2 * Copyright (c) 2009, 2010 Nicira Networks.
3 * Copyright (c) 2010 Jean Tourrilhes - HP-Labs.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
22 #include <sys/socket.h>
24 #include <netinet/in.h>
27 #include "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"
41 #include "ofp-print.h"
43 #include "ofproto-sflow.h"
45 #include "openflow/nicira-ext.h"
46 #include "openflow/openflow.h"
47 #include "openvswitch/datapath-protocol.h"
51 #include "poll-loop.h"
55 #include "stream-ssl.h"
63 VLOG_DEFINE_THIS_MODULE(ofproto);
65 #include "sflow_api.h"
68 struct hmap_node hmap_node; /* In struct ofproto's "ports" hmap. */
69 struct netdev *netdev;
70 struct ofp_phy_port opp; /* In host byte order. */
74 static void ofport_free(struct ofport *);
75 static void hton_ofp_phy_port(struct ofp_phy_port *);
77 static int xlate_actions(const union ofp_action *in, size_t n_in,
78 const struct flow *, struct ofproto *,
79 const struct ofpbuf *packet,
80 struct odp_actions *out, tag_type *tags,
81 bool *may_set_up_flow, uint16_t *nf_output_iface);
86 ovs_be64 flow_cookie; /* Controller-issued identifier. */
87 uint16_t idle_timeout; /* In seconds from time of last use. */
88 uint16_t hard_timeout; /* In seconds from time of creation. */
89 bool send_flow_removed; /* Send a flow removed message? */
90 long long int used; /* Last-used time (0 if never used). */
91 long long int created; /* Creation time. */
92 uint64_t packet_count; /* Number of packets received. */
93 uint64_t byte_count; /* Number of bytes received. */
94 uint64_t accounted_bytes; /* Number of bytes passed to account_cb. */
95 tag_type tags; /* Tags (set only by hooks). */
96 struct netflow_flow nf_flow; /* Per-flow NetFlow tracking data. */
98 /* If 'super' is non-NULL, this rule is a subrule, that is, it is an
99 * exact-match rule (having cr.wc.wildcards of 0) generated from the
100 * wildcard rule 'super'. In this case, 'list' is an element of the
103 * If 'super' is NULL, this rule is a super-rule, and 'list' is the head of
104 * a list of subrules. A super-rule with no wildcards (where
105 * cr.wc.wildcards is 0) will never have any subrules. */
111 * 'n_actions' is the number of elements in the 'actions' array. A single
112 * action may take up more more than one element's worth of space.
114 * A subrule has no actions (it uses the super-rule's actions). */
116 union ofp_action *actions;
120 * A super-rule with wildcard fields never has ODP actions (since the
121 * datapath only supports exact-match flows). */
122 bool installed; /* Installed in datapath? */
123 bool may_install; /* True ordinarily; false if actions must
124 * be reassessed for every packet. */
126 union odp_action *odp_actions;
130 rule_is_hidden(const struct rule *rule)
132 /* Subrules are merely an implementation detail, so hide them from the
134 if (rule->super != NULL) {
138 /* Rules with priority higher than UINT16_MAX are set up by ofproto itself
139 * (e.g. by in-band control) and are intentionally hidden from the
141 if (rule->cr.priority > UINT16_MAX) {
148 static struct rule *rule_create(struct ofproto *, struct rule *super,
149 const union ofp_action *, size_t n_actions,
150 uint16_t idle_timeout, uint16_t hard_timeout,
151 ovs_be64 flow_cookie, bool send_flow_removed);
152 static void rule_free(struct rule *);
153 static void rule_destroy(struct ofproto *, struct rule *);
154 static struct rule *rule_from_cls_rule(const struct cls_rule *);
155 static void rule_insert(struct ofproto *, struct rule *,
156 struct ofpbuf *packet, uint16_t in_port);
157 static void rule_remove(struct ofproto *, struct rule *);
158 static bool rule_make_actions(struct ofproto *, struct rule *,
159 const struct ofpbuf *packet);
160 static void rule_install(struct ofproto *, struct rule *,
161 struct rule *displaced_rule);
162 static void rule_uninstall(struct ofproto *, struct rule *);
163 static void rule_post_uninstall(struct ofproto *, struct rule *);
164 static void send_flow_removed(struct ofproto *, struct rule *, uint8_t reason);
166 /* ofproto supports two kinds of OpenFlow connections:
168 * - "Primary" connections to ordinary OpenFlow controllers. ofproto
169 * maintains persistent connections to these controllers and by default
170 * sends them asynchronous messages such as packet-ins.
172 * - "Service" connections, e.g. from ovs-ofctl. When these connections
173 * drop, it is the other side's responsibility to reconnect them if
174 * necessary. ofproto does not send them asynchronous messages by default.
176 * Currently, active (tcp, ssl, unix) connections are always "primary"
177 * connections and passive (ptcp, pssl, punix) connections are always "service"
178 * connections. There is no inherent reason for this, but it reflects the
182 OFCONN_PRIMARY, /* An ordinary OpenFlow controller. */
183 OFCONN_SERVICE /* A service connection, e.g. "ovs-ofctl". */
186 /* A listener for incoming OpenFlow "service" connections. */
188 struct hmap_node node; /* In struct ofproto's "services" hmap. */
189 struct pvconn *pvconn; /* OpenFlow connection listener. */
191 /* These are not used by ofservice directly. They are settings for
192 * accepted "struct ofconn"s from the pvconn. */
193 int probe_interval; /* Max idle time before probing, in seconds. */
194 int rate_limit; /* Max packet-in rate in packets per second. */
195 int burst_limit; /* Limit on accumulating packet credits. */
198 static struct ofservice *ofservice_lookup(struct ofproto *,
200 static int ofservice_create(struct ofproto *,
201 const struct ofproto_controller *);
202 static void ofservice_reconfigure(struct ofservice *,
203 const struct ofproto_controller *);
204 static void ofservice_destroy(struct ofproto *, struct ofservice *);
206 /* An OpenFlow connection. */
208 struct ofproto *ofproto; /* The ofproto that owns this connection. */
209 struct list node; /* In struct ofproto's "all_conns" list. */
210 struct rconn *rconn; /* OpenFlow connection. */
211 enum ofconn_type type; /* Type. */
212 int flow_format; /* One of NXFF_*. */
214 /* OFPT_PACKET_IN related data. */
215 struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */
216 struct pinsched *schedulers[2]; /* Indexed by reason code; see below. */
217 struct pktbuf *pktbuf; /* OpenFlow packet buffers. */
218 int miss_send_len; /* Bytes to send of buffered packets. */
220 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
221 * requests, and the maximum number before we stop reading OpenFlow
223 #define OFCONN_REPLY_MAX 100
224 struct rconn_packet_counter *reply_counter;
226 /* type == OFCONN_PRIMARY only. */
227 enum nx_role role; /* Role. */
228 struct hmap_node hmap_node; /* In struct ofproto's "controllers" map. */
229 struct discovery *discovery; /* Controller discovery object, if enabled. */
230 struct status_category *ss; /* Switch status category. */
231 enum ofproto_band band; /* In-band or out-of-band? */
234 /* We use OFPR_NO_MATCH and OFPR_ACTION as indexes into struct ofconn's
235 * "schedulers" array. Their values are 0 and 1, and their meanings and values
236 * coincide with _ODPL_MISS_NR and _ODPL_ACTION_NR, so this is convenient. In
237 * case anything ever changes, check their values here. */
238 #define N_SCHEDULERS 2
239 BUILD_ASSERT_DECL(OFPR_NO_MATCH == 0);
240 BUILD_ASSERT_DECL(OFPR_NO_MATCH == _ODPL_MISS_NR);
241 BUILD_ASSERT_DECL(OFPR_ACTION == 1);
242 BUILD_ASSERT_DECL(OFPR_ACTION == _ODPL_ACTION_NR);
244 static struct ofconn *ofconn_create(struct ofproto *, struct rconn *,
246 static void ofconn_destroy(struct ofconn *);
247 static void ofconn_run(struct ofconn *);
248 static void ofconn_wait(struct ofconn *);
249 static bool ofconn_receives_async_msgs(const struct ofconn *);
250 static char *ofconn_make_name(const struct ofproto *, const char *target);
251 static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst);
253 static void queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
254 struct rconn_packet_counter *counter);
256 static void send_packet_in(struct ofproto *, struct ofpbuf *odp_msg);
257 static void do_send_packet_in(struct ofpbuf *odp_msg, void *ofconn);
261 uint64_t datapath_id; /* Datapath ID. */
262 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
263 char *mfr_desc; /* Manufacturer. */
264 char *hw_desc; /* Hardware. */
265 char *sw_desc; /* Software version. */
266 char *serial_desc; /* Serial number. */
267 char *dp_desc; /* Datapath description. */
271 struct netdev_monitor *netdev_monitor;
272 struct hmap ports; /* Contains "struct ofport"s. */
273 struct shash port_by_name;
277 struct switch_status *switch_status;
278 struct fail_open *fail_open;
279 struct netflow *netflow;
280 struct ofproto_sflow *sflow;
282 /* In-band control. */
283 struct in_band *in_band;
284 long long int next_in_band_update;
285 struct sockaddr_in *extra_in_band_remotes;
286 size_t n_extra_remotes;
289 struct classifier cls;
290 bool need_revalidate;
291 long long int next_expiration;
292 struct tag_set revalidate_set;
294 /* OpenFlow connections. */
295 struct hmap controllers; /* Controller "struct ofconn"s. */
296 struct list all_conns; /* Contains "struct ofconn"s. */
297 enum ofproto_fail_mode fail_mode;
299 /* OpenFlow listeners. */
300 struct hmap services; /* Contains "struct ofservice"s. */
301 struct pvconn **snoops;
304 /* Hooks for ovs-vswitchd. */
305 const struct ofhooks *ofhooks;
308 /* Used by default ofhooks. */
309 struct mac_learning *ml;
312 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
314 static const struct ofhooks default_ofhooks;
316 static uint64_t pick_datapath_id(const struct ofproto *);
317 static uint64_t pick_fallback_dpid(void);
319 static int ofproto_expire(struct ofproto *);
321 static void update_stats(struct ofproto *, struct rule *,
322 const struct odp_flow_stats *);
323 static bool revalidate_rule(struct ofproto *p, struct rule *rule);
324 static void revalidate_cb(struct cls_rule *rule_, void *p_);
326 static void handle_odp_msg(struct ofproto *, struct ofpbuf *);
328 static void handle_openflow(struct ofconn *, struct ofpbuf *);
330 static struct ofport *get_port(const struct ofproto *, uint16_t odp_port);
331 static void update_port(struct ofproto *, const char *devname);
332 static int init_ports(struct ofproto *);
333 static void reinit_ports(struct ofproto *);
336 ofproto_create(const char *datapath, const char *datapath_type,
337 const struct ofhooks *ofhooks, void *aux,
338 struct ofproto **ofprotop)
340 struct odp_stats stats;
347 /* Connect to datapath and start listening for messages. */
348 error = dpif_open(datapath, datapath_type, &dpif);
350 VLOG_ERR("failed to open datapath %s: %s", datapath, strerror(error));
353 error = dpif_get_dp_stats(dpif, &stats);
355 VLOG_ERR("failed to obtain stats for datapath %s: %s",
356 datapath, strerror(error));
360 error = dpif_recv_set_mask(dpif, ODPL_MISS | ODPL_ACTION | ODPL_SFLOW);
362 VLOG_ERR("failed to listen on datapath %s: %s",
363 datapath, strerror(error));
367 dpif_flow_flush(dpif);
368 dpif_recv_purge(dpif);
370 /* Initialize settings. */
371 p = xzalloc(sizeof *p);
372 p->fallback_dpid = pick_fallback_dpid();
373 p->datapath_id = p->fallback_dpid;
374 p->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
375 p->hw_desc = xstrdup(DEFAULT_HW_DESC);
376 p->sw_desc = xstrdup(DEFAULT_SW_DESC);
377 p->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
378 p->dp_desc = xstrdup(DEFAULT_DP_DESC);
380 /* Initialize datapath. */
382 p->netdev_monitor = netdev_monitor_create();
383 hmap_init(&p->ports);
384 shash_init(&p->port_by_name);
385 p->max_ports = stats.max_ports;
387 /* Initialize submodules. */
388 p->switch_status = switch_status_create(p);
394 /* Initialize flow table. */
395 classifier_init(&p->cls);
396 p->need_revalidate = false;
397 p->next_expiration = time_msec() + 1000;
398 tag_set_init(&p->revalidate_set);
400 /* Initialize OpenFlow connections. */
401 list_init(&p->all_conns);
402 hmap_init(&p->controllers);
403 hmap_init(&p->services);
407 /* Initialize hooks. */
409 p->ofhooks = ofhooks;
413 p->ofhooks = &default_ofhooks;
415 p->ml = mac_learning_create();
418 /* Pick final datapath ID. */
419 p->datapath_id = pick_datapath_id(p);
420 VLOG_INFO("using datapath ID %016"PRIx64, p->datapath_id);
427 ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id)
429 uint64_t old_dpid = p->datapath_id;
430 p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p);
431 if (p->datapath_id != old_dpid) {
432 VLOG_INFO("datapath ID changed to %016"PRIx64, p->datapath_id);
434 /* Force all active connections to reconnect, since there is no way to
435 * notify a controller that the datapath ID has changed. */
436 ofproto_reconnect_controllers(p);
441 is_discovery_controller(const struct ofproto_controller *c)
443 return !strcmp(c->target, "discover");
447 is_in_band_controller(const struct ofproto_controller *c)
449 return is_discovery_controller(c) || c->band == OFPROTO_IN_BAND;
452 /* Creates a new controller in 'ofproto'. Some of the settings are initially
453 * drawn from 'c', but update_controller() needs to be called later to finish
454 * the new ofconn's configuration. */
456 add_controller(struct ofproto *ofproto, const struct ofproto_controller *c)
458 struct discovery *discovery;
459 struct ofconn *ofconn;
461 if (is_discovery_controller(c)) {
462 int error = discovery_create(c->accept_re, c->update_resolv_conf,
463 ofproto->dpif, ofproto->switch_status,
472 ofconn = ofconn_create(ofproto, rconn_create(5, 8), OFCONN_PRIMARY);
473 ofconn->pktbuf = pktbuf_create();
474 ofconn->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN;
476 ofconn->discovery = discovery;
478 char *name = ofconn_make_name(ofproto, c->target);
479 rconn_connect(ofconn->rconn, c->target, name);
482 hmap_insert(&ofproto->controllers, &ofconn->hmap_node,
483 hash_string(c->target, 0));
486 /* Reconfigures 'ofconn' to match 'c'. This function cannot update an ofconn's
487 * target or turn discovery on or off (these are done by creating new ofconns
488 * and deleting old ones), but it can update the rest of an ofconn's
491 update_controller(struct ofconn *ofconn, const struct ofproto_controller *c)
495 ofconn->band = (is_in_band_controller(c)
496 ? OFPROTO_IN_BAND : OFPROTO_OUT_OF_BAND);
498 rconn_set_max_backoff(ofconn->rconn, c->max_backoff);
500 probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0;
501 rconn_set_probe_interval(ofconn->rconn, probe_interval);
503 if (ofconn->discovery) {
504 discovery_set_update_resolv_conf(ofconn->discovery,
505 c->update_resolv_conf);
506 discovery_set_accept_controller_re(ofconn->discovery, c->accept_re);
509 ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
513 ofconn_get_target(const struct ofconn *ofconn)
515 return ofconn->discovery ? "discover" : rconn_get_target(ofconn->rconn);
518 static struct ofconn *
519 find_controller_by_target(struct ofproto *ofproto, const char *target)
521 struct ofconn *ofconn;
523 HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node,
524 hash_string(target, 0), &ofproto->controllers) {
525 if (!strcmp(ofconn_get_target(ofconn), target)) {
533 update_in_band_remotes(struct ofproto *ofproto)
535 const struct ofconn *ofconn;
536 struct sockaddr_in *addrs;
537 size_t max_addrs, n_addrs;
541 /* Allocate enough memory for as many remotes as we could possibly have. */
542 max_addrs = ofproto->n_extra_remotes + hmap_count(&ofproto->controllers);
543 addrs = xmalloc(max_addrs * sizeof *addrs);
546 /* Add all the remotes. */
548 HMAP_FOR_EACH (ofconn, hmap_node, &ofproto->controllers) {
549 struct sockaddr_in *sin = &addrs[n_addrs];
551 if (ofconn->band == OFPROTO_OUT_OF_BAND) {
555 sin->sin_addr.s_addr = rconn_get_remote_ip(ofconn->rconn);
556 if (sin->sin_addr.s_addr) {
557 sin->sin_port = rconn_get_remote_port(ofconn->rconn);
560 if (ofconn->discovery) {
564 for (i = 0; i < ofproto->n_extra_remotes; i++) {
565 addrs[n_addrs++] = ofproto->extra_in_band_remotes[i];
568 /* Create or update or destroy in-band.
570 * Ordinarily we only enable in-band if there's at least one remote
571 * address, but discovery needs the in-band rules for DHCP to be installed
572 * even before we know any remote addresses. */
573 if (n_addrs || discovery) {
574 if (!ofproto->in_band) {
575 in_band_create(ofproto, ofproto->dpif, ofproto->switch_status,
578 if (ofproto->in_band) {
579 in_band_set_remotes(ofproto->in_band, addrs, n_addrs);
581 ofproto->next_in_band_update = time_msec() + 1000;
583 in_band_destroy(ofproto->in_band);
584 ofproto->in_band = NULL;
592 update_fail_open(struct ofproto *p)
594 struct ofconn *ofconn;
596 if (!hmap_is_empty(&p->controllers)
597 && p->fail_mode == OFPROTO_FAIL_STANDALONE) {
598 struct rconn **rconns;
602 p->fail_open = fail_open_create(p, p->switch_status);
606 rconns = xmalloc(hmap_count(&p->controllers) * sizeof *rconns);
607 HMAP_FOR_EACH (ofconn, hmap_node, &p->controllers) {
608 rconns[n++] = ofconn->rconn;
611 fail_open_set_controllers(p->fail_open, rconns, n);
612 /* p->fail_open takes ownership of 'rconns'. */
614 fail_open_destroy(p->fail_open);
620 ofproto_set_controllers(struct ofproto *p,
621 const struct ofproto_controller *controllers,
622 size_t n_controllers)
624 struct shash new_controllers;
625 struct ofconn *ofconn, *next_ofconn;
626 struct ofservice *ofservice, *next_ofservice;
630 /* Create newly configured controllers and services.
