refactor dagstore + carv2 integration (+).

- Integrate with config.toml.
- Export DAGStore to DI context in preparation for JSON-RPC
  and cli commands.
- Renames.

node/builder.go

@@ -66,6 +66,7 @@ var (
 	AutoNATSvcKey        = special{10} // Libp2p option
 	BandwidthReporterKey = special{11} // Libp2p option
 	ConnGaterKey         = special{12} // libp2p option
+	DAGStoreKey          = special{13} // constructor returns multiple values
 )
 
 type invoke int

node/builder_miner.go

@@ -148,8 +148,8 @@ func ConfigStorageMiner(c interface{}) Option {
 			Override(new(dtypes.RetrievalPricingFunc), modules.RetrievalPricingFunc(cfg.Dealmaking)),
 
 			// DAG Store
-			Override(new(dagstore.MinerAPI), modules.NewLotusAccessor),
-			Override(new(*dagstore.Wrapper), modules.DAGStoreWrapper),
+			Override(new(dagstore.MinerAPI), modules.NewMinerAPI),
+			Override(DAGStoreKey, modules.DAGStore),
 
 			// Markets (retrieval)
 			Override(new(retrievalmarket.RetrievalProviderNode), retrievaladapter.NewRetrievalProviderNode),

node/config/def.go

@@ -188,6 +188,15 @@ func DefaultStorageMiner() *StorageMiner {
 			TerminateControl:   []string{},
 			DealPublishControl: []string{},
 		},
+
+		DAGStore: DAGStoreConfig{
+			// zero value paths for transients, indices, datastore.
+			// by default they'll end up under the node repo.
+			MaxConcurrentIndex:         5,
+			MaxConcurrentReadyFetches:  2,
+			MaxConcurrencyStorageCalls: 100,
+			GCInterval:                 time.Minute,
+		},
 	}
 	cfg.Common.API.ListenAddress = "/ip4/127.0.0.1/tcp/2345/http"
 	cfg.Common.API.RemoteListenAddress = "127.0.0.1:2345"

node/config/types.go

@@ -1,10 +1,11 @@
 package config
 
 import (
-	"github.com/ipfs/go-cid"
+	"time"
 
 	"github.com/filecoin-project/lotus/chain/types"
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
+	"github.com/ipfs/go-cid"
 )
 
 // // NOTE: ONLY PUT STRUCT DEFINITIONS IN THIS FILE
@@ -50,6 +51,17 @@ type StorageMiner struct {
 	Storage    sectorstorage.SealerConfig
 	Fees       MinerFeeConfig
 	Addresses  MinerAddressConfig
+	DAGStore   DAGStoreConfig
+}
+
+type DAGStoreConfig struct {
+	TransientsDir              string
+	IndexDir                   string
+	DatastoreDir               string
+	MaxConcurrentIndex         int
+	MaxConcurrentReadyFetches  int
+	MaxConcurrencyStorageCalls int
+	GCInterval                 time.Duration
 }
 
 type MinerSubsystemConfig struct {

node/impl/client/client.go

@@ -10,8 +10,7 @@ import (
 	"sort"
 	"time"
 
-	"github.com/filecoin-project/go-fil-markets/filestorecaradapter"
-	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
+	"github.com/ipld/go-car"
 	carv2 "github.com/ipld/go-car/v2"
 	"github.com/ipld/go-car/v2/blockstore"
 
@@ -26,7 +25,7 @@ import (
 	files "github.com/ipfs/go-ipfs-files"
 	"github.com/ipfs/go-merkledag"
 	unixfile "github.com/ipfs/go-unixfs/file"
-	"github.com/ipld/go-car"
+
 	basicnode "github.com/ipld/go-ipld-prime/node/basic"
 	"github.com/ipld/go-ipld-prime/traversal/selector"
 	"github.com/ipld/go-ipld-prime/traversal/selector/builder"
@@ -47,6 +46,7 @@ import (
 	"github.com/filecoin-project/go-fil-markets/shared"
 	"github.com/filecoin-project/go-fil-markets/storagemarket"
 	"github.com/filecoin-project/go-fil-markets/storagemarket/network"
+	"github.com/filecoin-project/go-fil-markets/stores"
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/specs-actors/v3/actors/builtin/market"
 
