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split files, implement peer tracker

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This commit is contained in:
whyrusleeping 2019-11-10 11:33:08 -08:00
parent 904fdad4c6
commit c74f87fd51
4 changed files with 403 additions and 316 deletions
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316
chain/blocksync/blocksync.go
View File

@ -3,12 +3,7 @@ package blocksync
import ( import (
"bufio" "bufio"
"context" "context"
"fmt"
"math/rand"
"sync"
bserv "github.com/ipfs/go-blockservice"
"github.com/libp2p/go-libp2p-core/host"
"github.com/libp2p/go-libp2p-core/protocol" "github.com/libp2p/go-libp2p-core/protocol"
"go.opencensus.io/trace" "go.opencensus.io/trace"
"golang.org/x/xerrors" "golang.org/x/xerrors"
@ -16,9 +11,7 @@ import (
"github.com/filecoin-project/lotus/chain/store" "github.com/filecoin-project/lotus/chain/store"
"github.com/filecoin-project/lotus/chain/types" "github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/lib/cborutil" "github.com/filecoin-project/lotus/lib/cborutil"
"github.com/filecoin-project/lotus/node/modules/dtypes"
blocks "github.com/ipfs/go-block-format"
"github.com/ipfs/go-cid" "github.com/ipfs/go-cid"
cbor "github.com/ipfs/go-ipld-cbor" cbor "github.com/ipfs/go-ipld-cbor"
logging "github.com/ipfs/go-log" logging "github.com/ipfs/go-log"
@ -224,151 +217,6 @@ func (bss *BlockSyncService) gatherMessages(ts *types.TipSet) ([]*types.Message,
return blsmsgs, blsincl, secpkmsgs, secpkincl, nil return blsmsgs, blsincl, secpkmsgs, secpkincl, nil
} }
type BlockSync struct {
bserv bserv.BlockService
host host.Host
syncPeersLk sync.Mutex
syncPeers map[peer.ID]struct{}
}
func NewBlockSyncClient(bserv dtypes.ChainBlockService, h host.Host) *BlockSync {
return &BlockSync{
bserv: bserv,
host: h,
syncPeers: make(map[peer.ID]struct{}),
}
}
func (bs *BlockSync) processStatus(req *BlockSyncRequest, res *BlockSyncResponse) error {
switch res.Status {
case 101: // Partial Response
panic("not handled")
case 201: // req.Start not found
return fmt.Errorf("not found")
case 202: // Go Away
panic("not handled")
case 203: // Internal Error
return fmt.Errorf("block sync peer errored: %s", res.Message)
case 204:
return fmt.Errorf("block sync request invalid: %s", res.Message)
default:
return fmt.Errorf("unrecognized response code: %d", res.Status)
}
}
func (bs *BlockSync) GetBlocks(ctx context.Context, tipset []cid.Cid, count int) ([]*types.TipSet, error) {
ctx, span := trace.StartSpan(ctx, "bsync.GetBlocks")
defer span.End()
if span.IsRecordingEvents() {
span.AddAttributes(
trace.StringAttribute("tipset", fmt.Sprint(tipset)),
trace.Int64Attribute("count", int64(count)),
)
}
peers := bs.getPeers()
perm := rand.Perm(len(peers))
// TODO: round robin through these peers on error
req := &BlockSyncRequest{
Start: tipset,
RequestLength: uint64(count),
Options: BSOptBlocks,
}
var oerr error
for _, p := range perm {
res, err := bs.sendRequestToPeer(ctx, peers[p], req)
if err != nil {
oerr = err
log.Warnf("BlockSync request failed for peer %s: %s", peers[p].String(), err)
continue
}
if res.Status == 0 {
return bs.processBlocksResponse(req, res)
}
oerr = bs.processStatus(req, res)
if oerr != nil {
log.Warnf("BlockSync peer %s response was an error: %s", peers[p].String(), oerr)