631 * Create a name to ofproto_controller mapping in 'new_controllers'. */
632 shash_init(&new_controllers);
633 for (i = 0; i < n_controllers; i++) {
634 const struct ofproto_controller *c = &controllers[i];
636 if (!vconn_verify_name(c->target) || !strcmp(c->target, "discover")) {
637 if (!find_controller_by_target(p, c->target)) {
638 add_controller(p, c);
640 } else if (!pvconn_verify_name(c->target)) {
641 if (!ofservice_lookup(p, c->target) && ofservice_create(p, c)) {
645 VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"",
646 dpif_name(p->dpif), c->target);
650 shash_add_once(&new_controllers, c->target, &controllers[i]);
653 /* Delete controllers that are no longer configured.
654 * Update configuration of all now-existing controllers. */
656 HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &p->controllers) {
657 struct ofproto_controller *c;
659 c = shash_find_data(&new_controllers, ofconn_get_target(ofconn));
661 ofconn_destroy(ofconn);
663 update_controller(ofconn, c);
670 /* Delete services that are no longer configured.
671 * Update configuration of all now-existing services. */
672 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) {
673 struct ofproto_controller *c;
675 c = shash_find_data(&new_controllers,
676 pvconn_get_name(ofservice->pvconn));
678 ofservice_destroy(p, ofservice);
680 ofservice_reconfigure(ofservice, c);
684 shash_destroy(&new_controllers);
686 update_in_band_remotes(p);
689 if (!hmap_is_empty(&p->controllers) && !ss_exists) {
690 ofconn = CONTAINER_OF(hmap_first(&p->controllers),
691 struct ofconn, hmap_node);
692 ofconn->ss = switch_status_register(p->switch_status, "remote",
693 rconn_status_cb, ofconn->rconn);
698 ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode)
700 p->fail_mode = fail_mode;
704 /* Drops the connections between 'ofproto' and all of its controllers, forcing
705 * them to reconnect. */
707 ofproto_reconnect_controllers(struct ofproto *ofproto)
709 struct ofconn *ofconn;
711 LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
712 rconn_reconnect(ofconn->rconn);
717 any_extras_changed(const struct ofproto *ofproto,
718 const struct sockaddr_in *extras, size_t n)
722 if (n != ofproto->n_extra_remotes) {
726 for (i = 0; i < n; i++) {
727 const struct sockaddr_in *old = &ofproto->extra_in_band_remotes[i];
728 const struct sockaddr_in *new = &extras[i];
730 if (old->sin_addr.s_addr != new->sin_addr.s_addr ||
731 old->sin_port != new->sin_port) {
739 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s
740 * in-band control should guarantee access, in the same way that in-band
741 * control guarantees access to OpenFlow controllers. */
743 ofproto_set_extra_in_band_remotes(struct ofproto *ofproto,
744 const struct sockaddr_in *extras, size_t n)
746 if (!any_extras_changed(ofproto, extras, n)) {
750 free(ofproto->extra_in_band_remotes);
751 ofproto->n_extra_remotes = n;
752 ofproto->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras);
754 update_in_band_remotes(ofproto);
758 ofproto_set_desc(struct ofproto *p,
759 const char *mfr_desc, const char *hw_desc,
760 const char *sw_desc, const char *serial_desc,
763 struct ofp_desc_stats *ods;
766 if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
767 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
768 sizeof ods->mfr_desc);
771 p->mfr_desc = xstrdup(mfr_desc);
774 if (strlen(hw_desc) >= sizeof ods->hw_desc) {
775 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
776 sizeof ods->hw_desc);
779 p->hw_desc = xstrdup(hw_desc);
782 if (strlen(sw_desc) >= sizeof ods->sw_desc) {
783 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
784 sizeof ods->sw_desc);
787 p->sw_desc = xstrdup(sw_desc);
790 if (strlen(serial_desc) >= sizeof ods->serial_num) {
791 VLOG_WARN("truncating serial_desc, must be less than %zu "
793 sizeof ods->serial_num);
795 free(p->serial_desc);
796 p->serial_desc = xstrdup(serial_desc);
799 if (strlen(dp_desc) >= sizeof ods->dp_desc) {
800 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
801 sizeof ods->dp_desc);
804 p->dp_desc = xstrdup(dp_desc);
809 set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
810 const struct svec *svec)
812 struct pvconn **pvconns = *pvconnsp;
813 size_t n_pvconns = *n_pvconnsp;
817 for (i = 0; i < n_pvconns; i++) {
818 pvconn_close(pvconns[i]);
822 pvconns = xmalloc(svec->n * sizeof *pvconns);
824 for (i = 0; i < svec->n; i++) {
825 const char *name = svec->names[i];
826 struct pvconn *pvconn;
829 error = pvconn_open(name, &pvconn);
831 pvconns[n_pvconns++] = pvconn;
833 VLOG_ERR("failed to listen on %s: %s", name, strerror(error));
841 *n_pvconnsp = n_pvconns;
847 ofproto_set_snoops(struct ofproto *ofproto, const struct svec *snoops)
849 return set_pvconns(&ofproto->snoops, &ofproto->n_snoops, snoops);
853 ofproto_set_netflow(struct ofproto *ofproto,
854 const struct netflow_options *nf_options)
856 if (nf_options && nf_options->collectors.n) {
857 if (!ofproto->netflow) {
858 ofproto->netflow = netflow_create();
860 return netflow_set_options(ofproto->netflow, nf_options);
862 netflow_destroy(ofproto->netflow);
863 ofproto->netflow = NULL;
869 ofproto_set_sflow(struct ofproto *ofproto,
870 const struct ofproto_sflow_options *oso)
872 struct ofproto_sflow *os = ofproto->sflow;
875 struct ofport *ofport;
877 os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
878 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
879 ofproto_sflow_add_port(os, ofport->odp_port,
880 netdev_get_name(ofport->netdev));
883 ofproto_sflow_set_options(os, oso);
885 ofproto_sflow_destroy(os);
886 ofproto->sflow = NULL;
891 ofproto_get_datapath_id(const struct ofproto *ofproto)
893 return ofproto->datapath_id;
897 ofproto_has_primary_controller(const struct ofproto *ofproto)
899 return !hmap_is_empty(&ofproto->controllers);
902 enum ofproto_fail_mode
903 ofproto_get_fail_mode(const struct ofproto *p)
909 ofproto_get_snoops(const struct ofproto *ofproto, struct svec *snoops)
913 for (i = 0; i < ofproto->n_snoops; i++) {
914 svec_add(snoops, pvconn_get_name(ofproto->snoops[i]));
919 ofproto_destroy(struct ofproto *p)
921 struct ofservice *ofservice, *next_ofservice;
922 struct ofconn *ofconn, *next_ofconn;
923 struct ofport *ofport, *next_ofport;
930 /* Destroy fail-open and in-band early, since they touch the classifier. */
931 fail_open_destroy(p->fail_open);
934 in_band_destroy(p->in_band);
936 free(p->extra_in_band_remotes);
938 ofproto_flush_flows(p);
939 classifier_destroy(&p->cls);
941 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) {
942 ofconn_destroy(ofconn);
944 hmap_destroy(&p->controllers);
947 netdev_monitor_destroy(p->netdev_monitor);
948 HMAP_FOR_EACH_SAFE (ofport, next_ofport, hmap_node, &p->ports) {
949 hmap_remove(&p->ports, &ofport->hmap_node);
952 shash_destroy(&p->port_by_name);
954 switch_status_destroy(p->switch_status);
955 netflow_destroy(p->netflow);
956 ofproto_sflow_destroy(p->sflow);
958 HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) {
959 ofservice_destroy(p, ofservice);
961 hmap_destroy(&p->services);
963 for (i = 0; i < p->n_snoops; i++) {
964 pvconn_close(p->snoops[i]);
968 mac_learning_destroy(p->ml);
973 free(p->serial_desc);
976 hmap_destroy(&p->ports);
982 ofproto_run(struct ofproto *p)
984 int error = ofproto_run1(p);
986 error = ofproto_run2(p, false);
992 process_port_change(struct ofproto *ofproto, int error, char *devname)
994 if (error == ENOBUFS) {
995 reinit_ports(ofproto);
997 update_port(ofproto, devname);
1002 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
1003 * means that 'ofconn' is more interesting for monitoring than a lower return
1006 snoop_preference(const struct ofconn *ofconn)
1008 switch (ofconn->role) {
1009 case NX_ROLE_MASTER:
1016 /* Shouldn't happen. */
1021 /* One of ofproto's "snoop" pvconns has accepted a new connection on 'vconn'.
1022 * Connects this vconn to a controller. */
1024 add_snooper(struct ofproto *ofproto, struct vconn *vconn)
1026 struct ofconn *ofconn, *best;
1028 /* Pick a controller for monitoring. */
1030 LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
1031 if (ofconn->type == OFCONN_PRIMARY
1032 && (!best || snoop_preference(ofconn) > snoop_preference(best))) {
1038 rconn_add_monitor(best->rconn, vconn);
1040 VLOG_INFO_RL(&rl, "no controller connection to snoop");
1046 ofproto_run1(struct ofproto *p)
1048 struct ofconn *ofconn, *next_ofconn;
1049 struct ofservice *ofservice;
1054 if (shash_is_empty(&p->port_by_name)) {
1058 for (i = 0; i < 50; i++) {
1061 error = dpif_recv(p->dpif, &buf);
1063 if (error == ENODEV) {
1064 /* Someone destroyed the datapath behind our back. The caller
1065 * better destroy us and give up, because we're just going to
1066 * spin from here on out. */
1067 static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5);
1068 VLOG_ERR_RL(&rl2, "%s: datapath was destroyed externally",
1069 dpif_name(p->dpif));
1075 handle_odp_msg(p, buf);
1078 while ((error = dpif_port_poll(p->dpif, &devname)) != EAGAIN) {
1079 process_port_change(p, error, devname);
1081 while ((error = netdev_monitor_poll(p->netdev_monitor,
1082 &devname)) != EAGAIN) {
1083 process_port_change(p, error, devname);
1087 if (time_msec() >= p->next_in_band_update) {
1088 update_in_band_remotes(p);
1090 in_band_run(p->in_band);
1093 LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) {
1097 /* Fail-open maintenance. Do this after processing the ofconns since
1098 * fail-open checks the status of the controller rconn. */
1100 fail_open_run(p->fail_open);
1103 HMAP_FOR_EACH (ofservice, node, &p->services) {
1104 struct vconn *vconn;
1107 retval = pvconn_accept(ofservice->pvconn, OFP_VERSION, &vconn);
1109 struct rconn *rconn;
1112 rconn = rconn_create(ofservice->probe_interval, 0);
1113 name = ofconn_make_name(p, vconn_get_name(vconn));
1114 rconn_connect_unreliably(rconn, vconn, name);
1117 ofconn = ofconn_create(p, rconn, OFCONN_SERVICE);
1118 ofconn_set_rate_limit(ofconn, ofservice->rate_limit,
1119 ofservice->burst_limit);
1120 } else if (retval != EAGAIN) {
1121 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
1125 for (i = 0; i < p->n_snoops; i++) {
1126 struct vconn *vconn;
1129 retval = pvconn_accept(p->snoops[i], OFP_VERSION, &vconn);
1131 add_snooper(p, vconn);
1132 } else if (retval != EAGAIN) {
1133 VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval));
1137 if (time_msec() >= p->next_expiration) {
1138 int delay = ofproto_expire(p);
1139 p->next_expiration = time_msec() + delay;
1140 COVERAGE_INC(ofproto_expiration);
1144 netflow_run(p->netflow);
1147 ofproto_sflow_run(p->sflow);
1153 struct revalidate_cbdata {
1154 struct ofproto *ofproto;
1155 bool revalidate_all; /* Revalidate all exact-match rules? */
1156 bool revalidate_subrules; /* Revalidate all exact-match subrules? */
1157 struct tag_set revalidate_set; /* Set of tags to revalidate. */
1161 ofproto_run2(struct ofproto *p, bool revalidate_all)
1163 if (p->need_revalidate || revalidate_all
1164 || !tag_set_is_empty(&p->revalidate_set)) {
1165 struct revalidate_cbdata cbdata;
1167 cbdata.revalidate_all = revalidate_all;
1168 cbdata.revalidate_subrules = p->need_revalidate;
1169 cbdata.revalidate_set = p->revalidate_set;
1170 tag_set_init(&p->revalidate_set);
1171 COVERAGE_INC(ofproto_revalidate);
1172 classifier_for_each(&p->cls, CLS_INC_EXACT, revalidate_cb, &cbdata);
1173 p->need_revalidate = false;
1180 ofproto_wait(struct ofproto *p)
1182 struct ofservice *ofservice;
1183 struct ofconn *ofconn;
1186 dpif_recv_wait(p->dpif);
1187 dpif_port_poll_wait(p->dpif);
1188 netdev_monitor_poll_wait(p->netdev_monitor);
1189 LIST_FOR_EACH (ofconn, node, &p->all_conns) {
1190 ofconn_wait(ofconn);
1193 poll_timer_wait_until(p->next_in_band_update);
1194 in_band_wait(p->in_band);
1197 fail_open_wait(p->fail_open);
1200 ofproto_sflow_wait(p->sflow);
1202 if (!tag_set_is_empty(&p->revalidate_set)) {
1203 poll_immediate_wake();
1205 if (p->need_revalidate) {
1206 /* Shouldn't happen, but if it does just go around again. */
1207 VLOG_DBG_RL(&rl, "need revalidate in ofproto_wait_cb()");
1208 poll_immediate_wake();
1209 } else if (p->next_expiration != LLONG_MAX) {
1210 poll_timer_wait_until(p->next_expiration);
1212 HMAP_FOR_EACH (ofservice, node, &p->services) {
1213 pvconn_wait(ofservice->pvconn);
1215 for (i = 0; i < p->n_snoops; i++) {
1216 pvconn_wait(p->snoops[i]);
1221 ofproto_revalidate(struct ofproto *ofproto, tag_type tag)
1223 tag_set_add(&ofproto->revalidate_set, tag);
1227 ofproto_get_revalidate_set(struct ofproto *ofproto)
1229 return &ofproto->revalidate_set;
1233 ofproto_is_alive(const struct ofproto *p)
1235 return !hmap_is_empty(&p->controllers);
1238 /* Deletes port number 'odp_port' from the datapath for 'ofproto'.
1240 * This is almost the same as calling dpif_port_del() directly on the
1241 * datapath, but it also makes 'ofproto' close its open netdev for the port
1242 * (if any). This makes it possible to create a new netdev of a different
1243 * type under the same name, which otherwise the netdev library would refuse
1244 * to do because of the conflict. (The netdev would eventually get closed on
1245 * the next trip through ofproto_run(), but this interface is more direct.)
1247 * Returns 0 if successful, otherwise a positive errno. */
1249 ofproto_port_del(struct ofproto *ofproto, uint16_t odp_port)
1251 struct ofport *ofport = get_port(ofproto, odp_port);
1252 const char *name = ofport ? (char *) ofport->opp.name : "<unknown>";
1255 error = dpif_port_del(ofproto->dpif, odp_port);
1257 VLOG_ERR("%s: failed to remove port %"PRIu16" (%s) interface (%s)",
1258 dpif_name(ofproto->dpif), odp_port, name, strerror(error));
1259 } else if (ofport) {
1260 /* 'name' is ofport->opp.name and update_port() is going to destroy
1261 * 'ofport'. Just in case update_port() refers to 'name' after it
1262 * destroys 'ofport', make a copy of it around the update_port()
1264 char *devname = xstrdup(name);
1265 update_port(ofproto, devname);
1271 /* Checks if 'ofproto' thinks 'odp_port' should be included in floods. Returns
1272 * true if 'odp_port' exists and should be included, false otherwise. */
1274 ofproto_port_is_floodable(struct ofproto *ofproto, uint16_t odp_port)
1276 struct ofport *ofport = get_port(ofproto, odp_port);
1277 return ofport && !(ofport->opp.config & OFPPC_NO_FLOOD);
1281 ofproto_send_packet(struct ofproto *p, const struct flow *flow,
1282 const union ofp_action *actions, size_t n_actions,
1283 const struct ofpbuf *packet)
1285 struct odp_actions odp_actions;
1288 error = xlate_actions(actions, n_actions, flow, p, packet, &odp_actions,
1294 /* XXX Should we translate the dpif_execute() errno value into an OpenFlow
1296 dpif_execute(p->dpif, odp_actions.actions, odp_actions.n_actions, packet);
1301 ofproto_add_flow(struct ofproto *p, const struct flow *flow,
1302 uint32_t wildcards, unsigned int priority,
1303 const union ofp_action *actions, size_t n_actions,
1307 rule = rule_create(p, NULL, actions, n_actions,
1308 idle_timeout >= 0 ? idle_timeout : 5 /* XXX */,
1310 cls_rule_from_flow(flow, wildcards, priority, &rule->cr);
1311 rule_insert(p, rule, NULL, 0);
1315 ofproto_delete_flow(struct ofproto *ofproto, const struct flow *flow,
1316 uint32_t wildcards, unsigned int priority)
1318 struct cls_rule target;
1321 cls_rule_from_flow(flow, wildcards, priority, &target);
1322 rule = rule_from_cls_rule(classifier_find_rule_exactly(&ofproto->cls,
1325 rule_remove(ofproto, rule);
1330 destroy_rule(struct cls_rule *rule_, void *ofproto_)
1332 struct rule *rule = rule_from_cls_rule(rule_);
1333 struct ofproto *ofproto = ofproto_;
1335 /* Mark the flow as not installed, even though it might really be
1336 * installed, so that rule_remove() doesn't bother trying to uninstall it.
