Merge pull request #6997 from onflow/petera/make-peer-cache-config

[Network] Make ProtocolPeerCache configurable

cmd/access/node_builder/access_node_builder.go

@@ -2362,6 +2362,7 @@ func (builder *FlowAccessNodeBuilder) initPublicLibp2pNode(networkKey crypto.Pri
 		&p2pbuilderconfig.UnicastConfig{
 			Unicast: builder.FlowConfig.NetworkConfig.Unicast,
 		}).
+		SetProtocolPeerCacheList(protocols.FlowProtocolID(builder.SporkID)).
 		SetBasicResolver(builder.Resolver).
 		SetSubscriptionFilter(networkingsubscription.NewRoleBasedFilter(flow.RoleAccess, builder.IdentityProvider)).
 		SetConnectionManager(connManager).

cmd/scaffold.go

@@ -568,6 +568,7 @@ func (fnb *FlowNodeBuilder) BuildPublicLibp2pNode(address string, bootstrapIdent
 		&p2pbuilderconfig.UnicastConfig{
 			Unicast: fnb.FlowConfig.NetworkConfig.Unicast,
 		}).
+		SetProtocolPeerCacheList(protocols.FlowProtocolID(fnb.SporkID)).
 		SetSubscriptionFilter(
 			subscription.NewRoleBasedFilter(
 				subscription.UnstakedRole, fnb.IdentityProvider,

network/p2p/builder.go

@@ -8,6 +8,7 @@ import (
 	"github.com/libp2p/go-libp2p/core/host"
 	"github.com/libp2p/go-libp2p/core/network"
 	"github.com/libp2p/go-libp2p/core/peer"
+	"github.com/libp2p/go-libp2p/core/protocol"
 	"github.com/libp2p/go-libp2p/core/routing"
 	madns "github.com/multiformats/go-multiaddr-dns"
 	"github.com/rs/zerolog"
@@ -206,7 +207,8 @@ type NodeConfig struct {
 	// logger used to provide logging
 	Logger zerolog.Logger `validate:"required"`
 	// reference to the libp2p host (https://godoc.org/github.com/libp2p/go-libp2p/core/host)
-	Host                 host.Host `validate:"required"`
-	PeerManager          PeerManager
-	DisallowListCacheCfg *DisallowListCacheConfig `validate:"required"`
+	Host                  host.Host `validate:"required"`
+	PeerManager           PeerManager
+	DisallowListCacheCfg  *DisallowListCacheConfig `validate:"required"`
+	ProtocolPeerCacheList []protocol.ID
 }

network/p2p/builder/libp2pNodeBuilder.go

@@ -13,6 +13,7 @@ import (
 	"github.com/libp2p/go-libp2p/core/connmgr"
 	"github.com/libp2p/go-libp2p/core/host"
 	"github.com/libp2p/go-libp2p/core/network"
+	"github.com/libp2p/go-libp2p/core/protocol"
 	"github.com/libp2p/go-libp2p/core/routing"
 	"github.com/libp2p/go-libp2p/core/transport"
 	rcmgr "github.com/libp2p/go-libp2p/p2p/host/resource-manager"
@@ -63,16 +64,17 @@ type LibP2PNodeBuilder struct {
 	metricsConfig    *p2pbuilderconfig.MetricsConfig
 	basicResolver    madns.BasicResolver
 
