lib/db: Various polish (#5471)

naming: buf -> keyBuf
dedup: use getFileTrunc
manually inline insertFile

lib/db/instance.go

@@ -50,7 +50,8 @@ func (db *instance) updateFiles(folder, device []byte, fs []protocol.FileInfo, m
 		}
 		meta.addFile(devID, f)
 
-		t.insertFile(dk, folder, device, f)
+		l.Debugf("insert; folder=%q device=%v %v", folder, devID, f)
+		t.Put(dk, mustMarshal(&f))
 
 		gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
 		keyBuf, _ = t.updateGlobal(gk, keyBuf, folder, device, f, meta)
@@ -156,7 +157,7 @@ func (db *instance) withAllFolderTruncated(folder []byte, fn func(device []byte,
 	dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateDeviceFileKey(nil, folder, nil, nil).WithoutNameAndDevice()), nil)
 	defer dbi.Release()
 
-	var gk, buf []byte
+	var gk, keyBuf []byte
 	for dbi.Next() {
 		device, ok := db.keyer.DeviceFromDeviceFileKey(dbi.Key())
 		if !ok {
@@ -181,7 +182,7 @@ func (db *instance) withAllFolderTruncated(folder []byte, fn func(device []byte,
 			l.Infof("Dropping invalid filename %q from database", f.Name)
 			name := []byte(f.Name)
 			gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
-			buf = t.removeFromGlobal(gk, buf, folder, device, name, nil)
+			keyBuf = t.removeFromGlobal(gk, keyBuf, folder, device, name, nil)
 			t.Delete(dbi.Key())
 			t.checkFlush()
 			continue
@@ -326,15 +327,8 @@ func (db *instance) withNeed(folder, device []byte, truncate bool, fn Iterator)
 			}
 
 			dk = db.keyer.GenerateDeviceFileKey(dk, folder, vl.Versions[i].Device, name)
-			bs, err := t.Get(dk, nil)
-			if err != nil {
-				l.Debugln("surprise error:", err)
-				continue
-			}
-
-			gf, err := unmarshalTrunc(bs, truncate)
-			if err != nil {
-				l.Debugln("unmarshal error:", err)
+			gf, ok := t.getFileTrunc(dk, truncate)
+			if !ok {
 				continue
 			}
 
@@ -362,11 +356,11 @@ func (db *instance) withNeedLocal(folder []byte, truncate bool, fn Iterator) {
 	dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateNeedFileKey(nil, folder, nil).WithoutName()), nil)
 	defer dbi.Release()
 
-	var buf []byte
+	var keyBuf []byte
 	var f FileIntf
 	var ok bool
 	for dbi.Next() {
-		buf, f, ok = t.getGlobal(buf, folder, db.keyer.NameFromGlobalVersionKey(dbi.Key()), truncate)
+		keyBuf, f, ok = t.getGlobal(keyBuf, folder, db.keyer.NameFromGlobalVersionKey(dbi.Key()), truncate)
 		if !ok {
 			continue
 		}
@@ -401,11 +395,11 @@ func (db *instance) dropDeviceFolder(device, folder []byte, meta *metadataTracke
 	dbi := t.NewIterator(util.BytesPrefix(db.keyer.GenerateDeviceFileKey(nil, folder, device, nil)), nil)
 	defer dbi.Release()
 
-	var gk, buf []byte
+	var gk, keyBuf []byte
 	for dbi.Next() {
 		name := db.keyer.NameFromDeviceFileKey(dbi.Key())
 		gk = db.keyer.GenerateGlobalVersionKey(gk, folder, name)
-		buf = t.removeFromGlobal(gk, buf, folder, device, name, meta)
+		keyBuf = t.removeFromGlobal(gk, keyBuf, folder, device, name, meta)
 		t.Delete(dbi.Key())
 		t.checkFlush()
 	}

lib/db/meta.go

@@ -272,12 +272,12 @@ func (m *metadataTracker) Counts(dev protocol.DeviceID, flag uint32) Counts {
 	return m.counts.Counts[idx]
 }
 
-// nextSeq allocates a new sequence number for the given device
-func (m *metadataTracker) nextSeq(dev protocol.DeviceID) int64 {
+// nextLocalSeq allocates a new local sequence number
+func (m *metadataTracker) nextLocalSeq() int64 {
 	m.mut.Lock()
 	defer m.mut.Unlock()
 
-	c := m.countsPtr(dev, 0)
+	c := m.countsPtr(protocol.LocalDeviceID, 0)
 	c.Sequence++
 	return c.Sequence
 }

lib/db/set.go

@@ -163,12 +163,12 @@ func (s *FileSet) Update(device protocol.DeviceID, fs []protocol.FileInfo) {
 	fs = fs[:0]
 	folder := []byte(s.folder)
 	for _, nf := range oldFs {
-		ef, ok := s.db.getFileDirty(folder, device[:], []byte(osutil.NormalizedFilename(nf.Name)))
+		ef, ok := s.db.getFileDirty(folder, device[:], []byte(nf.Name))
 		if ok && unchanged(nf, ef) {
 			continue
 		}
 
-		nf.Sequence = s.meta.nextSeq(protocol.LocalDeviceID)
+		nf.Sequence = s.meta.nextLocalSeq()
 		fs = append(fs, nf)
 
 		if ok {

lib/db/transactions.go

@@ -119,12 +119,6 @@ func (t readWriteTransaction) flush() {
 	}
 }
 
-func (t readWriteTransaction) insertFile(fk, folder, device []byte, file protocol.FileInfo) {
-	l.Debugf("insert; folder=%q device=%v %v", folder, protocol.DeviceIDFromBytes(device), file)
-
-	t.Put(fk, mustMarshal(&file))
-}
-
 // updateGlobal adds this device+version to the version list for the given
 // file. If the device is already present in the list, the version is updated.
 // If the file does not have an entry in the global list, it is created.