735 lines
22 KiB
Go
735 lines
22 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package peer
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import (
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"context"
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"fmt"
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"io"
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"runtime/debug"
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"sync"
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"sync/atomic"
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"time"
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"github.com/pkg/errors"
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"go.opentelemetry.io/otel/trace"
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"golang.org/x/time/rate"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"d7y.io/dragonfly/v2/client/clientutil"
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"d7y.io/dragonfly/v2/client/config"
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"d7y.io/dragonfly/v2/pkg/dfcodes"
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"d7y.io/dragonfly/v2/pkg/dferrors"
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logger "d7y.io/dragonfly/v2/pkg/dflog"
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"d7y.io/dragonfly/v2/pkg/rpc/base"
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dfclient "d7y.io/dragonfly/v2/pkg/rpc/dfdaemon/client"
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"d7y.io/dragonfly/v2/pkg/rpc/scheduler"
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schedulerclient "d7y.io/dragonfly/v2/pkg/rpc/scheduler/client"
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)
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const (
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reasonScheduleTimeout = "wait first peer packet from scheduler timeout"
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reasonReScheduleTimeout = "wait more available peers from scheduler timeout"
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reasonContextCanceled = "context canceled"
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reasonPeerGoneFromScheduler = "scheduler says client should disconnect"
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failedCodeNotSet = 0
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)
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var errPeerPacketChanged = errors.New("peer packet changed")
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type peerTask struct {
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*logger.SugaredLoggerOnWith
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ctx context.Context
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cancel context.CancelFunc
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// backSource indicates downloading resource from instead of other peers
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backSource bool
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request *scheduler.PeerTaskRequest
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// pieceManager will be used for downloading piece
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pieceManager PieceManager
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// host info about current host
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host *scheduler.PeerHost
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// callback holds some actions, like init, done, fail actions
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callback TaskCallback
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// schedule options
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schedulerOption config.SchedulerOption
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// peer task meta info
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peerID string
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taskID string
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contentLength int64
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totalPiece int32
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completedLength int64
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usedTraffic int64
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//sizeScope base.SizeScope
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singlePiece *scheduler.SinglePiece
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// TODO peerPacketStream
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peerPacketStream schedulerclient.PeerPacketStream
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// peerPacket is the latest available peers from peerPacketCh
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peerPacket *scheduler.PeerPacket
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// peerPacketReady will receive a ready signal for peerPacket ready
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peerPacketReady chan bool
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// pieceParallelCount stands the piece parallel count from peerPacket
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pieceParallelCount int32
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// done channel will be close when peer task is finished
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done chan struct{}
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// peerTaskDone will be true after peer task done
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peerTaskDone bool
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// span stands open telemetry trace span
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span trace.Span
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// same actions must be done only once, like close done channel and so on
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once sync.Once
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// failedPieceCh will hold all pieces which download failed,
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// those pieces will be retry later
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failedPieceCh chan int32
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// failedReason will be set when peer task failed
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failedReason string