-	resourceManager      network.ResourceManager
-	resourceManagerCfg   *p2pconfig.ResourceManagerConfig
-	connManager          connmgr.ConnManager
-	connGater            p2p.ConnectionGater
-	routingFactory       func(context.Context, host.Host) (routing.Routing, error)
-	peerManagerConfig    *p2pbuilderconfig.PeerManagerConfig
-	createNode           p2p.NodeConstructor
-	disallowListCacheCfg *p2p.DisallowListCacheConfig
-	unicastConfig        *p2pbuilderconfig.UnicastConfig
-	networkingType       flownet.NetworkingType // whether the node is running in private (staked) or public (unstaked) network
+	resourceManager       network.ResourceManager
+	resourceManagerCfg    *p2pconfig.ResourceManagerConfig
+	connManager           connmgr.ConnManager
+	connGater             p2p.ConnectionGater
+	routingFactory        func(context.Context, host.Host) (routing.Routing, error)
+	peerManagerConfig     *p2pbuilderconfig.PeerManagerConfig
+	createNode            p2p.NodeConstructor
+	disallowListCacheCfg  *p2p.DisallowListCacheConfig
+	unicastConfig         *p2pbuilderconfig.UnicastConfig
+	networkingType        flownet.NetworkingType // whether the node is running in private (staked) or public (unstaked) network
+	protocolPeerCacheList []protocol.ID
 }
 
 func NewNodeBuilder(
@@ -155,6 +157,12 @@ func (builder *LibP2PNodeBuilder) OverrideDefaultValidateQueueSize(size int) p2p
 	return builder
 }
 
+// SetProtocolPeerCacheList sets the protocols to track in the protocol peer cache.
+func (builder *LibP2PNodeBuilder) SetProtocolPeerCacheList(protocols ...protocol.ID) p2p.NodeBuilder {
+	builder.protocolPeerCacheList = protocols
+	return builder
+}
+
 // OverrideGossipSubFactory overrides the default gossipsub factory for the GossipSub protocol.
 // The purpose of override is to allow the node to provide a custom gossipsub factory for sake of testing or experimentation.
 // Note: it is not recommended to override the default gossipsub factory in production unless you know what you are doing.
@@ -284,10 +292,11 @@ func (builder *LibP2PNodeBuilder) Build() (p2p.LibP2PNode, error) {
 		Parameters: &p2p.NodeParameters{
 			EnableProtectedStreams: builder.unicastConfig.EnableStreamProtection,
 		},
-		Logger:               builder.logger,
-		Host:                 h,
-		PeerManager:          peerManager,
-		DisallowListCacheCfg: builder.disallowListCacheCfg,
+		Logger:                builder.logger,
+		Host:                  h,
+		PeerManager:           peerManager,
+		DisallowListCacheCfg:  builder.disallowListCacheCfg,
+		ProtocolPeerCacheList: builder.protocolPeerCacheList,
 	})
 	if err != nil {
 		return nil, fmt.Errorf("could not create libp2p node: %w", err)

network/p2p/cache.go

@@ -18,8 +18,8 @@ type ProtocolPeerCache interface {
 	// RemoveProtocols removes the specified protocols for the given peer from the protocol cache.
 	RemoveProtocols(peerID peer.ID, protocols []protocol.ID)
 
-	// GetPeers returns a copy of the set of peers that support the given protocol.
-	GetPeers(pid protocol.ID) map[peer.ID]struct{}
+	// GetPeers returns the set of peers that support the given protocol.
+	GetPeers(pid protocol.ID) peer.IDSlice
 }
 
 // UpdateFunction is a function that adjusts the GossipSub spam record of a peer.

network/p2p/node/internal/protocolPeerCache.go

@@ -10,6 +10,7 @@ import (
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/libp2p/go-libp2p/core/protocol"
 	"github.com/rs/zerolog"
+	"golang.org/x/exp/maps"
 
 	p2plogging "github.com/onflow/flow-go/network/p2p/logging"
 )
@@ -20,13 +21,26 @@ type ProtocolPeerCache struct {
 	sync.RWMutex
 }
 
