2 * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
3 * Copyright (c) 2009 InMon Corp.
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.
19 #include "ofproto-dpif-sflow.h"
21 #include <sys/resource.h>
22 #include <sys/socket.h>
25 #include "collectors.h"
35 #include "poll-loop.h"
36 #include "ovs-router.h"
37 #include "route-table.h"
38 #include "sflow_api.h"
39 #include "socket-util.h"
41 #include "openvswitch/vlog.h"
42 #include "lib/odp-util.h"
43 #include "ofproto-provider.h"
46 VLOG_DEFINE_THIS_MODULE(sflow);
48 static struct ovs_mutex mutex;
50 /* This global var is used to determine which sFlow
51 sub-agent should send the datapath counters. */
52 #define SFLOW_GC_SUBID_UNCLAIMED (uint32_t)-1
53 static uint32_t sflow_global_counters_subid = SFLOW_GC_SUBID_UNCLAIMED;
55 struct dpif_sflow_port {
56 struct hmap_node hmap_node; /* In struct dpif_sflow's "ports" hmap. */
57 SFLDataSource_instance dsi; /* sFlow library's notion of port number. */
58 struct ofport *ofport; /* To retrive port stats. */
63 struct collectors *collectors;
64 SFLAgent *sflow_agent;
65 struct ofproto_sflow_options *options;
67 size_t n_flood, n_all;
68 struct hmap ports; /* Contains "struct dpif_sflow_port"s. */
70 struct ovs_refcount ref_cnt;
73 static void dpif_sflow_del_port__(struct dpif_sflow *,
74 struct dpif_sflow_port *);
76 #define RECEIVER_INDEX 1
78 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
81 nullable_string_is_equal(const char *a, const char *b)
83 return a ? b && !strcmp(a, b) : !b;
87 ofproto_sflow_options_equal(const struct ofproto_sflow_options *a,
88 const struct ofproto_sflow_options *b)
90 return (sset_equals(&a->targets, &b->targets)
91 && a->sampling_rate == b->sampling_rate
92 && a->polling_interval == b->polling_interval
93 && a->header_len == b->header_len
94 && a->sub_id == b->sub_id
95 && nullable_string_is_equal(a->agent_device, b->agent_device)
96 && nullable_string_is_equal(a->control_ip, b->control_ip));
99 static struct ofproto_sflow_options *
100 ofproto_sflow_options_clone(const struct ofproto_sflow_options *old)
102 struct ofproto_sflow_options *new = xmemdup(old, sizeof *old);
103 sset_clone(&new->targets, &old->targets);
104 new->agent_device = old->agent_device ? xstrdup(old->agent_device) : NULL;
105 new->control_ip = old->control_ip ? xstrdup(old->control_ip) : NULL;
110 ofproto_sflow_options_destroy(struct ofproto_sflow_options *options)
113 sset_destroy(&options->targets);
114 free(options->agent_device);
115 free(options->control_ip);
120 /* sFlow library callback to allocate memory. */
122 sflow_agent_alloc_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED,
125 return calloc(1, bytes);
128 /* sFlow library callback to free memory. */
130 sflow_agent_free_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED,
137 /* sFlow library callback to report error. */
139 sflow_agent_error_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED,
142 VLOG_WARN("sFlow agent error: %s", msg);
145 /* sFlow library callback to send datagram. */
147 sflow_agent_send_packet_cb(void *ds_, SFLAgent *agent OVS_UNUSED,
148 SFLReceiver *receiver OVS_UNUSED, u_char *pkt,
151 struct dpif_sflow *ds = ds_;
152 collectors_send(ds->collectors, pkt, pktLen);
155 static struct dpif_sflow_port *
156 dpif_sflow_find_port(const struct dpif_sflow *ds, odp_port_t odp_port)
159 struct dpif_sflow_port *dsp;
161 HMAP_FOR_EACH_IN_BUCKET (dsp, hmap_node, hash_odp_port(odp_port),
163 if (dsp->odp_port == odp_port) {
170 /* Call to get the datapath stats. Modeled after the dpctl utility.
