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.
269 lines
7.4 KiB
269 lines
7.4 KiB
package statesync
|
|
|
|
import (
|
|
"errors"
|
|
"sort"
|
|
"time"
|
|
|
|
abci "github.com/tendermint/tendermint/abci/types"
|
|
tmsync "github.com/tendermint/tendermint/libs/sync"
|
|
"github.com/tendermint/tendermint/p2p"
|
|
ssproto "github.com/tendermint/tendermint/proto/tendermint/statesync"
|
|
"github.com/tendermint/tendermint/proxy"
|
|
sm "github.com/tendermint/tendermint/state"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
const (
|
|
// SnapshotChannel exchanges snapshot metadata
|
|
SnapshotChannel = byte(0x60)
|
|
// ChunkChannel exchanges chunk contents
|
|
ChunkChannel = byte(0x61)
|
|
// recentSnapshots is the number of recent snapshots to send and receive per peer.
|
|
recentSnapshots = 10
|
|
)
|
|
|
|
// Reactor handles state sync, both restoring snapshots for the local node and serving snapshots
|
|
// for other nodes.
|
|
type Reactor struct {
|
|
p2p.BaseReactor
|
|
|
|
conn proxy.AppConnSnapshot
|
|
connQuery proxy.AppConnQuery
|
|
tempDir string
|
|
|
|
// This will only be set when a state sync is in progress. It is used to feed received
|
|
// snapshots and chunks into the sync.
|
|
mtx tmsync.RWMutex
|
|
syncer *syncer
|
|
}
|
|
|
|
// NewReactor creates a new state sync reactor.
|
|
func NewReactor(conn proxy.AppConnSnapshot, connQuery proxy.AppConnQuery, tempDir string) *Reactor {
|
|
r := &Reactor{
|
|
conn: conn,
|
|
connQuery: connQuery,
|
|
}
|
|
r.BaseReactor = *p2p.NewBaseReactor("StateSync", r)
|
|
return r
|
|
}
|
|
|
|
// GetChannels implements p2p.Reactor.
|
|
func (r *Reactor) GetChannels() []*p2p.ChannelDescriptor {
|
|
return []*p2p.ChannelDescriptor{
|
|
{
|
|
ID: SnapshotChannel,
|
|
Priority: 3,
|
|
SendQueueCapacity: 10,
|
|
RecvMessageCapacity: snapshotMsgSize,
|
|
},
|
|
{
|
|
ID: ChunkChannel,
|
|
Priority: 1,
|
|
SendQueueCapacity: 4,
|
|
RecvMessageCapacity: chunkMsgSize,
|
|
},
|
|
}
|
|
}
|
|
|
|
// OnStart implements p2p.Reactor.
|
|
func (r *Reactor) OnStart() error {
|
|
return nil
|
|
}
|
|
|
|
// AddPeer implements p2p.Reactor.
|
|
func (r *Reactor) AddPeer(peer p2p.Peer) {
|
|
r.mtx.RLock()
|
|
defer r.mtx.RUnlock()
|
|
if r.syncer != nil {
|
|
r.syncer.AddPeer(peer)
|
|
}
|
|
}
|
|
|
|
// RemovePeer implements p2p.Reactor.
|
|
func (r *Reactor) RemovePeer(peer p2p.Peer, reason interface{}) {
|
|
r.mtx.RLock()
|
|
defer r.mtx.RUnlock()
|
|
if r.syncer != nil {
|
|
r.syncer.RemovePeer(peer)
|
|
}
|
|
}
|
|
|
|
// Receive implements p2p.Reactor.
|
|
// XXX: do not call any methods that can block or incur heavy processing.
|
|
// https://github.com/tendermint/tendermint/issues/2888
|
|
func (r *Reactor) Receive(chID byte, src p2p.Peer, msgBytes []byte) {
|
|
if !r.IsRunning() {
|
|
return
|
|
}
|
|
|
|
msg, err := decodeMsg(msgBytes)
|
|
if err != nil {
|
|
r.Logger.Error("Error decoding message", "src", src, "chId", chID, "msg", msg, "err", err, "bytes", msgBytes)
|
|
r.Switch.StopPeerForError(src, err)
|
|
return
|
|
}
|
|
err = validateMsg(msg)
|
|
if err != nil {
|
|
r.Logger.Error("Invalid message", "peer", src, "msg", msg, "err", err)
|
|
r.Switch.StopPeerForError(src, err)
|
|
return
|
|
}
|
|
|
|
switch chID {
|
|
case SnapshotChannel:
|
|
switch msg := msg.(type) {
|
|
case *ssproto.SnapshotsRequest:
|
|
snapshots, err := r.recentSnapshots(recentSnapshots)
|
|
if err != nil {
|
|
r.Logger.Error("Failed to fetch snapshots", "err", err)
|
|
return
|
|
}
|
|
for _, snapshot := range snapshots {
|
|
r.Logger.Debug("Advertising snapshot", "height", snapshot.Height,
|
|
"format", snapshot.Format, "peer", src.ID())
|
|
src.Send(chID, mustEncodeMsg(&ssproto.SnapshotsResponse{
|
|
Height: snapshot.Height,
|
|
Format: snapshot.Format,
|
|
Chunks: snapshot.Chunks,
|
|
Hash: snapshot.Hash,
|
|
Metadata: snapshot.Metadata,
|
|
}))
|
|
}
|
|
|
|
case *ssproto.SnapshotsResponse:
|
|
r.mtx.RLock()
|
|
defer r.mtx.RUnlock()
|
|
if r.syncer == nil {
|
|
r.Logger.Debug("Received unexpected snapshot, no state sync in progress")
