 uint64_t total_bytes = 0;
3737 COVERAGE_INC(ofproto_agg_request);
3739 if (is_valid_table(table_id)) {
3740 struct cls_cursor cursor;
3743 cls_cursor_init(&cursor, &ofproto->cls, target);
3744 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
3745 if (!rule_is_hidden(rule) && rule_has_out_port(rule, out_port)) {
3746 uint64_t packet_count;
3747 uint64_t byte_count;
3749 query_stats(ofproto, rule, &packet_count, &byte_count);
3751 total_packets += packet_count;
3752 total_bytes += byte_count;
3758 oasr->flow_count = htonl(n_flows);
3759 oasr->packet_count = htonll(total_packets);
3760 oasr->byte_count = htonll(total_bytes);
3761 memset(oasr->pad, 0, sizeof oasr->pad);
3765 handle_aggregate_stats_request(struct ofconn *ofconn,
3766 const struct ofp_header *oh)
3768 const struct ofp_aggregate_stats_request *request = ofputil_stats_body(oh);
3769 struct ofp_aggregate_stats_reply *reply;
3770 struct cls_rule target;
3773 ofputil_cls_rule_from_match(&request->match, 0, NXFF_OPENFLOW10, 0,
3776 msg = start_ofp_stats_reply(oh, sizeof *reply);
3777 reply = append_ofp_stats_reply(sizeof *reply, ofconn, &msg);
3778 query_aggregate_stats(ofconn->ofproto, &target, request->out_port,
3779 request->table_id, reply);
3780 queue_tx(msg, ofconn, ofconn->reply_counter);
3785 handle_nxst_aggregate(struct ofconn *ofconn, const struct ofp_header *oh)
3787 struct nx_aggregate_stats_request *request;
3788 struct ofp_aggregate_stats_reply *reply;
3789 struct cls_rule target;
3794 ofpbuf_use_const(&b, oh, ntohs(oh->length));
3796 /* Dissect the message. */
3797 request = ofpbuf_pull(&b, sizeof *request);
3798 error = nx_pull_match(&b, ntohs(request->match_len), 0, &target);
3803 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3807 COVERAGE_INC(ofproto_flows_req);
3808 buf = start_nxstats_reply(&request->nsm, sizeof *reply);
3809 reply = ofpbuf_put_uninit(buf, sizeof *reply);
3810 query_aggregate_stats(ofconn->ofproto, &target, request->out_port,
3811 request->table_id, reply);
3812 queue_tx(buf, ofconn, ofconn->reply_counter);
3817 struct queue_stats_cbdata {
3818 struct ofconn *ofconn;
3819 struct ofport *ofport;
3824 put_queue_stats(struct queue_stats_cbdata *cbdata, uint32_t queue_id,
3825 const struct netdev_queue_stats *stats)
3827 struct ofp_queue_stats *reply;
3829 reply = append_ofp_stats_reply(sizeof *reply, cbdata->ofconn, &cbdata->msg);
3830 reply->port_no = htons(cbdata->ofport->opp.port_no);
3831 memset(reply->pad, 0, sizeof reply->pad);
3832 reply->queue_id = htonl(queue_id);
3833 reply->tx_bytes = htonll(stats->tx_bytes);
3834 reply->tx_packets = htonll(stats->tx_packets);
3835 reply->tx_errors = htonll(stats->tx_errors);
3839 handle_queue_stats_dump_cb(uint32_t queue_id,
3840 struct netdev_queue_stats *stats,
3843 struct queue_stats_cbdata *cbdata = cbdata_;
3845 put_queue_stats(cbdata, queue_id, stats);
3849 handle_queue_stats_for_port(struct ofport *port, uint32_t queue_id,
3850 struct queue_stats_cbdata *cbdata)
3852 cbdata->ofport = port;
3853 if (queue_id == OFPQ_ALL) {
3854 netdev_dump_queue_stats(port->netdev,
3855 handle_queue_stats_dump_cb, cbdata);
3857 struct netdev_queue_stats stats;
3859 if (!netdev_get_queue_stats(port->netdev, queue_id, &stats)) {
3860 put_queue_stats(cbdata, queue_id, &stats);
3866 handle_queue_stats_request(struct ofconn *ofconn, const struct ofp_header *oh)
3868 struct ofproto *ofproto = ofconn->ofproto;
3869 const struct ofp_queue_stats_request *qsr;
3870 struct queue_stats_cbdata cbdata;
3871 struct ofport *port;
3872 unsigned int port_no;
3875 qsr = ofputil_stats_body(oh);
3877 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3880 COVERAGE_INC(ofproto_queue_req);
3882 cbdata.ofconn = ofconn;
3883 cbdata.msg = start_ofp_stats_reply(oh, 128);
3885 port_no = ntohs(qsr->port_no);
3886 queue_id = ntohl(qsr->queue_id);
3887 if (port_no == OFPP_ALL) {
3888 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
3889 handle_queue_stats_for_port(port, queue_id, &cbdata);
3891 } else if (port_no < ofproto->max_ports) {
3892 port = get_port(ofproto, ofp_port_to_odp_port(port_no));
3894 handle_queue_stats_for_port(port, queue_id, &cbdata);
3897 ofpbuf_delete(cbdata.msg);
3898 return ofp_mkerr(OFPET_QUEUE_OP_FAILED, OFPQOFC_BAD_PORT);
3900 queue_tx(cbdata.msg, ofconn, ofconn->reply_counter);
3905 static long long int
3906 msec_from_nsec(uint64_t sec, uint32_t nsec)
3908 return !sec ? 0 : sec * 1000 + nsec / 1000000;
3912 facet_update_time(struct ofproto *ofproto, struct facet *facet,
3913 const struct odp_flow_stats *stats)
3915 long long int used = msec_from_nsec(stats->used_sec, stats->used_nsec);
3916 if (used > facet->used) {
3918 if (used > facet->rule->used) {
3919 facet->rule->used = used;
3921 netflow_flow_update_time(ofproto->netflow, &facet->nf_flow, used);
3925 /* Folds the statistics from 'stats' into the counters in 'facet'.