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// failedReason will be set when peer task failed
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failedCode base.Code
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// readyPieces stands all pieces download status
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readyPieces *Bitmap
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// requestedPieces stands all pieces requested from peers
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requestedPieces *Bitmap
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// lock used by piece result manage, when update readyPieces, lock first
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lock sync.Locker
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// limiter will be used when enable per peer task rate limit
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limiter *rate.Limiter
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}
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func (pt *peerTask) ReportPieceResult(pieceTask *base.PieceInfo, pieceResult *scheduler.PieceResult) error {
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panic("implement me")
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}
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func (pt *peerTask) SetCallback(callback TaskCallback) {
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pt.callback = callback
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}
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func (pt *peerTask) GetPeerID() string {
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return pt.peerID
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}
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func (pt *peerTask) GetTaskID() string {
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return pt.taskID
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}
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func (pt *peerTask) GetContentLength() int64 {
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return pt.contentLength
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}
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func (pt *peerTask) SetContentLength(i int64) error {
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panic("implement me")
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}
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func (pt *peerTask) AddTraffic(n int64) {
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atomic.AddInt64(&pt.usedTraffic, n)
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}
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func (pt *peerTask) GetTraffic() int64 {
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return pt.usedTraffic
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}
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func (pt *peerTask) GetTotalPieces() int32 {
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return pt.totalPiece
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}
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func (pt *peerTask) Context() context.Context {
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return pt.ctx
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}
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func (pt *peerTask) Log() *logger.SugaredLoggerOnWith {
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return pt.SugaredLoggerOnWith
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}
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func (pt *peerTask) pullPieces(pti Task, cleanUnfinishedFunc func()) {
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// when there is a single piece, try to download first
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if pt.singlePiece != nil {
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go pt.pullSinglePiece(pti, cleanUnfinishedFunc)
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} else {
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go pt.receivePeerPacket()
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go pt.pullPiecesFromPeers(pti, cleanUnfinishedFunc)
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}
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}
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func (pt *peerTask) receivePeerPacket() {
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var (
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peerPacket *scheduler.PeerPacket
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err error
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firstSpanDone bool
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)
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// only record first schedule result
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// other schedule result will record as an event in peer task span
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_, firstPeerSpan := tracer.Start(pt.ctx, config.SpanFirstSchedule)
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defer func() {
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if !firstSpanDone {
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firstPeerSpan.End()
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}
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}()
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loop:
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for {
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select {
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case <-pt.ctx.Done():
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pt.Infof("context done due to %s", pt.ctx.Err())
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break loop
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case <-pt.done:
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pt.Infof("peer task done, stop wait peer packet from scheduler")
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break loop
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default:
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}
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peerPacket, err = pt.peerPacketStream.Recv()
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if err == io.EOF {
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pt.Debugf("peerPacketStream closed")