172 * It might be more efficient for this module to be given a handle it can use
173 * to get these stats more efficiently, but this is only going to be called
174 * once every 20-30 seconds. Return number of datapaths found (normally expect
177 sflow_get_dp_stats(struct dpif_sflow *ds OVS_UNUSED,
178 struct dpif_dp_stats *dp_totals)
184 memset(dp_totals, 0, sizeof *dp_totals);
186 dp_enumerate_types(&types);
187 SSET_FOR_EACH (type, &types) {
191 if (dp_enumerate_names(type, &names) == 0) {
192 SSET_FOR_EACH (name, &names) {
194 if (dpif_open(name, type, &dpif) == 0) {
195 struct dpif_dp_stats dp_stats;
196 if (dpif_get_dp_stats(dpif, &dp_stats) == 0) {
198 dp_totals->n_hit += dp_stats.n_hit;
199 dp_totals->n_missed += dp_stats.n_missed;
200 dp_totals->n_lost += dp_stats.n_lost;
201 dp_totals->n_flows += dp_stats.n_flows;
202 dp_totals->n_mask_hit += dp_stats.n_mask_hit;
203 dp_totals->n_masks += dp_stats.n_masks;
208 sset_destroy(&names);
211 sset_destroy(&types);
215 /* If there are multiple bridges defined then we need some
216 minimal artibration to decide which one should send the
217 global counters. This function allows each sub-agent to
218 ask if he should do it or not. */
220 sflow_global_counters_subid_test(uint32_t subid)
223 if (sflow_global_counters_subid == SFLOW_GC_SUBID_UNCLAIMED) {
224 /* The role is up for grabs. */
225 sflow_global_counters_subid = subid;
227 return (sflow_global_counters_subid == subid);
231 sflow_global_counters_subid_clear(uint32_t subid)
234 if (sflow_global_counters_subid == subid) {
235 /* The sub-agent that was sending global counters
236 is going away, so reset to allow another
238 sflow_global_counters_subid = SFLOW_GC_SUBID_UNCLAIMED;
243 sflow_agent_get_global_counters(void *ds_, SFLPoller *poller,
244 SFL_COUNTERS_SAMPLE_TYPE *cs)
247 struct dpif_sflow *ds = ds_;
248 SFLCounters_sample_element dp_elem, res_elem;
249 struct dpif_dp_stats dp_totals;
252 if (!sflow_global_counters_subid_test(poller->agent->subId)) {
253 /* Another sub-agent is currently responsible for this. */
258 if (sflow_get_dp_stats(ds, &dp_totals)) {
259 dp_elem.tag = SFLCOUNTERS_OVSDP;
260 dp_elem.counterBlock.ovsdp.n_hit = dp_totals.n_hit;
261 dp_elem.counterBlock.ovsdp.n_missed = dp_totals.n_missed;
262 dp_elem.counterBlock.ovsdp.n_lost = dp_totals.n_lost;
263 dp_elem.counterBlock.ovsdp.n_mask_hit = dp_totals.n_mask_hit;
264 dp_elem.counterBlock.ovsdp.n_flows = dp_totals.n_flows;
265 dp_elem.counterBlock.ovsdp.n_masks = dp_totals.n_masks;
266 SFLADD_ELEMENT(cs, &dp_elem);
270 getrusage(RUSAGE_SELF, &usage);
271 res_elem.tag = SFLCOUNTERS_APP_RESOURCES;
272 res_elem.counterBlock.appResources.user_time
273 = timeval_to_msec(&usage.ru_utime);
274 res_elem.counterBlock.appResources.system_time
275 = timeval_to_msec(&usage.ru_stime);
276 res_elem.counterBlock.appResources.mem_used = (usage.ru_maxrss * 1024);
277 SFL_UNDEF_GAUGE(res_elem.counterBlock.appResources.mem_max);
278 SFL_UNDEF_GAUGE(res_elem.counterBlock.appResources.fd_open);
279 SFL_UNDEF_GAUGE(res_elem.counterBlock.appResources.fd_max);
280 SFL_UNDEF_GAUGE(res_elem.counterBlock.appResources.conn_open);
281 SFL_UNDEF_GAUGE(res_elem.counterBlock.appResources.conn_max);