@@ -54,6 +54,7 @@ import (
 
 	"github.com/filecoin-project/lotus/api"
 	"github.com/filecoin-project/lotus/build"
+	"github.com/filecoin-project/lotus/chain/actors/builtin/miner"
 	"github.com/filecoin-project/lotus/chain/store"
 	"github.com/filecoin-project/lotus/chain/types"
 	"github.com/filecoin-project/lotus/markets/utils"
@@ -188,17 +189,17 @@ func (a *API) dealStarter(ctx context.Context, params *api.StartDealParams, isSt
 		providerInfo := utils.NewStorageProviderInfo(params.Miner, mi.Worker, mi.SectorSize, *mi.PeerId, mi.Multiaddrs)
 
 		result, err := a.SMDealClient.ProposeStorageDeal(ctx, storagemarket.ProposeStorageDealParams{
-			Addr:                   params.Wallet,
-			Info:                   &providerInfo,
-			Data:                   params.Data,
-			StartEpoch:             dealStart,
-			EndEpoch:               calcDealExpiration(params.MinBlocksDuration, md, dealStart),
-			Price:                  params.EpochPrice,
-			Collateral:             params.ProviderCollateral,
-			Rt:                     st,
-			FastRetrieval:          params.FastRetrieval,
-			VerifiedDeal:           params.VerifiedDeal,
-			FilestoreCARv2FilePath: CARV2FilePath,
+			Addr:          params.Wallet,
+			Info:          &providerInfo,
+			Data:          params.Data,
+			StartEpoch:    dealStart,
+			EndEpoch:      calcDealExpiration(params.MinBlocksDuration, md, dealStart),
+			Price:         params.EpochPrice,
+			Collateral:    params.ProviderCollateral,
+			Rt:            st,
+			FastRetrieval: params.FastRetrieval,
+			VerifiedDeal:  params.VerifiedDeal,
+			IndexedCAR:    CARV2FilePath,
 		})
 
 		if err != nil {
@@ -519,7 +520,7 @@ func (a *API) ClientImport(ctx context.Context, ref api.FileRef) (res *api.Impor
 			}
 		}()
 
-		root, err = a.importNormalFileToFilestoreCARv2(ctx, id, ref.Path, carFile)
+		root, err = a.doImport(ctx, ref.Path, carFile)
 		if err != nil {
 			return nil, xerrors.Errorf("failed to import normal file to CARv2: %w", err)
 		}
@@ -1031,21 +1032,21 @@ func (w *lenWriter) Write(p []byte) (n int, err error) {
 }
 
 func (a *API) ClientDealSize(ctx context.Context, root cid.Cid) (api.DataSize, error) {
-	fc, err := a.imgr().FilestoreCARV2FilePathFor(root)
+	path, err := a.imgr().FilestoreCARV2FilePathFor(root)
 	if err != nil {
 		return api.DataSize{}, xerrors.Errorf("failed to find CARv2 file for root: %w", err)
 	}
-	if len(fc) == 0 {
+	if len(path) == 0 {
 		return api.DataSize{}, xerrors.New("no CARv2 file for root")
 	}
 
-	rdOnly, err := filestorecaradapter.NewReadOnlyFileStore(fc)
+	fs, err := stores.ReadOnlyFilestore(path)
 	if err != nil {
-		return api.DataSize{}, xerrors.Errorf("failed to open read only filestore: %w", err)
+		return api.DataSize{}, xerrors.Errorf("failed to open filestore from carv2 in path %s: %w", path, err)
 	}
-	defer rdOnly.Close() //nolint:errcheck
+	defer fs.Close() //nolint:errcheck
 
-	dag := merkledag.NewDAGService(blockservice.New(rdOnly, offline.Exchange(rdOnly)))
+	dag := merkledag.NewDAGService(blockservice.New(fs, offline.Exchange(fs)))
 	w := lenWriter(0)
 
 	err = car.WriteCar(ctx, dag, []cid.Cid{root}, &w)
@@ -1062,21 +1063,21 @@ func (a *API) ClientDealSize(ctx context.Context, root cid.Cid) (api.DataSize, e
 }
 
 func (a *API) ClientDealPieceCID(ctx context.Context, root cid.Cid) (api.DataCIDSize, error) {
-	fc, err := a.imgr().FilestoreCARV2FilePathFor(root)
+	path, err := a.imgr().FilestoreCARV2FilePathFor(root)
 	if err != nil {
 		return api.DataCIDSize{}, xerrors.Errorf("failed to find CARv2 file for root: %w", err)
 	}
-	if len(fc) == 0 {
+	if len(path) == 0 {
 		return api.DataCIDSize{}, xerrors.New("no CARv2 file for root")
 	}
 
-	rdOnly, err := filestorecaradapter.NewReadOnlyFileStore(fc)
+	fs, err := stores.ReadOnlyFilestore(path)
 	if err != nil {
-		return api.DataCIDSize{}, xerrors.Errorf("failed to open read only blockstore: %w", err)
+		return api.DataCIDSize{}, xerrors.Errorf("failed to open filestore from carv2 in path %s: %w", path, err)
 	}
-	defer rdOnly.Close() //nolint:errcheck
+	defer fs.Close() //nolint:errcheck
 