1337 * There is no point in uninstalling it individually since we are about to
1338 * blow away all the flows with dpif_flow_flush(). */
1339 rule->installed = false;
1341 rule_remove(ofproto, rule);
1345 ofproto_flush_flows(struct ofproto *ofproto)
1347 COVERAGE_INC(ofproto_flush);
1348 classifier_for_each(&ofproto->cls, CLS_INC_ALL, destroy_rule, ofproto);
1349 dpif_flow_flush(ofproto->dpif);
1350 if (ofproto->in_band) {
1351 in_band_flushed(ofproto->in_band);
1353 if (ofproto->fail_open) {
1354 fail_open_flushed(ofproto->fail_open);
1359 reinit_ports(struct ofproto *p)
1361 struct svec devnames;
1362 struct ofport *ofport;
1363 struct odp_port *odp_ports;
1367 COVERAGE_INC(ofproto_reinit_ports);
1369 svec_init(&devnames);
1370 HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
1371 svec_add (&devnames, (char *) ofport->opp.name);
1373 dpif_port_list(p->dpif, &odp_ports, &n_odp_ports);
1374 for (i = 0; i < n_odp_ports; i++) {
1375 svec_add (&devnames, odp_ports[i].devname);
1379 svec_sort_unique(&devnames);
1380 for (i = 0; i < devnames.n; i++) {
1381 update_port(p, devnames.names[i]);
1383 svec_destroy(&devnames);
1386 static struct ofport *
1387 make_ofport(const struct odp_port *odp_port)
1389 struct netdev_options netdev_options;
1390 enum netdev_flags flags;
1391 struct ofport *ofport;
1392 struct netdev *netdev;
1395 memset(&netdev_options, 0, sizeof netdev_options);
1396 netdev_options.name = odp_port->devname;
1397 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
1399 error = netdev_open(&netdev_options, &netdev);
1401 VLOG_WARN_RL(&rl, "ignoring port %s (%"PRIu16") because netdev %s "
1402 "cannot be opened (%s)",
1403 odp_port->devname, odp_port->port,
1404 odp_port->devname, strerror(error));
1408 ofport = xmalloc(sizeof *ofport);
1409 ofport->netdev = netdev;
1410 ofport->odp_port = odp_port->port;
1411 ofport->opp.port_no = odp_port_to_ofp_port(odp_port->port);
1412 netdev_get_etheraddr(netdev, ofport->opp.hw_addr);
1413 memcpy(ofport->opp.name, odp_port->devname,
1414 MIN(sizeof ofport->opp.name, sizeof odp_port->devname));
1415 ofport->opp.name[sizeof ofport->opp.name - 1] = '\0';
1417 netdev_get_flags(netdev, &flags);
1418 ofport->opp.config = flags & NETDEV_UP ? 0 : OFPPC_PORT_DOWN;
1420 ofport->opp.state = netdev_get_carrier(netdev) ? 0 : OFPPS_LINK_DOWN;
1422 netdev_get_features(netdev,
1423 &ofport->opp.curr, &ofport->opp.advertised,
1424 &ofport->opp.supported, &ofport->opp.peer);
1429 ofport_conflicts(const struct ofproto *p, const struct odp_port *odp_port)
1431 if (get_port(p, odp_port->port)) {
1432 VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
1435 } else if (shash_find(&p->port_by_name, odp_port->devname)) {
1436 VLOG_WARN_RL(&rl, "ignoring duplicate device %s in datapath",
1445 ofport_equal(const struct ofport *a_, const struct ofport *b_)
1447 const struct ofp_phy_port *a = &a_->opp;
1448 const struct ofp_phy_port *b = &b_->opp;
1450 BUILD_ASSERT_DECL(sizeof *a == 48); /* Detect ofp_phy_port changes. */
1451 return (a->port_no == b->port_no
1452 && !memcmp(a->hw_addr, b->hw_addr, sizeof a->hw_addr)
1453 && !strcmp((char *) a->name, (char *) b->name)
1454 && a->state == b->state
1455 && a->config == b->config
1456 && a->curr == b->curr
1457 && a->advertised == b->advertised
1458 && a->supported == b->supported
1459 && a->peer == b->peer);
1463 send_port_status(struct ofproto *p, const struct ofport *ofport,
1466 /* XXX Should limit the number of queued port status change messages. */
1467 struct ofconn *ofconn;
1468 LIST_FOR_EACH (ofconn, node, &p->all_conns) {
1469 struct ofp_port_status *ops;
1472 if (!ofconn_receives_async_msgs(ofconn)) {
1476 ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b);
1477 ops->reason = reason;
1478 ops->desc = ofport->opp;
1479 hton_ofp_phy_port(&ops->desc);
1480 queue_tx(b, ofconn, NULL);
1485 ofport_install(struct ofproto *p, struct ofport *ofport)
1487 const char *netdev_name = (const char *) ofport->opp.name;
1489 netdev_monitor_add(p->netdev_monitor, ofport->netdev);
1490 hmap_insert(&p->ports, &ofport->hmap_node, hash_int(ofport->odp_port, 0));
1491 shash_add(&p->port_by_name, netdev_name, ofport);
1493 ofproto_sflow_add_port(p->sflow, ofport->odp_port, netdev_name);
1498 ofport_remove(struct ofproto *p, struct ofport *ofport)
1500 netdev_monitor_remove(p->netdev_monitor, ofport->netdev);
1501 hmap_remove(&p->ports, &ofport->hmap_node);
1502 shash_delete(&p->port_by_name,
1503 shash_find(&p->port_by_name, (char *) ofport->opp.name));
1505 ofproto_sflow_del_port(p->sflow, ofport->odp_port);
1510 ofport_free(struct ofport *ofport)
1513 netdev_close(ofport->netdev);
1518 static struct ofport *
1519 get_port(const struct ofproto *ofproto, uint16_t odp_port)
1521 struct ofport *port;
1523 HMAP_FOR_EACH_IN_BUCKET (port, hmap_node,
1524 hash_int(odp_port, 0), &ofproto->ports) {
1525 if (port->odp_port == odp_port) {
1533 update_port(struct ofproto *p, const char *devname)
1535 struct odp_port odp_port;
1536 struct ofport *old_ofport;
1537 struct ofport *new_ofport;
1540 COVERAGE_INC(ofproto_update_port);
1542 /* Query the datapath for port information. */
1543 error = dpif_port_query_by_name(p->dpif, devname, &odp_port);
1545 /* Find the old ofport. */
1546 old_ofport = shash_find_data(&p->port_by_name, devname);
1549 /* There's no port named 'devname' but there might be a port with
1550 * the same port number. This could happen if a port is deleted
1551 * and then a new one added in its place very quickly, or if a port
1552 * is renamed. In the former case we want to send an OFPPR_DELETE
1553 * and an OFPPR_ADD, and in the latter case we want to send a
1554 * single OFPPR_MODIFY. We can distinguish the cases by comparing
1555 * the old port's ifindex against the new port, or perhaps less
1556 * reliably but more portably by comparing the old port's MAC
1557 * against the new port's MAC. However, this code isn't that smart
1558 * and always sends an OFPPR_MODIFY (XXX). */
1559 old_ofport = get_port(p, odp_port.port);
1561 } else if (error != ENOENT && error != ENODEV) {
1562 VLOG_WARN_RL(&rl, "dpif_port_query_by_name returned unexpected error "
1563 "%s", strerror(error));
1567 /* Create a new ofport. */
1568 new_ofport = !error ? make_ofport(&odp_port) : NULL;
1570 /* Eliminate a few pathological cases. */
1571 if (!old_ofport && !new_ofport) {
1573 } else if (old_ofport && new_ofport) {
1574 /* Most of the 'config' bits are OpenFlow soft state, but
1575 * OFPPC_PORT_DOWN is maintained the kernel. So transfer the OpenFlow
1576 * bits from old_ofport. (make_ofport() only sets OFPPC_PORT_DOWN and
1577 * leaves the other bits 0.) */
1578 new_ofport->opp.config |= old_ofport->opp.config & ~OFPPC_PORT_DOWN;
1580 if (ofport_equal(old_ofport, new_ofport)) {
1581 /* False alarm--no change. */
1582 ofport_free(new_ofport);
1587 /* Now deal with the normal cases. */
1589 ofport_remove(p, old_ofport);
1592 ofport_install(p, new_ofport);
1594 send_port_status(p, new_ofport ? new_ofport : old_ofport,
1595 (!old_ofport ? OFPPR_ADD
1596 : !new_ofport ? OFPPR_DELETE
1598 ofport_free(old_ofport);
1602 init_ports(struct ofproto *p)
1604 struct odp_port *ports;
1609 error = dpif_port_list(p->dpif, &ports, &n_ports);
1614 for (i = 0; i < n_ports; i++) {
1615 const struct odp_port *odp_port = &ports[i];
1616 if (!ofport_conflicts(p, odp_port)) {
1617 struct ofport *ofport = make_ofport(odp_port);
1619 ofport_install(p, ofport);
1627 static struct ofconn *
1628 ofconn_create(struct ofproto *p, struct rconn *rconn, enum ofconn_type type)
1630 struct ofconn *ofconn = xzalloc(sizeof *ofconn);
1631 ofconn->ofproto = p;
1632 list_push_back(&p->all_conns, &ofconn->node);
1633 ofconn->rconn = rconn;
1634 ofconn->type = type;
1635 ofconn->flow_format = NXFF_OPENFLOW10;
1636 ofconn->role = NX_ROLE_OTHER;
1637 ofconn->packet_in_counter = rconn_packet_counter_create ();
1638 ofconn->pktbuf = NULL;
1639 ofconn->miss_send_len = 0;
1640 ofconn->reply_counter = rconn_packet_counter_create ();
1645 ofconn_destroy(struct ofconn *ofconn)
1647 if (ofconn->type == OFCONN_PRIMARY) {
1648 hmap_remove(&ofconn->ofproto->controllers, &ofconn->hmap_node);
1650 discovery_destroy(ofconn->discovery);
1652 list_remove(&ofconn->node);
1653 switch_status_unregister(ofconn->ss);
1654 rconn_destroy(ofconn->rconn);
1655 rconn_packet_counter_destroy(ofconn->packet_in_counter);
1656 rconn_packet_counter_destroy(ofconn->reply_counter);
1657 pktbuf_destroy(ofconn->pktbuf);
1662 ofconn_run(struct ofconn *ofconn)
1664 struct ofproto *p = ofconn->ofproto;
1668 if (ofconn->discovery) {
1669 char *controller_name;
1670 if (rconn_is_connectivity_questionable(ofconn->rconn)) {
1671 discovery_question_connectivity(ofconn->discovery);
1673 if (discovery_run(ofconn->discovery, &controller_name)) {
1674 if (controller_name) {
1675 char *ofconn_name = ofconn_make_name(p, controller_name);
1676 rconn_connect(ofconn->rconn, controller_name, ofconn_name);
1679 rconn_disconnect(ofconn->rconn);
1684 for (i = 0; i < N_SCHEDULERS; i++) {
1685 pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn);
1688 rconn_run(ofconn->rconn);
1690 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1691 /* Limit the number of iterations to prevent other tasks from
1693 for (iteration = 0; iteration < 50; iteration++) {
1694 struct ofpbuf *of_msg = rconn_recv(ofconn->rconn);
1699 fail_open_maybe_recover(p->fail_open);
1701 handle_openflow(ofconn, of_msg);
1702 ofpbuf_delete(of_msg);
1706 if (!ofconn->discovery && !rconn_is_alive(ofconn->rconn)) {
1707 ofconn_destroy(ofconn);
1712 ofconn_wait(struct ofconn *ofconn)
1716 if (ofconn->discovery) {
1717 discovery_wait(ofconn->discovery);
1719 for (i = 0; i < N_SCHEDULERS; i++) {
1720 pinsched_wait(ofconn->schedulers[i]);
1722 rconn_run_wait(ofconn->rconn);
1723 if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) {
1724 rconn_recv_wait(ofconn->rconn);
1726 COVERAGE_INC(ofproto_ofconn_stuck);
1730 /* Returns true if 'ofconn' should receive asynchronous messages. */
1732 ofconn_receives_async_msgs(const struct ofconn *ofconn)
1734 if (ofconn->type == OFCONN_PRIMARY) {
1735 /* Primary controllers always get asynchronous messages unless they
1736 * have configured themselves as "slaves". */
1737 return ofconn->role != NX_ROLE_SLAVE;
1739 /* Service connections don't get asynchronous messages unless they have
1740 * explicitly asked for them by setting a nonzero miss send length. */
1741 return ofconn->miss_send_len > 0;
1745 /* Returns a human-readable name for an OpenFlow connection between 'ofproto'
1746 * and 'target', suitable for use in log messages for identifying the
1749 * The name is dynamically allocated. The caller should free it (with free())
1750 * when it is no longer needed. */
1752 ofconn_make_name(const struct ofproto *ofproto, const char *target)
1754 return xasprintf("%s<->%s", dpif_base_name(ofproto->dpif), target);
1758 ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst)
1762 for (i = 0; i < N_SCHEDULERS; i++) {
1763 struct pinsched **s = &ofconn->schedulers[i];
1767 *s = pinsched_create(rate, burst,
1768 ofconn->ofproto->switch_status);
1770 pinsched_set_limits(*s, rate, burst);
1773 pinsched_destroy(*s);
1780 ofservice_reconfigure(struct ofservice *ofservice,
1781 const struct ofproto_controller *c)
1783 ofservice->probe_interval = c->probe_interval;
1784 ofservice->rate_limit = c->rate_limit;
1785 ofservice->burst_limit = c->burst_limit;
1788 /* Creates a new ofservice in 'ofproto'. Returns 0 if successful, otherwise a
1789 * positive errno value. */
1791 ofservice_create(struct ofproto *ofproto, const struct ofproto_controller *c)
1793 struct ofservice *ofservice;
1794 struct pvconn *pvconn;
1797 error = pvconn_open(c->target, &pvconn);
1802 ofservice = xzalloc(sizeof *ofservice);
1803 hmap_insert(&ofproto->services, &ofservice->node,
1804 hash_string(c->target, 0));
1805 ofservice->pvconn = pvconn;
1807 ofservice_reconfigure(ofservice, c);
1813 ofservice_destroy(struct ofproto *ofproto, struct ofservice *ofservice)
1815 hmap_remove(&ofproto->services, &ofservice->node);
1816 pvconn_close(ofservice->pvconn);
1820 /* Finds and returns the ofservice within 'ofproto' that has the given
1821 * 'target', or a null pointer if none exists. */
1822 static struct ofservice *
1823 ofservice_lookup(struct ofproto *ofproto, const char *target)
1825 struct ofservice *ofservice;
1827 HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0),
1828 &ofproto->services) {
1829 if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) {
1836 /* Caller is responsible for initializing the 'cr' member of the returned
1838 static struct rule *
1839 rule_create(struct ofproto *ofproto, struct rule *super,
1840 const union ofp_action *actions, size_t n_actions,
1841 uint16_t idle_timeout, uint16_t hard_timeout,
1842 ovs_be64 flow_cookie, bool send_flow_removed)
1844 struct rule *rule = xzalloc(sizeof *rule);
1845 rule->idle_timeout = idle_timeout;
1846 rule->hard_timeout = hard_timeout;
1847 rule->flow_cookie = flow_cookie;
1848 rule->used = rule->created = time_msec();
1849 rule->send_flow_removed = send_flow_removed;
1850 rule->super = super;
1852 list_push_back(&super->list, &rule->list);
1854 list_init(&rule->list);
1856 if (n_actions > 0) {
1857 rule->n_actions = n_actions;
1858 rule->actions = xmemdup(actions, n_actions * sizeof *actions);
1860 netflow_flow_clear(&rule->nf_flow);
1861 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->created);
1866 static struct rule *
1867 rule_from_cls_rule(const struct cls_rule *cls_rule)
1869 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
1873 rule_free(struct rule *rule)
1875 free(rule->actions);
1876 free(rule->odp_actions);
1880 /* Destroys 'rule'. If 'rule' is a subrule, also removes it from its
1881 * super-rule's list of subrules. If 'rule' is a super-rule, also iterates
1882 * through all of its subrules and revalidates them, destroying any that no
1883 * longer has a super-rule (which is probably all of them).
1885 * Before calling this function, the caller must make have removed 'rule' from
1886 * the classifier. If 'rule' is an exact-match rule, the caller is also
1887 * responsible for ensuring that it has been uninstalled from the datapath. */
1889 rule_destroy(struct ofproto *ofproto, struct rule *rule)
1892 struct rule *subrule, *next;
1893 LIST_FOR_EACH_SAFE (subrule, next, list, &rule->list) {
1894 revalidate_rule(ofproto, subrule);
1897 list_remove(&rule->list);
1903 rule_has_out_port(const struct rule *rule, ovs_be16 out_port)
1905 const union ofp_action *oa;
1906 struct actions_iterator i;
1908 if (out_port == htons(OFPP_NONE)) {
1911 for (oa = actions_first(&i, rule->actions, rule->n_actions); oa;
1912 oa = actions_next(&i)) {
1913 if (action_outputs_to_port(oa, out_port)) {
1920 /* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
1921 * 'packet', which arrived on 'in_port'.
1923 * Takes ownership of 'packet'. */
1925 execute_odp_actions(struct ofproto *ofproto, uint16_t in_port,
1926 const union odp_action *actions, size_t n_actions,
1927 struct ofpbuf *packet)
1929 if (n_actions == 1 && actions[0].type == ODPAT_CONTROLLER) {
1930 /* As an optimization, avoid a round-trip from userspace to kernel to
1931 * userspace. This also avoids possibly filling up kernel packet
1932 * buffers along the way. */
1933 struct odp_msg *msg;
1935 msg = ofpbuf_push_uninit(packet, sizeof *msg);
1936 msg->type = _ODPL_ACTION_NR;
1937 msg->length = sizeof(struct odp_msg) + packet->size;
1938 msg->port = in_port;
1940 msg->arg = actions[0].controller.arg;
1942 send_packet_in(ofproto, packet);
1948 error = dpif_execute(ofproto->dpif, actions, n_actions, packet);
1949 ofpbuf_delete(packet);
1954 /* Executes the actions indicated by 'rule' on 'packet', which is in flow
1955 * 'flow' and is considered to have arrived on ODP port 'in_port'. 'packet'
1956 * must have at least sizeof(struct ofp_packet_in) bytes of headroom.
1958 * The flow that 'packet' actually contains does not need to actually match
1959 * 'rule'; the actions in 'rule' will be applied to it either way. Likewise,
1960 * the packet and byte counters for 'rule' will be credited for the packet sent
1961 * out whether or not the packet actually matches 'rule'.