283 SFLADD_ELEMENT(cs, &res_elem);
284 sfl_poller_writeCountersSample(poller, cs);
288 sflow_agent_get_counters(void *ds_, SFLPoller *poller,
289 SFL_COUNTERS_SAMPLE_TYPE *cs)
292 struct dpif_sflow *ds = ds_;
293 SFLCounters_sample_element elem, lacp_elem, of_elem, name_elem;
294 enum netdev_features current;
295 struct dpif_sflow_port *dsp;
296 SFLIf_counters *counters;
297 struct netdev_stats stats;
298 enum netdev_flags flags;
299 struct lacp_slave_stats lacp_stats;
302 dsp = dpif_sflow_find_port(ds, u32_to_odp(poller->bridgePort));
307 elem.tag = SFLCOUNTERS_GENERIC;
308 counters = &elem.counterBlock.generic;
309 counters->ifIndex = SFL_DS_INDEX(poller->dsi);
310 counters->ifType = 6;
311 if (!netdev_get_features(dsp->ofport->netdev, ¤t, NULL, NULL, NULL)) {
312 /* The values of ifDirection come from MAU MIB (RFC 2668): 0 = unknown,
313 1 = full-duplex, 2 = half-duplex, 3 = in, 4=out */
314 counters->ifSpeed = netdev_features_to_bps(current, 0);
315 counters->ifDirection = (netdev_features_is_full_duplex(current)
318 counters->ifSpeed = 100000000;
319 counters->ifDirection = 0;
321 if (!netdev_get_flags(dsp->ofport->netdev, &flags) && flags & NETDEV_UP) {
322 counters->ifStatus = 1; /* ifAdminStatus up. */
323 if (netdev_get_carrier(dsp->ofport->netdev)) {
324 counters->ifStatus |= 2; /* ifOperStatus us. */
327 counters->ifStatus = 0; /* Down. */
331 1. Is the multicast counter filled in?
332 2. Does the multicast counter include broadcasts?
333 3. Does the rx_packets counter include multicasts/broadcasts?
335 ofproto_port_get_stats(dsp->ofport, &stats);
336 counters->ifInOctets = stats.rx_bytes;
337 counters->ifInUcastPkts = stats.rx_packets;
338 counters->ifInMulticastPkts = stats.multicast;
339 counters->ifInBroadcastPkts = -1;
340 counters->ifInDiscards = stats.rx_dropped;
341 counters->ifInErrors = stats.rx_errors;
342 counters->ifInUnknownProtos = -1;
343 counters->ifOutOctets = stats.tx_bytes;
344 counters->ifOutUcastPkts = stats.tx_packets;
345 counters->ifOutMulticastPkts = -1;
346 counters->ifOutBroadcastPkts = -1;
347 counters->ifOutDiscards = stats.tx_dropped;
348 counters->ifOutErrors = stats.tx_errors;
349 counters->ifPromiscuousMode = 0;
351 SFLADD_ELEMENT(cs, &elem);
353 /* Include LACP counters and identifiers if this port is part of a LAG. */
354 if (ofproto_port_get_lacp_stats(dsp->ofport, &lacp_stats) == 0) {
355 memset(&lacp_elem, 0, sizeof lacp_elem);
356 lacp_elem.tag = SFLCOUNTERS_LACP;
357 memcpy(&lacp_elem.counterBlock.lacp.actorSystemID,
358 lacp_stats.dot3adAggPortActorSystemID,
360 memcpy(&lacp_elem.counterBlock.lacp.partnerSystemID,
361 lacp_stats.dot3adAggPortPartnerOperSystemID,
363 lacp_elem.counterBlock.lacp.attachedAggID =
364 lacp_stats.dot3adAggPortAttachedAggID;
365 lacp_elem.counterBlock.lacp.portState.v.actorAdmin =
366 lacp_stats.dot3adAggPortActorAdminState;
367 lacp_elem.counterBlock.lacp.portState.v.actorOper =
368 lacp_stats.dot3adAggPortActorOperState;
369 lacp_elem.counterBlock.lacp.portState.v.partnerAdmin =
370 lacp_stats.dot3adAggPortPartnerAdminState;
371 lacp_elem.counterBlock.lacp.portState.v.partnerOper =
372 lacp_stats.dot3adAggPortPartnerOperState;
373 lacp_elem.counterBlock.lacp.LACPDUsRx =
