| /* |
| * Copyright 2018-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onosproject.segmentrouting; |
| |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.stream.Collectors; |
| |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.Device; |
| import org.onosproject.net.DeviceId; |
| import org.onosproject.net.HostLocation; |
| import org.onosproject.net.Link; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.link.LinkService; |
| import org.onosproject.segmentrouting.config.DeviceConfigNotFoundException; |
| import org.onosproject.segmentrouting.grouphandler.DefaultGroupHandler; |
| import org.onosproject.store.service.EventuallyConsistentMap; |
| import org.onosproject.store.service.EventuallyConsistentMapBuilder; |
| import org.onosproject.store.service.WallClockTimestamp; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Sets; |
| |
| |
| public class LinkHandler { |
| private static final Logger log = LoggerFactory.getLogger(LinkHandler.class); |
| protected final SegmentRoutingManager srManager; |
| |
| // Local store for all links seen and their present status, used for |
| // optimized routing. The existence of the link in the keys is enough to know |
| // if the link has been "seen-before" by this instance of the controller. |
| // The boolean value indicates if the link is currently up or not. |
| // Currently the optimized routing logic depends on "forgetting" a link |
| // when a switch goes down, but "remembering" it when only the link goes down. |
| private Map<Link, Boolean> seenLinks = new ConcurrentHashMap<>(); |
| private Set<Link> seenBefore = Sets.newConcurrentHashSet(); |
| private EventuallyConsistentMap<DeviceId, Set<PortNumber>> downedPortStore = null; |
| |
| /** |
| * Constructs the LinkHandler. |
| * |
| * @param srManager Segment Routing manager |
| */ |
| LinkHandler(SegmentRoutingManager srManager) { |
| this.srManager = srManager; |
| log.debug("Creating EC map downedportstore"); |
| EventuallyConsistentMapBuilder<DeviceId, Set<PortNumber>> downedPortsMapBuilder |
| = srManager.storageService.eventuallyConsistentMapBuilder(); |
| downedPortStore = downedPortsMapBuilder.withName("downedportstore") |
| .withSerializer(srManager.createSerializer()) |
| .withTimestampProvider((k, v) -> new WallClockTimestamp()) |
| .build(); |
| log.trace("Current size {}", downedPortStore.size()); |
| } |
| |
| /** |
| * Constructs the LinkHandler for unit-testing. |
| * |
| * @param srManager SegmentRoutingManager |
| * @param linkService LinkService |
| */ |
| LinkHandler(SegmentRoutingManager srManager, LinkService linkService) { |
| this.srManager = srManager; |
| } |
| |
| /** |
| * Initialize LinkHandler. |
| */ |
| void init() { |
| log.info("Loading stored links"); |
| srManager.linkService.getActiveLinks().forEach(this::processLinkAdded); |
| } |
| |
| /** |
| * Preprocessing of added link before being sent for route-path handling. |
| * Also performs post processing of link. |
| * |
| * @param link the link to be processed |
| */ |
| void processLinkAdded(Link link) { |
| log.info("** LINK ADDED {}", link.toString()); |
| if (!isLinkValid(link)) { |
| return; |
| } |
| // Irrespective of whether the local is a MASTER or not for this device, |
| // create group handler instance and push default TTP flow rules if needed, |
| // as in a multi-instance setup, instances can initiate groups for any |
| // device. Also update local groupHandler stores. |
| DefaultGroupHandler groupHandler = srManager.groupHandlerMap |
| .get(link.src().deviceId()); |
| if (groupHandler == null) { |
| Device device = srManager.deviceService.getDevice(link.src().deviceId()); |
| if (device != null) { |
| log.warn("processLinkAdded: Link Added notification without " |
| + "Device Added event, still handling it"); |