1963 * If 'rule' is an exact-match rule and 'flow' actually equals the rule's flow,
1964 * the caller must already have accurately composed ODP actions for it given
1965 * 'packet' using rule_make_actions(). If 'rule' is a wildcard rule, or if
1966 * 'rule' is an exact-match rule but 'flow' is not the rule's flow, then this
1967 * function will compose a set of ODP actions based on 'rule''s OpenFlow
1968 * actions and apply them to 'packet'.
1970 * Takes ownership of 'packet'. */
1972 rule_execute(struct ofproto *ofproto, struct rule *rule,
1973 struct ofpbuf *packet, const struct flow *flow)
1975 const union odp_action *actions;
1976 struct odp_flow_stats stats;
1978 struct odp_actions a;
1980 assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
1982 /* Grab or compose the ODP actions.
1984 * The special case for an exact-match 'rule' where 'flow' is not the
1985 * rule's flow is important to avoid, e.g., sending a packet out its input
1986 * port simply because the ODP actions were composed for the wrong
1988 if (rule->cr.wc.wildcards || !flow_equal(flow, &rule->cr.flow)) {
1989 struct rule *super = rule->super ? rule->super : rule;
1990 if (xlate_actions(super->actions, super->n_actions, flow, ofproto,
1991 packet, &a, NULL, 0, NULL)) {
1992 ofpbuf_delete(packet);
1995 actions = a.actions;
1996 n_actions = a.n_actions;
1998 actions = rule->odp_actions;
1999 n_actions = rule->n_odp_actions;
2002 /* Execute the ODP actions. */
2003 flow_extract_stats(flow, packet, &stats);
2004 if (execute_odp_actions(ofproto, flow->in_port,
2005 actions, n_actions, packet)) {
2006 update_stats(ofproto, rule, &stats);
2007 rule->used = time_msec();
2008 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->used);
2012 /* Inserts 'rule' into 'p''s flow table.
2014 * If 'packet' is nonnull, takes ownership of 'packet', executes 'rule''s
2015 * actions on it and credits the statistics for sending the packet to 'rule'.
2016 * 'packet' must have at least sizeof(struct ofp_packet_in) bytes of
2019 rule_insert(struct ofproto *p, struct rule *rule, struct ofpbuf *packet,
2022 struct rule *displaced_rule;
2024 /* Insert the rule in the classifier. */
2025 displaced_rule = rule_from_cls_rule(classifier_insert(&p->cls, &rule->cr));
2026 if (!rule->cr.wc.wildcards) {
2027 rule_make_actions(p, rule, packet);
2030 /* Send the packet and credit it to the rule. */
2033 flow_extract(packet, 0, in_port, &flow);
2034 rule_execute(p, rule, packet, &flow);
2037 /* Install the rule in the datapath only after sending the packet, to
2038 * avoid packet reordering. */
2039 if (rule->cr.wc.wildcards) {
2040 COVERAGE_INC(ofproto_add_wc_flow);
2041 p->need_revalidate = true;
2043 rule_install(p, rule, displaced_rule);
2046 /* Free the rule that was displaced, if any. */
2047 if (displaced_rule) {
2048 rule_destroy(p, displaced_rule);
2052 static struct rule *
2053 rule_create_subrule(struct ofproto *ofproto, struct rule *rule,
2054 const struct flow *flow)
2056 struct rule *subrule = rule_create(ofproto, rule, NULL, 0,
2057 rule->idle_timeout, rule->hard_timeout,
2059 COVERAGE_INC(ofproto_subrule_create);
2060 cls_rule_from_flow(flow, 0, (rule->cr.priority <= UINT16_MAX ? UINT16_MAX
2061 : rule->cr.priority), &subrule->cr);
2063 if (classifier_insert(&ofproto->cls, &subrule->cr)) {
2071 /* Remove 'rule' from 'ofproto' and free up the associated memory:
2073 * - If 'rule' was installed in the datapath, uninstalls it and updates
2074 * 'rule''s statistics (or its super-rule's statistics, if it is a
2075 * subrule), via rule_uninstall().
2077 * - Removes 'rule' from the classifier.
2079 * - If 'rule' is a super-rule that has subrules, revalidates (and possibly
2080 * uninstalls and destroys) its subrules, via rule_destroy().
2083 rule_remove(struct ofproto *ofproto, struct rule *rule)
2085 if (rule->cr.wc.wildcards) {
2086 COVERAGE_INC(ofproto_del_wc_flow);
2087 ofproto->need_revalidate = true;
2089 rule_uninstall(ofproto, rule);
2091 classifier_remove(&ofproto->cls, &rule->cr);
2092 rule_destroy(ofproto, rule);
2095 /* Returns true if the actions changed, false otherwise. */
2097 rule_make_actions(struct ofproto *p, struct rule *rule,
2098 const struct ofpbuf *packet)
2100 const struct rule *super;
2101 struct odp_actions a;
2104 assert(!rule->cr.wc.wildcards);
2106 super = rule->super ? rule->super : rule;
2108 xlate_actions(super->actions, super->n_actions, &rule->cr.flow, p,
2109 packet, &a, &rule->tags, &rule->may_install,
2110 &rule->nf_flow.output_iface);
2112 actions_len = a.n_actions * sizeof *a.actions;
2113 if (rule->n_odp_actions != a.n_actions
2114 || memcmp(rule->odp_actions, a.actions, actions_len)) {
2115 COVERAGE_INC(ofproto_odp_unchanged);
2116 free(rule->odp_actions);
2117 rule->n_odp_actions = a.n_actions;
2118 rule->odp_actions = xmemdup(a.actions, actions_len);
2126 do_put_flow(struct ofproto *ofproto, struct rule *rule, int flags,
2127 struct odp_flow_put *put)
2129 memset(&put->flow.stats, 0, sizeof put->flow.stats);
2130 odp_flow_key_from_flow(&put->flow.key, &rule->cr.flow);
2131 put->flow.actions = rule->odp_actions;
2132 put->flow.n_actions = rule->n_odp_actions;
2133 put->flow.flags = 0;
2135 return dpif_flow_put(ofproto->dpif, put);
2139 rule_install(struct ofproto *p, struct rule *rule, struct rule *displaced_rule)
2141 assert(!rule->cr.wc.wildcards);
2143 if (rule->may_install) {
2144 struct odp_flow_put put;
2145 if (!do_put_flow(p, rule,
2146 ODPPF_CREATE | ODPPF_MODIFY | ODPPF_ZERO_STATS,
2148 rule->installed = true;
2149 if (displaced_rule) {
2150 update_stats(p, displaced_rule, &put.flow.stats);
2151 rule_post_uninstall(p, displaced_rule);
2154 } else if (displaced_rule) {
2155 rule_uninstall(p, displaced_rule);
2160 rule_reinstall(struct ofproto *ofproto, struct rule *rule)
2162 if (rule->installed) {
2163 struct odp_flow_put put;
2164 COVERAGE_INC(ofproto_dp_missed);
2165 do_put_flow(ofproto, rule, ODPPF_CREATE | ODPPF_MODIFY, &put);
2167 rule_install(ofproto, rule, NULL);
2172 rule_update_actions(struct ofproto *ofproto, struct rule *rule)
2174 bool actions_changed;
2175 uint16_t new_out_iface, old_out_iface;
2177 old_out_iface = rule->nf_flow.output_iface;
2178 actions_changed = rule_make_actions(ofproto, rule, NULL);
2180 if (rule->may_install) {
2181 if (rule->installed) {
2182 if (actions_changed) {
2183 struct odp_flow_put put;
2184 do_put_flow(ofproto, rule, ODPPF_CREATE | ODPPF_MODIFY
2185 | ODPPF_ZERO_STATS, &put);
2186 update_stats(ofproto, rule, &put.flow.stats);
2188 /* Temporarily set the old output iface so that NetFlow
2189 * messages have the correct output interface for the old
2191 new_out_iface = rule->nf_flow.output_iface;
2192 rule->nf_flow.output_iface = old_out_iface;
2193 rule_post_uninstall(ofproto, rule);
2194 rule->nf_flow.output_iface = new_out_iface;
2197 rule_install(ofproto, rule, NULL);
2200 rule_uninstall(ofproto, rule);
2205 rule_account(struct ofproto *ofproto, struct rule *rule, uint64_t extra_bytes)
2207 uint64_t total_bytes = rule->byte_count + extra_bytes;
2209 if (ofproto->ofhooks->account_flow_cb
2210 && total_bytes > rule->accounted_bytes)
2212 ofproto->ofhooks->account_flow_cb(
2213 &rule->cr.flow, rule->tags, rule->odp_actions, rule->n_odp_actions,
2214 total_bytes - rule->accounted_bytes, ofproto->aux);
2215 rule->accounted_bytes = total_bytes;
2219 /* 'rule' must be an exact-match rule in 'p'.
2221 * If 'rule' is installed in the datapath, uninstalls it and updates's
2222 * statistics. If 'rule' is a subrule, the statistics that are updated are
2223 * actually its super-rule's statistics; otherwise 'rule''s own statistics are
2226 * If 'rule' is not installed, this function has no effect. */
2228 rule_uninstall(struct ofproto *p, struct rule *rule)
2230 assert(!rule->cr.wc.wildcards);
2231 if (rule->installed) {
2232 struct odp_flow odp_flow;
2234 odp_flow_key_from_flow(&odp_flow.key, &rule->cr.flow);
2235 odp_flow.actions = NULL;
2236 odp_flow.n_actions = 0;
2238 if (!dpif_flow_del(p->dpif, &odp_flow)) {
2239 update_stats(p, rule, &odp_flow.stats);
2241 rule->installed = false;
2243 rule_post_uninstall(p, rule);
2248 is_controller_rule(struct rule *rule)
2250 /* If the only action is send to the controller then don't report
2251 * NetFlow expiration messages since it is just part of the control
2252 * logic for the network and not real traffic. */
2256 && rule->super->n_actions == 1
2257 && action_outputs_to_port(&rule->super->actions[0],
2258 htons(OFPP_CONTROLLER)));
2262 rule_post_uninstall(struct ofproto *ofproto, struct rule *rule)
2264 struct rule *super = rule->super;
2266 rule_account(ofproto, rule, 0);
2268 if (ofproto->netflow && !is_controller_rule(rule)) {
2269 struct ofexpired expired;
2270 expired.flow = rule->cr.flow;
2271 expired.packet_count = rule->packet_count;
2272 expired.byte_count = rule->byte_count;
2273 expired.used = rule->used;
2274 netflow_expire(ofproto->netflow, &rule->nf_flow, &expired);
2277 super->packet_count += rule->packet_count;
2278 super->byte_count += rule->byte_count;
2280 /* Reset counters to prevent double counting if the rule ever gets
2282 rule->packet_count = 0;
2283 rule->byte_count = 0;
2284 rule->accounted_bytes = 0;
2286 netflow_flow_clear(&rule->nf_flow);
2291 queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn,
2292 struct rconn_packet_counter *counter)
2294 update_openflow_length(msg);
2295 if (rconn_send(ofconn->rconn, msg, counter)) {
2301 send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh,
2304 struct ofpbuf *buf = make_ofp_error_msg(error, oh);
2306 COVERAGE_INC(ofproto_error);
2307 queue_tx(buf, ofconn, ofconn->reply_counter);
2312 hton_ofp_phy_port(struct ofp_phy_port *opp)
2314 opp->port_no = htons(opp->port_no);
2315 opp->config = htonl(opp->config);
2316 opp->state = htonl(opp->state);
2317 opp->curr = htonl(opp->curr);
2318 opp->advertised = htonl(opp->advertised);
2319 opp->supported = htonl(opp->supported);
2320 opp->peer = htonl(opp->peer);
2324 handle_echo_request(struct ofconn *ofconn, struct ofp_header *oh)
2326 struct ofp_header *rq = oh;
2327 queue_tx(make_echo_reply(rq), ofconn, ofconn->reply_counter);
2332 handle_features_request(struct ofconn *ofconn, struct ofp_header *oh)
2334 struct ofp_switch_features *osf;
2336 struct ofport *port;
2338 osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
2339 osf->datapath_id = htonll(ofconn->ofproto->datapath_id);
2340 osf->n_buffers = htonl(pktbuf_capacity());
2342 osf->capabilities = htonl(OFPC_FLOW_STATS | OFPC_TABLE_STATS |
2343 OFPC_PORT_STATS | OFPC_ARP_MATCH_IP);
2344 osf->actions = htonl((1u << OFPAT_OUTPUT) |
2345 (1u << OFPAT_SET_VLAN_VID) |
2346 (1u << OFPAT_SET_VLAN_PCP) |
2347 (1u << OFPAT_STRIP_VLAN) |
2348 (1u << OFPAT_SET_DL_SRC) |
2349 (1u << OFPAT_SET_DL_DST) |
2350 (1u << OFPAT_SET_NW_SRC) |
2351 (1u << OFPAT_SET_NW_DST) |
2352 (1u << OFPAT_SET_NW_TOS) |
2353 (1u << OFPAT_SET_TP_SRC) |
2354 (1u << OFPAT_SET_TP_DST) |
2355 (1u << OFPAT_ENQUEUE));
2357 HMAP_FOR_EACH (port, hmap_node, &ofconn->ofproto->ports) {
2358 hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
2361 queue_tx(buf, ofconn, ofconn->reply_counter);
2366 handle_get_config_request(struct ofconn *ofconn, struct ofp_header *oh)
2369 struct ofp_switch_config *osc;
2373 /* Figure out flags. */
2374 dpif_get_drop_frags(ofconn->ofproto->dpif, &drop_frags);
2375 flags = drop_frags ? OFPC_FRAG_DROP : OFPC_FRAG_NORMAL;
2378 osc = make_openflow_xid(sizeof *osc, OFPT_GET_CONFIG_REPLY, oh->xid, &buf);
2379 osc->flags = htons(flags);
2380 osc->miss_send_len = htons(ofconn->miss_send_len);
2381 queue_tx(buf, ofconn, ofconn->reply_counter);
2387 handle_set_config(struct ofconn *ofconn, struct ofp_switch_config *osc)
2392 error = check_ofp_message(&osc->header, OFPT_SET_CONFIG, sizeof *osc);
2396 flags = ntohs(osc->flags);
2398 if (ofconn->type == OFCONN_PRIMARY && ofconn->role != NX_ROLE_SLAVE) {
2399 switch (flags & OFPC_FRAG_MASK) {
2400 case OFPC_FRAG_NORMAL:
2401 dpif_set_drop_frags(ofconn->ofproto->dpif, false);
2403 case OFPC_FRAG_DROP:
2404 dpif_set_drop_frags(ofconn->ofproto->dpif, true);
2407 VLOG_WARN_RL(&rl, "requested bad fragment mode (flags=%"PRIx16")",
2413 ofconn->miss_send_len = ntohs(osc->miss_send_len);
2419 add_controller_action(struct odp_actions *actions, uint16_t max_len)
2421 union odp_action *a = odp_actions_add(actions, ODPAT_CONTROLLER);
2422 a->controller.arg = max_len;
2425 struct action_xlate_ctx {
2427 struct flow flow; /* Flow to which these actions correspond. */
2428 int recurse; /* Recursion level, via xlate_table_action. */
2429 struct ofproto *ofproto;
2430 const struct ofpbuf *packet; /* The packet corresponding to 'flow', or a
2431 * null pointer if we are revalidating
2432 * without a packet to refer to. */
2435 struct odp_actions *out; /* Datapath actions. */
2436 tag_type *tags; /* Tags associated with OFPP_NORMAL actions. */
2437 bool may_set_up_flow; /* True ordinarily; false if the actions must
2438 * be reassessed for every packet. */
2439 uint16_t nf_output_iface; /* Output interface index for NetFlow. */
2442 /* Maximum depth of flow table recursion (due to NXAST_RESUBMIT actions) in a
2443 * flow translation. */
2444 #define MAX_RESUBMIT_RECURSION 8
2446 static void do_xlate_actions(const union ofp_action *in, size_t n_in,
2447 struct action_xlate_ctx *ctx);
2450 add_output_action(struct action_xlate_ctx *ctx, uint16_t port)
2452 const struct ofport *ofport = get_port(ctx->ofproto, port);
2455 if (ofport->opp.config & OFPPC_NO_FWD) {
2456 /* Forwarding disabled on port. */
2461 * We don't have an ofport record for this port, but it doesn't hurt to
2462 * allow forwarding to it anyhow. Maybe such a port will appear later
2463 * and we're pre-populating the flow table.
