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// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"bytes"
"context"
"encoding/hex"
"fmt"
"io/ioutil"
"math/rand"
"os"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/swarm/chunk"
"github.com/ethereum/go-ethereum/swarm/storage"
"github.com/ethereum/go-ethereum/swarm/testutil"
cli "gopkg.in/urfave/cli.v1"
)
func uploadAndSyncCmd(ctx *cli.Context) error {
// use input seed if it has been set
if inputSeed != 0 {
seed = inputSeed
}
randomBytes := testutil.RandomBytes(seed, filesize*1000)
errc := make(chan error)
go func() {
errc <- uploadAndSync(ctx, randomBytes)
}()
var err error
select {
case err = <-errc:
if err != nil {
metrics.GetOrRegisterCounter(fmt.Sprintf("%s.fail", commandName), nil).Inc(1)
}
case <-time.After(time.Duration(timeout) * time.Second):
metrics.GetOrRegisterCounter(fmt.Sprintf("%s.timeout", commandName), nil).Inc(1)
err = fmt.Errorf("timeout after %v sec", timeout)
}
// trigger debug functionality on randomBytes
e := trackChunks(randomBytes[:], true)
if e != nil {
log.Error(e.Error())
}
return err
}
func trackChunks(testData []byte, submitMetrics bool) error {
addrs, err := getAllRefs(testData)
if err != nil {
return err
}
for i, ref := range addrs {
log.Debug(fmt.Sprintf("ref %d", i), "ref", ref)
}
var globalYes, globalNo int
var globalMu sync.Mutex
var hasErr bool
var wg sync.WaitGroup
wg.Add(len(hosts))
var mu sync.Mutex // mutex protecting the allHostsChunks and bzzAddrs maps
allHostChunks := map[string]string{} // host->bitvector of presence for chunks
bzzAddrs := map[string]string{} // host->bzzAddr
for _, host := range hosts {
host := host
go func() {
defer wg.Done()
httpHost := fmt.Sprintf("ws://%s:%d", host, 8546)
ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
defer cancel()
rpcClient, err := rpc.DialContext(ctx, httpHost)
if rpcClient != nil {
defer rpcClient.Close()
}
if err != nil {
log.Error("error dialing host", "err", err, "host", httpHost)
hasErr = true
return
}
hostChunks, err := getChunksBitVectorFromHost(rpcClient, addrs)
if err != nil {
log.Error("error getting chunks bit vector from host", "err", err, "host", httpHost)
hasErr = true
return
}
bzzAddr, err := getBzzAddrFromHost(rpcClient)
if err != nil {
log.Error("error getting bzz addrs from host", "err", err, "host", httpHost)
hasErr = true
return
}
mu.Lock()
allHostChunks[host] = hostChunks
bzzAddrs[host] = bzzAddr
mu.Unlock()
yes, no := 0, 0
for _, val := range hostChunks {
if val == '1' {
yes++
} else {
no++
}
}
if no == 0 {
log.Info("host reported to have all chunks", "host", host)
}
log.Debug("chunks", "chunks", hostChunks, "yes", yes, "no", no, "host", host)
if submitMetrics {
globalMu.Lock()
globalYes += yes
globalNo += no
globalMu.Unlock()
}
}()
}
wg.Wait()
checkChunksVsMostProxHosts(addrs, allHostChunks, bzzAddrs)
if !hasErr && submitMetrics {
// remove the chunks stored on the uploader node
globalYes -= len(addrs)
metrics.GetOrRegisterCounter("deployment.chunks.yes", nil).Inc(int64(globalYes))
metrics.GetOrRegisterCounter("deployment.chunks.no", nil).Inc(int64(globalNo))
metrics.GetOrRegisterCounter("deployment.chunks.refs", nil).Inc(int64(len(addrs)))
}
return nil
}
// getChunksBitVectorFromHost returns a bit vector of presence for a given slice of chunks from a given host
func getChunksBitVectorFromHost(client *rpc.Client, addrs []storage.Address) (string, error) {
var hostChunks string
err := client.Call(&hostChunks, "bzz_has", addrs)
if err != nil {
return "", err
}
return hostChunks, nil
}
// getBzzAddrFromHost returns the bzzAddr for a given host
func getBzzAddrFromHost(client *rpc.Client) (string, error) {
var hive string
err := client.Call(&hive, "bzz_hive")
if err != nil {
return "", err
}
// we make an ugly assumption about the output format of the hive.String() method
// ideally we should replace this with an API call that returns the bzz addr for a given host,
// but this also works for now (provided we don't change the hive.String() method, which we haven't in some time
ss := strings.Split(strings.Split(hive, "\n")[3], " ")
return ss[len(ss)-1], nil
}
// checkChunksVsMostProxHosts is checking:
// 1. whether a chunk has been found at less than 2 hosts. Considering our NN size, this should not happen.
// 2. if a chunk is not found at its closest node. This should also not happen.
// Together with the --only-upload flag, we could run this smoke test and make sure that our syncing
// functionality is correct (without even trying to retrieve the content).