3927 * Because of the meaning of a facet's counters, it only makes sense to do this
3928 * if 'stats' are not tracked in the datapath, that is, if 'stats' represents a
3929 * packet that was sent by hand or if it represents statistics that have been
3930 * cleared out of the datapath. */
3932 facet_update_stats(struct ofproto *ofproto, struct facet *facet,
3933 const struct odp_flow_stats *stats)
3935 if (stats->n_packets) {
3936 facet_update_time(ofproto, facet, stats);
3937 facet->packet_count += stats->n_packets;
3938 facet->byte_count += stats->n_bytes;
3939 netflow_flow_update_flags(&facet->nf_flow, stats->tcp_flags);
3943 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
3944 * in which no matching flow already exists in the flow table.
3946 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
3947 * ofp_actions, to ofconn->ofproto's flow table. Returns 0 on success or an
3948 * OpenFlow error code as encoded by ofp_mkerr() on failure.
3950 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3953 add_flow(struct ofconn *ofconn, struct flow_mod *fm)
3955 struct ofproto *p = ofconn->ofproto;
3956 struct ofpbuf *packet;
3961 if (fm->flags & OFPFF_CHECK_OVERLAP
3962 && classifier_rule_overlaps(&p->cls, &fm->cr)) {
3963 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP);
3967 if (fm->buffer_id != UINT32_MAX) {
3968 error = pktbuf_retrieve(ofconn->pktbuf, fm->buffer_id,
3972 in_port = UINT16_MAX;
3975 rule = rule_create(&fm->cr, fm->actions, fm->n_actions,
3976 fm->idle_timeout, fm->hard_timeout, fm->cookie,
3977 fm->flags & OFPFF_SEND_FLOW_REM);
3978 rule_insert(p, rule);
3980 rule_execute(p, rule, in_port, packet);
3985 static struct rule *
3986 find_flow_strict(struct ofproto *p, const struct flow_mod *fm)
3988 return rule_from_cls_rule(classifier_find_rule_exactly(&p->cls, &fm->cr));
3992 send_buffered_packet(struct ofconn *ofconn,
3993 struct rule *rule, uint32_t buffer_id)
3995 struct ofpbuf *packet;
3999 if (buffer_id == UINT32_MAX) {
4003 error = pktbuf_retrieve(ofconn->pktbuf, buffer_id, &packet, &in_port);
4008 rule_execute(ofconn->ofproto, rule, in_port, packet);
4013 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
4015 struct modify_flows_cbdata {
4016 struct ofproto *ofproto;
4017 const struct flow_mod *fm;
4021 static int modify_flow(struct ofproto *, const struct flow_mod *,
4024 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
4025 * encoded by ofp_mkerr() on failure.
4027 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
4030 modify_flows_loose(struct ofconn *ofconn, struct flow_mod *fm)
4032 struct ofproto *p = ofconn->ofproto;
4033 struct rule *match = NULL;
4034 struct cls_cursor cursor;
4037 cls_cursor_init(&cursor, &p->cls, &fm->cr);
4038 CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
4039 if (!rule_is_hidden(rule)) {
4041 modify_flow(p, fm, rule);
4046 /* This credits the packet to whichever flow happened to match last.
4047 * That's weird. Maybe we should do a lookup for the flow that
4048 * actually matches the packet? Who knows. */
4049 send_buffered_packet(ofconn, match, fm->buffer_id);
4052 return add_flow(ofconn, fm);
4056 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
4057 * code as encoded by ofp_mkerr() on failure.
4059 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
4062 modify_flow_strict(struct ofconn *ofconn, struct flow_mod *fm)
4064 struct ofproto *p = ofconn->ofproto;
4065 struct rule *rule = find_flow_strict(p, fm);
4066 if (rule && !rule_is_hidden(rule)) {
4067 modify_flow(p, fm, rule);
4068 return send_buffered_packet(ofconn, rule, fm->buffer_id);
4070 return add_flow(ofconn, fm);
4074 /* Implements core of OFPFC_MODIFY and OFPFC_MODIFY_STRICT where 'rule' has
4075 * been identified as a flow in 'p''s flow table to be modified, by changing
4076 * the rule's actions to match those in 'ofm' (which is followed by 'n_actions'
4077 * ofp_action[] structures). */
4079 modify_flow(struct ofproto *p, const struct flow_mod *fm, struct rule *rule)
4081 size_t actions_len = fm->n_actions * sizeof *rule->actions;
4083 rule->flow_cookie = fm->cookie;
4085 /* If the actions are the same, do nothing. */
4086 if (fm->n_actions == rule->n_actions
4088 || !memcmp(fm->actions, rule->actions, actions_len))) {
4092 /* Replace actions. */
4093 free(rule->actions);
4094 rule->actions = fm->n_actions ? xmemdup(fm->actions, actions_len) : NULL;
4095 rule->n_actions = fm->n_actions;
4097 p->need_revalidate = true;
4102 /* OFPFC_DELETE implementation. */
4104 static void delete_flow(struct ofproto *, struct rule *, ovs_be16 out_port);
4106 /* Implements OFPFC_DELETE. */
4108 delete_flows_loose(struct ofproto *p, const struct flow_mod *fm)
4110 struct rule *rule, *next_rule;
4111 struct cls_cursor cursor;
4113 cls_cursor_init(&cursor, &p->cls, &fm->cr);
4114 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