-	dag := merkledag.NewDAGService(blockservice.New(rdOnly, offline.Exchange(rdOnly)))
+	dag := merkledag.NewDAGService(blockservice.New(fs, offline.Exchange(fs)))
 	w := &writer.Writer{}
 	bw := bufio.NewWriterSize(w, int(writer.CommPBuf))
 
@@ -1095,22 +1096,20 @@ func (a *API) ClientDealPieceCID(ctx context.Context, root cid.Cid) (api.DataCID
 
 func (a *API) ClientGenCar(ctx context.Context, ref api.FileRef, outputPath string) error {
 	id := importmgr.ImportID(rand.Uint64())
-	tmpCARv2File, err := a.imgr().NewTempFile(id)
+	tmp, err := a.imgr().NewTempFile(id)
 	if err != nil {
 		return xerrors.Errorf("failed to create temp file: %w", err)
 	}
-	defer os.Remove(tmpCARv2File) //nolint:errcheck
+	defer os.Remove(tmp) //nolint:errcheck
 
-	root, err := a.importNormalFileToFilestoreCARv2(ctx, id, ref.Path, tmpCARv2File)
+	root, err := a.doImport(ctx, ref.Path, tmp)
 	if err != nil {
 		return xerrors.Errorf("failed to import normal file to CARv2")
 	}
 
-	// generate a deterministic CARv1 payload from the UnixFS DAG by doing an IPLD
-	// traversal over the Unixfs DAG in the CARv2 file using the "all selector" i.e the entire DAG selector.
-	fs, err := filestorecaradapter.NewReadOnlyFileStore(tmpCARv2File)
+	fs, err := stores.ReadOnlyFilestore(tmp)
 	if err != nil {
-		return xerrors.Errorf("failed to open read only CARv2 blockstore: %w", err)
+		return xerrors.Errorf("failed to open filestore from carv2 in path %s: %w", tmp, err)
 	}
 	defer fs.Close() //nolint:errcheck
 

node/impl/client/import.go

@@ -2,18 +2,14 @@ package client
 
 import (
 	"context"
+	"io/ioutil"
 	"os"
 
-	"github.com/filecoin-project/go-fil-markets/filestorecaradapter"
-	bstore "github.com/filecoin-project/lotus/blockstore"
+	"github.com/filecoin-project/go-fil-markets/stores"
 	"github.com/filecoin-project/lotus/build"
-	"github.com/filecoin-project/lotus/node/repo/importmgr"
 	"github.com/ipfs/go-blockservice"
 	"github.com/ipfs/go-cid"
 	"github.com/ipfs/go-cidutil"
-	"github.com/ipfs/go-datastore"
-	ds_sync "github.com/ipfs/go-datastore/sync"
-	"github.com/ipfs/go-filestore"
 	chunker "github.com/ipfs/go-ipfs-chunker"
 	offline "github.com/ipfs/go-ipfs-exchange-offline"
 	files2 "github.com/ipfs/go-ipfs-files"
@@ -21,56 +17,81 @@ import (
 	"github.com/ipfs/go-merkledag"
 	"github.com/ipfs/go-unixfs/importer/balanced"
 	ihelper "github.com/ipfs/go-unixfs/importer/helpers"
+	"github.com/ipld/go-car/v2"
+	"github.com/ipld/go-car/v2/blockstore"
 	"golang.org/x/xerrors"
 )
 
-// importNormalFileToFilestoreCARv2 transforms the client's "normal file" to a Unixfs IPLD DAG and writes out the DAG to a CARv2 file
-// that can be used to back a filestore.
-func (a *API) importNormalFileToFilestoreCARv2(ctx context.Context, importID importmgr.ImportID, inputFilePath string, outputCARv2Path string) (c cid.Cid, finalErr error) {
-
-	// TODO: We've currently put in a hack to create the Unixfs DAG as a CARv2 without using Badger.
-	// We first create the Unixfs DAG using a filestore to get the root of the Unixfs DAG.
-	// We can't create the UnixfsDAG right away using a CARv2 read-write blockstore as the blockstore
-	// needs the root of the DAG during instantiation to write out a valid CARv2 file.
+// doImport takes a standard file (src), forms a UnixFS DAG, and writes a
+// CARv2 file with positional mapping (backed by the go-filestore library).
+func (a *API) doImport(ctx context.Context, src string, dst string) (cid.Cid, error) {
+	// This method uses a two-phase approach with a staging CAR blockstore and
+	// a final CAR blockstore.
 	//
-	// In the second pass, we create a CARv2 file with the root present using the root node we get in the above step.
-	// This hack should be fixed when CARv2 allows specifying the root AFTER finishing the CARv2 streaming write.
-	fm := filestore.NewFileManager(ds_sync.MutexWrap(datastore.NewMapDatastore()), "/")
-	fm.AllowFiles = true
-	fstore := filestore.NewFilestore(bstore.NewMemorySync(), fm)
+	// This is necessary because of https://github.com/ipld/go-car/issues/196
+	//
+	// TODO: do we need to chunk twice? Isn't the first output already in the
+	//  right order? Can't we just copy the CAR file and replace the header?
+	f, err := ioutil.TempFile("", "")
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("failed to create temp file: %w", err)
+	}
+	_ = f.Close() // close; we only want the path.
+	tmp := f.Name()
+	defer os.Remove(tmp)
+
+	// Step 1. Compute the UnixFS DAG and write it to a CARv2 file to get
+	// the root CID of the DAG.
+	fstore, err := stores.ReadWriteFilestore(tmp)
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("failed to create temporary filestore: %w", err)
+	}
+
 	bsvc := blockservice.New(fstore, offline.Exchange(fstore))
-	defer bsvc.Close() //nolint:errcheck
+	dags := merkledag.NewDAGService(bsvc)
 