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break loop
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}
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if err != nil {
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pt.failedCode = dfcodes.UnknownError
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if de, ok := err.(*dferrors.DfError); ok {
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pt.failedCode = de.Code
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pt.failedReason = de.Message
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pt.Errorf("receive peer packet failed: %s", pt.failedReason)
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} else {
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pt.Errorf("receive peer packet failed: %s", err)
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}
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pt.cancel()
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if !firstSpanDone {
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firstPeerSpan.RecordError(err)
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}
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break loop
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}
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if peerPacket.Code != dfcodes.Success {
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pt.Errorf("receive peer packet with error: %d", peerPacket.Code)
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if pt.isExitPeerPacketCode(peerPacket) {
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pt.cancel()
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pt.Errorf(pt.failedReason)
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if !firstSpanDone {
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firstPeerSpan.RecordError(fmt.Errorf(pt.failedReason))
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}
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pt.span.AddEvent("receive exit peer packet",
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trace.WithAttributes(config.AttributePeerPacketCode.Int(int(peerPacket.Code))))
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pt.span.RecordError(fmt.Errorf(pt.failedReason))
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break
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} else {
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pt.span.AddEvent("receive not success peer packet",
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trace.WithAttributes(config.AttributePeerPacketCode.Int(int(peerPacket.Code))))
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}
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continue
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}
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if peerPacket.MainPeer == nil && peerPacket.StealPeers == nil {
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pt.Warnf("scheduler client send a peerPacket with empty peers")
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continue
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}
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pt.Infof("receive new peer packet, main peer: %s, parallel count: %d",
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peerPacket.MainPeer.PeerId, peerPacket.ParallelCount)
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pt.span.AddEvent("receive new peer packet",
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trace.WithAttributes(config.AttributeMainPeer.String(peerPacket.MainPeer.PeerId)))
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if !firstSpanDone {
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firstSpanDone = true
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firstPeerSpan.SetAttributes(config.AttributeMainPeer.String(peerPacket.MainPeer.PeerId))
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firstPeerSpan.End()
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}
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pt.peerPacket = peerPacket
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pt.pieceParallelCount = pt.peerPacket.ParallelCount
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select {
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case pt.peerPacketReady <- true:
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case <-pt.ctx.Done():
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pt.Infof("context done due to %s", pt.ctx.Err())
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break loop
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case <-pt.done:
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pt.Infof("peer task done, stop wait peer packet from scheduler")
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break loop
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default:
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}
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}
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}
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func (pt *peerTask) isExitPeerPacketCode(pp *scheduler.PeerPacket) bool {
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switch pp.Code {
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case dfcodes.ResourceLacked, dfcodes.BadRequest, dfcodes.PeerTaskNotFound, dfcodes.UnknownError, dfcodes.RequestTimeOut:
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// 1xxx
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pt.failedCode = pp.Code
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pt.failedReason = fmt.Sprintf("receive exit peer packet with code %d", pp.Code)
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return true
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case dfcodes.SchedError:
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// 5xxx
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pt.failedCode = pp.Code
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pt.failedReason = fmt.Sprintf("receive exit peer packet with code %d", pp.Code)
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return true
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case dfcodes.SchedPeerGone:
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pt.failedReason = reasonPeerGoneFromScheduler
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pt.failedCode = dfcodes.SchedPeerGone