4115 delete_flow(p, rule, htons(fm->out_port));
4119 /* Implements OFPFC_DELETE_STRICT. */
4121 delete_flow_strict(struct ofproto *p, struct flow_mod *fm)
4123 struct rule *rule = find_flow_strict(p, fm);
4125 delete_flow(p, rule, htons(fm->out_port));
4129 /* Implements core of OFPFC_DELETE and OFPFC_DELETE_STRICT where 'rule' has
4130 * been identified as a flow to delete from 'p''s flow table, by deleting the
4131 * flow and sending out a OFPT_FLOW_REMOVED message to any interested
4134 * Will not delete 'rule' if it is hidden. Will delete 'rule' only if
4135 * 'out_port' is htons(OFPP_NONE) or if 'rule' actually outputs to the
4136 * specified 'out_port'. */
4138 delete_flow(struct ofproto *p, struct rule *rule, ovs_be16 out_port)
4140 if (rule_is_hidden(rule)) {
4144 if (out_port != htons(OFPP_NONE) && !rule_has_out_port(rule, out_port)) {
4148 rule_send_removed(p, rule, OFPRR_DELETE);
4149 rule_remove(p, rule);
4153 handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh)
4155 struct ofproto *p = ofconn->ofproto;
4159 error = reject_slave_controller(ofconn, "flow_mod");
4164 error = ofputil_decode_flow_mod(&fm, oh, ofconn->flow_format);
4169 /* We do not support the emergency flow cache. It will hopefully get
4170 * dropped from OpenFlow in the near future. */
4171 if (fm.flags & OFPFF_EMERG) {
4172 /* There isn't a good fit for an error code, so just state that the
4173 * flow table is full. */
4174 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
4177 error = validate_actions(fm.actions, fm.n_actions,
4178 &fm.cr.flow, p->max_ports);
4183 switch (fm.command) {
4185 return add_flow(ofconn, &fm);
4188 return modify_flows_loose(ofconn, &fm);
4190 case OFPFC_MODIFY_STRICT:
4191 return modify_flow_strict(ofconn, &fm);
4194 delete_flows_loose(p, &fm);
4197 case OFPFC_DELETE_STRICT:
4198 delete_flow_strict(p, &fm);
4202 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND);
4207 handle_tun_id_from_cookie(struct ofconn *ofconn, const struct ofp_header *oh)
4209 const struct nxt_tun_id_cookie *msg
4210 = (const struct nxt_tun_id_cookie *) oh;
4212 ofconn->flow_format = msg->set ? NXFF_TUN_ID_FROM_COOKIE : NXFF_OPENFLOW10;
4217 handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh)
4219 struct nx_role_request *nrr = (struct nx_role_request *) oh;
4220 struct nx_role_request *reply;
4224 if (ofconn->type != OFCONN_PRIMARY) {
4225 VLOG_WARN_RL(&rl, "ignoring role request on non-controller "
4227 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
4230 role = ntohl(nrr->role);
4231 if (role != NX_ROLE_OTHER && role != NX_ROLE_MASTER
4232 && role != NX_ROLE_SLAVE) {
4233 VLOG_WARN_RL(&rl, "received request for unknown role %"PRIu32, role);
4235 /* There's no good error code for this. */
4236 return ofp_mkerr(OFPET_BAD_REQUEST, -1);
4239 if (role == NX_ROLE_MASTER) {
4240 struct ofconn *other;
4242 HMAP_FOR_EACH (other, hmap_node, &ofconn->ofproto->controllers) {
4243 if (other->role == NX_ROLE_MASTER) {
4244 other->role = NX_ROLE_SLAVE;
4248 ofconn->role = role;
4250 reply = make_nxmsg_xid(sizeof *reply, NXT_ROLE_REPLY, oh->xid, &buf);
4251 reply->role = htonl(role);
4252 queue_tx(buf, ofconn, ofconn->reply_counter);
4258 handle_nxt_set_flow_format(struct ofconn *ofconn, const struct ofp_header *oh)
4260 const struct nxt_set_flow_format *msg
4261 = (const struct nxt_set_flow_format *) oh;
4264 format = ntohl(msg->format);
4265 if (format == NXFF_OPENFLOW10
4266 || format == NXFF_TUN_ID_FROM_COOKIE
4267 || format == NXFF_NXM) {
4268 ofconn->flow_format = format;
4271 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
4276 handle_barrier_request(struct ofconn *ofconn, const struct ofp_header *oh)
4278 struct ofp_header *ob;
4281 /* Currently, everything executes synchronously, so we can just
4282 * immediately send the barrier reply. */
4283 ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
4284 queue_tx(buf, ofconn, ofconn->reply_counter);
4289 handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
4291 const struct ofp_header *oh = msg->data;
4292 const struct ofputil_msg_type *type;
4295 error = ofputil_decode_msg_type(oh, &type);
4300 switch (ofputil_msg_type_code(type)) {
4301 /* OpenFlow requests. */
4302 case OFPUTIL_OFPT_ECHO_REQUEST:
4303 return handle_echo_request(ofconn, oh);
4305 case OFPUTIL_OFPT_FEATURES_REQUEST:
4306 return handle_features_request(ofconn, oh);
4308 case OFPUTIL_OFPT_GET_CONFIG_REQUEST:
4309 return handle_get_config_request(ofconn, oh);
4311 case OFPUTIL_OFPT_SET_CONFIG:
4312 return handle_set_config(ofconn, msg->data);
4314 case OFPUTIL_OFPT_PACKET_OUT:
4315 return handle_packet_out(ofconn, oh);
4317 case OFPUTIL_OFPT_PORT_MOD:
4318 return handle_port_mod(ofconn, oh);
4320 case OFPUTIL_OFPT_FLOW_MOD:
4321 return handle_flow_mod(ofconn, oh);
4323 case OFPUTIL_OFPT_BARRIER_REQUEST:
4324 return handle_barrier_request(ofconn, oh);
4326 /* OpenFlow replies. */
4327 case OFPUTIL_OFPT_ECHO_REPLY:
4330 /* Nicira extension requests. */
4331 case OFPUTIL_NXT_STATUS_REQUEST:
4332 return switch_status_handle_request(
4333 ofconn->ofproto->switch_status, ofconn->rconn, oh);
4335 case OFPUTIL_NXT_TUN_ID_FROM_COOKIE:
4336 return handle_tun_id_from_cookie(ofconn, oh);
4338 case OFPUTIL_NXT_ROLE_REQUEST:
4339 return handle_role_request(ofconn, oh);
4341 case OFPUTIL_NXT_SET_FLOW_FORMAT:
4342 return handle_nxt_set_flow_format(ofconn, oh);
4344 case OFPUTIL_NXT_FLOW_MOD:
4345 return handle_flow_mod(ofconn, oh);
4347 /* OpenFlow statistics requests. */
4348 case OFPUTIL_OFPST_DESC_REQUEST:
4349 return handle_desc_stats_request(ofconn, oh);
4351 case OFPUTIL_OFPST_FLOW_REQUEST:
4352 return handle_flow_stats_request(ofconn, oh);
4354 case OFPUTIL_OFPST_AGGREGATE_REQUEST:
4355 return handle_aggregate_stats_request(ofconn, oh);
4357 case OFPUTIL_OFPST_TABLE_REQUEST:
4358 return handle_table_stats_request(ofconn, oh);
4360 case OFPUTIL_OFPST_PORT_REQUEST:
4361 return handle_port_stats_request(ofconn, oh);
4363 case OFPUTIL_OFPST_QUEUE_REQUEST:
4364 return handle_queue_stats_request(ofconn, oh);
4366 /* Nicira extension statistics requests. */
4367 case OFPUTIL_NXST_FLOW_REQUEST:
4368 return handle_nxst_flow(ofconn, oh);
4370 case OFPUTIL_NXST_AGGREGATE_REQUEST:
4371 return handle_nxst_aggregate(ofconn, oh);
4373 case OFPUTIL_INVALID:
4374 case OFPUTIL_OFPT_HELLO:
4375 case OFPUTIL_OFPT_ERROR:
4376 case OFPUTIL_OFPT_FEATURES_REPLY:
4377 case OFPUTIL_OFPT_GET_CONFIG_REPLY:
4378 case OFPUTIL_OFPT_PACKET_IN:
4379 case OFPUTIL_OFPT_FLOW_REMOVED:
4380 case OFPUTIL_OFPT_PORT_STATUS:
4381 case OFPUTIL_OFPT_BARRIER_REPLY:
4382 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REQUEST:
4383 case OFPUTIL_OFPT_QUEUE_GET_CONFIG_REPLY:
4384 case OFPUTIL_OFPST_DESC_REPLY:
4385 case OFPUTIL_OFPST_FLOW_REPLY:
4386 case OFPUTIL_OFPST_QUEUE_REPLY:
4387 case OFPUTIL_OFPST_PORT_REPLY:
4388 case OFPUTIL_OFPST_TABLE_REPLY:
4389 case OFPUTIL_OFPST_AGGREGATE_REPLY:
4390 case OFPUTIL_NXT_STATUS_REPLY:
4391 case OFPUTIL_NXT_ROLE_REPLY:
4392 case OFPUTIL_NXT_FLOW_REMOVED:
4393 case OFPUTIL_NXST_FLOW_REPLY:
4394 case OFPUTIL_NXST_AGGREGATE_REPLY:
4396 if (VLOG_IS_WARN_ENABLED()) {
4397 char *s = ofp_to_string(oh, ntohs(oh->length), 2);
4398 VLOG_DBG_RL(&rl, "OpenFlow message ignored: %s", s);
4401 if (oh->type == OFPT_STATS_REQUEST || oh->type == OFPT_STATS_REPLY) {
4402 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT);
4404 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
4410 handle_openflow(struct ofconn *ofconn, struct ofpbuf *ofp_msg)
4412 int error = handle_openflow__(ofconn, ofp_msg);
4414 send_error_oh(ofconn, ofp_msg->data, error);
4416 COVERAGE_INC(ofproto_recv_openflow);
4420 handle_miss_upcall(struct ofproto *p, struct dpif_upcall *upcall)
4422 struct facet *facet;
4425 /* Obtain in_port and tun_id, at least. */
4426 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
4428 /* Set header pointers in 'flow'. */
4429 flow_extract(upcall->packet, flow.tun_id, flow.in_port, &flow);
4431 /* Check with in-band control to see if this packet should be sent
4432 * to the local port regardless of the flow table. */
4433 if (in_band_msg_in_hook(p->in_band, &flow, upcall->packet)) {
4434 struct ofpbuf odp_actions;
4436 ofpbuf_init(&odp_actions, 32);
4437 nl_msg_put_u32(&odp_actions, ODPAT_OUTPUT, ODPP_LOCAL);
4438 dpif_execute(p->dpif, odp_actions.data, odp_actions.size,
4440 ofpbuf_uninit(&odp_actions);
4443 facet = facet_lookup_valid(p, &flow);
4445 struct rule *rule = rule_lookup(p, &flow);
4447 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
4448 struct ofport *port = get_port(p, flow.in_port);
4450 if (port->opp.config & OFPPC_NO_PACKET_IN) {
4451 COVERAGE_INC(ofproto_no_packet_in);
4452 /* XXX install 'drop' flow entry */
4453 ofpbuf_delete(upcall->packet);
4457 VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16,
4461 COVERAGE_INC(ofproto_packet_in);
4462 send_packet_in(p, upcall, &flow, false);
4466 facet = facet_create(p, rule, &flow, upcall->packet);
4467 } else if (!facet->may_install) {
4468 /* The facet is not installable, that is, we need to process every
4469 * packet, so process the current packet's actions into 'facet'. */
4470 facet_make_actions(p, facet, upcall->packet);
4473 if (facet->rule->cr.priority == FAIL_OPEN_PRIORITY) {
4475 * Extra-special case for fail-open mode.
4477 * We are in fail-open mode and the packet matched the fail-open rule,
4478 * but we are connected to a controller too. We should send the packet
4479 * up to the controller in the hope that it will try to set up a flow
4480 * and thereby allow us to exit fail-open.
4482 * See the top-level comment in fail-open.c for more information.
