You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
395 lines
12 KiB
395 lines
12 KiB
package v1
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"sync"
|
|
"time"
|
|
|
|
cfg "github.com/tendermint/tendermint/config"
|
|
tmsync "github.com/tendermint/tendermint/internal/libs/sync"
|
|
"github.com/tendermint/tendermint/libs/log"
|
|
"github.com/tendermint/tendermint/libs/service"
|
|
"github.com/tendermint/tendermint/mempool"
|
|
"github.com/tendermint/tendermint/p2p"
|
|
protomem "github.com/tendermint/tendermint/proto/tendermint/mempool"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
var (
|
|
_ service.Service = (*Reactor)(nil)
|
|
_ p2p.Wrapper = (*protomem.Message)(nil)
|
|
)
|
|
|
|
// PeerManager defines the interface contract required for getting necessary
|
|
// peer information. This should eventually be replaced with a message-oriented
|
|
// approach utilizing the p2p stack.
|
|
type PeerManager interface {
|
|
GetHeight(p2p.NodeID) int64
|
|
}
|
|
|
|
// Reactor implements a service that contains mempool of txs that are broadcasted
|
|
// amongst peers. It maintains a map from peer ID to counter, to prevent gossiping
|
|
// txs to the peers you received it from.
|
|
type Reactor struct {
|
|
service.BaseService
|
|
|
|
config *cfg.MempoolConfig
|
|
mempool *TxMempool
|
|
ids *mempool.MempoolIDs
|
|
|
|
// XXX: Currently, this is the only way to get information about a peer. Ideally,
|
|
// we rely on message-oriented communication to get necessary peer data.
|
|
// ref: https://github.com/tendermint/tendermint/issues/5670
|
|
peerMgr PeerManager
|
|
|
|
mempoolCh *p2p.Channel
|
|
peerUpdates *p2p.PeerUpdates
|
|
closeCh chan struct{}
|
|
|
|
// peerWG is used to coordinate graceful termination of all peer broadcasting
|
|
// goroutines.
|
|
peerWG sync.WaitGroup
|
|
|
|
mtx tmsync.Mutex
|
|
peerRoutines map[p2p.NodeID]*tmsync.Closer
|
|
}
|
|
|
|
// NewReactor returns a reference to a new reactor.
|
|
func NewReactor(
|
|
logger log.Logger,
|
|
config *cfg.MempoolConfig,
|
|
peerMgr PeerManager,
|
|
txmp *TxMempool,
|
|
mempoolCh *p2p.Channel,
|
|
peerUpdates *p2p.PeerUpdates,
|
|
) *Reactor {
|
|
|
|
r := &Reactor{
|
|
config: config,
|
|
peerMgr: peerMgr,
|
|
mempool: txmp,
|
|
ids: mempool.NewMempoolIDs(),
|
|
mempoolCh: mempoolCh,
|
|
peerUpdates: peerUpdates,
|
|
closeCh: make(chan struct{}),
|
|
peerRoutines: make(map[p2p.NodeID]*tmsync.Closer),
|
|
}
|
|
|
|
r.BaseService = *service.NewBaseService(logger, "Mempool", r)
|
|
return r
|
|
}
|
|
|
|
// GetChannelShims returns a map of ChannelDescriptorShim objects, where each
|
|
// object wraps a reference to a legacy p2p ChannelDescriptor and the corresponding
|
|
// p2p proto.Message the new p2p Channel is responsible for handling.
|
|
//
|
|
//
|
|
// TODO: Remove once p2p refactor is complete.