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return true
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case dfcodes.CdnError, dfcodes.CdnTaskRegistryFail, dfcodes.CdnTaskDownloadFail:
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// 6xxx
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pt.failedCode = pp.Code
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pt.failedReason = fmt.Sprintf("receive exit peer packet with code %d", pp.Code)
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return true
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}
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return false
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}
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func (pt *peerTask) pullSinglePiece(pti Task, cleanUnfinishedFunc func()) {
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pt.Infof("single piece, dest peer id: %s, piece num: %d, size: %d",
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pt.singlePiece.DstPid, pt.singlePiece.PieceInfo.PieceNum, pt.singlePiece.PieceInfo.RangeSize)
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ctx, span := tracer.Start(pt.ctx, fmt.Sprintf(config.SpanDownloadPiece, pt.singlePiece.PieceInfo.PieceNum))
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span.SetAttributes(config.AttributePiece.Int(int(pt.singlePiece.PieceInfo.PieceNum)))
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pt.contentLength = int64(pt.singlePiece.PieceInfo.RangeSize)
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if err := pt.callback.Init(pti); err != nil {
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pt.failedReason = err.Error()
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pt.failedCode = dfcodes.ClientError
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cleanUnfinishedFunc()
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span.RecordError(err)
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span.SetAttributes(config.AttributePieceSuccess.Bool(false))
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span.End()
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return
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}
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request := &DownloadPieceRequest{
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TaskID: pt.GetTaskID(),
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DstPid: pt.singlePiece.DstPid,
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DstAddr: pt.singlePiece.DstAddr,
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piece: pt.singlePiece.PieceInfo,
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}
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if pt.pieceManager.DownloadPiece(ctx, pti, request) {
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pt.Infof("single piece download success")
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span.SetAttributes(config.AttributePieceSuccess.Bool(true))
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span.End()
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} else {
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// fallback to download from other peers
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span.SetAttributes(config.AttributePieceSuccess.Bool(false))
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span.End()
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pt.Warnf("single piece download failed, switch to download from other peers")
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go pt.receivePeerPacket()
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pt.pullPiecesFromPeers(pti, cleanUnfinishedFunc)
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}
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}
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// TODO when main peer is not available, switch to steel peers
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// piece manager need peer task interface, pti make it compatibility for stream peer task
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func (pt *peerTask) pullPiecesFromPeers(pti Task, cleanUnfinishedFunc func()) {
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defer func() {
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close(pt.failedPieceCh)
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cleanUnfinishedFunc()
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}()
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// wait first available peer
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select {
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case <-pt.peerPacketReady:
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// preparePieceTasksByPeer func already send piece result with error
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pt.Infof("new peer client ready, scheduler time cost: %dus, main peer: %s",
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time.Now().Sub(pt.callback.GetStartTime()).Microseconds(), pt.peerPacket.MainPeer)
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case <-time.After(pt.schedulerOption.ScheduleTimeout.Duration):
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pt.failedReason = reasonScheduleTimeout
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pt.failedCode = dfcodes.ClientScheduleTimeout
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pt.Errorf(pt.failedReason)
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return
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}
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var (
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num int32
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limit int32
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initialized bool
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pieceRequestCh chan *DownloadPieceRequest
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pieceBufferSize = int32(16)
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)
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loop:
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for {
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limit = pieceBufferSize
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// check whether catch exit signal or get a failed piece
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// if nothing got, process normal pieces