374 lacp_stats.dot3adAggPortStatsLACPDUsRx;
375 SFL_UNDEF_COUNTER(lacp_elem.counterBlock.lacp.markerPDUsRx);
376 SFL_UNDEF_COUNTER(lacp_elem.counterBlock.lacp.markerResponsePDUsRx);
377 SFL_UNDEF_COUNTER(lacp_elem.counterBlock.lacp.unknownRx);
378 lacp_elem.counterBlock.lacp.illegalRx =
379 lacp_stats.dot3adAggPortStatsIllegalRx;
380 lacp_elem.counterBlock.lacp.LACPDUsTx =
381 lacp_stats.dot3adAggPortStatsLACPDUsTx;
382 SFL_UNDEF_COUNTER(lacp_elem.counterBlock.lacp.markerPDUsTx);
383 SFL_UNDEF_COUNTER(lacp_elem.counterBlock.lacp.markerResponsePDUsTx);
384 SFLADD_ELEMENT(cs, &lacp_elem);
387 /* Include Port name. */
388 if ((ifName = netdev_get_name(dsp->ofport->netdev)) != NULL) {
389 memset(&name_elem, 0, sizeof name_elem);
390 name_elem.tag = SFLCOUNTERS_PORTNAME;
391 name_elem.counterBlock.portName.portName.str = (char *)ifName;
392 name_elem.counterBlock.portName.portName.len = strlen(ifName);
393 SFLADD_ELEMENT(cs, &name_elem);
396 /* Include OpenFlow DPID and openflow port number. */
397 memset(&of_elem, 0, sizeof of_elem);
398 of_elem.tag = SFLCOUNTERS_OPENFLOWPORT;
399 of_elem.counterBlock.ofPort.datapath_id =
400 ofproto_get_datapath_id(dsp->ofport->ofproto);
401 of_elem.counterBlock.ofPort.port_no =
402 (OVS_FORCE uint32_t)dsp->ofport->ofp_port;
403 SFLADD_ELEMENT(cs, &of_elem);
405 sfl_poller_writeCountersSample(poller, cs);
408 /* Obtains an address to use for the local sFlow agent and stores it into
409 * '*agent_addr'. Returns true if successful, false on failure.
411 * The sFlow agent address should be a local IP address that is persistent and
412 * reachable over the network, if possible. The IP address associated with
413 * 'agent_device' is used if it has one, and otherwise 'control_ip', the IP
414 * address used to talk to the controller. If the agent device is not
415 * specified then it is figured out by taking a look at the routing table based
418 sflow_choose_agent_address(const char *agent_device,
419 const struct sset *targets,
420 const char *control_ip,
421 SFLAddress *agent_addr)
426 memset(agent_addr, 0, sizeof *agent_addr);
427 agent_addr->type = SFLADDRESSTYPE_IP_V4;
430 if (!netdev_get_in4_by_name(agent_device, &in4)) {
435 SSET_FOR_EACH (target, targets) {
437 struct sockaddr_storage ss;
438 struct sockaddr_in sin;
442 if (inet_parse_active(target, SFL_DEFAULT_COLLECTOR_PORT, &sa.ss)
443 && sa.ss.ss_family == AF_INET) {
446 if (ovs_router_lookup(sa.sin.sin_addr.s_addr, name, &gw)
447 && !netdev_get_in4_by_name(name, &in4)) {
453 if (control_ip && !lookup_ip(control_ip, &in4)) {
457 VLOG_ERR("could not determine IP address for sFlow agent");
461 agent_addr->address.ip_v4.addr = (OVS_FORCE uint32_t) in4.s_addr;
466 dpif_sflow_clear__(struct dpif_sflow *ds) OVS_REQUIRES(mutex)
468 if (ds->sflow_agent) {
469 sflow_global_counters_subid_clear(ds->sflow_agent->subId);
470 sfl_agent_release(ds->sflow_agent);
471 free(ds->sflow_agent);
472 ds->sflow_agent = NULL;
474 collectors_destroy(ds->collectors);
475 ds->collectors = NULL;
476 ofproto_sflow_options_destroy(ds->options);
479 /* Turn off sampling to save CPU cycles. */
484 dpif_sflow_clear(struct dpif_sflow *ds) OVS_EXCLUDED(mutex)