2467 odp_actions_add(ctx->out, ODPAT_OUTPUT)->output.port = port;
2468 ctx->nf_output_iface = port;
2471 static struct rule *
2472 lookup_valid_rule(struct ofproto *ofproto, const struct flow *flow)
2475 rule = rule_from_cls_rule(classifier_lookup(&ofproto->cls, flow,
2478 /* The rule we found might not be valid, since we could be in need of
2479 * revalidation. If it is not valid, don't return it. */
2482 && ofproto->need_revalidate
2483 && !revalidate_rule(ofproto, rule)) {
2484 COVERAGE_INC(ofproto_invalidated);
2492 xlate_table_action(struct action_xlate_ctx *ctx, uint16_t in_port)
2494 if (ctx->recurse < MAX_RESUBMIT_RECURSION) {
2495 uint16_t old_in_port;
2498 /* Look up a flow with 'in_port' as the input port. Then restore the
2499 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2500 * have surprising behavior). */
2501 old_in_port = ctx->flow.in_port;
2502 ctx->flow.in_port = in_port;
2503 rule = lookup_valid_rule(ctx->ofproto, &ctx->flow);
2504 ctx->flow.in_port = old_in_port;
2512 do_xlate_actions(rule->actions, rule->n_actions, ctx);
2516 struct vlog_rate_limit recurse_rl = VLOG_RATE_LIMIT_INIT(1, 1);
2518 VLOG_ERR_RL(&recurse_rl, "NXAST_RESUBMIT recursed over %d times",
2519 MAX_RESUBMIT_RECURSION);
2524 flood_packets(struct ofproto *ofproto, uint16_t odp_in_port, uint32_t mask,
2525 uint16_t *nf_output_iface, struct odp_actions *actions)
2527 struct ofport *ofport;
2529 HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
2530 uint16_t odp_port = ofport->odp_port;
2531 if (odp_port != odp_in_port && !(ofport->opp.config & mask)) {
2532 odp_actions_add(actions, ODPAT_OUTPUT)->output.port = odp_port;
2535 *nf_output_iface = NF_OUT_FLOOD;
2539 xlate_output_action__(struct action_xlate_ctx *ctx,
2540 uint16_t port, uint16_t max_len)
2543 uint16_t prev_nf_output_iface = ctx->nf_output_iface;
2545 ctx->nf_output_iface = NF_OUT_DROP;
2549 add_output_action(ctx, ctx->flow.in_port);
2552 xlate_table_action(ctx, ctx->flow.in_port);
2555 if (!ctx->ofproto->ofhooks->normal_cb(&ctx->flow, ctx->packet,
2556 ctx->out, ctx->tags,
2557 &ctx->nf_output_iface,
2558 ctx->ofproto->aux)) {
2559 COVERAGE_INC(ofproto_uninstallable);
2560 ctx->may_set_up_flow = false;
2564 flood_packets(ctx->ofproto, ctx->flow.in_port, OFPPC_NO_FLOOD,
2565 &ctx->nf_output_iface, ctx->out);
2568 flood_packets(ctx->ofproto, ctx->flow.in_port, 0,
2569 &ctx->nf_output_iface, ctx->out);
2571 case OFPP_CONTROLLER:
2572 add_controller_action(ctx->out, max_len);
2575 add_output_action(ctx, ODPP_LOCAL);
2578 odp_port = ofp_port_to_odp_port(port);
2579 if (odp_port != ctx->flow.in_port) {
2580 add_output_action(ctx, odp_port);
2585 if (prev_nf_output_iface == NF_OUT_FLOOD) {
2586 ctx->nf_output_iface = NF_OUT_FLOOD;
2587 } else if (ctx->nf_output_iface == NF_OUT_DROP) {
2588 ctx->nf_output_iface = prev_nf_output_iface;
2589 } else if (prev_nf_output_iface != NF_OUT_DROP &&
2590 ctx->nf_output_iface != NF_OUT_FLOOD) {
2591 ctx->nf_output_iface = NF_OUT_MULTI;
2596 xlate_output_action(struct action_xlate_ctx *ctx,
2597 const struct ofp_action_output *oao)
2599 xlate_output_action__(ctx, ntohs(oao->port), ntohs(oao->max_len));
2602 /* If the final ODP action in 'ctx' is "pop priority", drop it, as an
2603 * optimization, because we're going to add another action that sets the
2604 * priority immediately after, or because there are no actions following the
2607 remove_pop_action(struct action_xlate_ctx *ctx)
2609 size_t n = ctx->out->n_actions;
2610 if (n > 0 && ctx->out->actions[n - 1].type == ODPAT_POP_PRIORITY) {
2611 ctx->out->n_actions--;
2616 xlate_enqueue_action(struct action_xlate_ctx *ctx,
2617 const struct ofp_action_enqueue *oae)
2619 uint16_t ofp_port, odp_port;
2623 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(oae->queue_id),
2626 /* Fall back to ordinary output action. */
2627 xlate_output_action__(ctx, ntohs(oae->port), 0);
2631 /* Figure out ODP output port. */
2632 ofp_port = ntohs(oae->port);
2633 if (ofp_port != OFPP_IN_PORT) {
2634 odp_port = ofp_port_to_odp_port(ofp_port);
2636 odp_port = ctx->flow.in_port;
2639 /* Add ODP actions. */
2640 remove_pop_action(ctx);
2641 odp_actions_add(ctx->out, ODPAT_SET_PRIORITY)->priority.priority
2643 add_output_action(ctx, odp_port);
2644 odp_actions_add(ctx->out, ODPAT_POP_PRIORITY);
2646 /* Update NetFlow output port. */
2647 if (ctx->nf_output_iface == NF_OUT_DROP) {
2648 ctx->nf_output_iface = odp_port;
2649 } else if (ctx->nf_output_iface != NF_OUT_FLOOD) {
2650 ctx->nf_output_iface = NF_OUT_MULTI;
2655 xlate_set_queue_action(struct action_xlate_ctx *ctx,
2656 const struct nx_action_set_queue *nasq)
2661 error = dpif_queue_to_priority(ctx->ofproto->dpif, ntohl(nasq->queue_id),
2664 /* Couldn't translate queue to a priority, so ignore. A warning
2665 * has already been logged. */
2669 remove_pop_action(ctx);
2670 odp_actions_add(ctx->out, ODPAT_SET_PRIORITY)->priority.priority
2675 xlate_nicira_action(struct action_xlate_ctx *ctx,
2676 const struct nx_action_header *nah)
2678 const struct nx_action_resubmit *nar;
2679 const struct nx_action_set_tunnel *nast;
2680 const struct nx_action_set_queue *nasq;
2681 union odp_action *oa;
2682 int subtype = ntohs(nah->subtype);
2684 assert(nah->vendor == htonl(NX_VENDOR_ID));
2686 case NXAST_RESUBMIT:
2687 nar = (const struct nx_action_resubmit *) nah;
2688 xlate_table_action(ctx, ofp_port_to_odp_port(ntohs(nar->in_port)));
2691 case NXAST_SET_TUNNEL:
2692 nast = (const struct nx_action_set_tunnel *) nah;
2693 oa = odp_actions_add(ctx->out, ODPAT_SET_TUNNEL);
2694 ctx->flow.tun_id = oa->tunnel.tun_id = nast->tun_id;
2697 case NXAST_DROP_SPOOFED_ARP:
2698 if (ctx->flow.dl_type == htons(ETH_TYPE_ARP)) {
2699 odp_actions_add(ctx->out, ODPAT_DROP_SPOOFED_ARP);
2703 case NXAST_SET_QUEUE:
2704 nasq = (const struct nx_action_set_queue *) nah;
2705 xlate_set_queue_action(ctx, nasq);
2708 case NXAST_POP_QUEUE:
2709 odp_actions_add(ctx->out, ODPAT_POP_PRIORITY);
2712 /* If you add a new action here that modifies flow data, don't forget to
2713 * update the flow key in ctx->flow at the same time. */
2716 VLOG_DBG_RL(&rl, "unknown Nicira action type %"PRIu16, subtype);
2722 do_xlate_actions(const union ofp_action *in, size_t n_in,
2723 struct action_xlate_ctx *ctx)
2725 struct actions_iterator iter;
2726 const union ofp_action *ia;
2727 const struct ofport *port;
2729 port = get_port(ctx->ofproto, ctx->flow.in_port);
2730 if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
2731 port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
2732 ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
2733 /* Drop this flow. */
2737 for (ia = actions_first(&iter, in, n_in); ia; ia = actions_next(&iter)) {
2738 uint16_t type = ntohs(ia->type);
2739 union odp_action *oa;
2743 xlate_output_action(ctx, &ia->output);
2746 case OFPAT_SET_VLAN_VID:
2747 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_TCI);
2748 oa->dl_tci.tci = ia->vlan_vid.vlan_vid;
2749 oa->dl_tci.tci |= htons(ctx->flow.dl_vlan_pcp << VLAN_PCP_SHIFT);
2750 ctx->flow.dl_vlan = ia->vlan_vid.vlan_vid;
2753 case OFPAT_SET_VLAN_PCP:
2754 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_TCI);
2755 oa->dl_tci.tci = htons(ia->vlan_pcp.vlan_pcp << VLAN_PCP_SHIFT);
2756 oa->dl_tci.tci |= ctx->flow.dl_vlan;
2757 ctx->flow.dl_vlan_pcp = ia->vlan_pcp.vlan_pcp;
2760 case OFPAT_STRIP_VLAN:
2761 odp_actions_add(ctx->out, ODPAT_STRIP_VLAN);
2762 ctx->flow.dl_vlan = htons(OFP_VLAN_NONE);
2763 ctx->flow.dl_vlan_pcp = 0;
2766 case OFPAT_SET_DL_SRC:
2767 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_SRC);
2768 memcpy(oa->dl_addr.dl_addr,
2769 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2770 memcpy(ctx->flow.dl_src,
2771 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2774 case OFPAT_SET_DL_DST:
2775 oa = odp_actions_add(ctx->out, ODPAT_SET_DL_DST);
2776 memcpy(oa->dl_addr.dl_addr,
2777 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2778 memcpy(ctx->flow.dl_dst,
2779 ((struct ofp_action_dl_addr *) ia)->dl_addr, ETH_ADDR_LEN);
2782 case OFPAT_SET_NW_SRC:
2783 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_SRC);
2784 ctx->flow.nw_src = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
2787 case OFPAT_SET_NW_DST:
2788 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_DST);
2789 ctx->flow.nw_dst = oa->nw_addr.nw_addr = ia->nw_addr.nw_addr;
2792 case OFPAT_SET_NW_TOS:
2793 oa = odp_actions_add(ctx->out, ODPAT_SET_NW_TOS);
2794 ctx->flow.nw_tos = oa->nw_tos.nw_tos = ia->nw_tos.nw_tos;
2797 case OFPAT_SET_TP_SRC:
2798 oa = odp_actions_add(ctx->out, ODPAT_SET_TP_SRC);
2799 ctx->flow.tp_src = oa->tp_port.tp_port = ia->tp_port.tp_port;
2802 case OFPAT_SET_TP_DST:
2803 oa = odp_actions_add(ctx->out, ODPAT_SET_TP_DST);
2804 ctx->flow.tp_dst = oa->tp_port.tp_port = ia->tp_port.tp_port;
2808 xlate_nicira_action(ctx, (const struct nx_action_header *) ia);
2812 xlate_enqueue_action(ctx, (const struct ofp_action_enqueue *) ia);
2816 VLOG_DBG_RL(&rl, "unknown action type %"PRIu16, type);
2823 xlate_actions(const union ofp_action *in, size_t n_in,
2824 const struct flow *flow, struct ofproto *ofproto,
2825 const struct ofpbuf *packet,
2826 struct odp_actions *out, tag_type *tags, bool *may_set_up_flow,
2827 uint16_t *nf_output_iface)
2829 tag_type no_tags = 0;
2830 struct action_xlate_ctx ctx;
2831 COVERAGE_INC(ofproto_ofp2odp);
2832 odp_actions_init(out);
2835 ctx.ofproto = ofproto;
2836 ctx.packet = packet;
2838 ctx.tags = tags ? tags : &no_tags;
2839 ctx.may_set_up_flow = true;
2840 ctx.nf_output_iface = NF_OUT_DROP;
2841 do_xlate_actions(in, n_in, &ctx);
2842 remove_pop_action(&ctx);
2844 /* Check with in-band control to see if we're allowed to set up this
2846 if (!in_band_rule_check(ofproto->in_band, flow, out)) {
2847 ctx.may_set_up_flow = false;
2850 if (may_set_up_flow) {
2851 *may_set_up_flow = ctx.may_set_up_flow;
2853 if (nf_output_iface) {
2854 *nf_output_iface = ctx.nf_output_iface;
2856 if (odp_actions_overflow(out)) {
2857 COVERAGE_INC(odp_overflow);
2858 odp_actions_init(out);
2859 return ofp_mkerr(OFPET_BAD_ACTION, OFPBAC_TOO_MANY);
2864 /* Checks whether 'ofconn' is a slave controller. If so, returns an OpenFlow
2865 * error message code (composed with ofp_mkerr()) for the caller to propagate
2866 * upward. Otherwise, returns 0.
2868 * The log message mentions 'msg_type'. */
2870 reject_slave_controller(struct ofconn *ofconn, const const char *msg_type)
2872 if (ofconn->type == OFCONN_PRIMARY && ofconn->role == NX_ROLE_SLAVE) {
2873 static struct vlog_rate_limit perm_rl = VLOG_RATE_LIMIT_INIT(1, 5);
2874 VLOG_WARN_RL(&perm_rl, "rejecting %s message from slave controller",
2877 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
2884 handle_packet_out(struct ofconn *ofconn, struct ofp_header *oh)
2886 struct ofproto *p = ofconn->ofproto;
2887 struct ofp_packet_out *opo;
2888 struct ofpbuf payload, *buffer;
2889 struct odp_actions actions;
2895 error = reject_slave_controller(ofconn, "OFPT_PACKET_OUT");
2900 error = check_ofp_packet_out(oh, &payload, &n_actions, p->max_ports);
2904 opo = (struct ofp_packet_out *) oh;
2906 COVERAGE_INC(ofproto_packet_out);
2907 if (opo->buffer_id != htonl(UINT32_MAX)) {
2908 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(opo->buffer_id),
2910 if (error || !buffer) {
2918 flow_extract(&payload, 0, ofp_port_to_odp_port(ntohs(opo->in_port)), &flow);
2919 error = xlate_actions((const union ofp_action *) opo->actions, n_actions,
2920 &flow, p, &payload, &actions, NULL, NULL, NULL);
2922 dpif_execute(p->dpif, actions.actions, actions.n_actions, &payload);
2924 ofpbuf_delete(buffer);
2930 update_port_config(struct ofproto *p, struct ofport *port,
2931 uint32_t config, uint32_t mask)
2933 mask &= config ^ port->opp.config;
2934 if (mask & OFPPC_PORT_DOWN) {
2935 if (config & OFPPC_PORT_DOWN) {
2936 netdev_turn_flags_off(port->netdev, NETDEV_UP, true);
2938 netdev_turn_flags_on(port->netdev, NETDEV_UP, true);
2941 #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | \
2942 OFPPC_NO_FWD | OFPPC_NO_FLOOD)
2943 if (mask & REVALIDATE_BITS) {
2944 COVERAGE_INC(ofproto_costly_flags);
2945 port->opp.config ^= mask & REVALIDATE_BITS;
2946 p->need_revalidate = true;
2948 #undef REVALIDATE_BITS
2949 if (mask & OFPPC_NO_PACKET_IN) {
2950 port->opp.config ^= OFPPC_NO_PACKET_IN;
2955 handle_port_mod(struct ofconn *ofconn, struct ofp_header *oh)
2957 struct ofproto *p = ofconn->ofproto;
2958 const struct ofp_port_mod *opm;
2959 struct ofport *port;
2962 error = reject_slave_controller(ofconn, "OFPT_PORT_MOD");
2966 error = check_ofp_message(oh, OFPT_PORT_MOD, sizeof *opm);
2970 opm = (struct ofp_port_mod *) oh;
2972 port = get_port(p, ofp_port_to_odp_port(ntohs(opm->port_no)));
2974 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
2975 } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
2976 return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_HW_ADDR);
2978 update_port_config(p, port, ntohl(opm->config), ntohl(opm->mask));
2979 if (opm->advertise) {
2980 netdev_set_advertisements(port->netdev, ntohl(opm->advertise));
2986 static struct ofpbuf *
2987 make_stats_reply(ovs_be32 xid, ovs_be16 type, size_t body_len)
2989 struct ofp_stats_reply *osr;
2992 msg = ofpbuf_new(MIN(sizeof *osr + body_len, UINT16_MAX));
2993 osr = put_openflow_xid(sizeof *osr, OFPT_STATS_REPLY, xid, msg);
2995 osr->flags = htons(0);
2999 static struct ofpbuf *
3000 start_stats_reply(const struct ofp_stats_request *request, size_t body_len)
3002 return make_stats_reply(request->header.xid, request->type, body_len);
3006 append_stats_reply(size_t nbytes, struct ofconn *ofconn, struct ofpbuf **msgp)
3008 struct ofpbuf *msg = *msgp;
3009 assert(nbytes <= UINT16_MAX - sizeof(struct ofp_stats_reply));
3010 if (nbytes + msg->size > UINT16_MAX) {
3011 struct ofp_stats_reply *reply = msg->data;
3012 reply->flags = htons(OFPSF_REPLY_MORE);
3013 *msgp = make_stats_reply(reply->header.xid, reply->type, nbytes);
3014 queue_tx(msg, ofconn, ofconn->reply_counter);
3016 return ofpbuf_put_uninit(*msgp, nbytes);
3020 handle_desc_stats_request(struct ofconn *ofconn,
3021 struct ofp_stats_request *request)
3023 struct ofproto *p = ofconn->ofproto;
3024 struct ofp_desc_stats *ods;
3027 msg = start_stats_reply(request, sizeof *ods);
3028 ods = append_stats_reply(sizeof *ods, ofconn, &msg);
3029 memset(ods, 0, sizeof *ods);
3030 ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
3031 ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
3032 ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
3033 ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
3034 ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
3035 queue_tx(msg, ofconn, ofconn->reply_counter);
3041 handle_table_stats_request(struct ofconn *ofconn,
3042 struct ofp_stats_request *request)
3044 struct ofproto *p = ofconn->ofproto;
3045 struct ofp_table_stats *ots;
3050 msg = start_stats_reply(request, sizeof *ots * 2);
3052 /* Count rules other than subrules. */
3053 n_rules = classifier_count(&p->cls);
3054 CLASSIFIER_FOR_EACH_EXACT_RULE (rule, cr, &p->cls) {
3060 /* Classifier table. */
3061 ots = append_stats_reply(sizeof *ots, ofconn, &msg);
3062 memset(ots, 0, sizeof *ots);
3063 strcpy(ots->name, "classifier");
3064 ots->wildcards = (ofconn->flow_format == NXFF_OPENFLOW10
3065 ? htonl(OFPFW_ALL) : htonl(OVSFW_ALL));
3066 ots->max_entries = htonl(1024 * 1024); /* An arbitrary big number. */
3067 ots->active_count = htonl(n_rules);
3068 ots->lookup_count = htonll(0); /* XXX */
3069 ots->matched_count = htonll(0); /* XXX */
3071 queue_tx(msg, ofconn, ofconn->reply_counter);
3076 append_port_stat(struct ofport *port, struct ofconn *ofconn,
3077 struct ofpbuf **msgp)
3079 struct netdev_stats stats;
3080 struct ofp_port_stats *ops;
3082 /* Intentionally ignore return value, since errors will set
3083 * 'stats' to all-1s, which is correct for OpenFlow, and
3084 * netdev_get_stats() will log errors. */
3085 netdev_get_stats(port->netdev, &stats);
3087 ops = append_stats_reply(sizeof *ops, ofconn, msgp);
3088 ops->port_no = htons(port->opp.port_no);
3089 memset(ops->pad, 0, sizeof ops->pad);
3090 ops->rx_packets = htonll(stats.rx_packets);
3091 ops->tx_packets = htonll(stats.tx_packets);
3092 ops->rx_bytes = htonll(stats.rx_bytes);
3093 ops->tx_bytes = htonll(stats.tx_bytes);
3094 ops->rx_dropped = htonll(stats.rx_dropped);
3095 ops->tx_dropped = htonll(stats.tx_dropped);
3096 ops->rx_errors = htonll(stats.rx_errors);
3097 ops->tx_errors = htonll(stats.tx_errors);
3098 ops->rx_frame_err = htonll(stats.rx_frame_errors);
3099 ops->rx_over_err = htonll(stats.rx_over_errors);
3100 ops->rx_crc_err = htonll(stats.rx_crc_errors);
3101 ops->collisions = htonll(stats.collisions);
3105 handle_port_stats_request(struct ofconn *ofconn, struct ofp_stats_request *osr,
3108 struct ofproto *p = ofconn->ofproto;
3109 struct ofp_port_stats_request *psr;
3110 struct ofp_port_stats *ops;
3112 struct ofport *port;
3114 if (arg_size != sizeof *psr) {
3115 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3117 psr = (struct ofp_port_stats_request *) osr->body;
3119 msg = start_stats_reply(osr, sizeof *ops * 16);
3120 if (psr->port_no != htons(OFPP_NONE)) {
3121 port = get_port(p, ofp_port_to_odp_port(ntohs(psr->port_no)));
3123 append_port_stat(port, ofconn, &msg);
3126 HMAP_FOR_EACH (port, hmap_node, &p->ports) {
3127 append_port_stat(port, ofconn, &msg);
3131 queue_tx(msg, ofconn, ofconn->reply_counter);
3135 struct flow_stats_cbdata {
3136 struct ofconn *ofconn;
3141 /* Obtains statistic counters for 'rule' within 'p' and stores them into
3142 * '*packet_countp' and '*byte_countp'. If 'rule' is a wildcarded rule, the
3143 * returned statistic include statistics for all of 'rule''s subrules. */
3145 query_stats(struct ofproto *p, struct rule *rule,
3146 uint64_t *packet_countp, uint64_t *byte_countp)
3148 uint64_t packet_count, byte_count;
3149 struct rule *subrule;
3150 struct odp_flow *odp_flows;
3153 /* Start from historical data for 'rule' itself that are no longer tracked
3154 * by the datapath. This counts, for example, subrules that have
3156 packet_count = rule->packet_count;
3157 byte_count = rule->byte_count;
3159 /* Prepare to ask the datapath for statistics on 'rule', or if it is
3160 * wildcarded then on all of its subrules.
