273 lines
7.3 KiB
Go
273 lines
7.3 KiB
Go
// 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 (
|
|
"errors"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/metrics"
|
|
"github.com/ethereum/go-ethereum/p2p/discover"
|
|
"github.com/ethereum/go-ethereum/swarm/log"
|
|
"github.com/ethereum/go-ethereum/swarm/network"
|
|
"github.com/ethereum/go-ethereum/swarm/storage"
|
|
)
|
|
|
|
const (
|
|
swarmChunkServerStreamName = "RETRIEVE_REQUEST"
|
|
deliveryCap = 32
|
|
)
|
|
|
|
var (
|
|
processReceivedChunksCount = metrics.NewRegisteredCounter("network.stream.received_chunks.count", nil)
|
|
handleRetrieveRequestMsgCount = metrics.NewRegisteredCounter("network.stream.handle_retrieve_request_msg.count", nil)
|
|
|
|
requestFromPeersCount = metrics.NewRegisteredCounter("network.stream.request_from_peers.count", nil)
|
|
requestFromPeersEachCount = metrics.NewRegisteredCounter("network.stream.request_from_peers_each.count", nil)
|
|
)
|
|
|
|
type Delivery struct {
|
|
db *storage.DBAPI
|
|
overlay network.Overlay
|
|
receiveC chan *ChunkDeliveryMsg
|
|
getPeer func(discover.NodeID) *Peer
|
|
}
|
|
|
|
func NewDelivery(overlay network.Overlay, db *storage.DBAPI) *Delivery {
|
|
d := &Delivery{
|
|
db: db,
|
|
overlay: overlay,
|
|
receiveC: make(chan *ChunkDeliveryMsg, deliveryCap),
|
|
}
|
|
|
|
go d.processReceivedChunks()
|
|
return d
|
|
}
|
|
|
|
// SwarmChunkServer implements Server
|
|
type SwarmChunkServer struct {
|
|
deliveryC chan []byte
|
|
batchC chan []byte
|
|
db *storage.DBAPI
|
|
currentLen uint64
|
|
quit chan struct{}
|
|
}
|
|
|
|
// NewSwarmChunkServer is SwarmChunkServer constructor
|
|
func NewSwarmChunkServer(db *storage.DBAPI) *SwarmChunkServer {
|
|
s := &SwarmChunkServer{
|
|
deliveryC: make(chan []byte, deliveryCap),
|
|
batchC: make(chan []byte),
|
|
db: db,
|
|
quit: make(chan struct{}),
|
|
}
|
|
go s.processDeliveries()
|
|
return s
|
|
}
|
|
|
|
// processDeliveries handles delivered chunk hashes
|
|
func (s *SwarmChunkServer) processDeliveries() {
|
|
var hashes []byte
|
|
var batchC chan []byte
|
|
for {
|
|
select {
|
|
case <-s.quit:
|
|
return
|
|
case hash := <-s.deliveryC:
|
|
hashes = append(hashes, hash...)
|
|
batchC = s.batchC
|
|
case batchC <- hashes:
|
|
hashes = nil
|
|
batchC = nil
|
|
}
|
|
}
|
|
}
|
|
|
|
// SetNextBatch
|
|
func (s *SwarmChunkServer) SetNextBatch(_, _ uint64) (hashes []byte, from uint64, to uint64, proof *HandoverProof, err error) {
|
|
select {
|
|
case hashes = <-s.batchC:
|
|
case <-s.quit:
|
|
return
|
|
}
|
|
|
|
from = s.currentLen
|
|
s.currentLen += uint64(len(hashes))
|
|
to = s.currentLen
|
|
return
|
|
}
|
|
|
|
// Close needs to be called on a stream server
|
|
func (s *SwarmChunkServer) Close() {
|
|
close(s.quit)
|
|
}
|
|
|
|
// GetData retrives chunk data from db store
|
|
func (s *SwarmChunkServer) GetData(key []byte) ([]byte, error) {
|
|
chunk, err := s.db.Get(storage.Address(key))
|
|
if err == storage.ErrFetching {
|
|
<-chunk.ReqC
|
|
} else if err != nil {
|
|
return nil, err
|
|
}
|
|
return chunk.SData, nil
|
|
}
|
|
|
|
// RetrieveRequestMsg is the protocol msg for chunk retrieve requests
|
|
type RetrieveRequestMsg struct {
|
|
Addr storage.Address
|
|
SkipCheck bool
|
|
}
|
|
|
|
func (d *Delivery) handleRetrieveRequestMsg(sp *Peer, req *RetrieveRequestMsg) error {
|
|
log.Trace("received request", "peer", sp.ID(), "hash", req.Addr)
|
|
handleRetrieveRequestMsgCount.Inc(1)
|
|
|
|
s, err := sp.getServer(NewStream(swarmChunkServerStreamName, "", false))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
streamer := s.Server.(*SwarmChunkServer)
|
|
chunk, created := d.db.GetOrCreateRequest(req.Addr)