}
}
return nil, xerrors.Errorf("GetBlocks failed with all peers: %w", oerr)
}
func (bs *BlockSync) GetFullTipSet(ctx context.Context, p peer.ID, h []cid.Cid) (*store.FullTipSet, error) {
// TODO: round robin through these peers on error
req := &BlockSyncRequest{
Start: h,
RequestLength: 1,
Options: BSOptBlocks | BSOptMessages,
}
res, err := bs.sendRequestToPeer(ctx, p, req)
if err != nil {
return nil, err
}
switch res.Status {
case 0: // Success
if len(res.Chain) == 0 {
return nil, fmt.Errorf("got zero length chain response")
}
bts := res.Chain[0]
return bstsToFullTipSet(bts)
case 101: // Partial Response
panic("not handled")
case 201: // req.Start not found
return nil, fmt.Errorf("not found")
case 202: // Go Away
panic("not handled")
case 203: // Internal Error
return nil, fmt.Errorf("block sync peer errored: %q", res.Message)
case 204: // Invalid Request
return nil, fmt.Errorf("block sync request invalid: %q", res.Message)
default:
return nil, fmt.Errorf("unrecognized response code")
}
}
func (bs *BlockSync) GetChainMessages(ctx context.Context, h *types.TipSet, count uint64) ([]*BSTipSet, error) {
ctx, span := trace.StartSpan(ctx, "GetChainMessages")
defer span.End()
peers := bs.getPeers()
perm := rand.Perm(len(peers))
// TODO: round robin through these peers on error
req := &BlockSyncRequest{
Start: h.Cids(),
RequestLength: count,
Options: BSOptMessages | BSOptBlocks,
}
var err error
for _, p := range perm {
res, err := bs.sendRequestToPeer(ctx, peers[p], req)
if err != nil {
log.Warnf("BlockSync request failed for peer %s: %s", peers[p].String(), err)
continue
}
if res.Status == 0 {
return res.Chain, nil
}
err = bs.processStatus(req, res)
if err != nil {
log.Warnf("BlockSync peer %s response was an error: %s", peers[p].String(), err)
}
}
// TODO: What if we have no peers (and err is nil)?
return nil, xerrors.Errorf("GetChainMessages failed with all peers(%d): %w", len(peers), err)
}
func bstsToFullTipSet(bts *BSTipSet) (*store.FullTipSet, error) { func bstsToFullTipSet(bts *BSTipSet) (*store.FullTipSet, error) {
fts := &store.FullTipSet{} fts := &store.FullTipSet{}
for i, b := range bts.Blocks { for i, b := range bts.Blocks {
@ -387,167 +235,3 @@ func bstsToFullTipSet(bts *BSTipSet) (*store.FullTipSet, error) {
return fts, nil return fts, nil
} }
func (bs *BlockSync) sendRequestToPeer(ctx context.Context, p peer.ID, req *BlockSyncRequest) (*BlockSyncResponse, error) {
ctx, span := trace.StartSpan(ctx, "sendRequestToPeer")
defer span.End()
if span.IsRecordingEvents() {
span.AddAttributes(
trace.StringAttribute("peer", p.Pretty()),
)
}
s, err := bs.host.NewStream(inet.WithNoDial(ctx, "should already have connection"), p, BlockSyncProtocolID)
if err != nil {
bs.RemovePeer(p)
return nil, err
}
if err := cborutil.WriteCborRPC(s, req); err != nil {
return nil, err
}
var res BlockSyncResponse
if err := cborutil.ReadCborRPC(bufio.NewReader(s), &res); err != nil {
return nil, err
}
return &res, nil
}
func (bs *BlockSync) processBlocksResponse(req *BlockSyncRequest, res *BlockSyncResponse) ([]*types.TipSet, error) {
cur, err := types.NewTipSet(res.Chain[0].Blocks)
if err != nil {
return nil, err
}
out := []*types.TipSet{cur}
for bi := 1; bi < len(res.Chain); bi++ {
next := res.Chain[bi].Blocks
nts, err := types.NewTipSet(next)