486 ovs_mutex_lock(&mutex);
487 dpif_sflow_clear__(ds);
488 ovs_mutex_unlock(&mutex);
492 dpif_sflow_is_enabled(const struct dpif_sflow *ds) OVS_EXCLUDED(mutex)
496 ovs_mutex_lock(&mutex);
497 enabled = ds->collectors != NULL;
498 ovs_mutex_unlock(&mutex);
503 dpif_sflow_create(void)
505 static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
506 struct dpif_sflow *ds;
508 if (ovsthread_once_start(&once)) {
509 ovs_mutex_init_recursive(&mutex);
510 ovsthread_once_done(&once);
513 ds = xcalloc(1, sizeof *ds);
514 ds->next_tick = time_now() + 1;
515 hmap_init(&ds->ports);
517 ovs_refcount_init(&ds->ref_cnt);
523 dpif_sflow_ref(const struct dpif_sflow *ds_)
525 struct dpif_sflow *ds = CONST_CAST(struct dpif_sflow *, ds_);
527 ovs_refcount_ref(&ds->ref_cnt);
532 /* 32-bit fraction of packets to sample with. A value of 0 samples no packets,
533 * a value of %UINT32_MAX samples all packets and intermediate values sample
534 * intermediate fractions of packets. */
536 dpif_sflow_get_probability(const struct dpif_sflow *ds) OVS_EXCLUDED(mutex)
538 uint32_t probability;
539 ovs_mutex_lock(&mutex);
540 probability = ds->probability;
541 ovs_mutex_unlock(&mutex);
546 dpif_sflow_unref(struct dpif_sflow *ds) OVS_EXCLUDED(mutex)
548 if (ds && ovs_refcount_unref_relaxed(&ds->ref_cnt) == 1) {
549 struct dpif_sflow_port *dsp, *next;
551 dpif_sflow_clear(ds);
552 HMAP_FOR_EACH_SAFE (dsp, next, hmap_node, &ds->ports) {
553 dpif_sflow_del_port__(ds, dsp);
555 hmap_destroy(&ds->ports);
561 dpif_sflow_add_poller(struct dpif_sflow *ds, struct dpif_sflow_port *dsp)
564 SFLPoller *poller = sfl_agent_addPoller(ds->sflow_agent, &dsp->dsi, ds,
565 sflow_agent_get_counters);
566 sfl_poller_set_sFlowCpInterval(poller, ds->options->polling_interval);
567 sfl_poller_set_sFlowCpReceiver(poller, RECEIVER_INDEX);
568 sfl_poller_set_bridgePort(poller, odp_to_u32(dsp->odp_port));
572 dpif_sflow_add_port(struct dpif_sflow *ds, struct ofport *ofport,
573 odp_port_t odp_port) OVS_EXCLUDED(mutex)
575 struct dpif_sflow_port *dsp;
578 ovs_mutex_lock(&mutex);
579 dpif_sflow_del_port(ds, odp_port);
581 ifindex = netdev_get_ifindex(ofport->netdev);
584 /* Not an ifindex port, so do not add a cross-reference to it here */
588 /* Add to table of ports. */
589 dsp = xmalloc(sizeof *dsp);
590 dsp->ofport = ofport;
591 dsp->odp_port = odp_port;
592 SFL_DS_SET(dsp->dsi, SFL_DSCLASS_IFINDEX, ifindex, 0);
593 hmap_insert(&ds->ports, &dsp->hmap_node, hash_odp_port(odp_port));
596 if (ds->sflow_agent) {
597 dpif_sflow_add_poller(ds, dsp);
601 ovs_mutex_unlock(&mutex);
605 dpif_sflow_del_port__(struct dpif_sflow *ds, struct dpif_sflow_port *dsp)
608 if (ds->sflow_agent) {
609 sfl_agent_removePoller(ds->sflow_agent, &dsp->dsi);
610 sfl_agent_removeSampler(ds->sflow_agent, &dsp->dsi);
612 hmap_remove(&ds->ports, &dsp->hmap_node);
617 dpif_sflow_del_port(struct dpif_sflow *ds, odp_port_t odp_port)
620 struct dpif_sflow_port *dsp;
622 ovs_mutex_lock(&mutex);
623 dsp = dpif_sflow_find_port(ds, odp_port);
625 dpif_sflow_del_port__(ds, dsp);
627 ovs_mutex_unlock(&mutex);
631 dpif_sflow_set_options(struct dpif_sflow *ds,
632 const struct ofproto_sflow_options *options)
635 struct dpif_sflow_port *dsp;
