properly handle partial sync responses

chain/blocksync/blocksync_client.go

@@ -105,7 +105,7 @@ func (bs *BlockSync) GetBlocks(ctx context.Context, tsk types.TipSetKey, count i
 			continue
 		}
 
-		if res.Status == 0 {
+		if res.Status == StatusOK || res.Status == StatusPartial {
 			resp, err := bs.processBlocksResponse(req, res)
 			if err != nil {
 				return nil, xerrors.Errorf("success response from peer failed to process: %w", err)
@@ -114,6 +114,7 @@ func (bs *BlockSync) GetBlocks(ctx context.Context, tsk types.TipSetKey, count i
 			bs.host.ConnManager().TagPeer(p, "bsync", 25)
 			return resp, nil
 		}
+
 		oerr = bs.processStatus(req, res)
 		if oerr != nil {
 			log.Warnf("BlockSync peer %s response was an error: %s", p.String(), oerr)
@@ -145,7 +146,7 @@ func (bs *BlockSync) GetFullTipSet(ctx context.Context, p peer.ID, tsk types.Tip
 
 		return bstsToFullTipSet(bts)
 	case 101: // Partial Response
-		return nil, xerrors.Errorf("partial responses are not handled")
+		return nil, xerrors.Errorf("partial responses are not handled for single tipset fetching")
 	case 201: // req.Start not found
 		return nil, fmt.Errorf("not found")
 	case 202: // Go Away
@@ -185,7 +186,7 @@ func (bs *BlockSync) GetChainMessages(ctx context.Context, h *types.TipSet, coun
 	req := &BlockSyncRequest{
 		Start:         h.Cids(),
 		RequestLength: count,
-		Options:       BSOptMessages | BSOptBlocks,
+		Options:       BSOptMessages,
 	}
 
 	var err error
@@ -205,8 +206,8 @@ func (bs *BlockSync) GetChainMessages(ctx context.Context, h *types.TipSet, coun
 		}
 
 		if res.Status == StatusPartial {
-			log.Warn("dont yet handle partial responses")
-			continue
+			// TODO: track partial response sizes to ensure we don't overrequest too often
+			return res.Chain, nil
 		}
 
 		err = bs.processStatus(req, res)

chain/sync.go

@@ -321,7 +321,7 @@ func zipTipSetAndMessages(bs cbor.IpldStore, ts *types.TipSet, allbmsgs []*types
 		}
 
 		if b.Messages != mrcid {
-			return nil, fmt.Errorf("messages didnt match message root in header")
+			return nil, fmt.Errorf("messages didnt match message root in header for ts %s", ts.Key())
 		}
 
 		fb := &types.FullBlock{
@@ -1133,25 +1133,35 @@ func (syncer *Syncer) iterFullTipsets(ctx context.Context, headers []*types.TipS
 			batchSize = i
 		}
 
-		next := headers[i-batchSize]
-		bstips, err := syncer.Bsync.GetChainMessages(ctx, next, uint64(batchSize+1))
-		if err != nil {
-			return xerrors.Errorf("message processing failed: %w", err)
+		nextI := (i + 1) - batchSize // want to fetch batchSize values, 'i' points to last one we want to fetch, so its 'inclusive' of our request, thus we need to add one to our request start index
+
+		var bstout []*blocksync.BSTipSet
+		for len(bstout) < batchSize {
+			next := headers[nextI]
+
+			nreq := batchSize - len(bstout)
+			bstips, err := syncer.Bsync.GetChainMessages(ctx, next, uint64(nreq))
+			if err != nil {
+				return xerrors.Errorf("message processing failed: %w", err)
+			}
+
+			bstout = append(bstout, bstips...)
+			nextI += len(bstips)
 		}
 
-		for bsi := 0; bsi < len(bstips); bsi++ {
+		for bsi := 0; bsi < len(bstout); bsi++ {
 			// temp storage so we don't persist data we dont want to
 			ds := dstore.NewMapDatastore()
 			bs := bstore.NewBlockstore(ds)
 			blks := cbor.NewCborStore(bs)
 
 			this := headers[i-bsi]
-			bstip := bstips[len(bstips)-(bsi+1)]
+			bstip := bstout[len(bstout)-(bsi+1)]
 			fts, err := zipTipSetAndMessages(blks, this, bstip.BlsMessages, bstip.SecpkMessages, bstip.BlsMsgIncludes, bstip.SecpkMsgIncludes)
 			if err != nil {
 				log.Warnw("zipping failed", "error", err, "bsi", bsi, "i", i,
 					"height", this.Height(), "bstip-height", bstip.Blocks[0].Height,
-					"bstips", bstips, "next-height", i+batchSize)
+					"next-height", i+batchSize)
 				return xerrors.Errorf("message processing failed: %w", err)
 			}
 
@@ -1167,7 +1177,7 @@ func (syncer *Syncer) iterFullTipsets(ctx context.Context, headers []*types.TipS
 				return xerrors.Errorf("message processing failed: %w", err)
 			}
 		}
-		i -= windowSize
+		i -= batchSize
 	}
 
 	return nil

lib/increadtimeout/incrt.go

@@ -52,7 +52,7 @@ func (crt *incrt) Read(buf []byte) (int, error) {
 
 	err := crt.rd.SetReadDeadline(start.Add(crt.wait))
 	if err != nil {
-		log.Warnf("unable to set daedline: %+v", err)
+		log.Warnf("unable to set deadline: %+v", err)
 	}
 
 	n, err := crt.rd.Read(buf)