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select {
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case <-pt.done:
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pt.Infof("peer task done, stop get pieces from peer")
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break loop
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case <-pt.ctx.Done():
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pt.Debugf("context done due to %s", pt.ctx.Err())
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if !pt.peerTaskDone {
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if pt.failedCode == failedCodeNotSet {
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pt.failedReason = reasonContextCanceled
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pt.failedCode = dfcodes.ClientContextCanceled
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pt.callback.Fail(pt, pt.failedCode, pt.ctx.Err().Error())
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} else {
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pt.callback.Fail(pt, pt.failedCode, pt.failedReason)
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}
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}
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break loop
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case failed := <-pt.failedPieceCh:
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pt.Warnf("download piece/%d failed, retry", failed)
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num = failed
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limit = 1
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default:
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}
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pt.Debugf("try to get pieces, number: %d, limit: %d", num, limit)
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piecePacket, err := pt.preparePieceTasks(
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&base.PieceTaskRequest{
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TaskId: pt.taskID,
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SrcPid: pt.peerID,
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StartNum: num,
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Limit: limit,
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})
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if err != nil {
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pt.Warnf("get piece task error: %s, wait available peers from scheduler", err)
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pt.span.RecordError(err)
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select {
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// when peer task without content length or total pieces count, match here
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case <-pt.done:
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pt.Infof("peer task done, stop get pieces from peer")
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case <-pt.ctx.Done():
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pt.Debugf("context done due to %s", pt.ctx.Err())
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if !pt.peerTaskDone {
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if pt.failedCode == failedCodeNotSet {
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pt.failedReason = reasonContextCanceled
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pt.failedCode = dfcodes.ClientContextCanceled
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}
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}
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case <-pt.peerPacketReady:
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// preparePieceTasksByPeer func already send piece result with error
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pt.Infof("new peer client ready, main peer: %s", pt.peerPacket.MainPeer)
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// research from piece 0
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num = pt.getNextPieceNum(0)
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continue loop
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case <-time.After(pt.schedulerOption.ScheduleTimeout.Duration):
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pt.failedReason = reasonReScheduleTimeout
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pt.failedCode = dfcodes.ClientScheduleTimeout
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pt.Errorf(pt.failedReason)
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}
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// only <-pt.peerPacketReady continue loop, others break
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break loop
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}
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if !initialized {
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pt.contentLength = piecePacket.ContentLength
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if pt.contentLength > 0 {
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pt.span.SetAttributes(config.AttributeTaskContentLength.Int64(pt.contentLength))
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}
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initialized = true
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if err = pt.callback.Init(pt); err != nil {
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pt.span.RecordError(err)
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pt.failedReason = err.Error()
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pt.failedCode = dfcodes.ClientError
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break loop
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}
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pc := pt.peerPacket.ParallelCount
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pieceRequestCh = make(chan *DownloadPieceRequest, pieceBufferSize)
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for i := int32(0); i < pc; i++ {
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go pt.downloadPieceWorker(i, pti, pieceRequestCh)
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}
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}
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// update total piece