3162 * Also, add any statistics that are not tracked by the datapath for each
3163 * subrule. This includes, for example, statistics for packets that were
3164 * executed "by hand" by ofproto via dpif_execute() but must be accounted
3166 n_odp_flows = rule->cr.wc.wildcards ? list_size(&rule->list) : 1;
3167 odp_flows = xzalloc(n_odp_flows * sizeof *odp_flows);
3168 if (rule->cr.wc.wildcards) {
3170 LIST_FOR_EACH (subrule, list, &rule->list) {
3171 odp_flow_key_from_flow(&odp_flows[i++].key, &subrule->cr.flow);
3172 packet_count += subrule->packet_count;
3173 byte_count += subrule->byte_count;
3176 odp_flow_key_from_flow(&odp_flows[0].key, &rule->cr.flow);
3179 /* Fetch up-to-date statistics from the datapath and add them in. */
3180 if (!dpif_flow_get_multiple(p->dpif, odp_flows, n_odp_flows)) {
3182 for (i = 0; i < n_odp_flows; i++) {
3183 struct odp_flow *odp_flow = &odp_flows[i];
3184 packet_count += odp_flow->stats.n_packets;
3185 byte_count += odp_flow->stats.n_bytes;
3190 /* Return the stats to the caller. */
3191 *packet_countp = packet_count;
3192 *byte_countp = byte_count;
3196 calc_flow_duration(long long int start, ovs_be32 *sec, ovs_be32 *nsec)
3198 long long int msecs = time_msec() - start;
3199 *sec = htonl(msecs / 1000);
3200 *nsec = htonl((msecs % 1000) * (1000 * 1000));
3204 flow_stats_cb(struct cls_rule *rule_, void *cbdata_)
3206 struct rule *rule = rule_from_cls_rule(rule_);
3207 struct flow_stats_cbdata *cbdata = cbdata_;
3208 struct ofp_flow_stats *ofs;
3209 uint64_t packet_count, byte_count;
3210 size_t act_len, len;
3212 if (rule_is_hidden(rule) || !rule_has_out_port(rule, cbdata->out_port)) {
3216 act_len = sizeof *rule->actions * rule->n_actions;
3217 len = offsetof(struct ofp_flow_stats, actions) + act_len;
3219 query_stats(cbdata->ofconn->ofproto, rule, &packet_count, &byte_count);
3221 ofs = append_stats_reply(len, cbdata->ofconn, &cbdata->msg);
3222 ofs->length = htons(len);
3225 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards,
3226 cbdata->ofconn->flow_format, &ofs->match);
3227 calc_flow_duration(rule->created, &ofs->duration_sec, &ofs->duration_nsec);
3228 ofs->cookie = rule->flow_cookie;
3229 ofs->priority = htons(rule->cr.priority);
3230 ofs->idle_timeout = htons(rule->idle_timeout);
3231 ofs->hard_timeout = htons(rule->hard_timeout);
3232 memset(ofs->pad2, 0, sizeof ofs->pad2);
3233 ofs->packet_count = htonll(packet_count);
3234 ofs->byte_count = htonll(byte_count);
3235 if (rule->n_actions > 0) {
3236 memcpy(ofs->actions, rule->actions, act_len);
3241 table_id_to_include(uint8_t table_id)
3243 return table_id == 0 || table_id == 0xff ? CLS_INC_ALL : 0;
3247 handle_flow_stats_request(struct ofconn *ofconn,
3248 const struct ofp_stats_request *osr, size_t arg_size)
3250 struct ofp_flow_stats_request *fsr;
3251 struct flow_stats_cbdata cbdata;
3252 struct cls_rule target;
3254 if (arg_size != sizeof *fsr) {
3255 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3257 fsr = (struct ofp_flow_stats_request *) osr->body;
3259 COVERAGE_INC(ofproto_flows_req);
3260 cbdata.ofconn = ofconn;
3261 cbdata.out_port = fsr->out_port;
3262 cbdata.msg = start_stats_reply(osr, 1024);
3263 cls_rule_from_match(&fsr->match, 0, NXFF_OPENFLOW10, 0, &target);
3264 classifier_for_each_match(&ofconn->ofproto->cls, &target,
3265 table_id_to_include(fsr->table_id),
3266 flow_stats_cb, &cbdata);
3267 queue_tx(cbdata.msg, ofconn, ofconn->reply_counter);
3271 struct flow_stats_ds_cbdata {
3272 struct ofproto *ofproto;
3277 flow_stats_ds_cb(struct cls_rule *rule_, void *cbdata_)
3279 struct rule *rule = rule_from_cls_rule(rule_);
3280 struct flow_stats_ds_cbdata *cbdata = cbdata_;
3281 struct ds *results = cbdata->results;
3282 struct ofp_match match;
3283 uint64_t packet_count, byte_count;
3284 size_t act_len = sizeof *rule->actions * rule->n_actions;
3286 /* Don't report on subrules. */
3287 if (rule->super != NULL) {
3291 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
3292 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards,
3293 NXFF_OPENFLOW10, &match);
3295 ds_put_format(results, "duration=%llds, ",
3296 (time_msec() - rule->created) / 1000);
3297 ds_put_format(results, "priority=%u, ", rule->cr.priority);
3298 ds_put_format(results, "n_packets=%"PRIu64", ", packet_count);
3299 ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
3300 ofp_print_match(results, &match, true);
3302 ofp_print_actions(results, &rule->actions->header, act_len);
3304 ds_put_cstr(results, "drop");
3306 ds_put_cstr(results, "\n");
3309 /* Adds a pretty-printed description of all flows to 'results', including
3310 * those marked hidden by secchan (e.g., by in-band control). */
3312 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
3314 struct ofp_match match;
3315 struct cls_rule target;
3316 struct flow_stats_ds_cbdata cbdata;
3318 memset(&match, 0, sizeof match);
3319 match.wildcards = htonl(OVSFW_ALL);
3322 cbdata.results = results;
3324 cls_rule_from_match(&match, 0, NXFF_OPENFLOW10, 0, &target);
3325 classifier_for_each_match(&p->cls, &target, CLS_INC_ALL,
3326 flow_stats_ds_cb, &cbdata);
3329 struct aggregate_stats_cbdata {
3330 struct ofproto *ofproto;
3332 uint64_t packet_count;
3333 uint64_t byte_count;
3338 aggregate_stats_cb(struct cls_rule *rule_, void *cbdata_)
3340 struct rule *rule = rule_from_cls_rule(rule_);
3341 struct aggregate_stats_cbdata *cbdata = cbdata_;
3342 uint64_t packet_count, byte_count;
3344 if (rule_is_hidden(rule) || !rule_has_out_port(rule, cbdata->out_port)) {
3348 query_stats(cbdata->ofproto, rule, &packet_count, &byte_count);
3350 cbdata->packet_count += packet_count;
3351 cbdata->byte_count += byte_count;
3356 query_aggregate_stats(struct ofproto *ofproto, struct cls_rule *target,
3357 uint16_t out_port, uint8_t table_id,
3358 struct ofp_aggregate_stats_reply *oasr)
3360 struct aggregate_stats_cbdata cbdata;
3362 COVERAGE_INC(ofproto_agg_request);
3363 cbdata.ofproto = ofproto;
3364 cbdata.out_port = out_port;
3365 cbdata.packet_count = 0;
3366 cbdata.byte_count = 0;
3368 classifier_for_each_match(&ofproto->cls, target,
3369 table_id_to_include(table_id),
3370 aggregate_stats_cb, &cbdata);
3372 oasr->flow_count = htonl(cbdata.n_flows);
3373 oasr->packet_count = htonll(cbdata.packet_count);
3374 oasr->byte_count = htonll(cbdata.byte_count);
3375 memset(oasr->pad, 0, sizeof oasr->pad);
3379 handle_aggregate_stats_request(struct ofconn *ofconn,
3380 const struct ofp_stats_request *osr,
3383 struct ofp_aggregate_stats_request *request;
3384 struct ofp_aggregate_stats_reply *reply;
3385 struct cls_rule target;
3388 if (arg_size != sizeof *request) {
3389 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3391 request = (struct ofp_aggregate_stats_request *) osr->body;
3393 cls_rule_from_match(&request->match, 0, NXFF_OPENFLOW10, 0, &target);
3395 msg = start_stats_reply(osr, sizeof *reply);
3396 reply = append_stats_reply(sizeof *reply, ofconn, &msg);
3397 query_aggregate_stats(ofconn->ofproto, &target, request->out_port,
3398 request->table_id, reply);
3399 queue_tx(msg, ofconn, ofconn->reply_counter);
3403 struct queue_stats_cbdata {
3404 struct ofconn *ofconn;
3405 struct ofport *ofport;
3410 put_queue_stats(struct queue_stats_cbdata *cbdata, uint32_t queue_id,
3411 const struct netdev_queue_stats *stats)
3413 struct ofp_queue_stats *reply;
3415 reply = append_stats_reply(sizeof *reply, cbdata->ofconn, &cbdata->msg);
3416 reply->port_no = htons(cbdata->ofport->opp.port_no);
3417 memset(reply->pad, 0, sizeof reply->pad);
3418 reply->queue_id = htonl(queue_id);
3419 reply->tx_bytes = htonll(stats->tx_bytes);
3420 reply->tx_packets = htonll(stats->tx_packets);
3421 reply->tx_errors = htonll(stats->tx_errors);
3425 handle_queue_stats_dump_cb(uint32_t queue_id,
3426 struct netdev_queue_stats *stats,
3429 struct queue_stats_cbdata *cbdata = cbdata_;
3431 put_queue_stats(cbdata, queue_id, stats);
3435 handle_queue_stats_for_port(struct ofport *port, uint32_t queue_id,
3436 struct queue_stats_cbdata *cbdata)
3438 cbdata->ofport = port;
3439 if (queue_id == OFPQ_ALL) {
3440 netdev_dump_queue_stats(port->netdev,
3441 handle_queue_stats_dump_cb, cbdata);
3443 struct netdev_queue_stats stats;
3445 if (!netdev_get_queue_stats(port->netdev, queue_id, &stats)) {
3446 put_queue_stats(cbdata, queue_id, &stats);
3452 handle_queue_stats_request(struct ofconn *ofconn,
3453 const struct ofp_stats_request *osr,
3456 struct ofproto *ofproto = ofconn->ofproto;
3457 struct ofp_queue_stats_request *qsr;
3458 struct queue_stats_cbdata cbdata;
3459 struct ofport *port;
3460 unsigned int port_no;
3463 if (arg_size != sizeof *qsr) {
3464 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3466 qsr = (struct ofp_queue_stats_request *) osr->body;
3468 COVERAGE_INC(ofproto_queue_req);
3470 cbdata.ofconn = ofconn;
3471 cbdata.msg = start_stats_reply(osr, 128);
3473 port_no = ntohs(qsr->port_no);
3474 queue_id = ntohl(qsr->queue_id);
3475 if (port_no == OFPP_ALL) {
3476 HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
3477 handle_queue_stats_for_port(port, queue_id, &cbdata);
3479 } else if (port_no < ofproto->max_ports) {
3480 port = get_port(ofproto, ofp_port_to_odp_port(port_no));
3482 handle_queue_stats_for_port(port, queue_id, &cbdata);
3485 ofpbuf_delete(cbdata.msg);
3486 return ofp_mkerr(OFPET_QUEUE_OP_FAILED, OFPQOFC_BAD_PORT);
3488 queue_tx(cbdata.msg, ofconn, ofconn->reply_counter);
3494 handle_stats_request(struct ofconn *ofconn, struct ofp_header *oh)
3496 struct ofp_stats_request *osr;
3500 error = check_ofp_message_array(oh, OFPT_STATS_REQUEST, sizeof *osr,
3505 osr = (struct ofp_stats_request *) oh;
3507 switch (ntohs(osr->type)) {
3509 return handle_desc_stats_request(ofconn, osr);
3512 return handle_flow_stats_request(ofconn, osr, arg_size);
3514 case OFPST_AGGREGATE:
3515 return handle_aggregate_stats_request(ofconn, osr, arg_size);
3518 return handle_table_stats_request(ofconn, osr);
3521 return handle_port_stats_request(ofconn, osr, arg_size);
3524 return handle_queue_stats_request(ofconn, osr, arg_size);
3527 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
3530 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_STAT);
3534 static long long int
3535 msec_from_nsec(uint64_t sec, uint32_t nsec)
3537 return !sec ? 0 : sec * 1000 + nsec / 1000000;
3541 update_time(struct ofproto *ofproto, struct rule *rule,
3542 const struct odp_flow_stats *stats)
3544 long long int used = msec_from_nsec(stats->used_sec, stats->used_nsec);
3545 if (used > rule->used) {
3547 if (rule->super && used > rule->super->used) {
3548 rule->super->used = used;
3550 netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, used);
3555 update_stats(struct ofproto *ofproto, struct rule *rule,
3556 const struct odp_flow_stats *stats)
3558 if (stats->n_packets) {
3559 update_time(ofproto, rule, stats);
3560 rule->packet_count += stats->n_packets;
3561 rule->byte_count += stats->n_bytes;
3562 netflow_flow_update_flags(&rule->nf_flow, stats->tcp_flags);
3566 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
3567 * in which no matching flow already exists in the flow table.
3569 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
3570 * ofp_actions, to ofconn->ofproto's flow table. Returns 0 on success or an
3571 * OpenFlow error code as encoded by ofp_mkerr() on failure.
3573 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3576 add_flow(struct ofconn *ofconn, const struct ofp_flow_mod *ofm,
3579 struct ofproto *p = ofconn->ofproto;
3580 struct ofpbuf *packet;
3585 if (ofm->flags & htons(OFPFF_CHECK_OVERLAP)) {
3588 cls_rule_from_match(&ofm->match, ntohs(ofm->priority),
3589 ofconn->flow_format, ofm->cookie, &cr);
3590 if (classifier_rule_overlaps(&p->cls, &cr)) {
3591 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_OVERLAP);
3595 rule = rule_create(p, NULL, (const union ofp_action *) ofm->actions,
3596 n_actions, ntohs(ofm->idle_timeout),
3597 ntohs(ofm->hard_timeout), ofm->cookie,
3598 ofm->flags & htons(OFPFF_SEND_FLOW_REM));
3599 cls_rule_from_match(&ofm->match, ntohs(ofm->priority),
3600 ofconn->flow_format, ofm->cookie, &rule->cr);
3603 if (ofm->buffer_id != htonl(UINT32_MAX)) {
3604 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(ofm->buffer_id),
3608 in_port = UINT16_MAX;
3611 rule_insert(p, rule, packet, in_port);
3615 static struct rule *
3616 find_flow_strict(struct ofconn *ofconn, const struct ofp_flow_mod *ofm)
3618 struct ofproto *p = ofconn->ofproto;
3619 struct cls_rule target;
3621 cls_rule_from_match(&ofm->match, ntohs(ofm->priority),
3622 ofconn->flow_format, ofm->cookie, &target);
3623 return rule_from_cls_rule(classifier_find_rule_exactly(&p->cls, &target));
3627 send_buffered_packet(struct ofconn *ofconn,
3628 struct rule *rule, const struct ofp_flow_mod *ofm)
3630 struct ofpbuf *packet;
3635 if (ofm->buffer_id == htonl(UINT32_MAX)) {
3639 error = pktbuf_retrieve(ofconn->pktbuf, ntohl(ofm->buffer_id),
3645 flow_extract(packet, 0, in_port, &flow);
3646 rule_execute(ofconn->ofproto, rule, packet, &flow);
3651 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
3653 struct modify_flows_cbdata {
3654 struct ofproto *ofproto;
3655 const struct ofp_flow_mod *ofm;
3660 static int modify_flow(struct ofproto *, const struct ofp_flow_mod *,
3661 size_t n_actions, struct rule *);
3662 static void modify_flows_cb(struct cls_rule *, void *cbdata_);
3664 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
3665 * encoded by ofp_mkerr() on failure.