636 bool options_changed;
637 SFLReceiver *receiver;
640 SFLDataSource_instance dsi;
645 ovs_mutex_lock(&mutex);
646 if (sset_is_empty(&options->targets) || !options->sampling_rate) {
647 /* No point in doing any work if there are no targets or nothing to
649 dpif_sflow_clear__(ds);
653 options_changed = (!ds->options
654 || !ofproto_sflow_options_equal(options, ds->options));
656 /* Configure collectors if options have changed or if we're shortchanged in
657 * collectors (which indicates that opening one or more of the configured
658 * collectors failed, so that we should retry). */
660 || collectors_count(ds->collectors) < sset_count(&options->targets)) {
661 collectors_destroy(ds->collectors);
662 collectors_create(&options->targets, SFL_DEFAULT_COLLECTOR_PORT,
664 if (ds->collectors == NULL) {
665 VLOG_WARN_RL(&rl, "no collectors could be initialized, "
667 dpif_sflow_clear__(ds);
672 /* Choose agent IP address and agent device (if not yet setup) */
673 if (!sflow_choose_agent_address(options->agent_device,
675 options->control_ip, &agentIP)) {
676 dpif_sflow_clear__(ds);
680 /* Avoid reconfiguring if options didn't change. */
681 if (!options_changed) {
684 ofproto_sflow_options_destroy(ds->options);
685 ds->options = ofproto_sflow_options_clone(options);
688 VLOG_INFO("creating sFlow agent %d", options->sub_id);
689 if (ds->sflow_agent) {
690 sflow_global_counters_subid_clear(ds->sflow_agent->subId);
691 sfl_agent_release(ds->sflow_agent);
693 ds->sflow_agent = xcalloc(1, sizeof *ds->sflow_agent);
695 sfl_agent_init(ds->sflow_agent,
698 now, /* Boot time. */
699 now, /* Current time. */
700 ds, /* Pointer supplied to callbacks. */
701 sflow_agent_alloc_cb,
703 sflow_agent_error_cb,
704 sflow_agent_send_packet_cb);
706 receiver = sfl_agent_addReceiver(ds->sflow_agent);
707 sfl_receiver_set_sFlowRcvrOwner(receiver, "Open vSwitch sFlow");
708 sfl_receiver_set_sFlowRcvrTimeout(receiver, 0xffffffff);
710 /* Set the sampling_rate down in the datapath. */
711 ds->probability = MAX(1, UINT32_MAX / ds->options->sampling_rate);
713 /* Add a single sampler for the bridge. This appears as a PHYSICAL_ENTITY
714 because it is associated with the hypervisor, and interacts with the server
715 hardware directly. The sub_id is used to distinguish this sampler from
716 others on other bridges within the same agent. */
717 dsIndex = 1000 + options->sub_id;
718 SFL_DS_SET(dsi, SFL_DSCLASS_PHYSICAL_ENTITY, dsIndex, 0);
719 sampler = sfl_agent_addSampler(ds->sflow_agent, &dsi);
720 sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, ds->options->sampling_rate);
721 sfl_sampler_set_sFlowFsMaximumHeaderSize(sampler, ds->options->header_len);
722 sfl_sampler_set_sFlowFsReceiver(sampler, RECEIVER_INDEX);
724 /* Add a counter poller for the bridge so we can use it to send
725 global counters such as datapath cache hit/miss stats. */
726 poller = sfl_agent_addPoller(ds->sflow_agent, &dsi, ds,
727 sflow_agent_get_global_counters);
728 sfl_poller_set_sFlowCpInterval(poller, ds->options->polling_interval);
729 sfl_poller_set_sFlowCpReceiver(poller, RECEIVER_INDEX);
731 /* Add pollers for the currently known ifindex-ports */
732 HMAP_FOR_EACH (dsp, hmap_node, &ds->ports) {