-	// ---- First Pass ---  Write out the UnixFS DAG to a rootless CARv2 file by instantiating a read-write CARv2 blockstore without the root.
-	root, err := importNormalFileToUnixfsDAG(ctx, inputFilePath, merkledag.NewDAGService(bsvc))
+	root, err := buildUnixFS(ctx, src, dags)
 	if err != nil {
-		return cid.Undef, xerrors.Errorf("failed to import file to store: %w", err)
+		_ = fstore.Close()
+		return cid.Undef, xerrors.Errorf("failed to import file to store to compute root: %w", err)
 	}
 
-	//------ Second Pass --- Now that we have the root of the Unixfs DAG -> write out the Unixfs DAG to a CARv2 file with the root present by using a
-	// filestore backed by a read-write CARv2 blockstore.
-	fsb, err := filestorecaradapter.NewReadWriteFileStore(outputCARv2Path, []cid.Cid{root})
-	if err != nil {
-		return cid.Undef, xerrors.Errorf("failed to create a CARv2 read-write blockstore: %w", err)
-	}
-	defer fsb.Close() //nolint:errcheck
-
-	bsvc = blockservice.New(fsb, offline.Exchange(fsb))
-	root2, err := importNormalFileToUnixfsDAG(ctx, inputFilePath, merkledag.NewDAGService(bsvc))
-	if err != nil {
-		return cid.Undef, xerrors.Errorf("failed to create Unixfs DAG with CARv2 blockstore: %w", err)
+	if err := fstore.Close(); err != nil {
+		return cid.Undef, xerrors.Errorf("failed to finalize car filestore: %w", err)
 	}
 
-	if root != root2 {
+	// Step 2. We now have the root of the UnixFS DAG, and we can write the
+	// final CAR for real under `dst`.
+	bs, err := blockstore.OpenReadWrite(dst, []cid.Cid{root},
+		car.ZeroLengthSectionAsEOF(true),
+		blockstore.UseWholeCIDs(true))
+	if err != nil {
+		return cid.Undef, xerrors.Errorf("failed to create a carv2 read/write blockstore: %w", err)
+	}
+
+	bsvc = blockservice.New(bs, offline.Exchange(bs))
+	dags = merkledag.NewDAGService(bsvc)
+	finalRoot, err := buildUnixFS(ctx, src, dags)
+	if err != nil {
+		_ = bs.Close()
+		return cid.Undef, xerrors.Errorf("failed to create UnixFS DAG with carv2 blockstore: %w", err)
+	}
+
+	if err := bs.Finalize(); err != nil {
+		return cid.Undef, xerrors.Errorf("failed to finalize car blockstore: %w", err)
+	}
+
+	if root != finalRoot {
 		return cid.Undef, xerrors.New("roots do not match")
 	}
 
 	return root, nil
 }
 
-// importNormalFileToUnixfsDAG transforms a client's normal file to a UnixfsDAG and imports the DAG to the given DAG service.
-func importNormalFileToUnixfsDAG(ctx context.Context, inputFilePath string, dag ipld.DAGService) (cid.Cid, error) {
-	f, err := os.Open(inputFilePath)
+// buildUnixFS builds a UnixFS DAG out of the supplied ordinary file,
+// and imports the DAG into the supplied service.
+func buildUnixFS(ctx context.Context, src string, dag ipld.DAGService) (cid.Cid, error) {
+	f, err := os.Open(src)
 	if err != nil {
 		return cid.Undef, xerrors.Errorf("failed to open input file: %w", err)
 	}
@@ -81,7 +102,7 @@ func importNormalFileToUnixfsDAG(ctx context.Context, inputFilePath string, dag
 		return cid.Undef, xerrors.Errorf("failed to stat file :%w", err)
 	}
 