3667 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3670 modify_flows_loose(struct ofconn *ofconn,
3671 const struct ofp_flow_mod *ofm, size_t n_actions)
3673 struct modify_flows_cbdata cbdata;
3674 struct cls_rule target;
3676 cbdata.ofproto = ofconn->ofproto;
3678 cbdata.n_actions = n_actions;
3679 cbdata.match = NULL;
3681 cls_rule_from_match(&ofm->match, 0, ofconn->flow_format,
3682 ofm->cookie, &target);
3684 classifier_for_each_match(&ofconn->ofproto->cls, &target, CLS_INC_ALL,
3685 modify_flows_cb, &cbdata);
3687 /* This credits the packet to whichever flow happened to happened to
3688 * match last. That's weird. Maybe we should do a lookup for the
3689 * flow that actually matches the packet? Who knows. */
3690 send_buffered_packet(ofconn, cbdata.match, ofm);
3693 return add_flow(ofconn, ofm, n_actions);
3697 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
3698 * code as encoded by ofp_mkerr() on failure.
3700 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3703 modify_flow_strict(struct ofconn *ofconn, struct ofp_flow_mod *ofm,
3706 struct rule *rule = find_flow_strict(ofconn, ofm);
3707 if (rule && !rule_is_hidden(rule)) {
3708 modify_flow(ofconn->ofproto, ofm, n_actions, rule);
3709 return send_buffered_packet(ofconn, rule, ofm);
3711 return add_flow(ofconn, ofm, n_actions);
3715 /* Callback for modify_flows_loose(). */
3717 modify_flows_cb(struct cls_rule *rule_, void *cbdata_)
3719 struct rule *rule = rule_from_cls_rule(rule_);
3720 struct modify_flows_cbdata *cbdata = cbdata_;
3722 if (!rule_is_hidden(rule)) {
3723 cbdata->match = rule;
3724 modify_flow(cbdata->ofproto, cbdata->ofm, cbdata->n_actions, rule);
3728 /* Implements core of OFPFC_MODIFY and OFPFC_MODIFY_STRICT where 'rule' has
3729 * been identified as a flow in 'p''s flow table to be modified, by changing
3730 * the rule's actions to match those in 'ofm' (which is followed by 'n_actions'
3731 * ofp_action[] structures). */
3733 modify_flow(struct ofproto *p, const struct ofp_flow_mod *ofm,
3734 size_t n_actions, struct rule *rule)
3736 size_t actions_len = n_actions * sizeof *rule->actions;
3738 rule->flow_cookie = ofm->cookie;
3740 /* If the actions are the same, do nothing. */
3741 if (n_actions == rule->n_actions
3742 && (!n_actions || !memcmp(ofm->actions, rule->actions, actions_len)))
3747 /* Replace actions. */
3748 free(rule->actions);
3749 rule->actions = n_actions ? xmemdup(ofm->actions, actions_len) : NULL;
3750 rule->n_actions = n_actions;
3752 /* Make sure that the datapath gets updated properly. */
3753 if (rule->cr.wc.wildcards) {
3754 COVERAGE_INC(ofproto_mod_wc_flow);
3755 p->need_revalidate = true;
3757 rule_update_actions(p, rule);
3763 /* OFPFC_DELETE implementation. */
3765 struct delete_flows_cbdata {
3766 struct ofproto *ofproto;
3770 static void delete_flows_cb(struct cls_rule *, void *cbdata_);
3771 static void delete_flow(struct ofproto *, struct rule *, ovs_be16 out_port);
3773 /* Implements OFPFC_DELETE. */
3775 delete_flows_loose(struct ofconn *ofconn, const struct ofp_flow_mod *ofm)
3777 struct delete_flows_cbdata cbdata;
3778 struct cls_rule target;
3780 cbdata.ofproto = ofconn->ofproto;
3781 cbdata.out_port = ofm->out_port;
3783 cls_rule_from_match(&ofm->match, 0, ofconn->flow_format,
3784 ofm->cookie, &target);
3786 classifier_for_each_match(&ofconn->ofproto->cls, &target, CLS_INC_ALL,
3787 delete_flows_cb, &cbdata);
3790 /* Implements OFPFC_DELETE_STRICT. */
3792 delete_flow_strict(struct ofconn *ofconn, struct ofp_flow_mod *ofm)
3794 struct rule *rule = find_flow_strict(ofconn, ofm);
3796 delete_flow(ofconn->ofproto, rule, ofm->out_port);
3800 /* Callback for delete_flows_loose(). */
3802 delete_flows_cb(struct cls_rule *rule_, void *cbdata_)
3804 struct rule *rule = rule_from_cls_rule(rule_);
3805 struct delete_flows_cbdata *cbdata = cbdata_;
3807 delete_flow(cbdata->ofproto, rule, cbdata->out_port);
3810 /* Implements core of OFPFC_DELETE and OFPFC_DELETE_STRICT where 'rule' has
3811 * been identified as a flow to delete from 'p''s flow table, by deleting the
3812 * flow and sending out a OFPT_FLOW_REMOVED message to any interested
3815 * Will not delete 'rule' if it is hidden. Will delete 'rule' only if
3816 * 'out_port' is htons(OFPP_NONE) or if 'rule' actually outputs to the
3817 * specified 'out_port'. */
3819 delete_flow(struct ofproto *p, struct rule *rule, ovs_be16 out_port)
3821 if (rule_is_hidden(rule)) {
3825 if (out_port != htons(OFPP_NONE) && !rule_has_out_port(rule, out_port)) {
3829 send_flow_removed(p, rule, OFPRR_DELETE);
3830 rule_remove(p, rule);
3834 handle_flow_mod(struct ofconn *ofconn, struct ofp_flow_mod *ofm)
3836 struct ofp_match orig_match;
3840 error = reject_slave_controller(ofconn, "OFPT_FLOW_MOD");
3844 error = check_ofp_message_array(&ofm->header, OFPT_FLOW_MOD, sizeof *ofm,
3845 sizeof *ofm->actions, &n_actions);
3850 /* We do not support the emergency flow cache. It will hopefully
3851 * get dropped from OpenFlow in the near future. */
3852 if (ofm->flags & htons(OFPFF_EMERG)) {
3853 /* There isn't a good fit for an error code, so just state that the
3854 * flow table is full. */
3855 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_ALL_TABLES_FULL);
3858 /* Normalize ofp->match. If normalization actually changes anything, then
3859 * log the differences. */
3860 ofm->match.pad1[0] = ofm->match.pad2[0] = 0;
3861 orig_match = ofm->match;
3862 normalize_match(&ofm->match);
3863 if (memcmp(&ofm->match, &orig_match, sizeof orig_match)) {
3864 static struct vlog_rate_limit normal_rl = VLOG_RATE_LIMIT_INIT(1, 1);
3865 if (!VLOG_DROP_INFO(&normal_rl)) {
3866 char *old = ofp_match_to_literal_string(&orig_match);
3867 char *new = ofp_match_to_literal_string(&ofm->match);
3868 VLOG_INFO("%s: normalization changed ofp_match, details:",
3869 rconn_get_name(ofconn->rconn));
3870 VLOG_INFO(" pre: %s", old);
3871 VLOG_INFO("post: %s", new);
3877 if (!ofm->match.wildcards) {
3878 ofm->priority = htons(UINT16_MAX);
3881 error = validate_actions((const union ofp_action *) ofm->actions,
3882 n_actions, ofconn->ofproto->max_ports);
3887 switch (ntohs(ofm->command)) {
3889 return add_flow(ofconn, ofm, n_actions);
3892 return modify_flows_loose(ofconn, ofm, n_actions);
3894 case OFPFC_MODIFY_STRICT:
3895 return modify_flow_strict(ofconn, ofm, n_actions);
3898 delete_flows_loose(ofconn, ofm);
3901 case OFPFC_DELETE_STRICT:
3902 delete_flow_strict(ofconn, ofm);
3906 return ofp_mkerr(OFPET_FLOW_MOD_FAILED, OFPFMFC_BAD_COMMAND);
3911 handle_tun_id_from_cookie(struct ofconn *ofconn, struct nxt_tun_id_cookie *msg)
3915 error = check_ofp_message(&msg->header, OFPT_VENDOR, sizeof *msg);
3920 ofconn->flow_format = msg->set ? NXFF_TUN_ID_FROM_COOKIE : NXFF_OPENFLOW10;
3925 handle_role_request(struct ofconn *ofconn, struct nicira_header *msg)
3927 struct nx_role_request *nrr;
3928 struct nx_role_request *reply;
3932 if (ntohs(msg->header.length) != sizeof *nrr) {
3933 VLOG_WARN_RL(&rl, "received role request of length %u (expected %zu)",
3934 ntohs(msg->header.length), sizeof *nrr);
3935 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3937 nrr = (struct nx_role_request *) msg;
3939 if (ofconn->type != OFCONN_PRIMARY) {
3940 VLOG_WARN_RL(&rl, "ignoring role request on non-controller "
3942 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM);
3945 role = ntohl(nrr->role);
3946 if (role != NX_ROLE_OTHER && role != NX_ROLE_MASTER
3947 && role != NX_ROLE_SLAVE) {
3948 VLOG_WARN_RL(&rl, "received request for unknown role %"PRIu32, role);
3950 /* There's no good error code for this. */
3951 return ofp_mkerr(OFPET_BAD_REQUEST, -1);
3954 if (role == NX_ROLE_MASTER) {
3955 struct ofconn *other;
3957 HMAP_FOR_EACH (other, hmap_node, &ofconn->ofproto->controllers) {
3958 if (other->role == NX_ROLE_MASTER) {
3959 other->role = NX_ROLE_SLAVE;
3963 ofconn->role = role;
3965 reply = make_nxmsg_xid(sizeof *reply, NXT_ROLE_REPLY, msg->header.xid,
3967 reply->role = htonl(role);
3968 queue_tx(buf, ofconn, ofconn->reply_counter);
3974 handle_vendor(struct ofconn *ofconn, void *msg)
3976 struct ofproto *p = ofconn->ofproto;
3977 struct ofp_vendor_header *ovh = msg;
3978 struct nicira_header *nh;
3980 if (ntohs(ovh->header.length) < sizeof(struct ofp_vendor_header)) {
3981 VLOG_WARN_RL(&rl, "received vendor message of length %u "
3982 "(expected at least %zu)",
3983 ntohs(ovh->header.length), sizeof(struct ofp_vendor_header));
3984 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3986 if (ovh->vendor != htonl(NX_VENDOR_ID)) {
3987 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_VENDOR);
3989 if (ntohs(ovh->header.length) < sizeof(struct nicira_header)) {
3990 VLOG_WARN_RL(&rl, "received Nicira vendor message of length %u "
3991 "(expected at least %zu)",
3992 ntohs(ovh->header.length), sizeof(struct nicira_header));
3993 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
3997 switch (ntohl(nh->subtype)) {
3998 case NXT_STATUS_REQUEST:
3999 return switch_status_handle_request(p->switch_status, ofconn->rconn,
4002 case NXT_TUN_ID_FROM_COOKIE:
4003 return handle_tun_id_from_cookie(ofconn, msg);
4005 case NXT_ROLE_REQUEST:
4006 return handle_role_request(ofconn, msg);
4009 return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_SUBTYPE);
4013 handle_barrier_request(struct ofconn *ofconn, struct ofp_header *oh)
4015 struct ofp_header *ob;
4018 /* Currently, everything executes synchronously, so we can just
4019 * immediately send the barrier reply. */
4020 ob = make_openflow_xid(sizeof *ob, OFPT_BARRIER_REPLY, oh->xid, &buf);
4021 queue_tx(buf, ofconn, ofconn->reply_counter);
4026 handle_openflow(struct ofconn *ofconn, struct ofpbuf *ofp_msg)
4028 struct ofp_header *oh = ofp_msg->data;
4031 COVERAGE_INC(ofproto_recv_openflow);
4033 case OFPT_ECHO_REQUEST:
4034 error = handle_echo_request(ofconn, oh);
4037 case OFPT_ECHO_REPLY:
4041 case OFPT_FEATURES_REQUEST:
4042 error = handle_features_request(ofconn, oh);
4045 case OFPT_GET_CONFIG_REQUEST:
4046 error = handle_get_config_request(ofconn, oh);
4049 case OFPT_SET_CONFIG:
4050 error = handle_set_config(ofconn, ofp_msg->data);
4053 case OFPT_PACKET_OUT:
4054 error = handle_packet_out(ofconn, ofp_msg->data);
4058 error = handle_port_mod(ofconn, oh);
4062 error = handle_flow_mod(ofconn, ofp_msg->data);
4065 case OFPT_STATS_REQUEST:
4066 error = handle_stats_request(ofconn, oh);
4070 error = handle_vendor(ofconn, ofp_msg->data);
4073 case OFPT_BARRIER_REQUEST:
4074 error = handle_barrier_request(ofconn, oh);
4078 if (VLOG_IS_WARN_ENABLED()) {
4079 char *s = ofp_to_string(oh, ntohs(oh->length), 2);
4080 VLOG_DBG_RL(&rl, "OpenFlow message ignored: %s", s);
4083 error = ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_TYPE);
4088 send_error_oh(ofconn, ofp_msg->data, error);
4093 handle_odp_miss_msg(struct ofproto *p, struct ofpbuf *packet)
4095 struct odp_msg *msg = packet->data;
4097 struct ofpbuf payload;
4100 payload.data = msg + 1;
4101 payload.size = msg->length - sizeof *msg;
4102 flow_extract(&payload, msg->arg, msg->port, &flow);
4104 /* Check with in-band control to see if this packet should be sent
4105 * to the local port regardless of the flow table. */
4106 if (in_band_msg_in_hook(p->in_band, &flow, &payload)) {
4107 union odp_action action;
4109 memset(&action, 0, sizeof(action));
4110 action.output.type = ODPAT_OUTPUT;
4111 action.output.port = ODPP_LOCAL;
4112 dpif_execute(p->dpif, &action, 1, &payload);
4115 rule = lookup_valid_rule(p, &flow);
4117 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
4118 struct ofport *port = get_port(p, msg->port);
4120 if (port->opp.config & OFPPC_NO_PACKET_IN) {
4121 COVERAGE_INC(ofproto_no_packet_in);
4122 /* XXX install 'drop' flow entry */
4123 ofpbuf_delete(packet);
4127 VLOG_WARN_RL(&rl, "packet-in on unknown port %"PRIu16, msg->port);
4130 COVERAGE_INC(ofproto_packet_in);
4131 send_packet_in(p, packet);
4135 if (rule->cr.wc.wildcards) {
4136 rule = rule_create_subrule(p, rule, &flow);
4137 rule_make_actions(p, rule, packet);
4139 if (!rule->may_install) {
4140 /* The rule is not installable, that is, we need to process every
4141 * packet, so process the current packet and set its actions into
4143 rule_make_actions(p, rule, packet);
4145 /* XXX revalidate rule if it needs it */
4149 if (rule->super && rule->super->cr.priority == FAIL_OPEN_PRIORITY) {
4151 * Extra-special case for fail-open mode.
4153 * We are in fail-open mode and the packet matched the fail-open rule,
4154 * but we are connected to a controller too. We should send the packet
4155 * up to the controller in the hope that it will try to set up a flow
4156 * and thereby allow us to exit fail-open.
4158 * See the top-level comment in fail-open.c for more information.
4160 send_packet_in(p, ofpbuf_clone_with_headroom(packet,
4161 DPIF_RECV_MSG_PADDING));
4164 ofpbuf_pull(packet, sizeof *msg);
4165 rule_execute(p, rule, packet, &flow);
4166 rule_reinstall(p, rule);
4170 handle_odp_msg(struct ofproto *p, struct ofpbuf *packet)
4172 struct odp_msg *msg = packet->data;
4174 switch (msg->type) {
4175 case _ODPL_ACTION_NR:
4176 COVERAGE_INC(ofproto_ctlr_action);
4177 send_packet_in(p, packet);
4180 case _ODPL_SFLOW_NR:
4182 ofproto_sflow_received(p->sflow, msg);
4184 ofpbuf_delete(packet);
4188 handle_odp_miss_msg(p, packet);
4192 VLOG_WARN_RL(&rl, "received ODP message of unexpected type %"PRIu32,
4198 /* Flow expiration. */
4200 struct expire_cbdata {
4201 struct ofproto *ofproto;
4205 static int ofproto_dp_max_idle(const struct ofproto *);
4206 static void ofproto_update_used(struct ofproto *);
4207 static void rule_expire(struct cls_rule *, void *cbdata);
4209 /* This function is called periodically by ofproto_run(). Its job is to
4210 * collect updates for the flows that have been installed into the datapath,
4211 * most importantly when they last were used, and then use that information to
4212 * expire flows that have not been used recently.
4214 * Returns the number of milliseconds after which it should be called again. */
4216 ofproto_expire(struct ofproto *ofproto)
4218 struct expire_cbdata cbdata;
4220 /* Update 'used' for each flow in the datapath. */
4221 ofproto_update_used(ofproto);
4223 /* Expire idle flows.
4225 * A wildcarded flow is idle only when all of its subrules have expired due
4226 * to becoming idle, so iterate through the exact-match flows first. */
4227 cbdata.ofproto = ofproto;
4228 cbdata.dp_max_idle = ofproto_dp_max_idle(ofproto);
4229 classifier_for_each(&ofproto->cls, CLS_INC_EXACT, rule_expire, &cbdata);
4230 classifier_for_each(&ofproto->cls, CLS_INC_WILD, rule_expire, &cbdata);
4232 /* Let the hook know that we're at a stable point: all outstanding data
4233 * in existing flows has been accounted to the account_cb. Thus, the
4234 * hook can now reasonably do operations that depend on having accurate
4235 * flow volume accounting (currently, that's just bond rebalancing). */
4236 if (ofproto->ofhooks->account_checkpoint_cb) {
4237 ofproto->ofhooks->account_checkpoint_cb(ofproto->aux);
4240 return MIN(cbdata.dp_max_idle, 1000);
4243 /* Update 'used' member of each flow currently installed into the datapath. */
4245 ofproto_update_used(struct ofproto *p)
4247 struct odp_flow *flows;
4252 error = dpif_flow_list_all(p->dpif, &flows, &n_flows);
4257 for (i = 0; i < n_flows; i++) {
4258 struct odp_flow *f = &flows[i];
4259 struct cls_rule target;
4263 odp_flow_key_to_flow(&f->key, &flow);
4264 cls_rule_from_flow(&flow, 0, UINT16_MAX, &target);
4266 rule = rule_from_cls_rule(classifier_find_rule_exactly(&p->cls,
4269 if (rule && rule->installed) {
4270 update_time(p, rule, &f->stats);
4271 rule_account(p, rule, f->stats.n_bytes);
4273 /* There's a flow in the datapath that we know nothing about.
