add inverted index

cmd/boostd-data/go.mod

@@ -2,6 +2,7 @@ module github.com/filecoin-project/boost/cmd/boostd-data
 
 require (
 	github.com/couchbase/gocb/v2 v2.5.0
+	github.com/davecgh/go-spew v1.1.1
 	github.com/docker/docker v1.4.2-0.20180625184442-8e610b2b55bf
 	github.com/docker/go-connections v0.4.0
 	github.com/ethereum/go-ethereum v1.10.17
@@ -13,6 +14,7 @@ require (
 	github.com/ipfs/go-ds-leveldb v0.5.0
 	github.com/ipfs/go-log/v2 v2.5.0
 	github.com/ipld/go-car/v2 v2.1.1
+	github.com/multiformats/go-multicodec v0.3.1-0.20210902112759-1539a079fd61
 	github.com/multiformats/go-multihash v0.1.0
 	github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7
 	golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d
@@ -46,7 +48,6 @@ require (
 	github.com/multiformats/go-base32 v0.0.3 // indirect
 	github.com/multiformats/go-base36 v0.1.0 // indirect
 	github.com/multiformats/go-multibase v0.0.3 // indirect
-	github.com/multiformats/go-multicodec v0.3.1-0.20210902112759-1539a079fd61 // indirect
 	github.com/multiformats/go-varint v0.0.6 // indirect
 	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/opencontainers/image-spec v1.0.2 // indirect

cmd/boostd-data/ldb/db.go

@@ -9,6 +9,7 @@ import (
 	"github.com/filecoin-project/boost/cmd/boostd-data/model"
 	"github.com/ipfs/go-cid"
 	"github.com/ipfs/go-datastore"
+	ds "github.com/ipfs/go-datastore"
 	"github.com/ipfs/go-datastore/query"
 	"github.com/ipld/go-car/v2/index"
 	"github.com/multiformats/go-multihash"
@@ -18,11 +19,17 @@ var (
 	// LevelDB key value for storing next free cursor.
 	keyNextCursor   uint64 = 0
 	dskeyNextCursor datastore.Key
+
 	// LevelDB key prefix for PieceCid to cursor table.
 	// LevelDB keys will be built by concatenating PieceCid to this prefix.
 	prefixPieceCidToCursor  uint64 = 1
 	sprefixPieceCidToCursor string
 
+	// LevelDB key prefix for Multihash to PieceCids table.
+	// LevelDB keys will be built by concatenating Multihash to this prefix.
+	prefixMhtoPieceCids  uint64 = 2
+	sprefixMhtoPieceCids string
+
 	size    = binary.MaxVarintLen64
 	cutsize = size + 2
 )
@@ -35,6 +42,10 @@ func init() {
 	buf = make([]byte, size)
 	binary.PutUvarint(buf, prefixPieceCidToCursor)
 	sprefixPieceCidToCursor = string(buf)
+
+	buf = make([]byte, size)
+	binary.PutUvarint(buf, prefixMhtoPieceCids)
+	sprefixMhtoPieceCids = string(buf)
 }
 
 // NextCursor
@@ -56,6 +67,83 @@ func (db *DB) SetNextCursor(ctx context.Context, cursor uint64) error {
 	return db.Put(ctx, dskeyNextCursor, buf)
 }
 