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if piecePacket.TotalPiece > pt.totalPiece {
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pt.totalPiece = piecePacket.TotalPiece
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_ = pt.callback.Update(pt)
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pt.Debugf("update total piece count: %d", pt.totalPiece)
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}
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// trigger DownloadPiece
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for _, piece := range piecePacket.PieceInfos {
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pt.Infof("get piece %d from %s/%s", piece.PieceNum, piecePacket.DstAddr, piecePacket.DstPid)
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if !pt.requestedPieces.IsSet(piece.PieceNum) {
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pt.requestedPieces.Set(piece.PieceNum)
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}
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req := &DownloadPieceRequest{
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TaskID: pt.GetTaskID(),
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DstPid: piecePacket.DstPid,
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DstAddr: piecePacket.DstAddr,
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piece: piece,
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}
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select {
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case pieceRequestCh <- req:
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case <-pt.done:
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pt.Warnf("peer task done, but still some piece request not process")
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case <-pt.ctx.Done():
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pt.Warnf("context done due to %s", pt.ctx.Err())
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if !pt.peerTaskDone {
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if pt.failedCode == failedCodeNotSet {
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pt.failedReason = reasonContextCanceled
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pt.failedCode = dfcodes.ClientContextCanceled
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}
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}
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}
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}
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num = pt.getNextPieceNum(num)
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if num == -1 {
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pt.Infof("all pieces requests send, just wait failed pieces")
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if pt.isCompleted() {
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break loop
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}
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// use no default branch select to wait failed piece or exit
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select {
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case <-pt.done:
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pt.Infof("peer task done, stop get pieces from peer")
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break loop
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case <-pt.ctx.Done():
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if !pt.peerTaskDone {
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if pt.failedCode == failedCodeNotSet {
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pt.failedReason = reasonContextCanceled
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pt.failedCode = dfcodes.ClientContextCanceled
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}
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pt.Errorf("context done due to %s, progress is not done", pt.ctx.Err())
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} else {
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pt.Debugf("context done due to %s, progress is already done", pt.ctx.Err())
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}
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break loop
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case failed := <-pt.failedPieceCh:
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pt.Warnf("download piece/%d failed, retry", failed)
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num = failed
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limit = 1
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}
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}
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}
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}
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func (pt *peerTask) downloadPieceWorker(id int32, pti Task, requests chan *DownloadPieceRequest) {
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for {
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select {
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case request := <-requests:
|
|
ctx, span := tracer.Start(pt.ctx, fmt.Sprintf(config.SpanDownloadPiece, request.piece.PieceNum))
|
|
span.SetAttributes(config.AttributePiece.Int(int(request.piece.PieceNum)))
|
|
span.SetAttributes(config.AttributePieceWorker.Int(int(id)))
|
|
if pt.limiter != nil {
|
|
_, waitSpan := tracer.Start(ctx, config.SpanWaitPieceLimit)
|
|
if err := pt.limiter.WaitN(pt.ctx, int(request.piece.RangeSize)); err != nil {
|
|
pt.Errorf("request limiter error: %s", err)
|
|
waitSpan.RecordError(err)
|
|
waitSpan.End()
|
|
pti.ReportPieceResult(request.piece,
|
|
&scheduler.PieceResult{
|
|
TaskId: pt.GetTaskID(),
|
|
SrcPid: pt.GetPeerID(),
|
|
DstPid: request.DstPid,
|
|
PieceNum: request.piece.PieceNum,
|
|
Success: false,
|
|
Code: dfcodes.ClientRequestLimitFail,
|
|
HostLoad: nil,
|
|
FinishedCount: 0, // update by peer task
|
|
})
|
|
pt.failedReason = err.Error()
|
|
pt.failedCode = dfcodes.ClientRequestLimitFail
|
|
pt.cancel()
|
|
span.SetAttributes(config.AttributePieceSuccess.Bool(false))
|
|
span.End()
|
|
return
|
|
}
|
|
waitSpan.End()
|
|
}
|
|
pt.Debugf("peer download worker #%d receive piece task, "+
|
|
"dest peer id: %s, piece num: %d, range start: %d, range size: %d",
|
|