| srManager.processDeviceAdded(device); |
| } |
| } |
| |
| if (isSeenLink(link)) { |
| // temp store retains previous state, just before the state is updated in |
| // seenLinks; previous state is necessary when processing the |
| // linkupdate in defaultRoutingHandler |
| seenBefore.add(link); |
| } |
| updateSeenLink(link, true); |
| |
| if (srManager.deviceConfiguration == null || |
| !srManager.deviceConfiguration.isConfigured(link.src().deviceId())) { |
| log.warn("Source device of this link is not configured.. " |
| + "not processing further"); |
| return; |
| } |
| |
| // process link only if it is bidirectional |
| if (!isBidirectionalLinkUp(link)) { |
| log.debug("Link not bidirectional.. waiting for other direction " + |
| "src {} --> dst {} ", link.dst(), link.src()); |
| return; |
| } |
| |
| log.info("processing bidi links {} <--> {} UP", link.src(), link.dst()); |
| // update groupHandler internal port state for both directions |
| List<Link> ulinks = getBidiComponentLinks(link); |
| for (Link ulink : ulinks) { |
| DefaultGroupHandler gh = srManager.groupHandlerMap |
| .get(ulink.src().deviceId()); |
| if (gh != null) { |
| gh.portUpForLink(ulink); |
| } |
| } |
| |
| for (Link ulink : ulinks) { |
| log.info("-- Starting optimized route-path processing for component " |
| + "unidirectional link {} --> {} UP", ulink.src(), ulink.dst()); |
| // Performs the seenBefore optimization iff we have seen before both links in that case |
| // we have programmed the group (unless there were major issues in the system) |
| srManager.defaultRoutingHandler |
| .populateRoutingRulesForLinkStatusChange(null, ulink, null, |
| (seenBefore.contains(ulink) && seenBefore.contains(getReverseLink(ulink)))); |
| |
| if (srManager.mastershipService.isLocalMaster(ulink.src().deviceId())) { |
| // handle edge-ports for dual-homed hosts |
| updateHostPorts(ulink, true); |
| |
| // It's possible that linkUp causes no route-path change as ECMP graph does |
| // not change if the link is a parallel link (same src-dst as |
| // another link). However we still need to update ECMP hash |
| // groups to include new buckets for the link that has come up. |
| DefaultGroupHandler gh = srManager.groupHandlerMap |
| .get(ulink.src().deviceId()); |
| if (gh != null) { |
| if (!seenBefore.contains(ulink) && isParallelLink(ulink)) { |
| // if link seen first time, we need to ensure hash-groups have |
| // all ports |
| log.debug("Attempting retryHash for paralled first-time link {}", |
| ulink); |
| gh.retryHash(ulink, false, true); |
| } else { |
| // seen before-link |
| if (isParallelLink(ulink)) { |
| log.debug("Attempting retryHash for paralled seen-before " |
| + "link {}", ulink); |
| gh.retryHash(ulink, false, false); |
| } |
| } |
| } |
| } |
| //clean up temp state |
| seenBefore.remove(ulink); |
| } |
| |
| } |
| |
| /** |
| * Preprocessing of removed link before being sent for route-path handling. |
| * Also performs post processing of link. |
| * |
| * @param link the link to be processed |
| */ |
| void processLinkRemoved(Link link) { |
| log.info("** LINK REMOVED {}", link.toString()); |
| if (!isLinkValid(link)) { |
| return; |
| } |
| // when removing links, update seen links first, before doing route-path |
| // changes. Link should be already there because was up before. If not, |
| // we should not update the store. This could be a LINK DOWN happening |
| // after a DEVICE DOWN event. |
| if (isSeenLink(link)) { |
| updateSeenLink(link, false); |
| } else { |
| // Exiting here may not be needed since other checks later should fail |
| log.warn("received a link down for the link {} which is not in the store", link); |
| } |
| // handle edge-ports for dual-homed hosts |
| if (srManager.mastershipService.isLocalMaster(link.src().deviceId())) { |
| updateHostPorts(link, false); |