+// GetPieceCidsByMultihash
+func (db *DB) GetPieceCidsByMultihash(ctx context.Context, mh multihash.Multihash) ([]cid.Cid, error) {
+	key := datastore.NewKey(fmt.Sprintf("%s%s", sprefixMhtoPieceCids, mh.String()))
+
+	val, err := db.Get(ctx, key)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get value for multihash %s, err: %w", mh, err)
+	}
+
+	var pcids []cid.Cid
+	if err := json.Unmarshal(val, &pcids); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal pieceCids slice: %w", err)
+	}
+
+	return pcids, nil
+}
+
+// SetMultihashToPieceCid
+func (db *DB) SetMultihashToPieceCid(ctx context.Context, mh multihash.Multihash, pieceCid cid.Cid) error {
+	batch, err := db.Batch(ctx)
+	if err != nil {
+		return fmt.Errorf("failed to create ds batch: %w", err)
+	}
+
+	key := datastore.NewKey(fmt.Sprintf("%s%s", sprefixMhtoPieceCids, mh.String()))
+
+	// do we already have an entry for this multihash ?
+	val, err := db.Get(ctx, key)
+	if err != nil && err != ds.ErrNotFound {
+		return fmt.Errorf("failed to get value for multihash %s, err: %w", mh, err)
+	}
+
+	// if we don't have an existing entry for this mh, create one
+	if err == ds.ErrNotFound {
+		v := []cid.Cid{pieceCid}
+		b, err := json.Marshal(v)
+		if err != nil {
+			return fmt.Errorf("failed to marshal pieceCids slice: %w", err)
+		}
+		if err := batch.Put(ctx, key, b); err != nil {
+			return fmt.Errorf("failed to batch put mh=%s, err=%w", mh, err)
+		}
+		return nil
+	}
+
+	// else, append the pieceCid to the existing list
+	var pcids []cid.Cid
+	if err := json.Unmarshal(val, &pcids); err != nil {
+		return fmt.Errorf("failed to unmarshal pieceCids slice: %w", err)
+	}
+
+	// if we already have the pieceCid indexed for the multihash, nothing to do here.
+	if has(pcids, pieceCid) {
+		return nil
+	}
+
+	pcids = append(pcids, pieceCid)
+
+	b, err := json.Marshal(pcids)
+	if err != nil {
+		return fmt.Errorf("failed to marshal pieceCids slice: %w", err)
+	}
+	if err := batch.Put(ctx, key, b); err != nil {
+		return fmt.Errorf("failed to batch put mh=%s, err%w", mh, err)
+	}
+
+	if err := batch.Commit(ctx); err != nil {
+		return fmt.Errorf("failed to commit batch: %w", err)
+	}
+
+	if err := db.Sync(ctx, key); err != nil {
+		return fmt.Errorf("failed to sync puts: %w", err)
+	}
+
+	return nil
+}
+
 // SetPieceCidToMetadata
 func (db *DB) SetPieceCidToMetadata(ctx context.Context, pieceCid cid.Cid, md model.Metadata) error {
 	b, err := json.Marshal(md)
@@ -150,3 +238,12 @@ func (db *DB) GetOffset(ctx context.Context, cursorPrefix string, m multihash.Mu
 	offset, _ := binary.Uvarint(b)
 	return offset, nil
 }
+
+func has(list []cid.Cid, v cid.Cid) bool {
+	for _, l := range list {
+		if l.Equals(v) {
+			return true
+		}
+	}
+	return false
+}

cmd/boostd-data/ldb/service.go

@@ -7,6 +7,7 @@ import (
 	"io/ioutil"
 	"time"
 
+	"github.com/davecgh/go-spew/spew"
 	"github.com/filecoin-project/boost/cmd/boostd-data/model"
 	"github.com/ipfs/go-cid"
 	"github.com/ipfs/go-datastore"
@@ -157,9 +158,8 @@ func (s *PieceMetaService) PiecesContainingMultihash(m mh.Multihash) ([]cid.Cid,
 		log.Debugw("handled.pieces-containing-mh", "took", fmt.Sprintf("%s", time.Since(now)))
 	}(time.Now())
 
-	// TODO: inverted index
-
-	return nil, nil
+	ctx := context.Background()
+	return s.db.GetPieceCidsByMultihash(ctx, m)
 }
 
 func (s *PieceMetaService) AddIndex(pieceCid cid.Cid, records []model.Record) error {
@@ -169,21 +169,30 @@ func (s *PieceMetaService) AddIndex(pieceCid cid.Cid, records []model.Record) er
 		log.Debugw("handled.add-index", "took", fmt.Sprintf("%s", time.Since(now)))
 	}(time.Now())
 
+	ctx := context.Background()
+
 	var recs []carindex.Record
 	for _, r := range records {
 		recs = append(recs, carindex.Record{
 			Cid:    r.Cid,
 			Offset: r.Offset,
 		})
-		//fmt.Println("got r: ", r.Cid, r.Offset)
-	}
-	// --- first  ---:
 
-	// TODO first: see inverted index in dagstore today
+		spew.Dump(r.Cid)
 
-	// --- second ---:
+		// set inverted index, i.e. multihash -> pieceCid
+		dmh, err := multihash.Decode(r.Cid.Bytes())
+		if err != nil {
+			return fmt.Errorf("cannot decode multihash: %w", err)
+		}
 
-	ctx := context.Background()
+		_, mh, err := multihash.MHFromBytes(dmh.Digest)
+		if err != nil {
+			return fmt.Errorf("cannot create multihash from bytes: %w", err)
+		}
+
+		s.db.SetMultihashToPieceCid(ctx, mh, pieceCid)
+	}
 
 	// get and set next cursor (handle synchronization, maybe with CAS)
 	cursor, keyCursorPrefix, err := s.db.NextCursor(ctx)