-	file, err := files2.NewReaderPathFile(inputFilePath, f, stat)
+	file, err := files2.NewReaderPathFile(src, f, stat)
 	if err != nil {
 		return cid.Undef, xerrors.Errorf("failed to create reader path file: %w", err)
 	}

node/impl/client/import_test.go

@@ -4,12 +4,11 @@ import (
 	"context"
 	"io"
 	"io/ioutil"
-	"math/rand"
 	"os"
 	"strings"
 	"testing"
 
-	"github.com/filecoin-project/go-fil-markets/filestorecaradapter"
+	"github.com/filecoin-project/go-fil-markets/stores"
 	"github.com/filecoin-project/lotus/node/repo/importmgr"
 	"github.com/ipfs/go-blockservice"
 	"github.com/ipfs/go-cid"
@@ -22,39 +21,50 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestImportNormalFileToUnixfsDAG(t *testing.T) {
+// This test uses a full "dense" CARv2, and not a filestore (positional mapping).
+func TestRoundtripUnixFS_Dense(t *testing.T) {
 	ctx := context.Background()
-	inputPath, inputContents := genNormalInputFile(t)
+
+	inputPath, inputContents := genInputFile(t)
 	defer os.Remove(inputPath) //nolint:errcheck
-	carv2File := genTmpFile(t)
+
+	carv2File := newTmpFile(t)
 	defer os.Remove(carv2File) //nolint:errcheck
 
-	// import a normal file to a Unixfs DAG using a CARv2 read-write blockstore and flush it out to a CARv2 file.
-	tempCARv2Store, err := blockstore.OpenReadWrite(carv2File, []cid.Cid{}, carv2.ZeroLengthSectionAsEOF(true), blockstore.UseWholeCIDs(true))
+	// import a file to a Unixfs DAG using a CARv2 read/write blockstore.
+	path, err := blockstore.OpenReadWrite(carv2File, nil,
+		carv2.ZeroLengthSectionAsEOF(true),
+		blockstore.UseWholeCIDs(true))
 	require.NoError(t, err)
-	bsvc := blockservice.New(tempCARv2Store, offline.Exchange(tempCARv2Store))
-	root, err := importNormalFileToUnixfsDAG(ctx, inputPath, merkledag.NewDAGService(bsvc))
+
+	bsvc := blockservice.New(path, offline.Exchange(path))
+	dags := merkledag.NewDAGService(bsvc)
+
+	root, err := buildUnixFS(ctx, inputPath, dags)
 	require.NoError(t, err)
 	require.NotEqual(t, cid.Undef, root)
-	require.NoError(t, tempCARv2Store.Finalize())
+	require.NoError(t, path.Finalize())
 
-	// convert the CARv2 file to a normal file again and ensure the contents match.
-	readOnly, err := blockstore.OpenReadOnly(carv2File, carv2.ZeroLengthSectionAsEOF(true), blockstore.UseWholeCIDs(true))
+	// reconstruct the file.
+	readOnly, err := blockstore.OpenReadOnly(carv2File,
+		carv2.ZeroLengthSectionAsEOF(true),
+		blockstore.UseWholeCIDs(true))
 	require.NoError(t, err)
 	defer readOnly.Close() //nolint:errcheck
-	dag := merkledag.NewDAGService(blockservice.New(readOnly, offline.Exchange(readOnly)))
 
-	nd, err := dag.Get(ctx, root)
-	require.NoError(t, err)
-	file, err := unixfile.NewUnixfsFile(ctx, dag, nd)
+	dags = merkledag.NewDAGService(blockservice.New(readOnly, offline.Exchange(readOnly)))
+
+	nd, err := dags.Get(ctx, root)
 	require.NoError(t, err)
 
-	tmpOutput := genTmpFile(t)
+	file, err := unixfile.NewUnixfsFile(ctx, dags, nd)
+	require.NoError(t, err)
+
+	tmpOutput := newTmpFile(t)
 	defer os.Remove(tmpOutput) //nolint:errcheck
 	require.NoError(t, files.WriteTo(file, tmpOutput))
 
 	// ensure contents of the initial input file and the output file are identical.
-
 	fo, err := os.Open(tmpOutput)
 	require.NoError(t, err)
 	bz2, err := ioutil.ReadAll(fo)
@@ -63,35 +73,36 @@ func TestImportNormalFileToUnixfsDAG(t *testing.T) {
 	require.Equal(t, inputContents, bz2)
 }
 