| } |
| |
| // device availability check helps to ensure that multiple link-removed |
| // events are actually treated as a single switch removed event. |
| // purgeSeenLink is necessary so we do rerouting (instead of rehashing) |
| // when switch comes back. |
| if (link.src().elementId() instanceof DeviceId |
| && !srManager.deviceService.isAvailable(link.src().deviceId())) { |
| purgeSeenLink(link); |
| return; |
| } |
| if (link.dst().elementId() instanceof DeviceId |
| && !srManager.deviceService.isAvailable(link.dst().deviceId())) { |
| purgeSeenLink(link); |
| return; |
| } |
| |
| // process link only if it is bidirectional |
| if (!isBidirectionalLinkDown(link)) { |
| log.debug("Link not bidirectional.. waiting for other direction " + |
| "src {} --> dst {} ", link.dst(), link.src()); |
| return; |
| } |
| log.info("processing bidi links {} <--> {} DOWN", link.src(), link.dst()); |
| |
| for (Link ulink : getBidiComponentLinks(link)) { |
| log.info("-- Starting optimized route-path processing for component " |
| + "unidirectional link {} --> {} DOWN", ulink.src(), ulink.dst()); |
| srManager.defaultRoutingHandler |
| .populateRoutingRulesForLinkStatusChange(ulink, null, null, true); |
| |
| // attempt rehashing for parallel links |
| DefaultGroupHandler groupHandler = srManager.groupHandlerMap |
| .get(ulink.src().deviceId()); |
| if (groupHandler != null) { |
| if (srManager.mastershipService.isLocalMaster(ulink.src().deviceId()) |
| && isParallelLink(ulink)) { |
| log.debug("* retrying hash for parallel link removed:{}", ulink); |
| groupHandler.retryHash(ulink, true, false); |
| } else { |
| log.debug("Not attempting retry-hash for link removed: {} .. {}", |
| ulink, |
| (srManager.mastershipService.isLocalMaster(ulink |
| .src().deviceId())) ? "not parallel" |
| : "not master"); |
| } |
| // ensure local stores are updated after all rerouting or rehashing |
| groupHandler.portDownForLink(ulink); |
| } else { |
| log.warn("group handler not found for dev:{} when removing link: {}", |
| ulink.src().deviceId(), ulink); |
| } |
| } |
| } |
| |
| /** |
| * Checks validity of link. Examples of invalid links include |
| * indirect-links, links between ports on the same switch, and more. |
| * |
| * @param link the link to be processed |
| * @return true if valid link |
| */ |
| boolean isLinkValid(Link link) { |
| if (link.type() != Link.Type.DIRECT) { |
| // NOTE: A DIRECT link might be transiently marked as INDIRECT |
| // if BDDP is received before LLDP. We can safely ignore that |
| // until the LLDP is received and the link is marked as DIRECT. |
| log.info("Ignore link {}->{}. Link type is {} instead of DIRECT.", |
| link.src(), link.dst(), link.type()); |
| return false; |
| } |
| DeviceId srcId = link.src().deviceId(); |
| DeviceId dstId = link.dst().deviceId(); |
| if (srcId.equals(dstId)) { |
| log.warn("Links between ports on the same switch are not " |
| + "allowed .. ignoring link {}", link); |
| return false; |
| } |
| DeviceConfiguration devConfig = srManager.deviceConfiguration; |
| if (devConfig == null) { |
| log.warn("Cannot check validity of link without device config"); |
| return true; |
| } |
| try { |
| /*if (!devConfig.isEdgeDevice(srcId) |
| && !devConfig.isEdgeDevice(dstId)) { |
| // ignore links between spines |
| // XXX revisit when handling multi-stage fabrics |
| log.warn("Links between spines not allowed...ignoring " |
| + "link {}", link); |
| return false; |
| }*/ |
| if (devConfig.isEdgeDevice(srcId) |
| && devConfig.isEdgeDevice(dstId)) { |
| // ignore links between leaves if they are not pair-links |
| // XXX revisit if removing pair-link config or allowing more than |
| // one pair-link |
| if (devConfig.getPairDeviceId(srcId).equals(dstId) |
| && devConfig.getPairLocalPort(srcId) |