if err != nil {
return nil, err
}
if !types.CidArrsEqual(cur.Parents(), nts.Cids()) {
return nil, fmt.Errorf("parents of tipset[%d] were not tipset[%d]", bi-1, bi)
}
out = append(out, nts)
cur = nts
}
return out, nil
}
func (bs *BlockSync) GetBlock(ctx context.Context, c cid.Cid) (*types.BlockHeader, error) {
sb, err := bs.bserv.GetBlock(ctx, c)
if err != nil {
return nil, err
}
return types.DecodeBlock(sb.RawData())
}
func (bs *BlockSync) AddPeer(p peer.ID) {
bs.syncPeersLk.Lock()
defer bs.syncPeersLk.Unlock()
bs.syncPeers[p] = struct{}{}
}
func (bs *BlockSync) RemovePeer(p peer.ID) {
bs.syncPeersLk.Lock()
defer bs.syncPeersLk.Unlock()
delete(bs.syncPeers, p)
}
func (bs *BlockSync) getPeers() []peer.ID {
bs.syncPeersLk.Lock()
defer bs.syncPeersLk.Unlock()
var out []peer.ID
for p := range bs.syncPeers {
out = append(out, p)
}
return out
}
func (bs *BlockSync) logPeerQuality(p peer.ID) {
}
func (bs *BlockSync) FetchMessagesByCids(ctx context.Context, cids []cid.Cid) ([]*types.Message, error) {
out := make([]*types.Message, len(cids))
err := bs.fetchCids(ctx, cids, func(i int, b blocks.Block) error {
msg, err := types.DecodeMessage(b.RawData())
if err != nil {
return err
}
if out[i] != nil {
return fmt.Errorf("received duplicate message")
}
out[i] = msg
return nil
})
if err != nil {
return nil, err
}
return out, nil
}
func (bs *BlockSync) FetchSignedMessagesByCids(ctx context.Context, cids []cid.Cid) ([]*types.SignedMessage, error) {
out := make([]*types.SignedMessage, len(cids))
err := bs.fetchCids(ctx, cids, func(i int, b blocks.Block) error {
smsg, err := types.DecodeSignedMessage(b.RawData())
if err != nil {
return err
}
if out[i] != nil {
return fmt.Errorf("received duplicate message")
}
out[i] = smsg
return nil
})
if err != nil {
return nil, err
}
return out, nil
}
func (bs *BlockSync) fetchCids(ctx context.Context, cids []cid.Cid, cb func(int, blocks.Block) error) error {
resp := bs.bserv.GetBlocks(context.TODO(), cids)
m := make(map[cid.Cid]int)
for i, c := range cids {
m[c] = i
}
for i := 0; i < len(cids); i++ {
select {
case v, ok := <-resp:
if !ok {
if i == len(cids)-1 {
break
}
return fmt.Errorf("failed to fetch all messages")
}
ix, ok := m[v.Cid()]
if !ok {
return fmt.Errorf("received message we didnt ask for")
}
if err := cb(ix, v); err != nil {
return err
}
}
}
return nil
}

400
chain/blocksync/blocksync_client.go Normal file
View File

@ -0,0 +1,400 @@
package blocksync
import (
"bufio"
"context"
"fmt"
"math/rand"
"sort"
"sync"
"time"
blocks "github.com/ipfs/go-block-format"
bserv "github.com/ipfs/go-blockservice"
"github.com/ipfs/go-cid"
inet "github.com/libp2p/go-libp2p-core/network"
"github.com/libp2p/go-libp2p-core/peer"
host "github.com/libp2p/go-libp2p-host"
"go.opencensus.io/trace"
"golang.org/x/xerrors"
"github.com/filecoin-project/lotus/chain/store"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/lib/cborutil"
"github.com/filecoin-project/lotus/node/modules/dtypes"
)
type BlockSync struct {
bserv bserv.BlockService
host host.Host
syncPeersLk sync.Mutex
syncPeers *bsPeerTracker
}
func NewBlockSyncClient(bserv dtypes.ChainBlockService, h host.Host) *BlockSync {
return &BlockSync{
bserv: bserv,
host: h,
syncPeers: newPeerTracker(),
}
}
func (bs *BlockSync) processStatus(req *BlockSyncRequest, res *BlockSyncResponse) error {
