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317 lines
10 KiB
317 lines
10 KiB
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package stream
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"runtime"
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"sync"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/simulations"
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"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
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"github.com/ethereum/go-ethereum/swarm/chunk"
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"github.com/ethereum/go-ethereum/swarm/network"
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"github.com/ethereum/go-ethereum/swarm/network/simulation"
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"github.com/ethereum/go-ethereum/swarm/pot"
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"github.com/ethereum/go-ethereum/swarm/state"
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"github.com/ethereum/go-ethereum/swarm/storage"
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"github.com/ethereum/go-ethereum/swarm/storage/mock"
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mockmem "github.com/ethereum/go-ethereum/swarm/storage/mock/mem"
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"github.com/ethereum/go-ethereum/swarm/testutil"
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)
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type synctestConfig struct {
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addrs [][]byte
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hashes []storage.Address
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idToChunksMap map[enode.ID][]int
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//chunksToNodesMap map[string][]int
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addrToIDMap map[string]enode.ID
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}
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const (
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// EventTypeNode is the type of event emitted when a node is either
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// created, started or stopped
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EventTypeChunkCreated simulations.EventType = "chunkCreated"
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EventTypeChunkOffered simulations.EventType = "chunkOffered"
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EventTypeChunkWanted simulations.EventType = "chunkWanted"
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EventTypeChunkDelivered simulations.EventType = "chunkDelivered"
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EventTypeChunkArrived simulations.EventType = "chunkArrived"
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EventTypeSimTerminated simulations.EventType = "simTerminated"
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)
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// Tests in this file should not request chunks from peers.
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// This function will panic indicating that there is a problem if request has been made.
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func dummyRequestFromPeers(_ context.Context, req *network.Request) (*enode.ID, chan struct{}, error) {
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panic(fmt.Sprintf("unexpected request: address %s, source %s", req.Addr.String(), req.Source.String()))
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}
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//This test is a syncing test for nodes.
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//One node is randomly selected to be the pivot node.
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//A configurable number of chunks and nodes can be
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//provided to the test, the number of chunks is uploaded
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//to the pivot node, and we check that nodes get the chunks
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//they are expected to store based on the syncing protocol.
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//Number of chunks and nodes can be provided via commandline too.
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func TestSyncingViaGlobalSync(t *testing.T) {
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if runtime.GOOS == "darwin" && os.Getenv("TRAVIS") == "true" {
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t.Skip("Flaky on mac on travis")
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}
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if testutil.RaceEnabled {
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t.Skip("Segfaults on Travis with -race")
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}
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//if nodes/chunks have been provided via commandline,
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//run the tests with these values
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if *nodes != 0 && *chunks != 0 {
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log.Info(fmt.Sprintf("Running test with %d chunks and %d nodes...", *chunks, *nodes))
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testSyncingViaGlobalSync(t, *chunks, *nodes)
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} else {
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chunkCounts := []int{4, 32}
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nodeCounts := []int{32, 16}
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//if the `longrunning` flag has been provided
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//run more test combinations
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if *longrunning {
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chunkCounts = []int{64, 128}
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nodeCounts = []int{32, 64}
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}
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for _, chunkCount := range chunkCounts {
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for _, n := range nodeCounts {
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log.Info(fmt.Sprintf("Long running test with %d chunks and %d nodes...", chunkCount, n))
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testSyncingViaGlobalSync(t, chunkCount, n)
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}
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}
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}
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}
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var simServiceMap = map[string]simulation.ServiceFunc{
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"streamer": func(ctx *adapters.ServiceContext, bucket *sync.Map) (s node.Service, cleanup func(), err error) {
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addr, netStore, delivery, clean, err := newNetStoreAndDeliveryWithRequestFunc(ctx, bucket, dummyRequestFromPeers)
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if err != nil {
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return nil, nil, err
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}
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store := state.NewInmemoryStore()
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r := NewRegistry(addr.ID(), delivery, netStore, store, &RegistryOptions{
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Syncing: SyncingAutoSubscribe,
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SyncUpdateDelay: 3 * time.Second,
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}, nil)
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bucket.Store(bucketKeyRegistry, r)
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cleanup = func() {
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r.Close()
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clean()
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}
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return r, cleanup, nil
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},
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}
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func testSyncingViaGlobalSync(t *testing.T, chunkCount int, nodeCount int) {
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sim := simulation.New(simServiceMap)
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defer sim.Close()
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log.Info("Initializing test config")
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conf := &synctestConfig{}
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//map of discover ID to indexes of chunks expected at that ID
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conf.idToChunksMap = make(map[enode.ID][]int)
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//map of overlay address to discover ID
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conf.addrToIDMap = make(map[string]enode.ID)
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//array where the generated chunk hashes will be stored
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conf.hashes = make([]storage.Address, 0)
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ctx, cancelSimRun := context.WithTimeout(context.Background(), 3*time.Minute)
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defer cancelSimRun()
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filename := fmt.Sprintf("testing/snapshot_%d.json", nodeCount)
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err := sim.UploadSnapshot(ctx, filename)
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if err != nil {
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t.Fatal(err)
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}
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result := runSim(conf, ctx, sim, chunkCount)
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if result.Error != nil {
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t.Fatal(result.Error)
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}
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log.Info("Simulation ended")
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}
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func runSim(conf *synctestConfig, ctx context.Context, sim *simulation.Simulation, chunkCount int) simulation.Result {
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return sim.Run(ctx, func(ctx context.Context, sim *simulation.Simulation) (err error) {
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disconnected := watchDisconnections(ctx, sim)
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defer func() {
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if err != nil && disconnected.bool() {
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err = errors.New("disconnect events received")
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}
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}()
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nodeIDs := sim.UpNodeIDs()
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for _, n := range nodeIDs {
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//get the kademlia overlay address from this ID
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a := n.Bytes()
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//append it to the array of all overlay addresses
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conf.addrs = append(conf.addrs, a)
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//the proximity calculation is on overlay addr,
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//the p2p/simulations check func triggers on enode.ID,
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//so we need to know which overlay addr maps to which nodeID
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conf.addrToIDMap[string(a)] = n
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}
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//get the node at that index
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//this is the node selected for upload
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node := sim.Net.GetRandomUpNode()
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item, ok := sim.NodeItem(node.ID(), bucketKeyStore)
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if !ok {
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return errors.New("no store in simulation bucket")
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}
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store := item.(chunk.Store)
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hashes, err := uploadFileToSingleNodeStore(node.ID(), chunkCount, store)
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if err != nil {
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return err
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}
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for _, h := range hashes {
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evt := &simulations.Event{
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Type: EventTypeChunkCreated,
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Node: sim.Net.GetNode(node.ID()),
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Data: h.String(),
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}
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sim.Net.Events().Send(evt)
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}
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conf.hashes = append(conf.hashes, hashes...)
