| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package l2topology |
| 4 | |
| 5 | import ( |
| 6 | "strconv" |
| 7 | "strings" |
| 8 | ) |
| 9 | |
| 10 | func (b *segmentProjectionBuilder) allowEndpoint(segmentID, endpointID string, probable bool, probableMode string) { |
| 11 | if strings.TrimSpace(segmentID) == "" || strings.TrimSpace(endpointID) == "" { |
| 12 | return |
| 13 | } |
| 14 | |
| 15 | allowed := b.allowedEndpointBySegment[segmentID] |
| 16 | if allowed == nil { |
| 17 | allowed = make(map[string]struct{}) |
| 18 | b.allowedEndpointBySegment[segmentID] = allowed |
| 19 | } |
| 20 | allowed[endpointID] = struct{}{} |
| 21 | b.assignedEndpoints[endpointID] = struct{}{} |
| 22 | |
| 23 | if !probable { |
| 24 | strictSet := b.strictEndpointBySegment[segmentID] |
| 25 | if strictSet == nil { |
| 26 | strictSet = make(map[string]struct{}) |
| 27 | b.strictEndpointBySegment[segmentID] = strictSet |
| 28 | } |
| 29 | strictSet[endpointID] = struct{}{} |
| 30 | return |
| 31 | } |
| 32 | |
| 33 | probableSet := b.probableEndpointBySegment[segmentID] |
| 34 | if probableSet == nil { |
| 35 | probableSet = make(map[string]struct{}) |
| 36 | b.probableEndpointBySegment[segmentID] = probableSet |
| 37 | } |
| 38 | probableSet[endpointID] = struct{}{} |
| 39 | if strings.TrimSpace(probableMode) == "" { |
| 40 | probableMode = "probable_segment" |
| 41 | } |
| 42 | modes := b.probableAttachmentModes[segmentID] |
| 43 | if modes == nil { |
| 44 | modes = make(map[string]string) |
| 45 | b.probableAttachmentModes[segmentID] = modes |
| 46 | } |
| 47 | modes[endpointID] = probableMode |
| 48 | } |
| 49 | |
| 50 | func (b *segmentProjectionBuilder) initializeEndpointCandidates() []string { |
| 51 | endpointIDs := collectTopologyEndpointIDs( |
| 52 | b.endpointMatchByID, |
| 53 | b.endpointLabelsByID, |
| 54 | b.endpointSegmentCandidates, |
| 55 | b.rawFDBObservations, |
| 56 | b.fdbObservations, |
| 57 | ) |
| 58 | b.baseCandidatesByEndpoint = make(map[string][]string, len(endpointIDs)) |
| 59 | b.probableCandidatesByEP = make(map[string][]string, len(endpointIDs)) |
| 60 | b.strictLinkedEndpoints = make(map[string]struct{}, len(endpointIDs)) |
| 61 | |
| 62 | for _, endpointID := range endpointIDs { |
| 63 | candidates := b.endpointSegmentCandidates[endpointID] |
| 64 | candidateSet := make(map[string]struct{}, len(candidates)) |
| 65 | for _, candidate := range candidates { |
| 66 | candidate = strings.TrimSpace(candidate) |
| 67 | if candidate == "" { |
| 68 | continue |
| 69 | } |
| 70 | candidateSet[candidate] = struct{}{} |
| 71 | } |
| 72 | sortedCandidates := sortedTopologySet(candidateSet) |
| 73 | b.out.endpointLinksCandidates += len(sortedCandidates) |
| 74 | b.baseCandidatesByEndpoint[endpointID] = sortedCandidates |
| 75 | strictSegmentID := "" |
| 76 | probableCandidates := sortedCandidates |
| 77 | if len(sortedCandidates) == 1 { |
| 78 | strictSegmentID = sortedCandidates[0] |
| 79 | } else if owner, ok := b.fdbOwners[endpointID]; ok { |
| 80 | filtered := make([]string, 0, len(sortedCandidates)) |
| 81 | for _, segmentID := range sortedCandidates { |
| 82 | portKeys := b.segmentPortKeys[segmentID] |
| 83 | if len(portKeys) == 0 { |
| 84 | continue |
| 85 | } |
| 86 | if _, matchesOwnerPort := portKeys[owner.portVLANKey]; matchesOwnerPort { |
| 87 | filtered = append(filtered, segmentID) |
| 88 | continue |
| 89 | } |
| 90 | if _, matchesOwnerPort := portKeys[owner.portKey]; matchesOwnerPort { |