| .equals(link.src().port()) |
| && devConfig.getPairLocalPort(dstId) |
| .equals(link.dst().port())) { |
| // found pair link - allow it |
| return true; |
| } else { |
| log.warn("Links between leaves other than pair-links are " |
| + "not allowed...ignoring link {}", link); |
| return false; |
| } |
| } |
| } catch (DeviceConfigNotFoundException e) { |
| // We still want to count the links in seenLinks even though there |
| // is no config. So we let it return true |
| log.warn("Could not check validity of link {} as subtending devices " |
| + "are not yet configured", link); |
| } |
| return true; |
| } |
| |
| /** |
| * Administratively enables or disables edge ports if the link that was |
| * added or removed was the only uplink port from an edge device. Edge ports |
| * that belong to dual-homed hosts are always processed. In addition, |
| * single-homed host ports are optionally processed depending on the |
| * singleHomedDown property. |
| * |
| * @param link the link to be processed |
| * @param added true if link was added, false if link was removed |
| */ |
| private void updateHostPorts(Link link, boolean added) { |
| // Topology has only a single pair of leaves |
| if (srManager.getInfraDeviceIds().isEmpty()) { |
| log.debug("No spine configured. Not updating edge port for {} {}", link, added ? "add" : "remove"); |
| return; |
| } |
| |
| DeviceConfiguration devConfig = srManager.deviceConfiguration; |
| if (added) { |
| try { |
| if (!devConfig.isEdgeDevice(link.src().deviceId()) |
| || devConfig.isEdgeDevice(link.dst().deviceId())) { |
| return; |
| } |
| } catch (DeviceConfigNotFoundException e) { |
| log.warn("Unable to determine if link is a valid uplink" |
| + e.getMessage()); |
| } |
| // re-enable previously disabled ports on this edge-device if any |
| Set<PortNumber> p = downedPortStore.remove(link.src().deviceId()); |
| if (p != null) { |
| log.warn("Link src {} --> dst {} added is an edge-device uplink, " |
| + "enabling dual homed ports if any: {}", link.src().deviceId(), |
| link.dst().deviceId(), (p.isEmpty()) ? "no ports" : p); |
| p.forEach(pnum -> srManager.deviceAdminService |
| .changePortState(link.src().deviceId(), pnum, true)); |
| } |
| } else { |
| // If the device does not have a pair device - skip |
| DeviceId dev = link.src().deviceId(); |
| if (getPairDeviceIdOrNull(dev) == null) { |
| log.info("Device {} does not have pair device " + |
| "not disabling access port", dev); |
| return; |
| } |
| // Verify if last uplink |
| if (!lastUplink(link)) { |
| return; |
| } |
| // find dual homed hosts on this dev to disable |
| Set<PortNumber> dp = srManager.hostHandler |
| .getDualHomedHostPorts(dev); |
| log.warn("Link src {} --> dst {} removed was the last uplink, " |
| + "disabling dual homed ports: {}", dev, |
| link.dst().deviceId(), (dp.isEmpty()) ? "no ports" : dp); |
| dp.forEach(pnum -> srManager.deviceAdminService |
| .changePortState(dev, pnum, false)); |
| if (srManager.singleHomedDown) { |
| // get all configured ports and down them if they haven't already |
| // been downed |
| srManager.deviceService.getPorts(dev).stream() |
| .filter(p -> p.isEnabled() && !dp.contains(p.number())) |
| .filter(p -> srManager.interfaceService |
| .isConfigured(new ConnectPoint(dev, p.number()))) |
| .filter(p -> !srManager.deviceConfiguration |
| .isPairLocalPort(dev, p.number())) |
| .forEach(p -> { |
| log.warn("Last uplink gone src {} -> dst {} .. removing " |
| + "configured port {}", p.number()); |
| srManager.deviceAdminService |
| .changePortState(dev, p.number(), false); |
| dp.add(p.number()); |
| }); |
| } |
| if (!dp.isEmpty()) { |
| // update global store |
| Set<PortNumber> p = downedPortStore.get(dev); |
| if (p == null) { |
| p = dp; |
| } else { |
| p.addAll(dp); |
| } |