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mapKeysToNodes(conf)
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// File retrieval check is repeated until all uploaded files are retrieved from all nodes
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// or until the timeout is reached.
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var globalStore mock.GlobalStorer
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if *useMockStore {
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globalStore = mockmem.NewGlobalStore()
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}
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REPEAT:
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for {
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for _, id := range nodeIDs {
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//for each expected chunk, check if it is in the local store
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localChunks := conf.idToChunksMap[id]
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for _, ch := range localChunks {
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//get the real chunk by the index in the index array
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ch := conf.hashes[ch]
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log.Trace("node has chunk", "address", ch)
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//check if the expected chunk is indeed in the localstore
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var err error
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if *useMockStore {
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//use the globalStore if the mockStore should be used; in that case,
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//the complete localStore stack is bypassed for getting the chunk
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_, err = globalStore.Get(common.BytesToAddress(id.Bytes()), ch)
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} else {
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//use the actual localstore
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item, ok := sim.NodeItem(id, bucketKeyStore)
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if !ok {
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return errors.New("no store in simulation bucket")
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}
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store := item.(chunk.Store)
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_, err = store.Get(ctx, chunk.ModeGetLookup, ch)
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}
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if err != nil {
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log.Debug("chunk not found", "address", ch.Hex(), "node", id)
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// Do not get crazy with logging the warn message
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time.Sleep(500 * time.Millisecond)
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continue REPEAT
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}
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evt := &simulations.Event{
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Type: EventTypeChunkArrived,
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Node: sim.Net.GetNode(id),
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Data: ch.String(),
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}
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sim.Net.Events().Send(evt)
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log.Trace("chunk found", "address", ch.Hex(), "node", id)
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}
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}
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return nil
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}
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})
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}
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//map chunk keys to addresses which are responsible
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func mapKeysToNodes(conf *synctestConfig) {
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nodemap := make(map[string][]int)
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//build a pot for chunk hashes
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np := pot.NewPot(nil, 0)
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indexmap := make(map[string]int)
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for i, a := range conf.addrs {
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indexmap[string(a)] = i
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np, _, _ = pot.Add(np, a, pof)
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}
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ppmap := network.NewPeerPotMap(network.NewKadParams().NeighbourhoodSize, conf.addrs)
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//for each address, run EachNeighbour on the chunk hashes pot to identify closest nodes
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log.Trace(fmt.Sprintf("Generated hash chunk(s): %v", conf.hashes))
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for i := 0; i < len(conf.hashes); i++ {
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var a []byte
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np.EachNeighbour([]byte(conf.hashes[i]), pof, func(val pot.Val, po int) bool {
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// take the first address
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a = val.([]byte)
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return false
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})
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nns := ppmap[common.Bytes2Hex(a)].NNSet
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nns = append(nns, a)
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for _, p := range nns {
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nodemap[string(p)] = append(nodemap[string(p)], i)
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}
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}
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for addr, chunks := range nodemap {
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//this selects which chunks are expected to be found with the given node
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conf.idToChunksMap[conf.addrToIDMap[addr]] = chunks
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}
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log.Debug(fmt.Sprintf("Map of expected chunks by ID: %v", conf.idToChunksMap))
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}
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//upload a file(chunks) to a single local node store
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func uploadFileToSingleNodeStore(id enode.ID, chunkCount int, store chunk.Store) ([]storage.Address, error) {
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log.Debug(fmt.Sprintf("Uploading to node id: %s", id))
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fileStore := storage.NewFileStore(store, storage.NewFileStoreParams(), chunk.NewTags())
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size := chunkSize
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var rootAddrs []storage.Address
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for i := 0; i < chunkCount; i++ {
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rk, wait, err := fileStore.Store(context.TODO(), testutil.RandomReader(i, size), int64(size), false)
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if err != nil {
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return nil, err
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}
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err = wait(context.TODO())
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if err != nil {
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return nil, err
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}
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rootAddrs = append(rootAddrs, (rk))
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}
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return rootAddrs, nil
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}
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