//
// addrs - a slice with all uploaded chunk refs
// allHostChunks - host->bit vector, showing what chunks are present on what hosts
// bzzAddrs - host->bzz address, used when determining the most proximate host for a given chunk
func checkChunksVsMostProxHosts(addrs []storage.Address, allHostChunks map[string]string, bzzAddrs map[string]string) {
for k, v := range bzzAddrs {
log.Trace("bzzAddr", "bzz", v, "host", k)
}
for i := range addrs {
var foundAt int
maxProx := -1
var maxProxHost string
for host := range allHostChunks {
if allHostChunks[host][i] == '1' {
foundAt++
}
ba, err := hex.DecodeString(bzzAddrs[host])
if err != nil {
panic(err)
}
// calculate the host closest to any chunk
prox := chunk.Proximity(addrs[i], ba)
if prox > maxProx {
maxProx = prox
maxProxHost = host
}
}
if allHostChunks[maxProxHost][i] == '0' {
log.Error("chunk not found at max prox host", "ref", addrs[i], "host", maxProxHost, "bzzAddr", bzzAddrs[maxProxHost])
} else {
log.Trace("chunk present at max prox host", "ref", addrs[i], "host", maxProxHost, "bzzAddr", bzzAddrs[maxProxHost])
}
// if chunk found at less than 2 hosts
if foundAt < 2 {
log.Error("chunk found at less than two hosts", "foundAt", foundAt, "ref", addrs[i])
}
}
}
func getAllRefs(testData []byte) (storage.AddressCollection, error) {
datadir, err := ioutil.TempDir("", "chunk-debug")
if err != nil {
return nil, fmt.Errorf("unable to create temp dir: %v", err)
}
defer os.RemoveAll(datadir)
fileStore, err := storage.NewLocalFileStore(datadir, make([]byte, 32), chunk.NewTags())
if err != nil {
return nil, err
}
reader := bytes.NewReader(testData)
return fileStore.GetAllReferences(context.Background(), reader, false)
}
func uploadAndSync(c *cli.Context, randomBytes []byte) error {
log.Info("uploading to "+httpEndpoint(hosts[0])+" and syncing", "seed", seed)
t1 := time.Now()
hash, err := upload(randomBytes, httpEndpoint(hosts[0]))
if err != nil {
log.Error(err.Error())
return err
}
t2 := time.Since(t1)
metrics.GetOrRegisterResettingTimer("upload-and-sync.upload-time", nil).Update(t2)
fhash, err := digest(bytes.NewReader(randomBytes))
if err != nil {
log.Error(err.Error())
return err
}
log.Info("uploaded successfully", "hash", hash, "took", t2, "digest", fmt.Sprintf("%x", fhash))
// wait to sync and log chunks before fetch attempt, only if syncDelay is set to true
if syncDelay {
waitToSync()
log.Debug("chunks before fetch attempt", "hash", hash)
err = trackChunks(randomBytes, false)
if err != nil {
log.Error(err.Error())
}
}
if onlyUpload {
log.Debug("only-upload is true, stoppping test", "hash", hash)
return nil
}
randIndex := 1 + rand.Intn(len(hosts)-1)
for {
start := time.Now()
err := fetch(hash, httpEndpoint(hosts[randIndex]), fhash, "")
if err != nil {
time.Sleep(2 * time.Second)
continue
}
ended := time.Since(start)
metrics.GetOrRegisterResettingTimer("upload-and-sync.single.fetch-time", nil).Update(ended)
log.Info("fetch successful", "took", ended, "endpoint", httpEndpoint(hosts[randIndex]))
break
}
return nil
}
func isSyncing(wsHost string) (bool, error) {
rpcClient, err := rpc.Dial(wsHost)
if rpcClient != nil {
defer rpcClient.Close()
}
if err != nil {
log.Error("error dialing host", "err", err)
return false, err
}
var isSyncing bool
err = rpcClient.Call(&isSyncing, "bzz_isSyncing")
if err != nil {
log.Error("error calling host for isSyncing", "err", err)
return false, err
}
log.Debug("isSyncing result", "host", wsHost, "isSyncing", isSyncing)
return isSyncing, nil
}
func waitToSync() {
t1 := time.Now()
ns := uint64(1)
for ns > 0 {
time.Sleep(3 * time.Second)
notSynced := uint64(0)
var wg sync.WaitGroup
wg.Add(len(hosts))
for i := 0; i < len(hosts); i++ {
i := i
go func(idx int) {
stillSyncing, err := isSyncing(wsEndpoint(hosts[idx]))
if stillSyncing || err != nil {
atomic.AddUint64(¬Synced, 1)
}
wg.Done()
}(i)
}
wg.Wait()
ns = atomic.LoadUint64(¬Synced)
}
t2 := time.Since(t1)
metrics.GetOrRegisterResettingTimer("upload-and-sync.single.wait-for-sync.deployment", nil).Update(t2)
}
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