4484 send_packet_in(p, upcall, &flow, true);
4487 facet_execute(p, facet, upcall->packet);
4488 facet_install(p, facet, false);
4492 handle_upcall(struct ofproto *p, struct dpif_upcall *upcall)
4496 switch (upcall->type) {
4497 case _ODPL_ACTION_NR:
4498 COVERAGE_INC(ofproto_ctlr_action);
4499 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
4500 send_packet_in(p, upcall, &flow, false);
4503 case _ODPL_SFLOW_NR:
4505 odp_flow_key_to_flow(upcall->key, upcall->key_len, &flow);
4506 ofproto_sflow_received(p->sflow, upcall, &flow);
4508 ofpbuf_delete(upcall->packet);
4512 handle_miss_upcall(p, upcall);
4516 VLOG_WARN_RL(&rl, "upcall has unexpected type %"PRIu32, upcall->type);
4521 /* Flow expiration. */
4523 static int ofproto_dp_max_idle(const struct ofproto *);
4524 static void ofproto_update_used(struct ofproto *);
4525 static void rule_expire(struct ofproto *, struct rule *);
4526 static void ofproto_expire_facets(struct ofproto *, int dp_max_idle);
4528 /* This function is called periodically by ofproto_run(). Its job is to
4529 * collect updates for the flows that have been installed into the datapath,
4530 * most importantly when they last were used, and then use that information to
4531 * expire flows that have not been used recently.
4533 * Returns the number of milliseconds after which it should be called again. */
4535 ofproto_expire(struct ofproto *ofproto)
4537 struct rule *rule, *next_rule;
4538 struct cls_cursor cursor;
4541 /* Update 'used' for each flow in the datapath. */
4542 ofproto_update_used(ofproto);
4544 /* Expire facets that have been idle too long. */
4545 dp_max_idle = ofproto_dp_max_idle(ofproto);
4546 ofproto_expire_facets(ofproto, dp_max_idle);
4548 /* Expire OpenFlow flows whose idle_timeout or hard_timeout has passed. */
4549 cls_cursor_init(&cursor, &ofproto->cls, NULL);
4550 CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
4551 rule_expire(ofproto, rule);
4554 /* Let the hook know that we're at a stable point: all outstanding data
4555 * in existing flows has been accounted to the account_cb. Thus, the
4556 * hook can now reasonably do operations that depend on having accurate
4557 * flow volume accounting (currently, that's just bond rebalancing). */
4558 if (ofproto->ofhooks->account_checkpoint_cb) {
4559 ofproto->ofhooks->account_checkpoint_cb(ofproto->aux);
4562 return MIN(dp_max_idle, 1000);
4565 /* Update 'used' member of installed facets. */
4567 ofproto_update_used(struct ofproto *p)
4569 struct dpif_flow_dump dump;
4571 dpif_flow_dump_start(&dump, p->dpif);
4573 uint32_t keybuf[ODPUTIL_FLOW_KEY_U32S];
4574 struct facet *facet;
4578 memset(&f, 0, sizeof f);
4579 f.key = (struct nlattr *) keybuf;
4580 f.key_len = sizeof keybuf;
4581 if (!dpif_flow_dump_next(&dump, &f)) {
4585 if (f.key_len > sizeof keybuf) {
4586 VLOG_WARN_RL(&rl, "ODP flow key overflowed buffer");
4589 if (odp_flow_key_to_flow(f.key, f.key_len, &flow)) {
4593 odp_flow_key_format(f.key, f.key_len, &s);
4594 VLOG_WARN_RL(&rl, "failed to convert ODP flow key to flow: %s",
4600 facet = facet_find(p, &flow);
4602 if (facet && facet->installed) {
4603 facet_update_time(p, facet, &f.stats);
4604 facet_account(p, facet, f.stats.n_bytes);
4606 /* There's a flow in the datapath that we know nothing about.
4608 COVERAGE_INC(ofproto_unexpected_rule);
4609 dpif_flow_del(p->dpif, &f);
4612 dpif_flow_dump_done(&dump);
4615 /* Calculates and returns the number of milliseconds of idle time after which
4616 * facets should expire from the datapath and we should fold their statistics
4617 * into their parent rules in userspace. */
4619 ofproto_dp_max_idle(const struct ofproto *ofproto)
4622 * Idle time histogram.
4624 * Most of the time a switch has a relatively small number of facets. When
4625 * this is the case we might as well keep statistics for all of them in
4626 * userspace and to cache them in the kernel datapath for performance as
4629 * As the number of facets increases, the memory required to maintain
4630 * statistics about them in userspace and in the kernel becomes
4631 * significant. However, with a large number of facets it is likely that
4632 * only a few of them are "heavy hitters" that consume a large amount of
4633 * bandwidth. At this point, only heavy hitters are worth caching in the
4634 * kernel and maintaining in userspaces; other facets we can discard.
4636 * The technique used to compute the idle time is to build a histogram with
4637 * N_BUCKETS buckets whose width is BUCKET_WIDTH msecs each. Each facet
4638 * that is installed in the kernel gets dropped in the appropriate bucket.
4639 * After the histogram has been built, we compute the cutoff so that only
4640 * the most-recently-used 1% of facets (but at least 1000 flows) are kept
4641 * cached. At least the most-recently-used bucket of facets is kept, so
4642 * actually an arbitrary number of facets can be kept in any given
4643 * expiration run (though the next run will delete most of those unless
4644 * they receive additional data).
4646 * This requires a second pass through the facets, in addition to the pass
4647 * made by ofproto_update_used(), because the former function never looks
4648 * at uninstallable facets.
4650 enum { BUCKET_WIDTH = ROUND_UP(100, TIME_UPDATE_INTERVAL) };
4651 enum { N_BUCKETS = 5000 / BUCKET_WIDTH };
4652 int buckets[N_BUCKETS] = { 0 };
4653 struct facet *facet;
4658 total = hmap_count(&ofproto->facets);
4659 if (total <= 1000) {
4660 return N_BUCKETS * BUCKET_WIDTH;
4663 /* Build histogram. */
4665 HMAP_FOR_EACH (facet, hmap_node, &ofproto->facets) {
4666 long long int idle = now - facet->used;
4667 int bucket = (idle <= 0 ? 0
4668 : idle >= BUCKET_WIDTH * N_BUCKETS ? N_BUCKETS - 1
4669 : (unsigned int) idle / BUCKET_WIDTH);
4673 /* Find the first bucket whose flows should be expired. */
4674 for (bucket = 0; bucket < N_BUCKETS; bucket++) {
4675 if (buckets[bucket]) {
4678 subtotal += buckets[bucket++];
4679 } while (bucket < N_BUCKETS && subtotal < MAX(1000, total / 100));
4684 if (VLOG_IS_DBG_ENABLED()) {
4688 ds_put_cstr(&s, "keep");
4689 for (i = 0; i < N_BUCKETS; i++) {
4691 ds_put_cstr(&s, ", drop");
4694 ds_put_format(&s, " %d:%d", i * BUCKET_WIDTH, buckets[i]);
4697 VLOG_INFO("%s: %s (msec:count)",
4698 dpif_name(ofproto->dpif), ds_cstr(&s));
4702 return bucket * BUCKET_WIDTH;
4706 facet_active_timeout(struct ofproto *ofproto, struct facet *facet)
4708 if (ofproto->netflow && !facet_is_controller_flow(facet) &&
4709 netflow_active_timeout_expired(ofproto->netflow, &facet->nf_flow)) {
4710 struct ofexpired expired;
4711 struct odp_flow odp_flow;
4713 /* Get updated flow stats.