|
|
// ref: https://github.com/tendermint/tendermint/issues/5670
|
|
func GetChannelShims(config *cfg.MempoolConfig) map[p2p.ChannelID]*p2p.ChannelDescriptorShim {
|
|
largestTx := make([]byte, config.MaxTxBytes)
|
|
batchMsg := protomem.Message{
|
|
Sum: &protomem.Message_Txs{
|
|
Txs: &protomem.Txs{Txs: [][]byte{largestTx}},
|
|
},
|
|
}
|
|
|
|
return map[p2p.ChannelID]*p2p.ChannelDescriptorShim{
|
|
mempool.MempoolChannel: {
|
|
MsgType: new(protomem.Message),
|
|
Descriptor: &p2p.ChannelDescriptor{
|
|
ID: byte(mempool.MempoolChannel),
|
|
Priority: 5,
|
|
RecvMessageCapacity: batchMsg.Size(),
|
|
|
|
MaxSendBytes: 5000,
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
// OnStart starts separate go routines for each p2p Channel and listens for
|
|
// envelopes on each. In addition, it also listens for peer updates and handles
|
|
// messages on that p2p channel accordingly. The caller must be sure to execute
|
|
// OnStop to ensure the outbound p2p Channels are closed.
|
|
func (r *Reactor) OnStart() error {
|
|
if !r.config.Broadcast {
|
|
r.Logger.Info("tx broadcasting is disabled")
|
|
}
|
|
|
|
go r.processMempoolCh()
|
|
go r.processPeerUpdates()
|
|
|
|
return nil
|
|
}
|
|
|
|
// OnStop stops the reactor by signaling to all spawned goroutines to exit and
|
|
// blocking until they all exit.
|
|
func (r *Reactor) OnStop() {
|
|
r.mtx.Lock()
|
|
for _, c := range r.peerRoutines {
|
|
c.Close()
|
|
}
|
|
r.mtx.Unlock()
|
|
|
|
// wait for all spawned peer tx broadcasting goroutines to gracefully exit
|
|
r.peerWG.Wait()
|
|
|
|
// Close closeCh to signal to all spawned goroutines to gracefully exit. All
|
|
// p2p Channels should execute Close().
|
|
close(r.closeCh)
|
|
|
|
// Wait for all p2p Channels to be closed before returning. This ensures we
|
|
// can easily reason about synchronization of all p2p Channels and ensure no
|
|
// panics will occur.
|
|
<-r.mempoolCh.Done()
|
|
<-r.peerUpdates.Done()
|
|
}
|
|
|
|
// handleMempoolMessage handles envelopes sent from peers on the MempoolChannel.
|
|
// For every tx in the message, we execute CheckTx. It returns an error if an
|
|
// empty set of txs are sent in an envelope or if we receive an unexpected
|
|
// message type.
|
|
func (r *Reactor) handleMempoolMessage(envelope p2p.Envelope) error {
|
|
logger := r.Logger.With("peer", envelope.From)
|
|
|
|
switch msg := envelope.Message.(type) {
|
|
case *protomem.Txs:
|
|
protoTxs := msg.GetTxs()
|
|
if len(protoTxs) == 0 {
|
|
return errors.New("empty txs received from peer")
|
|
}
|
|
|
|
txInfo := mempool.TxInfo{SenderID: r.ids.GetForPeer(envelope.From)}
|
|
if len(envelope.From) != 0 {
|
|
txInfo.SenderNodeID = envelope.From
|
|
}
|
|
|
|
for _, tx := range protoTxs {
|
|
if err := r.mempool.CheckTx(context.Background(), types.Tx(tx), nil, txInfo); err != nil {
|
|
logger.Error("checktx failed for tx", "tx", fmt.Sprintf("%X", mempool.TxHashFromBytes(tx)), "err", err)
|
|
}
|
|
}
|
|
|
|
default:
|
|
return fmt.Errorf("received unknown message: %T", msg)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// handleMessage handles an Envelope sent from a peer on a specific p2p Channel.
|
|
// It will handle errors and any possible panics gracefully. A caller can handle
|
|
// any error returned by sending a PeerError on the respective channel.
|
|
func (r *Reactor) handleMessage(chID p2p.ChannelID, envelope p2p.Envelope) (err error) {
|
|
defer func() {
|
|
if e := recover(); e != nil {
|
|
err = fmt.Errorf("panic in processing message: %v", e)
|
|
}
|
|
}()
|
|
|
|
r.Logger.Debug("received message", "peer", envelope.From)
|
|
|
|
switch chID {
|
|
case mempool.MempoolChannel:
|
|
err = r.handleMempoolMessage(envelope)
|
|
|
|
default:
|
|
err = fmt.Errorf("unknown channel ID (%d) for envelope (%T)", chID, envelope.Message)
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
// processMempoolCh implements a blocking event loop where we listen for p2p
|
|
// Envelope messages from the mempoolCh.