-func NewProtocolPeerCache(logger zerolog.Logger, h host.Host) (*ProtocolPeerCache, error) {
+// NewProtocolPeerCache creates a new ProtocolPeerCache instance using the given host and supported protocols
+// Only protocols passed in the protocols list will be tracked
+func NewProtocolPeerCache(logger zerolog.Logger, h host.Host, protocols []protocol.ID) (*ProtocolPeerCache, error) {
+	protocolPeers := make(map[protocol.ID]map[peer.ID]struct{})
+	for _, pid := range protocols {
+		protocolPeers[pid] = make(map[peer.ID]struct{})
+	}
+	p := &ProtocolPeerCache{protocolPeers: protocolPeers}
+
+	// If no protocols are passed, this is a noop cache
+	if len(protocols) == 0 {
+		return p, nil
+	}
+
 	sub, err := h.EventBus().
 		Subscribe([]interface{}{new(event.EvtPeerIdentificationCompleted), new(event.EvtPeerProtocolsUpdated)})
 	if err != nil {
 		return nil, fmt.Errorf("could not subscribe to peer protocol update events: %w", err)
 	}
-	p := &ProtocolPeerCache{protocolPeers: make(map[protocol.ID]map[peer.ID]struct{})}
+
 	h.Network().Notify(&libp2pnet.NotifyBundle{
 		DisconnectedF: func(n libp2pnet.Network, c libp2pnet.Conn) {
 			peer := c.RemotePeer()
@@ -43,49 +57,41 @@ func NewProtocolPeerCache(logger zerolog.Logger, h host.Host) (*ProtocolPeerCach
 func (p *ProtocolPeerCache) RemovePeer(peerID peer.ID) {
 	p.Lock()
 	defer p.Unlock()
-	for pid, peers := range p.protocolPeers {
+	for _, peers := range p.protocolPeers {
 		delete(peers, peerID)
-		if len(peers) == 0 {
-			delete(p.protocolPeers, pid)
-		}
 	}
 }
 
 func (p *ProtocolPeerCache) AddProtocols(peerID peer.ID, protocols []protocol.ID) {
 	p.Lock()
 	defer p.Unlock()
 	for _, pid := range protocols {
-		peers, ok := p.protocolPeers[pid]
-		if !ok {
-			peers = make(map[peer.ID]struct{})
-			p.protocolPeers[pid] = peers
+		if peers, ok := p.protocolPeers[pid]; ok {
+			peers[peerID] = struct{}{}
 		}
-		peers[peerID] = struct{}{}
 	}
 }
 
 func (p *ProtocolPeerCache) RemoveProtocols(peerID peer.ID, protocols []protocol.ID) {
 	p.Lock()
 	defer p.Unlock()
 	for _, pid := range protocols {
-		peers := p.protocolPeers[pid]
-		delete(peers, peerID)
-		if len(peers) == 0 {
-			delete(p.protocolPeers, pid)
+		if peers, ok := p.protocolPeers[pid]; ok {
+			delete(peers, peerID)
 		}
 	}
 }
 
-func (p *ProtocolPeerCache) GetPeers(pid protocol.ID) map[peer.ID]struct{} {
+func (p *ProtocolPeerCache) GetPeers(pid protocol.ID) peer.IDSlice {
 	p.RLock()
 	defer p.RUnlock()
 
-	// it is not safe to return a reference to the map, so we make a copy
-	peersCopy := make(map[peer.ID]struct{}, len(p.protocolPeers[pid]))
-	for peerID := range p.protocolPeers[pid] {
-		peersCopy[peerID] = struct{}{}
+	peers, ok := p.protocolPeers[pid]
+	if !ok {
+		return peer.IDSlice{}
 	}
-	return peersCopy
+
+	return maps.Keys(peers)
 }
 
 func (p *ProtocolPeerCache) consumeSubscription(logger zerolog.Logger, h host.Host, sub event.Subscription) {

network/p2p/node/internal/protocolPeerCache_test.go

@@ -2,6 +2,7 @@ package internal_test
 
 import (
 	"context"
+	"slices"
 	"testing"
 	"time"
 