| downedPortStore.put(link.src().deviceId(), p); |
| } |
| } |
| } |
| |
| /** |
| * Returns true if given link was the last active uplink from src-device of |
| * link. An uplink is defined as a unidirectional link with src as |
| * edgeRouter and dst as non-edgeRouter. |
| * |
| * @param link |
| * @return true if given link was the last uplink from the src device |
| */ |
| private boolean lastUplink(Link link) { |
| DeviceConfiguration devConfig = srManager.deviceConfiguration; |
| try { |
| if (!devConfig.isEdgeDevice(link.src().deviceId()) |
| || devConfig.isEdgeDevice(link.dst().deviceId())) { |
| return false; |
| } |
| // note that using linkservice here would cause race conditions as |
| // more links can show up while the app is still processing the first one |
| Set<Link> devLinks = seenLinks.entrySet().stream() |
| .filter(entry -> entry.getKey().src().deviceId() |
| .equals(link.src().deviceId())) |
| .filter(entry -> entry.getValue()) |
| .filter(entry -> !entry.getKey().equals(link)) |
| .map(entry -> entry.getKey()) |
| .collect(Collectors.toSet()); |
| |
| for (Link l : devLinks) { |
| if (devConfig.isEdgeDevice(l.dst().deviceId())) { |
| continue; |
| } |
| log.debug("Found another active uplink {}", l); |
| return false; |
| } |
| log.debug("No active uplink found"); |
| return true; |
| } catch (DeviceConfigNotFoundException e) { |
| log.warn("Unable to determine if link was the last uplink" |
| + e.getMessage()); |
| } |
| return false; |
| } |
| |
| /** |
| * Returns true if this controller instance has seen this link before. The |
| * link may not be currently up, but as long as the link had been seen |
| * before this method will return true. The one exception is when the link |
| * was indeed seen before, but this controller instance was forced to forget |
| * it by a call to purgeSeenLink method. |
| * |
| * @param link the infrastructure link being queried |
| * @return true if this controller instance has seen this link before |
| */ |
| boolean isSeenLink(Link link) { |
| return seenLinks.containsKey(link); |
| } |
| |
| /** |
| * Updates the seen link store. Updates can be for links that are currently |
| * available or not. |
| * |
| * @param link the link to update in the seen-link local store |
| * @param up the status of the link, true if up, false if down |
| */ |
| void updateSeenLink(Link link, boolean up) { |
| seenLinks.put(link, up); |
| } |
| |
| /** |
| * Returns the status of a seen-link (up or down). If the link has not been |
| * seen-before, a null object is returned. |
| * |
| * @param link the infrastructure link being queried |
| * @return null if the link was not seen-before; true if the seen-link is |
| * up; false if the seen-link is down |
| */ |
| private Boolean isSeenLinkUp(Link link) { |
| return seenLinks.get(link); |
| } |
| |
| /** |
| * Makes this controller instance forget a previously seen before link. |
| * |
| * @param link the infrastructure link to purge |
| */ |
| private void purgeSeenLink(Link link) { |
| seenLinks.remove(link); |
| seenBefore.remove(link); |
| } |
| |
| /** |
| * Returns the status of a link as parallel link. A parallel link is defined |
| * as a link which has common src and dst switches as another seen-link that |
| * is currently enabled. It is not necessary for the link being queried to |
| * be a seen-link. |
| * |
| * @param link the infrastructure link being queried |
| * @return true if a seen-link exists that is up, and shares the same src |
| * and dst switches as the link being queried |
| */ |
| private boolean isParallelLink(Link link) { |
| for (Entry<Link, Boolean> seen : seenLinks.entrySet()) { |
| Link seenLink = seen.getKey(); |
| if (seenLink.equals(link)) { |
| continue; |
| } |
| if (seenLink.src().deviceId().equals(link.src().deviceId()) |