4275 COVERAGE_INC(ofproto_unexpected_rule);
4276 dpif_flow_del(p->dpif, f);
4283 /* Calculates and returns the number of milliseconds of idle time after which
4284 * flows should expire from the datapath and we should fold their statistics
4285 * into their parent rules in userspace. */
4287 ofproto_dp_max_idle(const struct ofproto *ofproto)
4290 * Idle time histogram.
4292 * Most of the time a switch has a relatively small number of flows. When
4293 * this is the case we might as well keep statistics for all of them in
4294 * userspace and to cache them in the kernel datapath for performance as
4297 * As the number of flows increases, the memory required to maintain
4298 * statistics about them in userspace and in the kernel becomes
4299 * significant. However, with a large number of flows it is likely that
4300 * only a few of them are "heavy hitters" that consume a large amount of
4301 * bandwidth. At this point, only heavy hitters are worth caching in the
4302 * kernel and maintaining in userspaces; other flows we can discard.
4304 * The technique used to compute the idle time is to build a histogram with
4305 * N_BUCKETS bucket whose width is BUCKET_WIDTH msecs each. Each flow that
4306 * is installed in the kernel gets dropped in the appropriate bucket.
4307 * After the histogram has been built, we compute the cutoff so that only
4308 * the most-recently-used 1% of flows (but at least 1000 flows) are kept
4309 * cached. At least the most-recently-used bucket of flows is kept, so
4310 * actually an arbitrary number of flows can be kept in any given
4311 * expiration run (though the next run will delete most of those unless
4312 * they receive additional data).
4314 * This requires a second pass through the exact-match flows, in addition
4315 * to the pass made by ofproto_update_used(), because the former function
4316 * never looks at uninstallable flows.
4318 enum { BUCKET_WIDTH = ROUND_UP(100, TIME_UPDATE_INTERVAL) };
4319 enum { N_BUCKETS = 5000 / BUCKET_WIDTH };
4320 int buckets[N_BUCKETS] = { 0 };
4326 total = classifier_count_exact(&ofproto->cls);
4327 if (total <= 1000) {
4328 return N_BUCKETS * BUCKET_WIDTH;
4331 /* Build histogram. */
4333 CLASSIFIER_FOR_EACH_EXACT_RULE (rule, cr, &ofproto->cls) {
4334 long long int idle = now - rule->used;
4335 int bucket = (idle <= 0 ? 0
4336 : idle >= BUCKET_WIDTH * N_BUCKETS ? N_BUCKETS - 1
4337 : (unsigned int) idle / BUCKET_WIDTH);
4341 /* Find the first bucket whose flows should be expired. */
4342 for (bucket = 0; bucket < N_BUCKETS; bucket++) {
4343 if (buckets[bucket]) {
4346 subtotal += buckets[bucket++];
4347 } while (bucket < N_BUCKETS && subtotal < MAX(1000, total / 100));
4352 if (VLOG_IS_DBG_ENABLED()) {
4356 ds_put_cstr(&s, "keep");
4357 for (i = 0; i < N_BUCKETS; i++) {
4359 ds_put_cstr(&s, ", drop");
4362 ds_put_format(&s, " %d:%d", i * BUCKET_WIDTH, buckets[i]);
4365 VLOG_INFO("%s: %s (msec:count)",
4366 dpif_name(ofproto->dpif), ds_cstr(&s));
4370 return bucket * BUCKET_WIDTH;
4374 rule_active_timeout(struct ofproto *ofproto, struct rule *rule)
4376 if (ofproto->netflow && !is_controller_rule(rule) &&
4377 netflow_active_timeout_expired(ofproto->netflow, &rule->nf_flow)) {
4378 struct ofexpired expired;
4379 struct odp_flow odp_flow;
4381 /* Get updated flow stats.
4383 * XXX We could avoid this call entirely if (1) ofproto_update_used()
4384 * updated TCP flags and (2) the dpif_flow_list_all() in
4385 * ofproto_update_used() zeroed TCP flags. */
4386 memset(&odp_flow, 0, sizeof odp_flow);
4387 if (rule->installed) {
4388 odp_flow_key_from_flow(&odp_flow.key, &rule->cr.flow);
4389 odp_flow.flags = ODPFF_ZERO_TCP_FLAGS;
4390 dpif_flow_get(ofproto->dpif, &odp_flow);
4392 if (odp_flow.stats.n_packets) {
4393 update_time(ofproto, rule, &odp_flow.stats);
4394 netflow_flow_update_flags(&rule->nf_flow,
4395 odp_flow.stats.tcp_flags);
4399 expired.flow = rule->cr.flow;
4400 expired.packet_count = rule->packet_count +
4401 odp_flow.stats.n_packets;
4402 expired.byte_count = rule->byte_count + odp_flow.stats.n_bytes;
4403 expired.used = rule->used;
4405 netflow_expire(ofproto->netflow, &rule->nf_flow, &expired);
4409 /* If 'cls_rule' is an OpenFlow rule, that has expired according to OpenFlow
4410 * rules, then delete it entirely.
4412 * If 'cls_rule' is a subrule, that has not been used recently, remove it from
4413 * the datapath and fold its statistics back into its super-rule.
4415 * (This is a callback function for classifier_for_each().) */
4417 rule_expire(struct cls_rule *cls_rule, void *cbdata_)
4419 struct expire_cbdata *cbdata = cbdata_;
4420 struct ofproto *ofproto = cbdata->ofproto;
4421 struct rule *rule = rule_from_cls_rule(cls_rule);
4422 long long int hard_expire, idle_expire, expire, now;
4424 /* Calculate OpenFlow expiration times for 'rule'. */
4425 hard_expire = (rule->hard_timeout
4426 ? rule->created + rule->hard_timeout * 1000
4428 idle_expire = (rule->idle_timeout
4429 && (rule->super || list_is_empty(&rule->list))
4430 ? rule->used + rule->idle_timeout * 1000
4432 expire = MIN(hard_expire, idle_expire);
4436 /* 'rule' has not expired according to OpenFlow rules. */
4437 if (!rule->cr.wc.wildcards) {
4438 if (now >= rule->used + cbdata->dp_max_idle) {
4439 /* This rule is idle, so drop it to free up resources. */
4441 /* It's not part of the OpenFlow flow table, so we can
4442 * delete it entirely and fold its statistics into its
4444 rule_remove(ofproto, rule);
4446 /* It is part of the OpenFlow flow table, so we have to
4447 * keep the rule but we can at least uninstall it from the
4449 rule_uninstall(ofproto, rule);
4452 /* Send NetFlow active timeout if appropriate. */
4453 rule_active_timeout(cbdata->ofproto, rule);
4457 /* 'rule' has expired according to OpenFlow rules. */
4458 COVERAGE_INC(ofproto_expired);
4460 /* Update stats. (This is a no-op if the rule expired due to an idle
4461 * timeout, because that only happens when the rule has no subrules
4463 if (rule->cr.wc.wildcards) {
4464 struct rule *subrule, *next;
4465 LIST_FOR_EACH_SAFE (subrule, next, list, &rule->list) {
4466 rule_remove(cbdata->ofproto, subrule);
4469 rule_uninstall(cbdata->ofproto, rule);
4472 /* Get rid of the rule. */
4473 if (!rule_is_hidden(rule)) {
4474 send_flow_removed(cbdata->ofproto, rule,
4476 ? OFPRR_HARD_TIMEOUT : OFPRR_IDLE_TIMEOUT));
4478 rule_remove(cbdata->ofproto, rule);
4483 revalidate_cb(struct cls_rule *sub_, void *cbdata_)
4485 struct rule *sub = rule_from_cls_rule(sub_);
4486 struct revalidate_cbdata *cbdata = cbdata_;
4488 if (cbdata->revalidate_all
4489 || (cbdata->revalidate_subrules && sub->super)
4490 || (tag_set_intersects(&cbdata->revalidate_set, sub->tags))) {
4491 revalidate_rule(cbdata->ofproto, sub);
4496 revalidate_rule(struct ofproto *p, struct rule *rule)
4498 const struct flow *flow = &rule->cr.flow;
4500 COVERAGE_INC(ofproto_revalidate_rule);
4503 super = rule_from_cls_rule(classifier_lookup(&p->cls, flow,
4506 rule_remove(p, rule);
4508 } else if (super != rule->super) {
4509 COVERAGE_INC(ofproto_revalidate_moved);
4510 list_remove(&rule->list);
4511 list_push_back(&super->list, &rule->list);
4512 rule->super = super;
4513 rule->hard_timeout = super->hard_timeout;
4514 rule->idle_timeout = super->idle_timeout;
4515 rule->created = super->created;
4520 rule_update_actions(p, rule);
4524 static struct ofpbuf *
4525 compose_flow_removed(struct ofconn *ofconn, const struct rule *rule,
4528 struct ofp_flow_removed *ofr;
4531 ofr = make_openflow(sizeof *ofr, OFPT_FLOW_REMOVED, &buf);
4532 flow_to_match(&rule->cr.flow, rule->cr.wc.wildcards, ofconn->flow_format,
4534 ofr->cookie = rule->flow_cookie;
4535 ofr->priority = htons(rule->cr.priority);
4536 ofr->reason = reason;
4537 calc_flow_duration(rule->created, &ofr->duration_sec, &ofr->duration_nsec);
4538 ofr->idle_timeout = htons(rule->idle_timeout);
4539 ofr->packet_count = htonll(rule->packet_count);
4540 ofr->byte_count = htonll(rule->byte_count);
4546 send_flow_removed(struct ofproto *p, struct rule *rule, uint8_t reason)
4548 struct ofconn *ofconn;
4550 if (!rule->send_flow_removed) {
4554 LIST_FOR_EACH (ofconn, node, &p->all_conns) {
4557 if (!rconn_is_connected(ofconn->rconn)
4558 || !ofconn_receives_async_msgs(ofconn)) {
4562 msg = compose_flow_removed(ofconn, rule, reason);
4564 /* Account flow expirations under ofconn->reply_counter, the counter
4565 * for replies to OpenFlow requests. That works because preventing
4566 * OpenFlow requests from being processed also prevents new flows from
4567 * being added (and expiring). (It also prevents processing OpenFlow
4568 * requests that would not add new flows, so it is imperfect.) */
4569 queue_tx(msg, ofconn, ofconn->reply_counter);
4573 /* pinsched callback for sending 'packet' on 'ofconn'. */
4575 do_send_packet_in(struct ofpbuf *packet, void *ofconn_)
4577 struct ofconn *ofconn = ofconn_;
4579 rconn_send_with_limit(ofconn->rconn, packet,
4580 ofconn->packet_in_counter, 100);
4583 /* Takes 'packet', which has been converted with do_convert_to_packet_in(), and
4584 * finalizes its content for sending on 'ofconn', and passes it to 'ofconn''s
4585 * packet scheduler for sending.
4587 * 'max_len' specifies the maximum number of bytes of the packet to send on
4588 * 'ofconn' (INT_MAX specifies no limit).
4590 * If 'clone' is true, the caller retains ownership of 'packet'. Otherwise,
4591 * ownership is transferred to this function. */
4593 schedule_packet_in(struct ofconn *ofconn, struct ofpbuf *packet, int max_len,
4596 struct ofproto *ofproto = ofconn->ofproto;
4597 struct ofp_packet_in *opi = packet->data;
4598 uint16_t in_port = ofp_port_to_odp_port(ntohs(opi->in_port));
4599 int send_len, trim_size;
4603 if (opi->reason == OFPR_ACTION) {
4604 buffer_id = UINT32_MAX;
4605 } else if (ofproto->fail_open && fail_open_is_active(ofproto->fail_open)) {
4606 buffer_id = pktbuf_get_null();
4607 } else if (!ofconn->pktbuf) {
4608 buffer_id = UINT32_MAX;
4610 struct ofpbuf payload;
4611 payload.data = opi->data;
4612 payload.size = packet->size - offsetof(struct ofp_packet_in, data);
4613 buffer_id = pktbuf_save(ofconn->pktbuf, &payload, in_port);
4616 /* Figure out how much of the packet to send. */
4617 send_len = ntohs(opi->total_len);
4618 if (buffer_id != UINT32_MAX) {
4619 send_len = MIN(send_len, ofconn->miss_send_len);
4621 send_len = MIN(send_len, max_len);
4623 /* Adjust packet length and clone if necessary. */
4624 trim_size = offsetof(struct ofp_packet_in, data) + send_len;
4626 packet = ofpbuf_clone_data(packet->data, trim_size);
4629 packet->size = trim_size;
4632 /* Update packet headers. */
4633 opi->buffer_id = htonl(buffer_id);
4634 update_openflow_length(packet);
4636 /* Hand over to packet scheduler. It might immediately call into
4637 * do_send_packet_in() or it might buffer it for a while (until a later
4638 * call to pinsched_run()). */
4639 pinsched_send(ofconn->schedulers[opi->reason], in_port,
4640 packet, do_send_packet_in, ofconn);
4643 /* Replace struct odp_msg header in 'packet' by equivalent struct
4644 * ofp_packet_in. The odp_msg must have sufficient headroom to do so (e.g. as
4645 * returned by dpif_recv()).
4647 * The conversion is not complete: the caller still needs to trim any unneeded
4648 * payload off the end of the buffer, set the length in the OpenFlow header,
4649 * and set buffer_id. Those require us to know the controller settings and so
4650 * must be done on a per-controller basis.
4652 * Returns the maximum number of bytes of the packet that should be sent to
4653 * the controller (INT_MAX if no limit). */
4655 do_convert_to_packet_in(struct ofpbuf *packet)
4657 struct odp_msg *msg = packet->data;
4658 struct ofp_packet_in *opi;
4664 /* Extract relevant header fields */
4665 if (msg->type == _ODPL_ACTION_NR) {
4666 reason = OFPR_ACTION;
4669 reason = OFPR_NO_MATCH;
4672 total_len = msg->length - sizeof *msg;
4673 in_port = odp_port_to_ofp_port(msg->port);
4675 /* Repurpose packet buffer by overwriting header. */
4676 ofpbuf_pull(packet, sizeof(struct odp_msg));
4677 opi = ofpbuf_push_zeros(packet, offsetof(struct ofp_packet_in, data));
4678 opi->header.version = OFP_VERSION;
4679 opi->header.type = OFPT_PACKET_IN;
4680 opi->total_len = htons(total_len);
4681 opi->in_port = htons(in_port);
4682 opi->reason = reason;
4687 /* Given 'packet' containing an odp_msg of type _ODPL_ACTION_NR or
4688 * _ODPL_MISS_NR, sends an OFPT_PACKET_IN message to each OpenFlow controller
4689 * as necessary according to their individual configurations.
4691 * 'packet' must have sufficient headroom to convert it into a struct
4692 * ofp_packet_in (e.g. as returned by dpif_recv()).
4694 * Takes ownership of 'packet'. */
4696 send_packet_in(struct ofproto *ofproto, struct ofpbuf *packet)
4698 struct ofconn *ofconn, *prev;
4701 max_len = do_convert_to_packet_in(packet);
4704 LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
4705 if (ofconn_receives_async_msgs(ofconn)) {
4707 schedule_packet_in(prev, packet, max_len, true);
4713 schedule_packet_in(prev, packet, max_len, false);
4715 ofpbuf_delete(packet);
4720 pick_datapath_id(const struct ofproto *ofproto)
4722 const struct ofport *port;
4724 port = get_port(ofproto, ODPP_LOCAL);
4726 uint8_t ea[ETH_ADDR_LEN];
4729 error = netdev_get_etheraddr(port->netdev, ea);
4731 return eth_addr_to_uint64(ea);
4733 VLOG_WARN("could not get MAC address for %s (%s)",
4734 netdev_get_name(port->netdev), strerror(error));
4736 return ofproto->fallback_dpid;
4740 pick_fallback_dpid(void)
4742 uint8_t ea[ETH_ADDR_LEN];
4743 eth_addr_nicira_random(ea);
4744 return eth_addr_to_uint64(ea);
4748 default_normal_ofhook_cb(const struct flow *flow, const struct ofpbuf *packet,
4749 struct odp_actions *actions, tag_type *tags,
4750 uint16_t *nf_output_iface, void *ofproto_)
4752 struct ofproto *ofproto = ofproto_;
4755 /* Drop frames for reserved multicast addresses. */
4756 if (eth_addr_is_reserved(flow->dl_dst)) {
4760 /* Learn source MAC (but don't try to learn from revalidation). */
4761 if (packet != NULL) {
4762 tag_type rev_tag = mac_learning_learn(ofproto->ml, flow->dl_src,
4764 GRAT_ARP_LOCK_NONE);
4766 /* The log messages here could actually be useful in debugging,
4767 * so keep the rate limit relatively high. */
4768 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
4769 VLOG_DBG_RL(&rl, "learned that "ETH_ADDR_FMT" is on port %"PRIu16,
4770 ETH_ADDR_ARGS(flow->dl_src), flow->in_port);
4771 ofproto_revalidate(ofproto, rev_tag);
4775 /* Determine output port. */
4776 out_port = mac_learning_lookup_tag(ofproto->ml, flow->dl_dst, 0, tags,
4779 flood_packets(ofproto, flow->in_port, OFPPC_NO_FLOOD,
4780 nf_output_iface, actions);
4781 } else if (out_port != flow->in_port) {
4782 odp_actions_add(actions, ODPAT_OUTPUT)->output.port = out_port;
4783 *nf_output_iface = out_port;
4791 static const struct ofhooks default_ofhooks = {
4792 default_normal_ofhook_cb,