@@ -22,20 +23,22 @@ func TestProtocolPeerCache(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
+	p1 := protocol.ID("p1")
+	p2 := protocol.ID("p2")
+	p3 := protocol.ID("p3")
+
 	// create three hosts, and a pcache for the first
+	// the cache supports all 3
 	h1, err := p2pbuilder.DefaultLibP2PHost(unittest.DefaultAddress, unittest.KeyFixture(crypto.ECDSASecp256k1))
 	require.NoError(t, err)
-	pcache, err := internal.NewProtocolPeerCache(zerolog.Nop(), h1)
+	pcache, err := internal.NewProtocolPeerCache(zerolog.Nop(), h1, []protocol.ID{p1, p2, p3})
 	require.NoError(t, err)
 	h2, err := p2pbuilder.DefaultLibP2PHost(unittest.DefaultAddress, unittest.KeyFixture(crypto.ECDSASecp256k1))
 	require.NoError(t, err)
 	h3, err := p2pbuilder.DefaultLibP2PHost(unittest.DefaultAddress, unittest.KeyFixture(crypto.ECDSASecp256k1))
 	require.NoError(t, err)
 
 	// register each host on a separate protocol
-	p1 := protocol.ID("p1")
-	p2 := protocol.ID("p2")
-	p3 := protocol.ID("p3")
 	noopHandler := func(s network.Stream) {}
 	h1.SetStreamHandler(p1, noopHandler)
 	h2.SetStreamHandler(p2, noopHandler)
@@ -50,8 +53,8 @@ func TestProtocolPeerCache(t *testing.T) {
 	assert.Eventually(t, func() bool {
 		peers2 := pcache.GetPeers(p2)
 		peers3 := pcache.GetPeers(p3)
-		_, ok2 := peers2[h2.ID()]
-		_, ok3 := peers3[h3.ID()]
+		ok2 := slices.Contains(peers2, h2.ID())
+		ok3 := slices.Contains(peers3, h3.ID())
 		return len(peers2) == 1 && len(peers3) == 1 && ok2 && ok3
 	}, 3*time.Second, 50*time.Millisecond)
 
@@ -64,15 +67,16 @@ func TestProtocolPeerCache(t *testing.T) {
 	}, 3*time.Second, 50*time.Millisecond)
 
 	// add support for p4 on h2 and h3
+	// note: pcache does NOT support p4 and should not cache it
 	p4 := protocol.ID("p4")
 	h2.SetStreamHandler(p4, noopHandler)
 	h3.SetStreamHandler(p4, noopHandler)
 
-	// check that h1's pcache reflects the change
-	assert.Eventually(t, func() bool {
+	// check that h1's pcache never contains p4
+	assert.Never(t, func() bool {
 		peers4 := pcache.GetPeers(p4)
-		_, ok2 := peers4[h2.ID()]
-		_, ok3 := peers4[h3.ID()]
+		ok2 := slices.Contains(peers4, h2.ID())
+		ok3 := slices.Contains(peers4, h3.ID())
 		return len(peers4) == 2 && ok2 && ok3
-	}, 3*time.Second, 50*time.Millisecond)
+	}, 1*time.Second, 50*time.Millisecond)
 }

network/p2p/node/libp2pNode.go

@@ -82,7 +82,7 @@ func NewNode(cfg *p2p.NodeConfig) (*Node, error) {
 		return nil, fmt.Errorf("invalid config: %w", err)
 	}
 
-	pCache, err := nodeinternal.NewProtocolPeerCache(cfg.Logger, cfg.Host)
+	pCache, err := nodeinternal.NewProtocolPeerCache(cfg.Logger, cfg.Host, cfg.ProtocolPeerCacheList)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create protocol peer cache: %w", err)
 	}
@@ -182,12 +182,7 @@ func (n *Node) RemovePeer(peerID peer.ID) error {
 
 // GetPeersForProtocol returns slice peer IDs for the specified protocol ID.
 func (n *Node) GetPeersForProtocol(pid protocol.ID) peer.IDSlice {
-	pMap := n.pCache.GetPeers(pid)
-	peers := make(peer.IDSlice, 0, len(pMap))
-	for p := range pMap {
-		peers = append(peers, p)
-	}
-	return peers
+	return n.pCache.GetPeers(pid)
 }
 
 // OpenAndWriteOnStream opens a new stream to a peer. The stream is opened to the given peerID