| && seenLink.dst().deviceId().equals(link.dst().deviceId()) |
| && seen.getValue()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Returns true if the link being queried is a bidirectional link that is |
| * up. A bidi-link is defined as a component unidirectional link, whose |
| * reverse link - ie. the component unidirectional link in the reverse |
| * direction - has been seen-before and is up. It is NOT necessary for the |
| * link being queried to be a previously seen-link. |
| * |
| * @param link the infrastructure (unidirectional) link being queried |
| * @return true if another unidirectional link exists in the reverse |
| * direction, has been seen-before and is up |
| */ |
| boolean isBidirectionalLinkUp(Link link) { |
| // cannot call linkService as link may be gone |
| Link reverseLink = getReverseLink(link); |
| if (reverseLink == null) { |
| return false; |
| } |
| Boolean result = isSeenLinkUp(reverseLink); |
| if (result == null) { |
| return false; |
| } |
| return result.booleanValue(); |
| } |
| |
| /** |
| * Returns true if the link being queried is a bidirectional link that is |
| * down. A bidi-link is defined as a component unidirectional link, whose |
| * reverse link - i.e the component unidirectional link in the reverse |
| * direction - has been seen before and is down. It is necessary for the |
| * reverse-link to have been previously seen. |
| * |
| * @param link the infrastructure (unidirectional) link being queried |
| * @return true if another unidirectional link exists in the reverse |
| * direction, has been seen-before and is down |
| */ |
| boolean isBidirectionalLinkDown(Link link) { |
| // cannot call linkService as link may be gone |
| Link reverseLink = getReverseLink(link); |
| if (reverseLink == null) { |
| log.warn("Query for bidi-link down but reverse-link not found " |
| + "for link {}", link); |
| return false; |
| } |
| Boolean result = seenLinks.get(reverseLink); |
| if (result == null) { |
| return false; |
| } |
| // if reverse link is seen UP (true), then its not bidi yet |
| return !result.booleanValue(); |
| } |
| |
| /** |
| * Returns the link in the reverse direction from the given link, by |
| * consulting the seen-links store. |
| * |
| * @param link the given link |
| * @return the reverse link or null |
| */ |
| Link getReverseLink(Link link) { |
| return seenLinks.keySet().stream() |
| .filter(l -> l.src().equals(link.dst()) && l.dst().equals(link.src())) |
| .findAny() |
| .orElse(null); |
| } |
| |
| /** |
| * Returns the component unidirectional links of a declared bidirectional |
| * link, by consulting the seen-links store. Caller is responsible for |
| * previously verifying bidirectionality. Returned list may be empty if |
| * errors are encountered. |
| * |
| * @param link the declared bidirectional link |
| * @return list of component unidirectional links |
| */ |
| List<Link> getBidiComponentLinks(Link link) { |
| Link reverseLink = getReverseLink(link); |
| List<Link> componentLinks; |
| if (reverseLink == null) { // really should not happen if link is bidi |
| log.error("cannot find reverse link for given link: {} ... is it " |
| + "bi-directional?", link); |
| componentLinks = ImmutableList.of(); |
| } else { |
| componentLinks = ImmutableList.of(reverseLink, link); |
| } |
| return componentLinks; |
| } |
| |
| /** |
| * Determines if the given link should be avoided in routing calculations by |
| * policy or design. |
| * |
| * @param link the infrastructure link being queried |
| * @return true if link should be avoided |
| */ |
| boolean avoidLink(Link link) { |
| // XXX currently only avoids all pair-links. In the future can be |
| // extended to avoid any generic link |
| DeviceId src = link.src().deviceId(); |
| PortNumber srcPort = link.src().port(); |
