diff options
| -rw-r--r-- | pkg/tcpip/stack/neighbor_cache.go | 9 | ||||
| -rw-r--r-- | pkg/tcpip/stack/neighbor_entry.go | 5 | ||||
| -rw-r--r-- | pkg/tcpip/stack/nic.go | 4 |
3 files changed, 14 insertions, 4 deletions
diff --git a/pkg/tcpip/stack/neighbor_cache.go b/pkg/tcpip/stack/neighbor_cache.go index 177bf5516..13ea2d1d9 100644 --- a/pkg/tcpip/stack/neighbor_cache.go +++ b/pkg/tcpip/stack/neighbor_cache.go @@ -24,9 +24,16 @@ import ( const neighborCacheSize = 512 // max entries per interface +// NeighborStats holds metrics for the neighbor table. +type NeighborStats struct { + // FailedEntryLookups counts the number of lookups performed on an entry in + // Failed state. + FailedEntryLookups *tcpip.StatCounter +} + // neighborCache maps IP addresses to link addresses. It uses the Least // Recently Used (LRU) eviction strategy to implement a bounded cache for -// dynmically acquired entries. It contains the state machine and configuration +// dynamically acquired entries. It contains the state machine and configuration // for running Neighbor Unreachability Detection (NUD). // // There are two types of entries in the neighbor cache: diff --git a/pkg/tcpip/stack/neighbor_entry.go b/pkg/tcpip/stack/neighbor_entry.go index 493e48031..65fbd0ac3 100644 --- a/pkg/tcpip/stack/neighbor_entry.go +++ b/pkg/tcpip/stack/neighbor_entry.go @@ -347,9 +347,10 @@ func (e *neighborEntry) handlePacketQueuedLocked(localAddr tcpip.Address) { e.setStateLocked(Delay) e.dispatchChangeEventLocked() - case Incomplete, Reachable, Delay, Probe, Static, Failed: + case Incomplete, Reachable, Delay, Probe, Static: // Do nothing - + case Failed: + e.nic.stats.Neighbor.FailedEntryLookups.Increment() default: panic(fmt.Sprintf("Invalid cache entry state: %s", e.neigh.State)) } diff --git a/pkg/tcpip/stack/nic.go b/pkg/tcpip/stack/nic.go index 3e6ceff28..43696ba14 100644 --- a/pkg/tcpip/stack/nic.go +++ b/pkg/tcpip/stack/nic.go @@ -60,12 +60,14 @@ type NIC struct { } } -// NICStats includes transmitted and received stats. +// NICStats hold statistics for a NIC. type NICStats struct { Tx DirectionStats Rx DirectionStats DisabledRx DirectionStats + + Neighbor NeighborStats } func makeNICStats() NICStats { |