provider/lpffi/piece_funcs.go

@@ -65,3 +65,7 @@ func (sb *SealCalls) WritePiece(ctx context.Context, pieceID storiface.PieceNumb
 	removeTemp = false
 	return nil
 }
+
+func (sb *SealCalls) PieceReader(ctx context.Context, id storiface.PieceNumber) (io.ReadCloser, error) {
+	return sb.sectors.storage.ReaderSeq(ctx, id.Ref(), storiface.FTPiece)
+}

provider/lpffi/sdr_funcs.go

@@ -42,7 +42,7 @@ type SealCalls struct {
 	externCalls ExternalSealer*/
 }
 
-func NewSealCalls(st paths.Store, ls *paths.Local, si paths.SectorIndex) *SealCalls {
+func NewSealCalls(st *paths.Remote, ls *paths.Local, si paths.SectorIndex) *SealCalls {
 	return &SealCalls{
 		sectors: &storageProvider{
 			storage:             st,
@@ -54,7 +54,7 @@ func NewSealCalls(st paths.Store, ls *paths.Local, si paths.SectorIndex) *SealCa
 }
 
 type storageProvider struct {
-	storage             paths.Store
+	storage             *paths.Remote
 	localStore          *paths.Local
 	sindex              paths.SectorIndex
 	storageReservations *xsync.MapOf[harmonytask.TaskID, *StorageReservation]

provider/lpseal/task_trees.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"io"
 	"net/http"
+	"net/url"
+	"strconv"
 
 	"github.com/ipfs/go-cid"
 	"golang.org/x/xerrors"
@@ -88,6 +90,15 @@ func (t *TreesTask) Do(taskID harmonytask.TaskID, stillOwned func() bool) (done
 	var dataReader io.Reader
 	var unpaddedData bool
 
+	var closers []io.Closer
+	defer func() {
+		for _, c := range closers {
+			if err := c.Close(); err != nil {
+				log.Errorw("error closing piece reader", "error", err)
+			}
+		}
+	}()
+
 	if len(pieces) > 0 {
 		pieceInfos := make([]abi.PieceInfo, len(pieces))
 		pieceReaders := make([]io.Reader, len(pieces))
@@ -106,10 +117,49 @@ func (t *TreesTask) Do(taskID harmonytask.TaskID, stillOwned func() bool) (done
 
 			// make pieceReader
 			if p.DataUrl != nil {
-				pieceReaders[i], _ = padreader.New(&UrlPieceReader{
-					Url:     *p.DataUrl,
-					RawSize: *p.DataRawSize,
-				}, uint64(*p.DataRawSize))
+				dataUrl := *p.DataUrl
+
+				goUrl, err := url.Parse(dataUrl)
+				if err != nil {
+					return false, xerrors.Errorf("parsing data URL: %w", err)
+				}
+
+				if goUrl.Scheme == "pieceref" {
+					// url is to a piece reference
+
+					refNum, err := strconv.ParseInt(goUrl.Opaque, 10, 64)
+					if err != nil {
+						return false, xerrors.Errorf("parsing piece reference number: %w", err)
+					}
+
+					// get pieceID
+					var pieceID []struct {
+						PieceID storiface.PieceNumber `db:"piece_id"`
+					}
+					err = t.db.Select(ctx, &pieceID, `SELECT piece_id FROM parked_piece_refs WHERE ref_id = $1`, refNum)
+					if err != nil {
+						return false, xerrors.Errorf("getting pieceID: %w", err)
+					}
+
+					if len(pieceID) != 1 {
+						return false, xerrors.Errorf("expected 1 pieceID, got %d", len(pieceID))
+					}
+
+					pr, err := t.sc.PieceReader(ctx, pieceID[0].PieceID)
+					if err != nil {
+						return false, xerrors.Errorf("getting piece reader: %w", err)
+					}
+
+					closers = append(closers, pr)
+
+					pieceReaders[i], _ = padreader.New(pr, uint64(*p.DataRawSize))
+				} else {
+					pieceReaders[i], _ = padreader.New(&UrlPieceReader{
+						Url:     dataUrl,
+						RawSize: *p.DataRawSize,
+					}, uint64(*p.DataRawSize))
+				}
+
 			} else { // padding piece (w/o fr32 padding, added in TreeD)
 				pieceReaders[i] = nullreader.NewNullReader(abi.PaddedPieceSize(p.PieceSize).Unpadded())
 			}

storage/paths/remote.go

@@ -747,6 +747,46 @@ func (r *Remote) Reader(ctx context.Context, s storiface.SectorRef, offset, size
 	return nil, nil
 }
 
+func (r *Remote) ReaderSeq(ctx context.Context, s storiface.SectorRef, ft storiface.SectorFileType) (io.ReadCloser, error) {
+	paths, _, err := r.local.AcquireSector(ctx, s, ft, storiface.FTNone, storiface.PathStorage, storiface.AcquireMove)
+	if err != nil {
+		return nil, xerrors.Errorf("acquire local: %w", err)
+	}
+
+	path := storiface.PathByType(paths, ft)
+	if path != "" {
+		return os.Open(path)
+	}
+
+	si, err := r.index.StorageFindSector(ctx, s.ID, ft, 0, false)
+	if err != nil {
+		log.Debugf("Reader, did not find file on any of the workers %s (%s)", path, ft.String())
+		return nil, err
+	}
+
+	if len(si) == 0 {
+		return nil, xerrors.Errorf("failed to read sector %v from remote(%d): %w", s, ft, storiface.ErrSectorNotFound)
+	}
+
+	sort.Slice(si, func(i, j int) bool {
+		return si[i].Weight > si[j].Weight
+	})
+
+	for _, info := range si {
+		for _, url := range info.URLs {
+			rd, err := r.readRemote(ctx, url, 0, 0)
+			if err != nil {
+				log.Warnw("reading from remote", "url", url, "error", err)
+				continue
+			}
+
+			return rd, err
+		}
+	}
+
+	return nil, xerrors.Errorf("failed to read sector %v from remote(%d): %w", s, ft, storiface.ErrSectorNotFound)
+}
+
 func (r *Remote) Reserve(ctx context.Context, sid storiface.SectorRef, ft storiface.SectorFileType, storageIDs storiface.SectorPaths, overheadTab map[storiface.SectorFileType]int) (func(), error) {
 	log.Warnf("reserve called on remote store, sectorID: %v", sid.ID)
 	return func() {