| DeviceConfiguration devConfig = srManager.deviceConfiguration; |
| if (devConfig == null || !devConfig.isConfigured(src)) { |
| log.warn("Device {} not configured..cannot avoid link {}", src, |
| link); |
| return false; |
| } |
| DeviceId pairDev; |
| PortNumber pairLocalPort, pairRemotePort = null; |
| try { |
| pairDev = devConfig.getPairDeviceId(src); |
| pairLocalPort = devConfig.getPairLocalPort(src); |
| if (pairDev != null) { |
| pairRemotePort = devConfig |
| .getPairLocalPort(pairDev); |
| } |
| } catch (DeviceConfigNotFoundException e) { |
| log.warn("Pair dev for dev {} not configured..cannot avoid link {}", |
| src, link); |
| return false; |
| } |
| |
| return srcPort.equals(pairLocalPort) |
| && link.dst().deviceId().equals(pairDev) |
| && link.dst().port().equals(pairRemotePort); |
| } |
| |
| /** |
| * Cleans up internal LinkHandler stores. |
| * |
| * @param device the device that has been removed |
| */ |
| void processDeviceRemoved(Device device) { |
| seenLinks.keySet() |
| .removeIf(key -> key.src().deviceId().equals(device.id()) |
| || key.dst().deviceId().equals(device.id())); |
| } |
| |
| /** |
| * Administratively disables the host location switchport if the edge device |
| * has no viable uplinks. The caller needs to determine if such behavior is |
| * desired for the single or dual-homed host. |
| * |
| * @param loc the host location |
| */ |
| void checkUplinksForHost(HostLocation loc) { |
| // Topology has only a single pair of leaves |
| if (srManager.getInfraDeviceIds().isEmpty()) { |
| log.debug("No spine configured. Not disabling access port for {}", loc); |
| return; |
| } |
| |
| // If the device does not have a pair device - return |
| if (getPairDeviceIdOrNull(loc.deviceId()) == null) { |
| log.info("Device {} does not have pair device " + |
| "not disabling access port", loc.deviceId()); |
| return; |
| } |
| |
| // Verify link validity |
| try { |
| for (Link l : srManager.linkService.getDeviceLinks(loc.deviceId())) { |
| if (srManager.deviceConfiguration.isEdgeDevice(l.dst().deviceId()) |
| || l.state() == Link.State.INACTIVE) { |
| continue; |
| } |
| // found valid uplink - so, nothing to do |
| return; |
| } |
| } catch (DeviceConfigNotFoundException e) { |
| log.warn("Could not check for valid uplinks due to missing device" |
| + "config " + e.getMessage()); |
| return; |
| } |
| log.warn("Host location {} has no valid uplinks disabling port", loc); |
| srManager.deviceAdminService.changePortState(loc.deviceId(), loc.port(), |
| false); |
| Set<PortNumber> p = downedPortStore.get(loc.deviceId()); |
| if (p == null) { |
| p = Sets.newHashSet(loc.port()); |
| } else { |
| p.add(loc.port()); |
| } |
| downedPortStore.put(loc.deviceId(), p); |
| } |
| |
| private DeviceId getPairDeviceIdOrNull(DeviceId deviceId) { |
| DeviceId pairDev; |
| try { |
| pairDev = srManager.deviceConfiguration.getPairDeviceId(deviceId); |
| } catch (DeviceConfigNotFoundException e) { |
| pairDev = null; |
| } |
| return pairDev; |
| } |
| |
| ImmutableMap<Link, Boolean> getSeenLinks() { |
| return ImmutableMap.copyOf(seenLinks); |
| } |
| |
| ImmutableMap<DeviceId, Set<PortNumber>> getDownedPorts() { |
| return ImmutableMap.copyOf(downedPortStore.entrySet()); |
| } |
| |
| /** |
| * Returns all links that egress from given device that are UP in the |
| * seenLinks store. The returned links are also confirmed to be |
| * bidirectional. |
| * |
| * @param deviceId the device identifier |
| * @return set of egress links from the device |
| */ |
| Set<Link> getDeviceEgressLinks(DeviceId deviceId) { |
| return seenLinks.keySet().stream() |
| .filter(link -> link.src().deviceId().equals(deviceId)) |
| .filter(link -> seenLinks.get(link)) |
| .filter(link -> isBidirectionalLinkUp(link)) |
| .collect(Collectors.toSet()); |
| } |
| |
| } |