switch res.Status {
case 101: // Partial Response
panic("not handled")
case 201: // req.Start not found
return fmt.Errorf("not found")
case 202: // Go Away
panic("not handled")
case 203: // Internal Error
return fmt.Errorf("block sync peer errored: %s", res.Message)
case 204:
return fmt.Errorf("block sync request invalid: %s", res.Message)
default:
return fmt.Errorf("unrecognized response code: %d", res.Status)
}
}
func (bs *BlockSync) GetBlocks(ctx context.Context, tipset []cid.Cid, count int) ([]*types.TipSet, error) {
ctx, span := trace.StartSpan(ctx, "bsync.GetBlocks")
defer span.End()
if span.IsRecordingEvents() {
span.AddAttributes(
trace.StringAttribute("tipset", fmt.Sprint(tipset)),
trace.Int64Attribute("count", int64(count)),
)
}
peers := bs.getPeers()
perm := rand.Perm(len(peers))
// TODO: round robin through these peers on error
req := &BlockSyncRequest{
Start: tipset,
RequestLength: uint64(count),
Options: BSOptBlocks,
}
var oerr error
for _, p := range perm {
res, err := bs.sendRequestToPeer(ctx, peers[p], req)
if err != nil {
oerr = err
log.Warnf("BlockSync request failed for peer %s: %s", peers[p].String(), err)
continue
}
if res.Status == 0 {
return bs.processBlocksResponse(req, res)
}
oerr = bs.processStatus(req, res)
if oerr != nil {
log.Warnf("BlockSync peer %s response was an error: %s", peers[p].String(), oerr)
}
}
return nil, xerrors.Errorf("GetBlocks failed with all peers: %w", oerr)
}
func (bs *BlockSync) GetFullTipSet(ctx context.Context, p peer.ID, h []cid.Cid) (*store.FullTipSet, error) {
// TODO: round robin through these peers on error
req := &BlockSyncRequest{
Start: h,
RequestLength: 1,
Options: BSOptBlocks | BSOptMessages,
}
res, err := bs.sendRequestToPeer(ctx, p, req)
if err != nil {
return nil, err
}
switch res.Status {
case 0: // Success
if len(res.Chain) == 0 {
return nil, fmt.Errorf("got zero length chain response")
}
bts := res.Chain[0]
return bstsToFullTipSet(bts)
case 101: // Partial Response
return nil, xerrors.Errorf("partial responses are not handled")
case 201: // req.Start not found
return nil, fmt.Errorf("not found")
case 202: // Go Away
return nil, xerrors.Errorf("received 'go away' response peer")
case 203: // Internal Error
return nil, fmt.Errorf("block sync peer errored: %q", res.Message)
case 204: // Invalid Request
return nil, fmt.Errorf("block sync request invalid: %q", res.Message)
default:
return nil, fmt.Errorf("unrecognized response code")
}
}
func (bs *BlockSync) GetChainMessages(ctx context.Context, h *types.TipSet, count uint64) ([]*BSTipSet, error) {
ctx, span := trace.StartSpan(ctx, "GetChainMessages")
defer span.End()
peers := bs.getPeers()
perm := rand.Perm(len(peers))
// TODO: round robin through these peers on error
req := &BlockSyncRequest{
Start: h.Cids(),
RequestLength: count,
Options: BSOptMessages | BSOptBlocks,
}
var err error
for _, p := range perm {
res, err := bs.sendRequestToPeer(ctx, peers[p], req)
if err != nil {
log.Warnf("BlockSync request failed for peer %s: %s", peers[p].String(), err)
continue
}
if res.Status == 0 {
return res.Chain, nil
}
err = bs.processStatus(req, res)
if err != nil {
log.Warnf("BlockSync peer %s response was an error: %s", peers[p].String(), err)
}
}
// TODO: What if we have no peers (and err is nil)?
