stores: Simplify remote copy buf size logic

extern/sector-storage/stores/remote.go

@@ -3,7 +3,6 @@ package stores
 import (
 	"context"
 	"encoding/json"
-	"fmt"
 	"io"
 	"io/ioutil"
 	"math/bits"
@@ -24,12 +23,13 @@ import (
 	"github.com/filecoin-project/specs-storage/storage"
 
 	"github.com/hashicorp/go-multierror"
-	files "github.com/ipfs/go-ipfs-files"
 	"golang.org/x/xerrors"
 )
 
 var FetchTempSubdir = "fetching"
 
+var CopyBuf = 1 << 20
+
 type Remote struct {
 	local *Local
 	index SectorIndex
@@ -61,30 +61,6 @@ func NewRemote(local *Local, index SectorIndex, auth http.Header, fetchLimit int
 	}
 }
 
-var SealProofIosizes = map[abi.RegisteredSealProof]uint64{
-	abi.RegisteredSealProof_StackedDrg2KiBV1:   32 * 1024,
-	abi.RegisteredSealProof_StackedDrg8MiBV1:   32 * 1024,
-	abi.RegisteredSealProof_StackedDrg512MiBV1: 1024 * 1024,
-	abi.RegisteredSealProof_StackedDrg32GiBV1:  1024 * 1024,
-	abi.RegisteredSealProof_StackedDrg64GiBV1:  1024 * 1024,
-
-	abi.RegisteredSealProof_StackedDrg2KiBV1_1:   32 * 1024,
-	abi.RegisteredSealProof_StackedDrg8MiBV1_1:   32 * 1024,
-	abi.RegisteredSealProof_StackedDrg512MiBV1_1: 1024 * 1024,
-	abi.RegisteredSealProof_StackedDrg32GiBV1_1:  1024 * 1024,
-	abi.RegisteredSealProof_StackedDrg64GiBV1_1:  1024 * 1024,
-}
-
-const MaxIoSize = 64 * 1024 * 1024
-
-func GetIoSizeByProofType(p abi.RegisteredSealProof) (uint64, error) {
-	size, ok := SealProofIosizes[p]
-	if !ok {
-		return 0, xerrors.Errorf("unsupported proof type: %v", p)
-	}
-	return size, nil
-}
-
 func (r *Remote) AcquireSector(ctx context.Context, s storage.SectorRef, existing storiface.SectorFileType, allocate storiface.SectorFileType, pathType storiface.PathType, op storiface.AcquireMode) (storiface.SectorPaths, storiface.SectorPaths, error) {
 	if existing|allocate != existing^allocate {
 		return storiface.SectorPaths{}, storiface.SectorPaths{}, xerrors.New("can't both find and allocate a sector")
@@ -149,12 +125,6 @@ func (r *Remote) AcquireSector(ctx context.Context, s storage.SectorRef, existin
 	}
 	defer releaseStorage()
 
-	var iosize uint64 = 0
-	ssize, err := GetIoSizeByProofType(s.ProofType)
-	if err == nil {
-		iosize = ssize
-	}
-
 	for _, fileType := range storiface.PathTypes {
 		if fileType&existing == 0 {
 			continue
@@ -167,7 +137,7 @@ func (r *Remote) AcquireSector(ctx context.Context, s storage.SectorRef, existin
 		dest := storiface.PathByType(apaths, fileType)
 		storageID := storiface.PathByType(ids, fileType)
 
-		url, err := r.acquireFromRemote(ctx, s.ID, fileType, dest, iosize)
+		url, err := r.acquireFromRemote(ctx, s.ID, fileType, dest)
 		if err != nil {
 			return storiface.SectorPaths{}, storiface.SectorPaths{}, err
 		}
@@ -202,7 +172,7 @@ func tempFetchDest(spath string, create bool) (string, error) {
 	return filepath.Join(tempdir, b), nil
 }
 
-func (r *Remote) acquireFromRemote(ctx context.Context, s abi.SectorID, fileType storiface.SectorFileType, dest string, iosize uint64) (string, error) {
+func (r *Remote) acquireFromRemote(ctx context.Context, s abi.SectorID, fileType storiface.SectorFileType, dest string) (string, error) {
 	si, err := r.index.StorageFindSector(ctx, s, fileType, 0, false)
 	if err != nil {
 		return "", err
@@ -230,7 +200,7 @@ func (r *Remote) acquireFromRemote(ctx context.Context, s abi.SectorID, fileType
 				return "", xerrors.Errorf("removing dest: %w", err)
 			}
 
-			err = r.fetch(ctx, url, tempDest, iosize)
+			err = r.fetch(ctx, url, tempDest)
 			if err != nil {
 				merr = multierror.Append(merr, xerrors.Errorf("fetch error %s (storage %s) -> %s: %w", url, info.ID, tempDest, err))
 				continue
@@ -250,7 +220,7 @@ func (r *Remote) acquireFromRemote(ctx context.Context, s abi.SectorID, fileType
 	return "", xerrors.Errorf("failed to acquire sector %v from remote (tried %v): %w", s, si, merr)
 }
 
-func (r *Remote) fetch(ctx context.Context, url, outname string, iosize uint64) error {
+func (r *Remote) fetch(ctx context.Context, url, outname string) error {
 	log.Infof("Fetch %s -> %s", url, outname)
 
 	if len(r.limit) >= cap(r.limit) {
@@ -308,54 +278,18 @@ func (r *Remote) fetch(ctx context.Context, url, outname string, iosize uint64)
 	case "application/x-tar":
 		return tarutil.ExtractTar(resp.Body, outname)
 	case "application/octet-stream":
-		return WriteWithSize(files.NewReaderFile(resp.Body), outname, iosize)
-	default:
-		return xerrors.Errorf("unknown content type: '%s'", mediatype)
-	}
-}
-
-func WriteWithSize(nd files.Node, fpath string, size uint64) error {
-	switch nd := nd.(type) {
-	case *files.Symlink:
-		return os.Symlink(nd.Target, fpath)
-	case files.File:
-		f, err := os.Create(fpath)
-		defer func() {
-			err = f.Close()
-			if err != nil {
-				log.Warnf("failed to close file:%v, err:%v", fpath, err)
-			}
-		}()
+		f, err := os.Create(outname)
+		defer f.Close()
 		if err != nil {
 			return err
 		}
-		if size <= 0 || size > MaxIoSize {
-			_, err = io.Copy(f, nd)
-		} else {
-			buf := make([]byte, size)
-			_, err = io.CopyBuffer(f, nd, buf)
-		}
-
+		_, err = io.CopyBuffer(f, resp.Body, make([]byte, CopyBuf))
 		if err != nil {
 			return err
 		}
 		return nil
-	case files.Directory:
-		err := os.Mkdir(fpath, 0777)
-		if err != nil {
-			return err
-		}
-
-		entries := nd.Entries()
-		for entries.Next() {
-			child := filepath.Join(fpath, entries.Name())
-			if err := WriteWithSize(entries.Node(), child, size); err != nil {
-				return err
-			}
-		}
-		return entries.Err()
 	default:
-		return fmt.Errorf("file type %T at %q is not supported", nd, fpath)
+		return xerrors.Errorf("unknown content type: '%s'", mediatype)
 	}
 }