|
|
return
|
|
}
|
|
r.Logger.Debug("Received snapshot", "height", msg.Height, "format", msg.Format, "peer", src.ID())
|
|
_, err := r.syncer.AddSnapshot(src, &snapshot{
|
|
Height: msg.Height,
|
|
Format: msg.Format,
|
|
Chunks: msg.Chunks,
|
|
Hash: msg.Hash,
|
|
Metadata: msg.Metadata,
|
|
})
|
|
if err != nil {
|
|
r.Logger.Error("Failed to add snapshot", "height", msg.Height, "format", msg.Format,
|
|
"peer", src.ID(), "err", err)
|
|
return
|
|
}
|
|
|
|
default:
|
|
r.Logger.Error("Received unknown message %T", msg)
|
|
}
|
|
|
|
case ChunkChannel:
|
|
switch msg := msg.(type) {
|
|
case *ssproto.ChunkRequest:
|
|
r.Logger.Debug("Received chunk request", "height", msg.Height, "format", msg.Format,
|
|
"chunk", msg.Index, "peer", src.ID())
|
|
resp, err := r.conn.LoadSnapshotChunkSync(abci.RequestLoadSnapshotChunk{
|
|
Height: msg.Height,
|
|
Format: msg.Format,
|
|
Chunk: msg.Index,
|
|
})
|
|
if err != nil {
|
|
r.Logger.Error("Failed to load chunk", "height", msg.Height, "format", msg.Format,
|
|
"chunk", msg.Index, "err", err)
|
|
return
|
|
}
|
|
r.Logger.Debug("Sending chunk", "height", msg.Height, "format", msg.Format,
|
|
"chunk", msg.Index, "peer", src.ID())
|
|
src.Send(ChunkChannel, mustEncodeMsg(&ssproto.ChunkResponse{
|
|
Height: msg.Height,
|
|
Format: msg.Format,
|
|
Index: msg.Index,
|
|
Chunk: resp.Chunk,
|
|
Missing: resp.Chunk == nil,
|
|
}))
|
|
|
|
case *ssproto.ChunkResponse:
|
|
r.mtx.RLock()
|
|
defer r.mtx.RUnlock()
|
|
if r.syncer == nil {
|
|
r.Logger.Debug("Received unexpected chunk, no state sync in progress", "peer", src.ID())
|
|
return
|
|
}
|
|
r.Logger.Debug("Received chunk, adding to sync", "height", msg.Height, "format", msg.Format,
|
|
"chunk", msg.Index, "peer", src.ID())
|
|
_, err := r.syncer.AddChunk(&chunk{
|
|
Height: msg.Height,
|
|
Format: msg.Format,
|
|
Index: msg.Index,
|
|
Chunk: msg.Chunk,
|
|
Sender: src.ID(),
|
|
})
|
|
if err != nil {
|
|
r.Logger.Error("Failed to add chunk", "height", msg.Height, "format", msg.Format,
|
|
"chunk", msg.Index, "err", err)
|
|
return
|
|
}
|
|
|
|
default:
|
|
r.Logger.Error("Received unknown message %T", msg)
|
|
}
|
|
|
|
default:
|
|
r.Logger.Error("Received message on invalid channel %x", chID)
|
|
}
|
|
}
|
|
|
|
// recentSnapshots fetches the n most recent snapshots from the app
|
|
func (r *Reactor) recentSnapshots(n uint32) ([]*snapshot, error) {
|
|
resp, err := r.conn.ListSnapshotsSync(abci.RequestListSnapshots{})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
sort.Slice(resp.Snapshots, func(i, j int) bool {
|
|
a := resp.Snapshots[i]
|
|
b := resp.Snapshots[j]
|
|
switch {
|
|
case a.Height > b.Height:
|
|
return true
|
|
case a.Height == b.Height && a.Format > b.Format:
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
})
|
|
snapshots := make([]*snapshot, 0, n)
|
|
for i, s := range resp.Snapshots {
|
|
if i >= recentSnapshots {
|
|
break
|
|
}
|
|
snapshots = append(snapshots, &snapshot{
|
|
Height: s.Height,
|
|
Format: s.Format,
|
|
Chunks: s.Chunks,
|
|
Hash: s.Hash,
|
|
Metadata: s.Metadata,
|
|
})
|
|
}
|
|
return snapshots, nil
|
|
}
|
|
|
|
// Sync runs a state sync, returning the new state and last commit at the snapshot height.
|
|
// The caller must store the state and commit in the state database and block store.
|
|
func (r *Reactor) Sync(stateProvider StateProvider, discoveryTime time.Duration) (sm.State, *types.Commit, error) {
|
|
r.mtx.Lock()
|
|
if r.syncer != nil {
|
|
r.mtx.Unlock()
|
|
return sm.State{}, nil, errors.New("a state sync is already in progress")
|
|
}
|
|
r.syncer = newSyncer(r.Logger, r.conn, r.connQuery, stateProvider, r.tempDir)
|
|
r.mtx.Unlock()
|
|
|
|
// Request snapshots from all currently connected peers
|
|
r.Logger.Debug("Requesting snapshots from known peers")
|
|
r.Switch.Broadcast(SnapshotChannel, mustEncodeMsg(&ssproto.SnapshotsRequest{}))
|
|
|
|
state, commit, err := r.syncer.SyncAny(discoveryTime)
|
|
r.mtx.Lock()
|
|
r.syncer = nil
|
|
r.mtx.Unlock()
|
|
return state, commit, err
|
|
}
|