Official Go implementation of the Ethereum protocol
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go-ethereum/swarm/network/stream/delivery_test.go

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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package stream
import (
"bytes"
"context"
crand "crypto/rand"
"fmt"
"io"
"os"
"sync"
"testing"
"time"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
"github.com/ethereum/go-ethereum/swarm/log"
"github.com/ethereum/go-ethereum/swarm/network"
"github.com/ethereum/go-ethereum/swarm/network/simulation"
"github.com/ethereum/go-ethereum/swarm/state"
"github.com/ethereum/go-ethereum/swarm/storage"
)
func TestStreamerRetrieveRequest(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(t)
defer teardown()
if err != nil {
t.Fatal(err)
}
peerID := tester.IDs[0]
ctx := context.Background()
req := network.NewRequest(
storage.Address(hash0[:]),
true,
&sync.Map{},
)
streamer.delivery.RequestFromPeers(ctx, req)
err = tester.TestExchanges(p2ptest.Exchange{
Label: "RetrieveRequestMsg",
Expects: []p2ptest.Expect{
{
Code: 5,
Msg: &RetrieveRequestMsg{
Addr: hash0[:],
SkipCheck: true,
},
Peer: peerID,
},
},
})
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
}
func TestStreamerUpstreamRetrieveRequestMsgExchangeWithoutStore(t *testing.T) {
tester, streamer, _, teardown, err := newStreamerTester(t)
defer teardown()
if err != nil {
t.Fatal(err)
}
peerID := tester.IDs[0]
chunk := storage.NewChunk(storage.Address(hash0[:]), nil)
peer := streamer.getPeer(peerID)
peer.handleSubscribeMsg(context.TODO(), &SubscribeMsg{
Stream: NewStream(swarmChunkServerStreamName, "", false),
History: nil,
Priority: Top,
})
err = tester.TestExchanges(p2ptest.Exchange{
Label: "RetrieveRequestMsg",
Triggers: []p2ptest.Trigger{
{
Code: 5,
Msg: &RetrieveRequestMsg{
Addr: chunk.Address()[:],
},
Peer: peerID,
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
HandoverProof: nil,
Hashes: nil,
From: 0,
To: 0,
},
Peer: peerID,
},
},
})
expectedError := `exchange #0 "RetrieveRequestMsg": timed out`
if err == nil || err.Error() != expectedError {
t.Fatalf("Expected error %v, got %v", expectedError, err)
}
}
// upstream request server receives a retrieve Request and responds with
// offered hashes or delivery if skipHash is set to true
func TestStreamerUpstreamRetrieveRequestMsgExchange(t *testing.T) {
tester, streamer, localStore, teardown, err := newStreamerTester(t)
defer teardown()
if err != nil {
t.Fatal(err)
}
peerID := tester.IDs[0]
peer := streamer.getPeer(peerID)
stream := NewStream(swarmChunkServerStreamName, "", false)
peer.handleSubscribeMsg(context.TODO(), &SubscribeMsg{
Stream: stream,
History: nil,
Priority: Top,
})
hash := storage.Address(hash0[:])
chunk := storage.NewChunk(hash, hash)
err = localStore.Put(context.TODO(), chunk)
if err != nil {
t.Fatalf("Expected no err got %v", err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "RetrieveRequestMsg",
Triggers: []p2ptest.Trigger{
{
Code: 5,
Msg: &RetrieveRequestMsg{
Addr: hash,
},
Peer: peerID,
},
},
Expects: []p2ptest.Expect{
{
Code: 1,
Msg: &OfferedHashesMsg{
HandoverProof: &HandoverProof{
Handover: &Handover{},
},
Hashes: hash,
From: 0,
// TODO: why is this 32???