| 91 | filtered = append(filtered, segmentID) |
| 92 | } |
| 93 | } |
| 94 | if len(filtered) == 1 { |
| 95 | strictSegmentID = filtered[0] |
| 96 | } |
| 97 | if len(filtered) > 0 { |
| 98 | probableCandidates = filtered |
| 99 | } |
| 100 | } |
| 101 | b.probableCandidatesByEP[endpointID] = probableCandidates |
| 102 | |
| 103 | if strictSegmentID != "" { |
| 104 | b.allowEndpoint(strictSegmentID, endpointID, false, "") |
| 105 | b.strictLinkedEndpoints[endpointID] = struct{}{} |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | return endpointIDs |
| 110 | } |
| 111 | |
| 112 | func (b *segmentProjectionBuilder) selectManagedProbableHint(endpointID string) probableEndpointReporterHint { |
| 113 | hint := selectProbableEndpointReporterHint( |
| 114 | b.endpointLabelsByID[endpointID], |
| 115 | b.rawFDBReporterHints[normalizeFDBEndpointID(endpointID)], |
| 116 | b.fdbOwners[endpointID], |
| 117 | b.aliasOwnerIDs, |
| 118 | b.managedDeviceIDs, |
| 119 | ) |
| 120 | return ensureManagedProbableReporterHint( |
| 121 | hint, |
| 122 | b.endpointLabelsByID[endpointID], |
| 123 | b.rawFDBReporterHints[normalizeFDBEndpointID(endpointID)], |
| 124 | b.aliasOwnerIDs, |
| 125 | b.managedDeviceIDs, |
| 126 | b.managedDeviceIDList, |
| 127 | ) |
| 128 | } |
| 129 | |
| 130 | func (b *segmentProjectionBuilder) registerProbableSegment(endpointID string, hint probableEndpointReporterHint) string { |
| 131 | if strings.TrimSpace(hint.deviceID) == "" { |
| 132 | return "" |
| 133 | } |
| 134 | segmentID, created := ensureProbablePortlessSegment(b.segmentByID, hint) |
| 135 | if strings.TrimSpace(segmentID) == "" { |
| 136 | return "" |
| 137 | } |
| 138 | if created { |
| 139 | b.segmentIDs = append(b.segmentIDs, segmentID) |
| 140 | b.segmentIfIndexes[segmentID] = make(map[string]struct{}) |
| 141 | b.segmentIfNames[segmentID] = make(map[string]struct{}) |
| 142 | if hint.ifIndex > 0 { |
| 143 | b.segmentIfIndexes[segmentID][strconv.Itoa(hint.ifIndex)] = struct{}{} |
| 144 | } |
| 145 | if ifName := strings.ToLower(strings.TrimSpace(hint.ifName)); ifName != "" { |
| 146 | b.segmentIfNames[segmentID][ifName] = struct{}{} |
| 147 | } |
| 148 | match, actor := buildBridgeSegmentActor(segmentID, b.segmentByID[segmentID], b.layer, b.source) |
| 149 | keys := topologyMatchIdentityKeys(actor.Match) |
| 150 | if len(keys) > 0 && !topologyIdentityIndexOverlaps(b.actorIndex, keys) { |
| 151 | addTopologyIdentityKeys(b.actorIndex, keys) |
| 152 | } |
| 153 | b.out.actors = append(b.out.actors, actor) |
| 154 | b.segmentMatchByID[segmentID] = match |
| 155 | } |
| 156 | if seg := b.segmentByID[segmentID]; seg != nil { |
| 157 | seg.addEndpoint(endpointID, "probable") |
| 158 | } |
| 159 | return segmentID |
| 160 | } |
| 161 | |
| 162 | func (b *segmentProjectionBuilder) ensureProbableManagedSegment(endpointID string) string { |
| 163 | return b.registerProbableSegment(endpointID, b.selectManagedProbableHint(endpointID)) |
| 164 | } |
| 165 | |
| 166 | func (b *segmentProjectionBuilder) assignProbableEndpoints(endpointIDs []string) { |
| 167 | if b.probabilisticConnectivity { |
| 168 | for _, endpointID := range endpointIDs { |
| 169 | if _, strictLinked := b.strictLinkedEndpoints[endpointID]; strictLinked { |
| 170 | continue |
| 171 | } |
| 172 | |
| 173 | baseCandidates := b.baseCandidatesByEndpoint[endpointID] |
| 174 | probableCandidates := append([]string(nil), b.probableCandidatesByEP[endpointID]...) |