|
|
func (r *Reactor) processMempoolCh() {
|
|
defer r.mempoolCh.Close()
|
|
|
|
for {
|
|
select {
|
|
case envelope := <-r.mempoolCh.In:
|
|
if err := r.handleMessage(r.mempoolCh.ID, envelope); err != nil {
|
|
r.Logger.Error("failed to process message", "ch_id", r.mempoolCh.ID, "envelope", envelope, "err", err)
|
|
r.mempoolCh.Error <- p2p.PeerError{
|
|
NodeID: envelope.From,
|
|
Err: err,
|
|
}
|
|
}
|
|
|
|
case <-r.closeCh:
|
|
r.Logger.Debug("stopped listening on mempool channel; closing...")
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// processPeerUpdate processes a PeerUpdate. For added peers, PeerStatusUp, we
|
|
// check if the reactor is running and if we've already started a tx broadcasting
|
|
// goroutine or not. If not, we start one for the newly added peer. For down or
|
|
// removed peers, we remove the peer from the mempool peer ID set and signal to
|
|
// stop the tx broadcasting goroutine.
|
|
func (r *Reactor) processPeerUpdate(peerUpdate p2p.PeerUpdate) {
|
|
r.Logger.Debug("received peer update", "peer", peerUpdate.NodeID, "status", peerUpdate.Status)
|
|
|
|
r.mtx.Lock()
|
|
defer r.mtx.Unlock()
|
|
|
|
switch peerUpdate.Status {
|
|
case p2p.PeerStatusUp:
|
|
// Do not allow starting new tx broadcast loops after reactor shutdown
|
|
// has been initiated. This can happen after we've manually closed all
|
|
// peer broadcast loops and closed r.closeCh, but the router still sends
|
|
// in-flight peer updates.
|
|
if !r.IsRunning() {
|
|
return
|
|
}
|
|
|
|
if r.config.Broadcast {
|
|
// Check if we've already started a goroutine for this peer, if not we create
|
|
// a new done channel so we can explicitly close the goroutine if the peer
|
|
// is later removed, we increment the waitgroup so the reactor can stop
|
|
// safely, and finally start the goroutine to broadcast txs to that peer.
|
|
_, ok := r.peerRoutines[peerUpdate.NodeID]
|
|
if !ok {
|
|
closer := tmsync.NewCloser()
|
|
|
|
r.peerRoutines[peerUpdate.NodeID] = closer
|
|
r.peerWG.Add(1)
|
|
|
|
r.ids.ReserveForPeer(peerUpdate.NodeID)
|
|
|
|
// start a broadcast routine ensuring all txs are forwarded to the peer
|
|
go r.broadcastTxRoutine(peerUpdate.NodeID, closer)
|
|
}
|
|
}
|
|
|
|
case p2p.PeerStatusDown:
|
|
r.ids.Reclaim(peerUpdate.NodeID)
|
|
|
|
// Check if we've started a tx broadcasting goroutine for this peer.
|
|
// If we have, we signal to terminate the goroutine via the channel's closure.
|
|
// This will internally decrement the peer waitgroup and remove the peer
|
|
// from the map of peer tx broadcasting goroutines.
|
|
closer, ok := r.peerRoutines[peerUpdate.NodeID]
|
|
if ok {
|
|
closer.Close()
|
|
}
|
|
}
|
|
}
|
|
|
|
// processPeerUpdates initiates a blocking process where we listen for and handle
|
|
// PeerUpdate messages. When the reactor is stopped, we will catch the signal and
|
|
// close the p2p PeerUpdatesCh gracefully.
|
|
func (r *Reactor) processPeerUpdates() {
|
|
defer r.peerUpdates.Close()
|
|
|
|
for {
|
|
select {
|
|
case peerUpdate := <-r.peerUpdates.Updates():
|
|
r.processPeerUpdate(peerUpdate)
|
|
|
|
case <-r.closeCh:
|
|
r.Logger.Debug("stopped listening on peer updates channel; closing...")