-func TestImportNormalFileToCARv2(t *testing.T) {
+func TestRoundtripUnixFS_Filestore(t *testing.T) {
 	ctx := context.Background()
 	a := &API{
 		Imports: &importmgr.Mgr{},
 	}
-	importID := importmgr.ImportID(rand.Uint64())
 
-	inputFilePath, inputContents := genNormalInputFile(t)
+	inputFilePath, inputContents := genInputFile(t)
 	defer os.Remove(inputFilePath) //nolint:errcheck
 
-	outputCARv2 := genTmpFile(t)
-	defer os.Remove(outputCARv2) //nolint:errcheck
+	path := newTmpFile(t)
+	defer os.Remove(path) //nolint:errcheck
 
-	root, err := a.importNormalFileToFilestoreCARv2(ctx, importID, inputFilePath, outputCARv2)
+	root, err := a.doImport(ctx, inputFilePath, path)
 	require.NoError(t, err)
 	require.NotEqual(t, cid.Undef, root)
 
 	// convert the CARv2 to a normal file again and ensure the contents match
-	readOnly, err := filestorecaradapter.NewReadOnlyFileStore(outputCARv2)
+	fs, err := stores.ReadOnlyFilestore(path)
 	require.NoError(t, err)
-	defer readOnly.Close() //nolint:errcheck
-	dag := merkledag.NewDAGService(blockservice.New(readOnly, offline.Exchange(readOnly)))
+	defer fs.Close() //nolint:errcheck
 
-	nd, err := dag.Get(ctx, root)
-	require.NoError(t, err)
-	file, err := unixfile.NewUnixfsFile(ctx, dag, nd)
+	dags := merkledag.NewDAGService(blockservice.New(fs, offline.Exchange(fs)))
+
+	nd, err := dags.Get(ctx, root)
 	require.NoError(t, err)
 
-	tmpOutput := genTmpFile(t)
+	file, err := unixfile.NewUnixfsFile(ctx, dags, nd)
+	require.NoError(t, err)
+
+	tmpOutput := newTmpFile(t)
 	defer os.Remove(tmpOutput) //nolint:errcheck
 	require.NoError(t, files.WriteTo(file, tmpOutput))
 
@@ -104,14 +115,14 @@ func TestImportNormalFileToCARv2(t *testing.T) {
 	require.Equal(t, inputContents, bz2)
 }
 
-func genTmpFile(t *testing.T) string {
+func newTmpFile(t *testing.T) string {
 	f, err := os.CreateTemp("", "")
 	require.NoError(t, err)
 	require.NoError(t, f.Close())
 	return f.Name()
 }
 
-func genNormalInputFile(t *testing.T) (filepath string, contents []byte) {
+func genInputFile(t *testing.T) (filepath string, contents []byte) {
 	s := strings.Repeat("abcde", 100)
 	tmp, err := os.CreateTemp("", "")
 	require.NoError(t, err)

node/modules/client.go

@@ -182,7 +182,7 @@ func StorageClient(lc fx.Lifecycle, h host.Host, dataTransfer dtypes.ClientDataT
 func RetrievalClient(lc fx.Lifecycle, h host.Host, r repo.LockedRepo, dt dtypes.ClientDataTransfer, payAPI payapi.PaychAPI, resolver discovery.PeerResolver,
 	ds dtypes.MetadataDS, chainAPI full.ChainAPI, stateAPI full.StateAPI, j journal.Journal) (retrievalmarket.RetrievalClient, error) {
 
-	carsPath := filepath.Join(r.Path(), dagStore, "retrieval-cars")
+	carsPath := filepath.Join(r.Path(), DefaultDAGStoreDir, "retrieval-cars")
 
 	if err := os.MkdirAll(carsPath, 0755); err != nil {
 		return nil, xerrors.Errorf("failed to create dir")

node/modules/storageminer.go

@@ -7,9 +7,7 @@ import (
 	"fmt"
 	"net/http"
 	"os"
-	"path"
 	"path/filepath"
-	"strconv"
 	"strings"
 	"time"
 
@@ -17,22 +15,6 @@ import (
 	"go.uber.org/multierr"
 	"golang.org/x/xerrors"
 