| 175 | if len(probableCandidates) == 0 { |
| 176 | probableCandidates = probableCandidateSegmentsFromReporterHints( |
| 177 | b.endpointLabelsByID[endpointID], |
| 178 | b.rawFDBObservations.byEndpoint[normalizeFDBEndpointID(endpointID)], |
| 179 | b.reporterSegmentIndex, |
| 180 | b.aliasOwnerIDs, |
| 181 | b.managedDeviceIDs, |
| 182 | ) |
| 183 | } |
| 184 | |
| 185 | segmentID := pickMostProbableSegment( |
| 186 | probableCandidates, |
| 187 | b.endpointLabelsByID[endpointID], |
| 188 | b.segmentIfIndexes, |
| 189 | b.segmentIfNames, |
| 190 | ) |
| 191 | if segmentID == "" && len(probableCandidates) > 0 { |
| 192 | segmentID = probableCandidates[0] |
| 193 | } |
| 194 | if segmentID != "" && !segmentHasManagedPort(b.segmentByID[segmentID], b.managedDeviceIDs) { |
| 195 | segmentID = b.ensureProbableManagedSegment(endpointID) |
| 196 | } |
| 197 | if segmentID == "" { |
| 198 | segmentID = b.ensureProbableManagedSegment(endpointID) |
| 199 | } |
| 200 | |
| 201 | if segmentID != "" { |
| 202 | probableMode := "probable_segment" |
| 203 | if strings.HasPrefix(segmentID, "bridge-domain:probable:") { |
| 204 | probableMode = "probable_portless" |
| 205 | } |
| 206 | b.allowEndpoint(segmentID, endpointID, true, probableMode) |
| 207 | if len(baseCandidates) > 1 { |
| 208 | b.out.endpointLinksSuppressed += len(baseCandidates) - 1 |
| 209 | } |
| 210 | continue |
| 211 | } |
| 212 | |
| 213 | if len(baseCandidates) > 1 { |
| 214 | b.out.endpointsWithAmbiguousSegment++ |
| 215 | b.out.endpointLinksSuppressed += len(baseCandidates) |
| 216 | } |
| 217 | } |
| 218 | return |
| 219 | } |
| 220 | |
| 221 | for _, endpointID := range endpointIDs { |
| 222 | if _, strictLinked := b.strictLinkedEndpoints[endpointID]; strictLinked { |
| 223 | continue |
| 224 | } |
| 225 | baseCandidates := b.baseCandidatesByEndpoint[endpointID] |
| 226 | if len(baseCandidates) > 1 { |
| 227 | b.out.endpointsWithAmbiguousSegment++ |
| 228 | b.out.endpointLinksSuppressed += len(baseCandidates) |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | func (b *segmentProjectionBuilder) assignRemainingProbableEndpoints(endpointIDs []string) { |
| 234 | if !b.probabilisticConnectivity || len(b.managedDeviceIDs) == 0 { |
| 235 | return |
| 236 | } |
| 237 | |
| 238 | for _, endpointID := range endpointIDs { |
| 239 | if _, alreadyAssigned := b.assignedEndpoints[endpointID]; alreadyAssigned { |
| 240 | continue |
| 241 | } |
| 242 | segmentID := b.ensureProbableManagedSegment(endpointID) |
| 243 | if strings.TrimSpace(segmentID) == "" { |
| 244 | continue |
| 245 | } |
| 246 | b.allowEndpoint(segmentID, endpointID, true, "probable_portless") |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | func (b *segmentProjectionBuilder) buildProbableOnlyAnchorPortIDBySegment() map[string]string { |
| 251 | out := make(map[string]string) |
| 252 | for _, segmentID := range b.segmentIDs { |
| 253 | if len(b.probableEndpointBySegment[segmentID]) == 0 { |
| 254 | continue |
| 255 | } |
| 256 | if len(b.strictEndpointBySegment[segmentID]) > 0 { |
| 257 | continue |
| 258 | } |
| 259 | segment := b.segmentByID[segmentID] |
| 260 | if segment == nil { |
| 261 | continue |
| 262 | } |
| 263 | if portID := pickProbableSegmentAnchorPortID(segment, b.probableEndpointBySegment[segmentID], b.fdbOwners, b.managedDeviceIDs); portID != "" { |
| 264 | out[segmentID] = portID |
| 265 | } |
| 266 | } |
| 267 | return out |
| 268 | } |