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state/nodestore: in memory representation of nodes

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Initial work on a nodestore which stores all of the nodes
and their relations in memory with relationship for peers
precalculated.

It is a copy-on-write structure, replacing the "snapshot"
when a change to the structure occurs. It is optimised for reads,
and while batches are not fast, they are grouped together
to do less of the expensive peer calculation if there are many
changes rapidly.

Writes will block until commited, while reads are never
blocked.

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby
2025-07-05 23:30:47 +02:00
committed by Kristoffer Dalby
parent 38be30b6d4
commit 9d236571f4
35 changed files with 3960 additions and 1317 deletions
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7
hscontrol/mapper/batcher.go
View File

@@ -1,6 +1,7 @@
package mapper
import (
"errors"
"fmt"
"time"
@@ -18,8 +19,8 @@ type batcherFunc func(cfg *types.Config, state *state.State) Batcher
type Batcher interface {
Start()
Close()
AddNode(id types.NodeID, c chan<- *tailcfg.MapResponse, isRouter bool, version tailcfg.CapabilityVersion) error
RemoveNode(id types.NodeID, c chan<- *tailcfg.MapResponse, isRouter bool)
AddNode(id types.NodeID, c chan<- *tailcfg.MapResponse, version tailcfg.CapabilityVersion) error
RemoveNode(id types.NodeID, c chan<- *tailcfg.MapResponse) bool
IsConnected(id types.NodeID) bool
ConnectedMap() *xsync.Map[types.NodeID, bool]
AddWork(c change.ChangeSet)
@@ -120,7 +121,7 @@ func generateMapResponse(nodeID types.NodeID, version tailcfg.CapabilityVersion,
// handleNodeChange generates and sends a [tailcfg.MapResponse] for a given node and [change.ChangeSet].
func handleNodeChange(nc nodeConnection, mapper *mapper, c change.ChangeSet) error {
if nc == nil {
return fmt.Errorf("nodeConnection is nil")
return errors.New("nodeConnection is nil")
}
nodeID := nc.nodeID()