733 dpif_sflow_add_poller(ds, dsp);
738 ovs_mutex_unlock(&mutex);
742 dpif_sflow_odp_port_to_ifindex(const struct dpif_sflow *ds,
743 odp_port_t odp_port) OVS_EXCLUDED(mutex)
745 struct dpif_sflow_port *dsp;
748 ovs_mutex_lock(&mutex);
749 dsp = dpif_sflow_find_port(ds, odp_port);
750 ret = dsp ? SFL_DS_INDEX(dsp->dsi) : 0;
751 ovs_mutex_unlock(&mutex);
756 dpif_sflow_received(struct dpif_sflow *ds, const struct dp_packet *packet,
757 const struct flow *flow, odp_port_t odp_in_port,
758 const union user_action_cookie *cookie)
761 SFL_FLOW_SAMPLE_TYPE fs;
762 SFLFlow_sample_element hdrElem;
763 SFLSampled_header *header;
764 SFLFlow_sample_element switchElem;
766 struct dpif_sflow_port *in_dsp;
769 ovs_mutex_lock(&mutex);
770 sampler = ds->sflow_agent->samplers;
775 /* Build a flow sample. */
776 memset(&fs, 0, sizeof fs);
778 /* Look up the input ifIndex if this port has one. Otherwise just
779 * leave it as 0 (meaning 'unknown') and continue. */
780 in_dsp = dpif_sflow_find_port(ds, odp_in_port);
782 fs.input = SFL_DS_INDEX(in_dsp->dsi);
785 /* Make the assumption that the random number generator in the datapath converges
786 * to the configured mean, and just increment the samplePool by the configured
787 * sampling rate every time. */
788 sampler->samplePool += sfl_sampler_get_sFlowFsPacketSamplingRate(sampler);
790 /* Sampled header. */
791 memset(&hdrElem, 0, sizeof hdrElem);
792 hdrElem.tag = SFLFLOW_HEADER;
793 header = &hdrElem.flowType.header;
794 header->header_protocol = SFLHEADER_ETHERNET_ISO8023;
795 /* The frame_length should include the Ethernet FCS (4 bytes),
796 * but it has already been stripped, so we need to add 4 here. */
797 header->frame_length = dp_packet_size(packet) + 4;
798 /* Ethernet FCS stripped off. */
799 header->stripped = 4;
800 header->header_length = MIN(dp_packet_size(packet),
801 sampler->sFlowFsMaximumHeaderSize);
802 header->header_bytes = dp_packet_data(packet);
804 /* Add extended switch element. */
805 memset(&switchElem, 0, sizeof(switchElem));
806 switchElem.tag = SFLFLOW_EX_SWITCH;
807 switchElem.flowType.sw.src_vlan = vlan_tci_to_vid(flow->vlan_tci);
808 switchElem.flowType.sw.src_priority = vlan_tci_to_pcp(flow->vlan_tci);
810 /* Retrieve data from user_action_cookie. */
811 vlan_tci = cookie->sflow.vlan_tci;
812 switchElem.flowType.sw.dst_vlan = vlan_tci_to_vid(vlan_tci);
813 switchElem.flowType.sw.dst_priority = vlan_tci_to_pcp(vlan_tci);
815 fs.output = cookie->sflow.output;
817 /* Submit the flow sample to be encoded into the next datagram. */
818 SFLADD_ELEMENT(&fs, &hdrElem);
819 SFLADD_ELEMENT(&fs, &switchElem);
820 sfl_sampler_writeFlowSample(sampler, &fs);
823 ovs_mutex_unlock(&mutex);
827 dpif_sflow_run(struct dpif_sflow *ds) OVS_EXCLUDED(mutex)
829 ovs_mutex_lock(&mutex);
830 if (ds->collectors != NULL) {
831 time_t now = time_now();
833 if (now >= ds->next_tick) {
834 sfl_agent_tick(ds->sflow_agent, time_wall());
835 ds->next_tick = now + 1;
838 ovs_mutex_unlock(&mutex);
842 dpif_sflow_wait(struct dpif_sflow *ds) OVS_EXCLUDED(mutex)
844 ovs_mutex_lock(&mutex);
845 if (ds->collectors != NULL) {
846 poll_timer_wait_until(ds->next_tick * 1000LL);
848 ovs_mutex_unlock(&mutex);