To: 32,
Stream: stream,
},
Peer: peerID,
},
},
})
if err != nil {
t.Fatal(err)
}
hash = storage.Address(hash1[:])
chunk = storage.NewChunk(hash, hash1[:])
err = localStore.Put(context.TODO(), chunk)
if err != nil {
t.Fatalf("Expected no err got %v", err)
}
err = tester.TestExchanges(p2ptest.Exchange{
Label: "RetrieveRequestMsg",
Triggers: []p2ptest.Trigger{
{
Code: 5,
Msg: &RetrieveRequestMsg{
Addr: hash,
SkipCheck: true,
},
Peer: peerID,
},
},
Expects: []p2ptest.Expect{
{
Code: 6,
Msg: &ChunkDeliveryMsg{
Addr: hash,
SData: hash,
},
Peer: peerID,
},
},
})
if err != nil {
t.Fatal(err)
}
}
func TestStreamerDownstreamChunkDeliveryMsgExchange(t *testing.T) {
tester, streamer, localStore, teardown, err := newStreamerTester(t)
defer teardown()
if err != nil {
t.Fatal(err)
}
streamer.RegisterClientFunc("foo", func(p *Peer, t string, live bool) (Client, error) {
return &testClient{
t: t,
}, nil
})
peerID := tester.IDs[0]
stream := NewStream("foo", "", true)
err = streamer.Subscribe(peerID, stream, NewRange(5, 8), Top)
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
chunkKey := hash0[:]
chunkData := hash1[:]
err = tester.TestExchanges(p2ptest.Exchange{
Label: "Subscribe message",
Expects: []p2ptest.Expect{
{
Code: 4,
Msg: &SubscribeMsg{
Stream: stream,
History: NewRange(5, 8),
Priority: Top,
},
Peer: peerID,
},
},
},
p2ptest.Exchange{
Label: "ChunkDelivery message",
Triggers: []p2ptest.Trigger{
{
Code: 6,
Msg: &ChunkDeliveryMsg{
Addr: chunkKey,
SData: chunkData,
},
Peer: peerID,
},
},
})
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
// wait for the chunk to get stored
storedChunk, err := localStore.Get(ctx, chunkKey)
for err != nil {
select {
case <-ctx.Done():
t.Fatalf("Chunk is not in localstore after timeout, err: %v", err)
default:
}
storedChunk, err = localStore.Get(ctx, chunkKey)
time.Sleep(50 * time.Millisecond)
}
if err != nil {
t.Fatalf("Expected no error, got %v", err)
}
if !bytes.Equal(storedChunk.Data(), chunkData) {
t.Fatal("Retrieved chunk has different data than original")
}
}
func TestDeliveryFromNodes(t *testing.T) {
testDeliveryFromNodes(t, 2, 1, dataChunkCount, true)
testDeliveryFromNodes(t, 2, 1, dataChunkCount, false)
testDeliveryFromNodes(t, 4, 1, dataChunkCount, true)
testDeliveryFromNodes(t, 4, 1, dataChunkCount, false)
testDeliveryFromNodes(t, 8, 1, dataChunkCount, true)
testDeliveryFromNodes(t, 8, 1, dataChunkCount, false)
testDeliveryFromNodes(t, 16, 1, dataChunkCount, true)
testDeliveryFromNodes(t, 16, 1, dataChunkCount, false)
}
func testDeliveryFromNodes(t *testing.T, nodes, conns, chunkCount int, skipCheck bool) {
sim := simulation.New(map[string]simulation.ServiceFunc{
"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
id := ctx.Config.ID
addr := network.NewAddrFromNodeID(id)
store, datadir, err := createTestLocalStorageForID(id, addr)
if err != nil {
return nil, nil, err
}
bucket.Store(bucketKeyStore, store)
cleanup = func() {
os.RemoveAll(datadir)
store.Close()
}
localStore := store.(*storage.LocalStore)
netStore, err := storage.NewNetStore(localStore, nil)
if err != nil {
return nil, nil, err
}
kad := network.NewKademlia(addr.Over(), network.NewKadParams())
delivery := NewDelivery(kad, netStore)
netStore.NewNetFetcherFunc = network.NewFetcherFactory(delivery.RequestFromPeers, true).New
r := NewRegistry(addr, delivery, netStore, state.NewInmemoryStore(), &RegistryOptions{
SkipCheck: skipCheck,
})
bucket.Store(bucketKeyRegistry, r)
fileStore := storage.NewFileStore(netStore, storage.NewFileStoreParams())
bucket.Store(bucketKeyFileStore, fileStore)
return r, cleanup, nil
},
})
defer sim.Close()
log.Info("Adding nodes to simulation")
_, err := sim.AddNodesAndConnectChain(nodes)
if err != nil {
t.Fatal(err)
}
log.Info("Starting simulation")
ctx := context.Background()
result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
nodeIDs := sim.UpNodeIDs()
//determine the pivot node to be the first node of the simulation
sim.SetPivotNode(nodeIDs[0])
//distribute chunks of a random file into Stores of nodes 1 to nodes
//we will do this by creating a file store with an underlying round-robin store:
//the file store will create a hash for the uploaded file, but every chunk will be
//distributed to different nodes via round-robin scheduling
log.Debug("Writing file to round-robin file store")
//to do this, we create an array for chunkstores (length minus one, the pivot node)
stores := make([]storage.ChunkStore, len(nodeIDs)-1)
//we then need to get all stores from the sim....