4715 * XXX We could avoid this call entirely if (1) ofproto_update_used()
4716 * updated TCP flags and (2) the dpif_flow_list_all() in
4717 * ofproto_update_used() zeroed TCP flags. */
4718 memset(&odp_flow, 0, sizeof odp_flow);
4719 if (facet->installed) {
4720 uint32_t keybuf[ODPUTIL_FLOW_KEY_U32S];
4723 ofpbuf_use_stack(&key, keybuf, sizeof keybuf);
4724 odp_flow_key_from_flow(&key, &facet->flow);
4726 odp_flow.key = key.data;
4727 odp_flow.key_len = key.size;
4728 odp_flow.flags = ODPFF_ZERO_TCP_FLAGS;
4729 dpif_flow_get(ofproto->dpif, &odp_flow);
4731 if (odp_flow.stats.n_packets) {
4732 facet_update_time(ofproto, facet, &odp_flow.stats);
4733 netflow_flow_update_flags(&facet->nf_flow,
4734 odp_flow.stats.tcp_flags);
4738 expired.flow = facet->flow;
4739 expired.packet_count = facet->packet_count +
4740 odp_flow.stats.n_packets;
4741 expired.byte_count = facet->byte_count + odp_flow.stats.n_bytes;
4742 expired.used = facet->used;
4744 netflow_expire(ofproto->netflow, &facet->nf_flow, &expired);
4749 ofproto_expire_facets(struct ofproto *ofproto, int dp_max_idle)
4751 long long int cutoff = time_msec() - dp_max_idle;
4752 struct facet *facet, *next_facet;
4754 HMAP_FOR_EACH_SAFE (facet, next_facet, hmap_node, &ofproto->facets) {
4755 facet_active_timeout(ofproto, facet);
4756 if (facet->used < cutoff) {
4757 facet_remove(ofproto, facet);
4762 /* If 'rule' is an OpenFlow rule, that has expired according to OpenFlow rules,
4763 * then delete it entirely. */
4765 rule_expire(struct ofproto *ofproto, struct rule *rule)
4767 struct facet *facet, *next_facet;
4771 /* Has 'rule' expired? */
4773 if (rule->hard_timeout
4774 && now > rule->created + rule->hard_timeout * 1000) {
4775 reason = OFPRR_HARD_TIMEOUT;
4776 } else if (rule->idle_timeout && list_is_empty(&rule->facets)
4777 && now >rule->used + rule->idle_timeout * 1000) {
4778 reason = OFPRR_IDLE_TIMEOUT;
4783 COVERAGE_INC(ofproto_expired);
4785 /* Update stats. (This is a no-op if the rule expired due to an idle
4786 * timeout, because that only happens when the rule has no facets left.) */
4787 LIST_FOR_EACH_SAFE (facet, next_facet, list_node, &rule->facets) {
4788 facet_remove(ofproto, facet);
4791 /* Get rid of the rule. */
4792 if (!rule_is_hidden(rule)) {
4793 rule_send_removed(ofproto, rule, reason);
4795 rule_remove(ofproto, rule);
4798 static struct ofpbuf *
4799 compose_ofp_flow_removed(struct ofconn *ofconn, const struct rule *rule,
4802 struct ofp_flow_removed *ofr;
4805 ofr = make_openflow_xid(sizeof *ofr, OFPT_FLOW_REMOVED, htonl(0), &buf);
4806 ofputil_cls_rule_to_match(&rule->cr, ofconn->flow_format, &ofr->match,
4807 rule->flow_cookie, &ofr->cookie);
4808 ofr->priority = htons(rule->cr.priority);
4809 ofr->reason = reason;
4810 calc_flow_duration(rule->created, &ofr->duration_sec, &ofr->duration_nsec);
4811 ofr->idle_timeout = htons(rule->idle_timeout);
4812 ofr->packet_count = htonll(rule->packet_count);
4813 ofr->byte_count = htonll(rule->byte_count);
4818 static struct ofpbuf *
4819 compose_nx_flow_removed(const struct rule *rule, uint8_t reason)
4821 struct nx_flow_removed *nfr;
4825 make_nxmsg_xid(sizeof *nfr, NXT_FLOW_REMOVED, htonl(0), &buf);
4826 match_len = nx_put_match(buf, &rule->cr);
4829 nfr->cookie = rule->flow_cookie;
4830 nfr->priority = htons(rule->cr.priority);
4831 nfr->reason = reason;
4832 calc_flow_duration(rule->created, &nfr->duration_sec, &nfr->duration_nsec);
4833 nfr->idle_timeout = htons(rule->idle_timeout);
4834 nfr->match_len = htons(match_len);
4835 nfr->packet_count = htonll(rule->packet_count);
4836 nfr->byte_count = htonll(rule->byte_count);
4842 rule_send_removed(struct ofproto *p, struct rule *rule, uint8_t reason)
4844 struct ofconn *ofconn;
4846 if (!rule->send_flow_removed) {
4850 LIST_FOR_EACH (ofconn, node, &p->all_conns) {
4853 if (!rconn_is_connected(ofconn->rconn)
4854 || !ofconn_receives_async_msgs(ofconn)) {
4858 msg = (ofconn->flow_format == NXFF_NXM
4859 ? compose_nx_flow_removed(rule, reason)
4860 : compose_ofp_flow_removed(ofconn, rule, reason));
4862 /* Account flow expirations under ofconn->reply_counter, the counter
4863 * for replies to OpenFlow requests. That works because preventing
4864 * OpenFlow requests from being processed also prevents new flows from
4865 * being added (and expiring). (It also prevents processing OpenFlow
4866 * requests that would not add new flows, so it is imperfect.) */
4867 queue_tx(msg, ofconn, ofconn->reply_counter);
4871 /* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */
4873 do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_)
4875 struct ofconn *ofconn = ofconn_;
4877 rconn_send_with_limit(ofconn->rconn, ofp_packet_in,
4878 ofconn->packet_in_counter, 100);
4881 /* Takes 'upcall', whose packet has the flow specified by 'flow', composes an
4882 * OpenFlow packet-in message from it, and passes it to 'ofconn''s packet
4883 * scheduler for sending.