id, request.DstPid, request.piece.PieceNum, request.piece.RangeStart, request.piece.RangeSize)
|
|
success := pt.pieceManager.DownloadPiece(ctx, pti, request)
|
|
|
|
span.SetAttributes(config.AttributePieceSuccess.Bool(success))
|
|
span.End()
|
|
case <-pt.done:
|
|
pt.Debugf("peer task done, peer download worker #%d exit", id)
|
|
return
|
|
case <-pt.ctx.Done():
|
|
pt.Debugf("peer task context done, peer download worker #%d exit", id)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func (pt *peerTask) isCompleted() bool {
|
|
return atomic.LoadInt64(&pt.completedLength) == atomic.LoadInt64(&pt.contentLength)
|
|
}
|
|
|
|
func (pt *peerTask) preparePieceTasks(request *base.PieceTaskRequest) (p *base.PiecePacket, err error) {
|
|
defer pt.recoverFromPanic()
|
|
prepare:
|
|
pt.pieceParallelCount = pt.peerPacket.ParallelCount
|
|
request.DstPid = pt.peerPacket.MainPeer.PeerId
|
|
p, err = pt.preparePieceTasksByPeer(pt.peerPacket, pt.peerPacket.MainPeer, request)
|
|
if err == nil {
|
|
return
|
|
}
|
|
if err == errPeerPacketChanged {
|
|
goto prepare
|
|
}
|
|
for _, peer := range pt.peerPacket.StealPeers {
|
|
request.DstPid = peer.PeerId
|
|
p, err = pt.preparePieceTasksByPeer(pt.peerPacket, peer, request)
|
|
if err == nil {
|
|
return
|
|
}
|
|
if err == errPeerPacketChanged {
|
|
goto prepare
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (pt *peerTask) preparePieceTasksByPeer(curPeerPacket *scheduler.PeerPacket, peer *scheduler.PeerPacket_DestPeer, request *base.PieceTaskRequest) (*base.PiecePacket, error) {
|
|
if peer == nil {
|
|
return nil, fmt.Errorf("empty peer")
|
|
}
|
|
var span trace.Span
|
|
_, span = tracer.Start(pt.ctx, config.SpanGetPieceTasks)
|
|
span.SetAttributes(config.AttributeTargetPeerID.String(peer.PeerId))
|
|
span.SetAttributes(config.AttributeGetPieceStartNum.Int(int(request.StartNum)))
|
|
span.SetAttributes(config.AttributeGetPieceLimit.Int(int(request.Limit)))
|
|
defer span.End()
|
|
|
|
// when cdn returns dfcodes.CdnTaskNotFound, report it to scheduler and wait cdn download it.
|
|
retry:
|
|
pt.Debugf("get piece task from peer %s, piece num: %d, limit: %d\"", peer.PeerId, request.StartNum, request.Limit)
|
|
p, err := pt.getPieceTasks(span, curPeerPacket, peer, request)
|
|
if err == nil {
|
|
pt.Infof("get piece task from peer %s ok, pieces length: %d", peer.PeerId, len(p.PieceInfos))
|
|
span.SetAttributes(config.AttributeGetPieceCount.Int(len(p.PieceInfos)))
|
|
return p, nil
|
|
}
|
|
span.RecordError(err)
|
|
if err == errPeerPacketChanged {
|
|
return nil, err
|
|
}
|
|
pt.Debugf("get piece task error: %#v", err)
|
|
|
|
// grpc error
|
|
if se, ok := err.(interface{ GRPCStatus() *status.Status }); ok {
|
|
pt.Debugf("get piece task with grpc error, code: %d", se.GRPCStatus().Code())
|
|
// context canceled, just exit
|
|
if se.GRPCStatus().Code() == codes.Canceled {
|
|
span.AddEvent("context canceled")
|
|
pt.Warnf("get piece task from peer(%s) canceled: %s", peer.PeerId, err)
|
|
return nil, err
|
|
}
|
|
}
|
|
code := dfcodes.ClientPieceRequestFail
|
|
// not grpc error
|
|
if de, ok := err.(*dferrors.DfError); ok && uint32(de.Code) > uint32(codes.Unauthenticated) {
|
|
pt.Debugf("get piece task from peer %s with df error, code: %d", peer.PeerId, de.Code)
|
|
code = de.Code
|
|
}
|
|
pt.Errorf("get piece task from peer(%s) error: %s, code: %d", peer.PeerId, err, code)
|
|
perr := pt.peerPacketStream.Send(&scheduler.PieceResult{
|
|
TaskId: pt.taskID,
|
|
SrcPid: pt.peerID,
|
|
DstPid: peer.PeerId,
|
|
Success: false,
|
|
Code: code,
|
|
HostLoad: nil,
|
|
FinishedCount: -1,
|
|
})
|
|
if perr != nil {
|
|
span.RecordError(perr)
|
|
pt.Errorf("send piece result error: %s, code: %d", err, code)
|
|
}
|
|
|
|
if code == dfcodes.CdnTaskNotFound && curPeerPacket == pt.peerPacket {
|
|
span.AddEvent("retry for CdnTaskNotFound")
|
|
goto retry
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
func (pt *peerTask) getPieceTasks(span trace.Span, curPeerPacket *scheduler.PeerPacket, peer *scheduler.PeerPacket_DestPeer, request *base.PieceTaskRequest) (*base.PiecePacket, error) {
|
|
var (
|
|
peerPacketChanged bool
|
|
count int
|
|
)
|
|
p, _, err := clientutil.Retry(pt.ctx, func() (interface{}, bool, error) {
|
|
pp, getErr := dfclient.GetPieceTasks(pt.ctx, peer, request)
|
|
// when GetPieceTasks returns err, exit retry
|
|
if getErr != nil {
|
|
span.RecordError(getErr)
|
|
// fast way to exit retry
|
|
if curPeerPacket != pt.peerPacket {
|
|
pt.Warnf("get piece tasks with error: %s, but peer packet changed, switch to new peer packet", getErr)
|
|
peerPacketChanged = true
|
|
return nil, true, nil
|
|
}
|
|
return nil, true, getErr
|
|
}
|
|
// by santong: when peer return empty, retry later
|
|
if len(pp.PieceInfos) == 0 {
|
|
count++
|
|
er := pt.peerPacketStream.Send(&scheduler.PieceResult{
|
|
TaskId: pt.taskID,
|
|
SrcPid: pt.peerID,
|
|
DstPid: peer.PeerId,
|
|
Success: false,
|
|
Code: dfcodes.ClientWaitPieceReady,
|
|
HostLoad: nil,
|
|
FinishedCount: pt.readyPieces.Settled(),
|
|
})
|
|
if er != nil {
|
|
span.RecordError(er)
|
|
pt.Errorf("send piece result error: %s, code: %d", peer.PeerId, er)
|
|
}
|
|
// fast way to exit retry
|
|
if curPeerPacket != pt.peerPacket {
|
|
pt.Warnf("get empty pieces and peer packet changed, switch to new peer packet")
|
|
peerPacketChanged = true
|
|
return nil, true, nil
|
|
}
|
|
span.AddEvent("retry due to empty pieces",
|
|
trace.WithAttributes(config.AttributeGetPieceRetry.Int(count)))
|
|
pt.Warnf("peer %s returns success but with empty pieces, retry later", peer.PeerId)
|
|
return nil, false, dferrors.ErrEmptyValue
|
|
}
|
|
return pp, false, nil
|
|
}, 0.05, 0.2, 40, nil)
|
|
if peerPacketChanged {
|
|
return nil, errPeerPacketChanged
|
|
}
|
|
|
|
if err == nil {
|
|
return p.(*base.PiecePacket), nil
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
func (pt *peerTask) getNextPieceNum(cur int32) int32 {
|
|
if pt.isCompleted() {
|
|
return -1
|
|
}
|
|
i := cur
|
|
for ; pt.requestedPieces.IsSet(i); i++ {
|
|
}
|
|
if pt.totalPiece > 0 && i >= pt.totalPiece {
|
|
// double check, re-search not success or not requested pieces
|
|
for i = int32(0); pt.requestedPieces.IsSet(i); i++ {
|
|
}
|
|
if pt.totalPiece > 0 && i >= pt.totalPiece {
|
|
return -1
|
|
}
|
|
}
|
|
return i
|
|
}
|
|
|
|
func (pt *peerTask) recoverFromPanic() {
|
|
if r := recover(); r != nil {
|
|
pt.Errorf("recovered from panic %q. Call stack:\n%v", r, string(debug.Stack()))
|
|
}
|
|
}
|