lStores := sim.NodesItems(bucketKeyStore)
i := 0
//...iterate the buckets...
for id, bucketVal := range lStores {
//...and remove the one which is the pivot node
if id == *sim.PivotNodeID() {
continue
}
//the other ones are added to the array...
stores[i] = bucketVal.(storage.ChunkStore)
i++
}
//...which then gets passed to the round-robin file store
roundRobinFileStore := storage.NewFileStore(newRoundRobinStore(stores...), storage.NewFileStoreParams())
//now we can actually upload a (random) file to the round-robin store
size := chunkCount * chunkSize
log.Debug("Storing data to file store")
fileHash, wait, err := roundRobinFileStore.Store(ctx, io.LimitReader(crand.Reader, int64(size)), int64(size), false)
// wait until all chunks stored
if err != nil {
return err
}
err = wait(ctx)
if err != nil {
return err
}
log.Debug("Waiting for kademlia")
if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
return err
}
//each of the nodes (except pivot node) subscribes to the stream of the next node
for j, node := range nodeIDs[0 : nodes-1] {
sid := nodeIDs[j+1]
item, ok := sim.NodeItem(node, bucketKeyRegistry)
if !ok {
return fmt.Errorf("No registry")
}
registry := item.(*Registry)
err = registry.Subscribe(sid, NewStream(swarmChunkServerStreamName, "", false), NewRange(0, 0), Top)
if err != nil {
return err
}
}
//get the pivot node's filestore
item, ok := sim.NodeItem(*sim.PivotNodeID(), bucketKeyFileStore)
if !ok {
return fmt.Errorf("No filestore")
}
pivotFileStore := item.(*storage.FileStore)
log.Debug("Starting retrieval routine")
go func() {
// start the retrieval on the pivot node - this will spawn retrieve requests for missing chunks
// we must wait for the peer connections to have started before requesting
n, err := readAll(pivotFileStore, fileHash)
log.Info(fmt.Sprintf("retrieved %v", fileHash), "read", n, "err", err)
if err != nil {
t.Fatalf("requesting chunks action error: %v", err)
}
}()
log.Debug("Watching for disconnections")
disconnections := sim.PeerEvents(
context.Background(),
sim.NodeIDs(),
simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
)
go func() {
for d := range disconnections {
if d.Error != nil {
log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
t.Fatal(d.Error)
}
}
}()
//finally check that the pivot node gets all chunks via the root hash
log.Debug("Check retrieval")
success := true
var total int64
total, err = readAll(pivotFileStore, fileHash)
if err != nil {
return err
}
log.Info(fmt.Sprintf("check if %08x is available locally: number of bytes read %v/%v (error: %v)", fileHash, total, size, err))
if err != nil || total != int64(size) {
success = false
}
if !success {
return fmt.Errorf("Test failed, chunks not available on all nodes")
}
log.Debug("Test terminated successfully")
return nil
})
if result.Error != nil {
t.Fatal(result.Error)
}
}
func BenchmarkDeliveryFromNodesWithoutCheck(b *testing.B) {
for chunks := 32; chunks <= 128; chunks *= 2 {
for i := 2; i < 32; i *= 2 {
b.Run(
fmt.Sprintf("nodes=%v,chunks=%v", i, chunks),
func(b *testing.B) {
benchmarkDeliveryFromNodes(b, i, 1, chunks, true)
},
)
}
}
}
func BenchmarkDeliveryFromNodesWithCheck(b *testing.B) {
for chunks := 32; chunks <= 128; chunks *= 2 {
for i := 2; i < 32; i *= 2 {
b.Run(
fmt.Sprintf("nodes=%v,chunks=%v", i, chunks),
func(b *testing.B) {
benchmarkDeliveryFromNodes(b, i, 1, chunks, false)
},
)
}
}
}