4885 * If 'clone' is true, the caller retains ownership of 'upcall->packet'.
4886 * Otherwise, ownership is transferred to this function. */
4888 schedule_packet_in(struct ofconn *ofconn, struct dpif_upcall *upcall,
4889 const struct flow *flow, bool clone)
4891 enum { OPI_SIZE = offsetof(struct ofp_packet_in, data) };
4892 struct ofproto *ofproto = ofconn->ofproto;
4893 struct ofp_packet_in *opi;
4894 int total_len, send_len;
4895 struct ofpbuf *packet;
4898 /* Get OpenFlow buffer_id. */
4899 if (upcall->type == _ODPL_ACTION_NR) {
4900 buffer_id = UINT32_MAX;
4901 } else if (ofproto->fail_open && fail_open_is_active(ofproto->fail_open)) {
4902 buffer_id = pktbuf_get_null();
4903 } else if (!ofconn->pktbuf) {
4904 buffer_id = UINT32_MAX;
4906 buffer_id = pktbuf_save(ofconn->pktbuf, upcall->packet, flow->in_port);
4909 /* Figure out how much of the packet to send. */
4910 total_len = send_len = upcall->packet->size;
4911 if (buffer_id != UINT32_MAX) {
4912 send_len = MIN(send_len, ofconn->miss_send_len);
4914 if (upcall->type == _ODPL_ACTION_NR) {
4915 send_len = MIN(send_len, upcall->userdata);
4918 /* Copy or steal buffer for OFPT_PACKET_IN. */
4920 packet = ofpbuf_clone_data_with_headroom(upcall->packet->data,
4921 send_len, OPI_SIZE);
4923 packet = upcall->packet;
4924 packet->size = send_len;
4927 /* Add OFPT_PACKET_IN. */
4928 opi = ofpbuf_push_zeros(packet, OPI_SIZE);
4929 opi->header.version = OFP_VERSION;
4930 opi->header.type = OFPT_PACKET_IN;
4931 opi->total_len = htons(total_len);
4932 opi->in_port = htons(odp_port_to_ofp_port(flow->in_port));
4933 opi->reason = upcall->type == _ODPL_MISS_NR ? OFPR_NO_MATCH : OFPR_ACTION;
4934 opi->buffer_id = htonl(buffer_id);
4935 update_openflow_length(packet);
4937 /* Hand over to packet scheduler. It might immediately call into
4938 * do_send_packet_in() or it might buffer it for a while (until a later
4939 * call to pinsched_run()). */
4940 pinsched_send(ofconn->schedulers[opi->reason], flow->in_port,
4941 packet, do_send_packet_in, ofconn);
4944 /* Given 'upcall', of type _ODPL_ACTION_NR or _ODPL_MISS_NR, sends an
4945 * OFPT_PACKET_IN message to each OpenFlow controller as necessary according to
4946 * their individual configurations.
4948 * Takes ownership of 'packet'. */
4950 send_packet_in(struct ofproto *ofproto, struct dpif_upcall *upcall,
4951 const struct flow *flow, bool clone)
4953 struct ofconn *ofconn, *prev;
4956 LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
4957 if (ofconn_receives_async_msgs(ofconn)) {
4959 schedule_packet_in(prev, upcall, flow, true);
4965 schedule_packet_in(prev, upcall, flow, clone);
4966 } else if (!clone) {
4967 ofpbuf_delete(upcall->packet);
4972 pick_datapath_id(const struct ofproto *ofproto)
4974 const struct ofport *port;
4976 port = get_port(ofproto, ODPP_LOCAL);
4978 uint8_t ea[ETH_ADDR_LEN];
4981 error = netdev_get_etheraddr(port->netdev, ea);
4983 return eth_addr_to_uint64(ea);
4985 VLOG_WARN("could not get MAC address for %s (%s)",
4986 netdev_get_name(port->netdev), strerror(error));
4988 return ofproto->fallback_dpid;
4992 pick_fallback_dpid(void)
4994 uint8_t ea[ETH_ADDR_LEN];
4995 eth_addr_nicira_random(ea);
4996 return eth_addr_to_uint64(ea);
5000 ofproto_unixctl_list(struct unixctl_conn *conn, const char *arg OVS_UNUSED,
5001 void *aux OVS_UNUSED)
5003 const struct shash_node *node;
5007 SHASH_FOR_EACH (node, &all_ofprotos) {
5008 ds_put_format(&results, "%s\n", node->name);
5010 unixctl_command_reply(conn, 200, ds_cstr(&results));
5011 ds_destroy(&results);
5014 struct ofproto_trace {
5015 struct action_xlate_ctx ctx;
5021 trace_format_rule(struct ds *result, int level, const struct rule *rule)
5023 ds_put_char_multiple(result, '\t', level);
5025 ds_put_cstr(result, "No match\n");
5029 ds_put_format(result, "Rule: cookie=%#"PRIx64" ",
5030 ntohll(rule->flow_cookie));
5031 cls_rule_format(&rule->cr, result);
5032 ds_put_char(result, '\n');
5034 ds_put_char_multiple(result, '\t', level);
5035 ds_put_cstr(result, "OpenFlow ");
5036 ofp_print_actions(result, (const struct ofp_action_header *) rule->actions,
5037 rule->n_actions * sizeof *rule->actions);
5038 ds_put_char(result, '\n');
5042 trace_format_flow(struct ds *result, int level, const char *title,
5043 struct ofproto_trace *trace)
5045 ds_put_char_multiple(result, '\t', level);