|
|
if chunk.ReqC != nil {
|
|
if created {
|
|
if err := d.RequestFromPeers(chunk.Addr[:], true, sp.ID()); err != nil {
|
|
log.Warn("unable to forward chunk request", "peer", sp.ID(), "key", chunk.Addr, "err", err)
|
|
chunk.SetErrored(storage.ErrChunkForward)
|
|
return nil
|
|
}
|
|
}
|
|
go func() {
|
|
t := time.NewTimer(10 * time.Minute)
|
|
defer t.Stop()
|
|
|
|
log.Debug("waiting delivery", "peer", sp.ID(), "hash", req.Addr, "node", common.Bytes2Hex(d.overlay.BaseAddr()), "created", created)
|
|
start := time.Now()
|
|
select {
|
|
case <-chunk.ReqC:
|
|
log.Debug("retrieve request ReqC closed", "peer", sp.ID(), "hash", req.Addr, "time", time.Since(start))
|
|
case <-t.C:
|
|
log.Debug("retrieve request timeout", "peer", sp.ID(), "hash", req.Addr)
|
|
chunk.SetErrored(storage.ErrChunkTimeout)
|
|
return
|
|
}
|
|
chunk.SetErrored(nil)
|
|
|
|
if req.SkipCheck {
|
|
err := sp.Deliver(chunk, s.priority)
|
|
if err != nil {
|
|
log.Warn("ERROR in handleRetrieveRequestMsg, DROPPING peer!", "err", err)
|
|
sp.Drop(err)
|
|
}
|
|
}
|
|
streamer.deliveryC <- chunk.Addr[:]
|
|
}()
|
|
return nil
|
|
}
|
|
// TODO: call the retrieve function of the outgoing syncer
|
|
if req.SkipCheck {
|
|
log.Trace("deliver", "peer", sp.ID(), "hash", chunk.Addr)
|
|
if length := len(chunk.SData); length < 9 {
|
|
log.Error("Chunk.SData to deliver is too short", "len(chunk.SData)", length, "address", chunk.Addr)
|
|
}
|
|
return sp.Deliver(chunk, s.priority)
|
|
}
|
|
streamer.deliveryC <- chunk.Addr[:]
|
|
return nil
|
|
}
|
|
|
|
type ChunkDeliveryMsg struct {
|
|
Addr storage.Address
|
|
SData []byte // the stored chunk Data (incl size)
|
|
peer *Peer // set in handleChunkDeliveryMsg
|
|
}
|
|
|
|
func (d *Delivery) handleChunkDeliveryMsg(sp *Peer, req *ChunkDeliveryMsg) error {
|
|
req.peer = sp
|
|
d.receiveC <- req
|
|
return nil
|
|
}
|
|
|
|
func (d *Delivery) processReceivedChunks() {
|
|
R:
|
|
for req := range d.receiveC {
|
|
processReceivedChunksCount.Inc(1)
|
|
|
|
// this should be has locally
|
|
chunk, err := d.db.Get(req.Addr)
|
|
if err == nil {
|
|
continue R
|
|
}
|
|
if err != storage.ErrFetching {
|
|
log.Error("processReceivedChunks db error", "addr", req.Addr, "err", err, "chunk", chunk)
|
|
continue R
|
|
}
|
|
select {
|
|
case <-chunk.ReqC:
|
|
log.Error("someone else delivered?", "hash", chunk.Addr.Hex())
|
|
continue R
|
|
default:
|
|
}
|
|
chunk.SData = req.SData
|
|
d.db.Put(chunk)
|
|
|
|
go func(req *ChunkDeliveryMsg) {
|
|
err := chunk.WaitToStore()
|
|
if err == storage.ErrChunkInvalid {
|
|
req.peer.Drop(err)
|
|
}
|
|
}(req)
|
|
}
|
|
}
|
|
|
|
// RequestFromPeers sends a chunk retrieve request to
|
|
func (d *Delivery) RequestFromPeers(hash []byte, skipCheck bool, peersToSkip ...discover.NodeID) error {
|
|
var success bool
|
|
var err error
|
|
requestFromPeersCount.Inc(1)
|
|
d.overlay.EachConn(hash, 255, func(p network.OverlayConn, po int, nn bool) bool {
|
|
spId := p.(network.Peer).ID()
|
|
for _, p := range peersToSkip {
|
|
if p == spId {
|
|
log.Trace("Delivery.RequestFromPeers: skip peer", "peer", spId)
|
|
return true
|
|
}
|
|
}
|
|
sp := d.getPeer(spId)
|
|
if sp == nil {
|
|
log.Warn("Delivery.RequestFromPeers: peer not found", "id", spId)
|
|
return true
|
|
}
|
|
// TODO: skip light nodes that do not accept retrieve requests
|
|
err = sp.SendPriority(&RetrieveRequestMsg{
|
|
Addr: hash,
|
|
SkipCheck: skipCheck,
|
|
}, Top)
|
|
if err != nil {
|
|
return true
|
|
}
|
|
requestFromPeersEachCount.Inc(1)
|
|
success = true
|
|
return false
|
|
})
|
|
if success {
|
|
return nil
|
|
}
|
|
return errors.New("no peer found")
|
|
}
|