-	"github.com/ipfs/go-bitswap"
-	"github.com/ipfs/go-bitswap/network"
-	"github.com/ipfs/go-blockservice"
-	"github.com/ipfs/go-cid"
-	"github.com/ipfs/go-datastore"
-	"github.com/ipfs/go-datastore/namespace"
-	levelds "github.com/ipfs/go-ds-leveldb"
-	measure "github.com/ipfs/go-ds-measure"
-	graphsync "github.com/ipfs/go-graphsync/impl"
-	gsnet "github.com/ipfs/go-graphsync/network"
-	"github.com/ipfs/go-graphsync/storeutil"
-	"github.com/ipfs/go-merkledag"
-	"github.com/libp2p/go-libp2p-core/host"
-	"github.com/libp2p/go-libp2p-core/routing"
-	ldbopts "github.com/syndtr/goleveldb/leveldb/opt"
-
 	"github.com/filecoin-project/go-address"
 	dtimpl "github.com/filecoin-project/go-data-transfer/impl"
 	dtnet "github.com/filecoin-project/go-data-transfer/network"
@@ -52,6 +34,18 @@ import (
 	"github.com/filecoin-project/go-state-types/abi"
 	"github.com/filecoin-project/go-statestore"
 	"github.com/filecoin-project/go-storedcounter"
+	"github.com/ipfs/go-bitswap"
+	"github.com/ipfs/go-bitswap/network"
+	"github.com/ipfs/go-blockservice"
+	"github.com/ipfs/go-cid"
+	"github.com/ipfs/go-datastore"
+	"github.com/ipfs/go-datastore/namespace"
+	graphsync "github.com/ipfs/go-graphsync/impl"
+	gsnet "github.com/ipfs/go-graphsync/network"
+	"github.com/ipfs/go-graphsync/storeutil"
+	"github.com/ipfs/go-merkledag"
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/routing"
 
 	sectorstorage "github.com/filecoin-project/lotus/extern/sector-storage"
 	"github.com/filecoin-project/lotus/extern/sector-storage/ffiwrapper"
@@ -82,7 +76,6 @@ import (
 )
 
 var StorageCounterDSPrefix = "/storage/nextid"
-var dagStore = "dagStore"
 
 func minerAddrFromDS(ds dtypes.MetadataDS) (address.Address, error) {
 	maddrb, err := ds.Get(datastore.NewKey("miner-address"))
@@ -597,7 +590,7 @@ func StorageProvider(minerAddress dtypes.MinerAddress,
 		return nil, err
 	}
 
-	dagStorePath := filepath.Join(r.Path(), dagStore)
+	dagStorePath := filepath.Join(r.Path(), DefaultDAGStoreDir)
 
 	opt := storageimpl.CustomDealDecisionLogic(storageimpl.DealDeciderFunc(df))
 	shardMigrator := storageimpl.NewShardMigrator(address.Address(minerAddress), dagStorePath, dsw, pieceStore, spn)

node/modules/storageminer_dagstore.go

@@ -6,25 +6,39 @@ import (
 	"os"
 	"path/filepath"
 	"strconv"
-	"time"
 
+	"github.com/filecoin-project/dagstore"
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
-	"github.com/filecoin-project/lotus/markets/dagstore"
+	mdagstore "github.com/filecoin-project/lotus/markets/dagstore"
+	"github.com/filecoin-project/lotus/node/config"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
 	"github.com/filecoin-project/lotus/node/repo"
-	"github.com/ipfs/go-datastore"
-	levelds "github.com/ipfs/go-ds-leveldb"
-	measure "github.com/ipfs/go-ds-measure"
-	ldbopts "github.com/syndtr/goleveldb/leveldb/opt"
 	"go.uber.org/fx"
 	"golang.org/x/xerrors"
 )
 
-func NewLotusAccessor(lc fx.Lifecycle,
-	pieceStore dtypes.ProviderPieceStore,
-	rpn retrievalmarket.RetrievalProviderNode,
-) (dagstore.MinerAPI, error) {
-	mountApi := dagstore.NewMinerAPI(pieceStore, rpn)
+const (
+	EnvDAGStoreCopyConcurrency = "LOTUS_DAGSTORE_COPY_CONCURRENCY"
+	DefaultDAGStoreDir         = "dagStore"
+)
+
+// NewMinerAPI creates a new MinerAPI adaptor for the dagstore mounts.
+func NewMinerAPI(lc fx.Lifecycle, r repo.LockedRepo, pieceStore dtypes.ProviderPieceStore, rpn retrievalmarket.RetrievalProviderNode) (mdagstore.MinerAPI, error) {
+	cfg, err := extractDAGStoreConfig(r)
+	if err != nil {
+		return nil, err
+	}
+
+	// caps the amount of concurrent calls to the storage, so that we don't
+	// spam it during heavy processes like bulk migration.
+	if v, ok := os.LookupEnv("LOTUS_DAGSTORE_MOUNT_CONCURRENCY"); ok {
+		concurrency, err := strconv.Atoi(v)
+		if err == nil {
+			cfg.MaxConcurrencyStorageCalls = concurrency
+		}
+	}
+
+	mountApi := mdagstore.NewMinerAPI(pieceStore, rpn, cfg.MaxConcurrencyStorageCalls)
 	ready := make(chan error, 1)
 	pieceStore.OnReady(func(err error) {
 		ready <- err
@@ -44,72 +58,60 @@ func NewLotusAccessor(lc fx.Lifecycle,
 	return mountApi, nil
 }
 