return nil, xerrors.Errorf("GetChainMessages failed with all peers(%d): %w", len(peers), err)
}
func (bs *BlockSync) sendRequestToPeer(ctx context.Context, p peer.ID, req *BlockSyncRequest) (*BlockSyncResponse, error) {
ctx, span := trace.StartSpan(ctx, "sendRequestToPeer")
defer span.End()
if span.IsRecordingEvents() {
span.AddAttributes(
trace.StringAttribute("peer", p.Pretty()),
)
}
s, err := bs.host.NewStream(inet.WithNoDial(ctx, "should already have connection"), p, BlockSyncProtocolID)
if err != nil {
bs.RemovePeer(p)
return nil, err
}
if err := cborutil.WriteCborRPC(s, req); err != nil {
return nil, err
}
var res BlockSyncResponse
if err := cborutil.ReadCborRPC(bufio.NewReader(s), &res); err != nil {
return nil, err
}
return &res, nil
}
func (bs *BlockSync) processBlocksResponse(req *BlockSyncRequest, res *BlockSyncResponse) ([]*types.TipSet, error) {
cur, err := types.NewTipSet(res.Chain[0].Blocks)
if err != nil {
return nil, err
}
out := []*types.TipSet{cur}
for bi := 1; bi < len(res.Chain); bi++ {
next := res.Chain[bi].Blocks
nts, err := types.NewTipSet(next)
if err != nil {
return nil, err
}
if !types.CidArrsEqual(cur.Parents(), nts.Cids()) {
return nil, fmt.Errorf("parents of tipset[%d] were not tipset[%d]", bi-1, bi)
}
out = append(out, nts)
cur = nts
}
return out, nil
}
func (bs *BlockSync) GetBlock(ctx context.Context, c cid.Cid) (*types.BlockHeader, error) {
sb, err := bs.bserv.GetBlock(ctx, c)
if err != nil {
return nil, err
}
return types.DecodeBlock(sb.RawData())
}
func (bs *BlockSync) AddPeer(p peer.ID) {
bs.syncPeers.addPeer(p)
}
func (bs *BlockSync) RemovePeer(p peer.ID) {
bs.syncPeers.removePeer(p)
}
func (bs *BlockSync) getPeers() []peer.ID {
return bs.syncPeers.prefSortedPeers()
}
func (bs *BlockSync) FetchMessagesByCids(ctx context.Context, cids []cid.Cid) ([]*types.Message, error) {
out := make([]*types.Message, len(cids))
err := bs.fetchCids(ctx, cids, func(i int, b blocks.Block) error {
msg, err := types.DecodeMessage(b.RawData())
if err != nil {
return err
}
if out[i] != nil {
return fmt.Errorf("received duplicate message")
}
out[i] = msg
return nil
})
if err != nil {
return nil, err
}
return out, nil
}
func (bs *BlockSync) FetchSignedMessagesByCids(ctx context.Context, cids []cid.Cid) ([]*types.SignedMessage, error) {
out := make([]*types.SignedMessage, len(cids))
err := bs.fetchCids(ctx, cids, func(i int, b blocks.Block) error {
smsg, err := types.DecodeSignedMessage(b.RawData())
if err != nil {
return err
}
if out[i] != nil {
return fmt.Errorf("received duplicate message")
}
out[i] = smsg
return nil
})
if err != nil {
return nil, err
}
return out, nil
}
func (bs *BlockSync) fetchCids(ctx context.Context, cids []cid.Cid, cb func(int, blocks.Block) error) error {
resp := bs.bserv.GetBlocks(context.TODO(), cids)
m := make(map[cid.Cid]int)
for i, c := range cids {
m[c] = i
}
for i := 0; i < len(cids); i++ {
select {
case v, ok := <-resp:
if !ok {
if i == len(cids)-1 {
break
}
return fmt.Errorf("failed to fetch all messages")
}
ix, ok := m[v.Cid()]
if !ok {
return fmt.Errorf("received message we didnt ask for")
}
if err := cb(ix, v); err != nil {
return err
}
}
}
return nil
}
type peerStats struct {
successes int
failures int
firstSeen time.Time
}
type bsPeerTracker struct {