func benchmarkDeliveryFromNodes(b *testing.B, nodes, conns, chunkCount int, skipCheck bool) {
sim := simulation.New(map[string]simulation.ServiceFunc{
"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
id := ctx.Config.ID
addr := network.NewAddrFromNodeID(id)
store, datadir, err := createTestLocalStorageForID(id, addr)
if err != nil {
return nil, nil, err
}
bucket.Store(bucketKeyStore, store)
cleanup = func() {
os.RemoveAll(datadir)
store.Close()
}
localStore := store.(*storage.LocalStore)
netStore, err := storage.NewNetStore(localStore, nil)
if err != nil {
return nil, nil, err
}
kad := network.NewKademlia(addr.Over(), network.NewKadParams())
delivery := NewDelivery(kad, netStore)
netStore.NewNetFetcherFunc = network.NewFetcherFactory(delivery.RequestFromPeers, true).New
r := NewRegistry(addr, delivery, netStore, state.NewInmemoryStore(), &RegistryOptions{
SkipCheck: skipCheck,
DoSync: true,
SyncUpdateDelay: 0,
})
fileStore := storage.NewFileStore(netStore, storage.NewFileStoreParams())
bucket.Store(bucketKeyFileStore, fileStore)
return r, cleanup, nil
},
})
defer sim.Close()
log.Info("Initializing test config")
_, err := sim.AddNodesAndConnectChain(nodes)
if err != nil {
b.Fatal(err)
}
ctx := context.Background()
result := sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) error {
nodeIDs := sim.UpNodeIDs()
node := nodeIDs[len(nodeIDs)-1]
item, ok := sim.NodeItem(node, bucketKeyFileStore)
if !ok {
b.Fatal("No filestore")
}
remoteFileStore := item.(*storage.FileStore)
pivotNode := nodeIDs[0]
item, ok = sim.NodeItem(pivotNode, bucketKeyNetStore)
if !ok {
b.Fatal("No filestore")
}
netStore := item.(*storage.NetStore)
if _, err := sim.WaitTillHealthy(ctx, 2); err != nil {
return err
}
disconnections := sim.PeerEvents(
context.Background(),
sim.NodeIDs(),
simulation.NewPeerEventsFilter().Type(p2p.PeerEventTypeDrop),
)
go func() {
for d := range disconnections {
if d.Error != nil {
log.Error("peer drop", "node", d.NodeID, "peer", d.Event.Peer)
b.Fatal(d.Error)
}
}
}()
// benchmark loop
b.ResetTimer()
b.StopTimer()
Loop:
for i := 0; i < b.N; i++ {
// uploading chunkCount random chunks to the last node
hashes := make([]storage.Address, chunkCount)
for i := 0; i < chunkCount; i++ {
// create actual size real chunks
ctx := context.TODO()
hash, wait, err := remoteFileStore.Store(ctx, io.LimitReader(crand.Reader, int64(chunkSize)), int64(chunkSize), false)
if err != nil {
b.Fatalf("expected no error. got %v", err)
}
// wait until all chunks stored
err = wait(ctx)
if err != nil {
b.Fatalf("expected no error. got %v", err)
}
// collect the hashes
hashes[i] = hash
}
// now benchmark the actual retrieval
// netstore.Get is called for each hash in a go routine and errors are collected
b.StartTimer()
errs := make(chan error)
for _, hash := range hashes {
go func(h storage.Address) {
_, err := netStore.Get(ctx, h)
log.Warn("test check netstore get", "hash", h, "err", err)
errs <- err
}(hash)
}
// count and report retrieval errors
// if there are misses then chunk timeout is too low for the distance and volume (?)
var total, misses int
for err := range errs {
if err != nil {
log.Warn(err.Error())
misses++
}
total++
if total == chunkCount {
break
}
}
b.StopTimer()
if misses > 0 {
err = fmt.Errorf("%v chunk not found out of %v", misses, total)
break Loop
}
}
if err != nil {
b.Fatal(err)
}
return nil
})
if result.Error != nil {
b.Fatal(result.Error)
}
}