-func DAGStoreWrapper(
-	lc fx.Lifecycle,
-	r repo.LockedRepo,
-	lotusAccessor dagstore.MinerAPI,
-) (*dagstore.Wrapper, error) {
-	dir := filepath.Join(r.Path(), dagStore)
-	ds, err := newDAGStoreDatastore(dir)
+// DAGStore constructs a DAG store using the supplied minerAPI, and the
+// user configuration. It returns both the DAGStore and the Wrapper suitable for
+// passing to markets.
+func DAGStore(lc fx.Lifecycle, r repo.LockedRepo, minerAPI mdagstore.MinerAPI) (*dagstore.DAGStore, *mdagstore.Wrapper, error) {
+	cfg, err := extractDAGStoreConfig(r)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
-	var maxCopies = 2
-	// TODO replace env with config.toml attribute.
-	v, ok := os.LookupEnv("LOTUS_DAGSTORE_COPY_CONCURRENCY")
+	// populate default directories if not explicitly set in the config.
+	defaultDir := filepath.Join(r.Path(), DefaultDAGStoreDir)
+	if cfg.TransientsDir == "" {
+		cfg.TransientsDir = filepath.Join(defaultDir, "transients")
+	}
+	if cfg.IndexDir == "" {
+		cfg.IndexDir = filepath.Join(defaultDir, "index")
+	}
+	if cfg.DatastoreDir == "" {
+		cfg.DatastoreDir = filepath.Join(defaultDir, "datastore")
+	}
+
+	v, ok := os.LookupEnv(EnvDAGStoreCopyConcurrency)
 	if ok {
 		concurrency, err := strconv.Atoi(v)
 		if err == nil {
-			maxCopies = concurrency
+			cfg.MaxConcurrentReadyFetches = concurrency
 		}
 	}
 
-	cfg := dagstore.MarketDAGStoreConfig{
-		TransientsDir:             filepath.Join(dir, "transients"),
-		IndexDir:                  filepath.Join(dir, "index"),
-		Datastore:                 ds,
-		GCInterval:                1 * time.Minute,
-		MaxConcurrentIndex:        5,
-		MaxConcurrentReadyFetches: maxCopies,
-	}
-
-	dsw, err := dagstore.NewWrapper(cfg, lotusAccessor)
+	dagst, w, err := mdagstore.NewDAGStore(cfg, minerAPI)
 	if err != nil {
-		return nil, xerrors.Errorf("failed to create DAG store wrapper: %w", err)
+		return nil, nil, xerrors.Errorf("failed to create DAG store: %w", err)
 	}
 
 	lc.Append(fx.Hook{
 		OnStart: func(ctx context.Context) error {
-			return dsw.Start(ctx)
+			return w.Start(ctx)
 		},
 		OnStop: func(context.Context) error {
-			return dsw.Close()
+			return w.Close()
 		},
 	})
-	return dsw, nil
+
+	return dagst, w, nil
 }
 
-// newDAGStoreDatastore creates a datastore under the given base directory
-// for dagstore metadata.
-func newDAGStoreDatastore(baseDir string) (datastore.Batching, error) {
-	// Create a datastore directory under the base dir if it doesn't already exist
-	dsDir := filepath.Join(baseDir, "datastore")
-	if err := os.MkdirAll(dsDir, 0755); err != nil {
-		return nil, xerrors.Errorf("failed to create directory %s for DAG store datastore: %w", dsDir, err)
-	}
-
-	// Create a new LevelDB datastore
-	ds, err := levelds.NewDatastore(dsDir, &levelds.Options{
-		Compression: ldbopts.NoCompression,
-		NoSync:      false,
-		Strict:      ldbopts.StrictAll,
-		ReadOnly:    false,
-	})
+func extractDAGStoreConfig(r repo.LockedRepo) (config.DAGStoreConfig, error) {
+	cfg, err := r.Config()
 	if err != nil {
-		return nil, xerrors.Errorf("failed to open datastore for DAG store: %w", err)
+		return config.DAGStoreConfig{}, xerrors.Errorf("could not load config: %w", err)
 	}
-	// Keep statistics about the datastore
-	mds := measure.New("measure.", ds)
-	return mds, nil
+	mcfg, ok := cfg.(config.StorageMiner)
+	if !ok {
+		return config.DAGStoreConfig{}, xerrors.Errorf("config not expected type; expected config.StorageMiner, got: %T", cfg)
+	}
+	return mcfg.DAGStore, nil
 }