peers map[peer.ID]*peerStats
lk sync.Mutex
}
func newPeerTracker() *bsPeerTracker {
return &bsPeerTracker{
peers: make(map[peer.ID]*peerStats),
}
}
func (bpt *bsPeerTracker) addPeer(p peer.ID) {
bpt.lk.Lock()
defer bpt.lk.Unlock()
if _, ok := bpt.peers[p]; ok {
return
}
bpt.peers[p] = &peerStats{
firstSeen: time.Now(),
}
}
func (bpt *bsPeerTracker) prefSortedPeers() []peer.ID {
// TODO: this could probably be cached, but as long as its not too many peers, fine for now
bpt.lk.Lock()
defer bpt.lk.Unlock()
out := make([]peer.ID, 0, len(bpt.peers))
for p := range bpt.peers {
out = append(out, p)
}
sort.Slice(out, func(i, j int) bool {
pi := bpt.peers[out[i]]
pj := bpt.peers[out[j]]
if pi.successes > pj.successes {
return true
}
if pi.failures < pj.successes {
return true
}
return pi.firstSeen.Before(pj.firstSeen)
})
return out
}
func (bpt *bsPeerTracker) logSuccess(p peer.ID) {
bpt.lk.Lock()
defer bpt.lk.Unlock()
if pi, ok := bpt.peers[p]; !ok {
log.Warn("log success called on peer not in tracker")
return
} else {
pi.successes++
}
}
func (bpt *bsPeerTracker) logFailure(p peer.ID) {
bpt.lk.Lock()
defer bpt.lk.Unlock()
if pi, ok := bpt.peers[p]; !ok {
log.Warn("log failure called on peer not in tracker")
return
} else {
pi.failures++
}
}
func (bpt *bsPeerTracker) removePeer(p peer.ID) {
bpt.lk.Lock()
defer bpt.lk.Unlock()
delete(bpt.peers, p)
}

1
go.mod
View File

@ -45,6 +45,7 @@ require (
github.com/libp2p/go-libp2p-connmgr v0.1.0 github.com/libp2p/go-libp2p-connmgr v0.1.0
github.com/libp2p/go-libp2p-core v0.2.2 github.com/libp2p/go-libp2p-core v0.2.2
github.com/libp2p/go-libp2p-discovery v0.1.0 github.com/libp2p/go-libp2p-discovery v0.1.0
github.com/libp2p/go-libp2p-host v0.1.0
github.com/libp2p/go-libp2p-kad-dht v0.1.1 github.com/libp2p/go-libp2p-kad-dht v0.1.1
github.com/libp2p/go-libp2p-mplex v0.2.1 github.com/libp2p/go-libp2p-mplex v0.2.1
github.com/libp2p/go-libp2p-peer v0.2.0 github.com/libp2p/go-libp2p-peer v0.2.0

2
go.sum
View File

@ -305,6 +305,8 @@ github.com/libp2p/go-libp2p-crypto v0.1.0 h1:k9MFy+o2zGDNGsaoZl0MA3iZ75qXxr9OOoA
github.com/libp2p/go-libp2p-crypto v0.1.0/go.mod h1:sPUokVISZiy+nNuTTH/TY+leRSxnFj/2GLjtOTW90hI= github.com/libp2p/go-libp2p-crypto v0.1.0/go.mod h1:sPUokVISZiy+nNuTTH/TY+leRSxnFj/2GLjtOTW90hI=
github.com/libp2p/go-libp2p-discovery v0.1.0 h1:j+R6cokKcGbnZLf4kcNwpx6mDEUPF3N6SrqMymQhmvs= github.com/libp2p/go-libp2p-discovery v0.1.0 h1:j+R6cokKcGbnZLf4kcNwpx6mDEUPF3N6SrqMymQhmvs=
github.com/libp2p/go-libp2p-discovery v0.1.0/go.mod h1:4F/x+aldVHjHDHuX85x1zWoFTGElt8HnoDzwkFZm29g= github.com/libp2p/go-libp2p-discovery v0.1.0/go.mod h1:4F/x+aldVHjHDHuX85x1zWoFTGElt8HnoDzwkFZm29g=
github.com/libp2p/go-libp2p-host v0.1.0 h1:OZwENiFm6JOK3YR5PZJxkXlJE8a5u8g4YvAUrEV2MjM=
github.com/libp2p/go-libp2p-host v0.1.0/go.mod h1:5+fWuLbDn8OxoxPN3CV0vsLe1hAKScSMbT84qRfxum8=
github.com/libp2p/go-libp2p-kad-dht v0.1.1 h1:IH6NQuoUv5w5e1O8Jc3KyVDtr0rNd0G9aaADpLI1xVo= github.com/libp2p/go-libp2p-kad-dht v0.1.1 h1:IH6NQuoUv5w5e1O8Jc3KyVDtr0rNd0G9aaADpLI1xVo=
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github.com/libp2p/go-libp2p-kbucket v0.2.0 h1:FB2a0VkOTNGTP5gu/I444u4WabNM9V1zCkQcWb7zajI= github.com/libp2p/go-libp2p-kbucket v0.2.0 h1:FB2a0VkOTNGTP5gu/I444u4WabNM9V1zCkQcWb7zajI=