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func (r *Reactor) broadcastTxRoutine(peerID p2p.NodeID, closer *tmsync.Closer) {
|
|
peerMempoolID := r.ids.GetForPeer(peerID)
|
|
var memTx *WrappedTx
|
|
|
|
// remove the peer ID from the map of routines and mark the waitgroup as done
|
|
defer func() {
|
|
r.mtx.Lock()
|
|
delete(r.peerRoutines, peerID)
|
|
r.mtx.Unlock()
|
|
|
|
r.peerWG.Done()
|
|
|
|
if e := recover(); e != nil {
|
|
r.Logger.Error("recovering from broadcasting mempool loop", "err", e)
|
|
}
|
|
}()
|
|
|
|
for {
|
|
if !r.IsRunning() {
|
|
return
|
|
}
|
|
|
|
// This happens because the CElement we were looking at got garbage
|
|
// collected (removed). That is, .NextWait() returned nil. Go ahead and
|
|
// start from the beginning.
|
|
if memTx == nil {
|
|
select {
|
|
case <-r.mempool.WaitForNextTx(): // wait until a tx is available
|
|
if memTx = r.mempool.NextGossipTx(); memTx == nil {
|
|
continue
|
|
}
|
|
|
|
case <-closer.Done():
|
|
// The peer is marked for removal via a PeerUpdate as the doneCh was
|
|
// explicitly closed to signal we should exit.
|
|
return
|
|
|
|
case <-r.closeCh:
|
|
// The reactor has signaled that we are stopped and thus we should
|
|
// implicitly exit this peer's goroutine.
|
|
return
|
|
}
|
|
}
|
|
|
|
if r.peerMgr != nil {
|
|
height := r.peerMgr.GetHeight(peerID)
|
|
if height > 0 && height < memTx.height-1 {
|
|
// allow for a lag of one block
|
|
time.Sleep(mempool.PeerCatchupSleepIntervalMS * time.Millisecond)
|
|
continue
|
|
}
|
|
}
|
|
|
|
// NOTE: Transaction batching was disabled due to:
|
|
// https://github.com/tendermint/tendermint/issues/5796
|
|
if ok := r.mempool.txStore.TxHasPeer(memTx.hash, peerMempoolID); !ok {
|
|
// Send the mempool tx to the corresponding peer. Note, the peer may be
|
|
// behind and thus would not be able to process the mempool tx correctly.
|
|
r.mempoolCh.Out <- p2p.Envelope{
|
|
To: peerID,
|
|
Message: &protomem.Txs{
|
|
Txs: [][]byte{memTx.tx},
|
|
},
|
|
}
|
|
r.Logger.Debug(
|
|
"gossiped tx to peer",
|
|
"tx", fmt.Sprintf("%X", mempool.TxHashFromBytes(memTx.tx)),
|
|
"peer", peerID,
|
|
)
|
|
}
|
|
|
|
select {
|
|
case <-memTx.gossipEl.NextWaitChan():
|
|
// If there is a next element in gossip index, we point memTx to that node's
|
|
// value, otherwise we reset memTx to nil which will be checked at the
|
|
// parent for loop.
|
|
next := memTx.gossipEl.Next()
|
|
if next != nil {
|
|
memTx = next.Value.(*WrappedTx)
|
|
} else {
|
|
memTx = nil
|
|
}
|
|
|
|
case <-closer.Done():
|
|
// The peer is marked for removal via a PeerUpdate as the doneCh was
|
|
// explicitly closed to signal we should exit.
|
|
return
|
|
|
|
case <-r.closeCh:
|
|
// The reactor has signaled that we are stopped and thus we should
|
|
// implicitly exit this peer's goroutine.
|
|
return
|
|
}
|
|
}
|
|
}
|