5046 ds_put_format(result, "%s: ", title);
5047 if (flow_equal(&trace->ctx.flow, &trace->flow)) {
5048 ds_put_cstr(result, "unchanged");
5050 flow_format(result, &trace->ctx.flow);
5051 trace->flow = trace->ctx.flow;
5053 ds_put_char(result, '\n');
5057 trace_resubmit(struct action_xlate_ctx *ctx, const struct rule *rule)
5059 struct ofproto_trace *trace = CONTAINER_OF(ctx, struct ofproto_trace, ctx);
5060 struct ds *result = trace->result;
5062 ds_put_char(result, '\n');
5063 trace_format_flow(result, ctx->recurse + 1, "Resubmitted flow", trace);
5064 trace_format_rule(result, ctx->recurse + 1, rule);
5068 ofproto_unixctl_trace(struct unixctl_conn *conn, const char *args_,
5069 void *aux OVS_UNUSED)
5071 char *dpname, *in_port_s, *tun_id_s, *packet_s;
5072 char *args = xstrdup(args_);
5073 char *save_ptr = NULL;
5074 struct ofproto *ofproto;
5075 struct ofpbuf packet;
5083 ofpbuf_init(&packet, strlen(args) / 2);
5086 dpname = strtok_r(args, " ", &save_ptr);
5087 tun_id_s = strtok_r(NULL, " ", &save_ptr);
5088 in_port_s = strtok_r(NULL, " ", &save_ptr);
5089 packet_s = strtok_r(NULL, "", &save_ptr); /* Get entire rest of line. */
5090 if (!dpname || !in_port_s || !packet_s) {
5091 unixctl_command_reply(conn, 501, "Bad command syntax");
5095 ofproto = shash_find_data(&all_ofprotos, dpname);
5097 unixctl_command_reply(conn, 501, "Unknown ofproto (use ofproto/list "
5102 tun_id = htonll(strtoull(tun_id_s, NULL, 10));
5103 in_port = ofp_port_to_odp_port(atoi(in_port_s));
5105 packet_s = ofpbuf_put_hex(&packet, packet_s, NULL);
5106 packet_s += strspn(packet_s, " ");
5107 if (*packet_s != '\0') {
5108 unixctl_command_reply(conn, 501, "Trailing garbage in command");
5111 if (packet.size < ETH_HEADER_LEN) {
5112 unixctl_command_reply(conn, 501, "Packet data too short for Ethernet");
5116 ds_put_cstr(&result, "Packet: ");
5117 s = ofp_packet_to_string(packet.data, packet.size, packet.size);
5118 ds_put_cstr(&result, s);
5121 flow_extract(&packet, tun_id, in_port, &flow);
5122 ds_put_cstr(&result, "Flow: ");
5123 flow_format(&result, &flow);
5124 ds_put_char(&result, '\n');
5126 rule = rule_lookup(ofproto, &flow);
5127 trace_format_rule(&result, 0, rule);
5129 struct ofproto_trace trace;
5130 struct ofpbuf *odp_actions;
5132 trace.result = &result;
5134 action_xlate_ctx_init(&trace.ctx, ofproto, &flow, &packet);
5135 trace.ctx.resubmit_hook = trace_resubmit;
5136 odp_actions = xlate_actions(&trace.ctx,
5137 rule->actions, rule->n_actions);
5139 ds_put_char(&result, '\n');
5140 trace_format_flow(&result, 0, "Final flow", &trace);
5141 ds_put_cstr(&result, "Datapath actions: ");
5142 format_odp_actions(&result, odp_actions->data, odp_actions->size);
5143 ofpbuf_delete(odp_actions);
5146 unixctl_command_reply(conn, 200, ds_cstr(&result));
5149 ds_destroy(&result);
5150 ofpbuf_uninit(&packet);
5155 ofproto_unixctl_init(void)
5157 static bool registered;
5163 unixctl_command_register("ofproto/list", ofproto_unixctl_list, NULL);
5164 unixctl_command_register("ofproto/trace", ofproto_unixctl_trace, NULL);
5168 default_normal_ofhook_cb(const struct flow *flow, const struct ofpbuf *packet,
5169 struct ofpbuf *odp_actions, tag_type *tags,
5170 uint16_t *nf_output_iface, void *ofproto_)
5172 struct ofproto *ofproto = ofproto_;
5175 /* Drop frames for reserved multicast addresses. */
5176 if (eth_addr_is_reserved(flow->dl_dst)) {
5180 /* Learn source MAC (but don't try to learn from revalidation). */
5181 if (packet != NULL) {
5182 tag_type rev_tag = mac_learning_learn(ofproto->ml, flow->dl_src,
5184 GRAT_ARP_LOCK_NONE);
5186 /* The log messages here could actually be useful in debugging,
5187 * so keep the rate limit relatively high. */
5188 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
5189 VLOG_DBG_RL(&rl, "learned that "ETH_ADDR_FMT" is on port %"PRIu16,
5190 ETH_ADDR_ARGS(flow->dl_src), flow->in_port);
5191 ofproto_revalidate(ofproto, rev_tag);
5195 /* Determine output port. */
5196 out_port = mac_learning_lookup_tag(ofproto->ml, flow->dl_dst, 0, tags,
5199 flood_packets(ofproto, flow->in_port, OFPPC_NO_FLOOD,
5200 nf_output_iface, odp_actions);
5201 } else if (out_port != flow->in_port) {
5202 nl_msg_put_u32(odp_actions, ODPAT_OUTPUT, out_port);
5203 *nf_output_iface = out_port;
5211 static const struct ofhooks default_ofhooks = {
5212 default_normal_ofhook_cb,