Merge pull request #1527 from AudriusButkevicius/protochanges

Cherry-picks

Godeps/Godeps.json

@@ -31,7 +31,7 @@
 		},
 		{
 			"ImportPath": "github.com/syncthing/protocol",
-			"Rev": "f9132cae85dcda1caba2f4ba78996d348b00ac6c"
+			"Rev": "6277c0595c18d42e9db75dfe900463ef093a82d2"
 		},
 		{
 			"ImportPath": "github.com/syndtr/goleveldb/leveldb",

Godeps/_workspace/src/github.com/syncthing/protocol/common_test.go

@@ -13,6 +13,9 @@ type TestModel struct {
 	name     string
 	offset   int64
 	size     int
+	hash     []byte
+	flags    uint32
+	options  []Option
 	closedCh chan bool
 }
 
@@ -22,17 +25,20 @@ func newTestModel() *TestModel {
 	}
 }
 
-func (t *TestModel) Index(deviceID DeviceID, folder string, files []FileInfo) {
+func (t *TestModel) Index(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
 }
 
-func (t *TestModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo) {
+func (t *TestModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
 }
 
-func (t *TestModel) Request(deviceID DeviceID, folder, name string, offset int64, size int) ([]byte, error) {
+func (t *TestModel) Request(deviceID DeviceID, folder, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error) {
 	t.folder = folder
 	t.name = name
 	t.offset = offset
 	t.size = size
+	t.hash = hash
+	t.flags = flags
+	t.options = options
 	return t.data, nil
 }
 

Godeps/_workspace/src/github.com/syncthing/protocol/errors.go

@@ -0,0 +1,51 @@
+// Copyright (C) 2014 The Protocol Authors.
+
+package protocol
+
+import (
+	"errors"
+)
+
+const (
+	ecNoError int32 = iota
+	ecGeneric
+	ecNoSuchFile
+	ecInvalid
+)
+
+var (
+	ErrNoError    error = nil
+	ErrGeneric          = errors.New("generic error")
+	ErrNoSuchFile       = errors.New("no such file")
+	ErrInvalid          = errors.New("file is invalid")
+)
+
+var lookupError = map[int32]error{
+	ecNoError:    ErrNoError,
+	ecGeneric:    ErrGeneric,
+	ecNoSuchFile: ErrNoSuchFile,
+	ecInvalid:    ErrInvalid,
+}
+
+var lookupCode = map[error]int32{
+	ErrNoError:    ecNoError,
+	ErrGeneric:    ecGeneric,
+	ErrNoSuchFile: ecNoSuchFile,
+	ErrInvalid:    ecInvalid,
+}
+
+func codeToError(errcode int32) error {
+	err, ok := lookupError[errcode]
+	if !ok {
+		return ErrGeneric
+	}
+	return err
+}
+
+func errorToCode(err error) int32 {
+	code, ok := lookupCode[err]
+	if !ok {
+		return ecGeneric
+	}
+	return code
+}

Godeps/_workspace/src/github.com/syncthing/protocol/message.go

@@ -1,5 +1,6 @@
 // Copyright (C) 2014 The Protocol Authors.
 
+//go:generate -command genxdr go run ../syncthing/Godeps/_workspace/src/github.com/calmh/xdr/cmd/genxdr/main.go
 //go:generate genxdr -o message_xdr.go message.go
 
 package protocol
@@ -79,7 +80,7 @@ type RequestMessage struct {
 
 type ResponseMessage struct {
 	Data []byte
-	Error int32
+	Code int32
 }
 
 type ClusterConfigMessage struct {

Godeps/_workspace/src/github.com/syncthing/protocol/message_xdr.go

@@ -465,13 +465,13 @@ ResponseMessage Structure:
 \                    Data (variable length)                     \
 /                                                               /
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-|                             Error                             |
+|                             Code                              |
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 
 
 struct ResponseMessage {
 	opaque Data<>;
-	int Error;
+	int Code;
 }
 
 */
@@ -502,7 +502,7 @@ func (o ResponseMessage) AppendXDR(bs []byte) ([]byte, error) {
 
 func (o ResponseMessage) EncodeXDRInto(xw *xdr.Writer) (int, error) {
 	xw.WriteBytes(o.Data)
-	xw.WriteUint32(uint32(o.Error))
+	xw.WriteUint32(uint32(o.Code))
 	return xw.Tot(), xw.Error()
 }
 
@@ -519,7 +519,7 @@ func (o *ResponseMessage) UnmarshalXDR(bs []byte) error {
 
 func (o *ResponseMessage) DecodeXDRFrom(xr *xdr.Reader) error {
 	o.Data = xr.ReadBytes()
-	o.Error = int32(xr.ReadUint32())
+	o.Code = int32(xr.ReadUint32())
 	return xr.Error()
 }
 

Godeps/_workspace/src/github.com/syncthing/protocol/nativemodel_darwin.go

@@ -12,23 +12,23 @@ type nativeModel struct {
 	next Model
 }
 
-func (m nativeModel) Index(deviceID DeviceID, folder string, files []FileInfo) {
+func (m nativeModel) Index(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
 	for i := range files {
 		files[i].Name = norm.NFD.String(files[i].Name)
 	}
-	m.next.Index(deviceID, folder, files)
+	m.next.Index(deviceID, folder, files, flags, options)
 }
 
-func (m nativeModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo) {
+func (m nativeModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
 	for i := range files {
 		files[i].Name = norm.NFD.String(files[i].Name)
 	}
-	m.next.IndexUpdate(deviceID, folder, files)
+	m.next.IndexUpdate(deviceID, folder, files, flags, options)
 }
 
-func (m nativeModel) Request(deviceID DeviceID, folder string, name string, offset int64, size int) ([]byte, error) {
+func (m nativeModel) Request(deviceID DeviceID, folder string, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error) {
 	name = norm.NFD.String(name)
-	return m.next.Request(deviceID, folder, name, offset, size)
+	return m.next.Request(deviceID, folder, name, offset, size, hash, flags, options)
 }
 
 func (m nativeModel) ClusterConfig(deviceID DeviceID, config ClusterConfigMessage) {

Godeps/_workspace/src/github.com/syncthing/protocol/nativemodel_unix.go

@@ -10,16 +10,16 @@ type nativeModel struct {
 	next Model
 }
 
-func (m nativeModel) Index(deviceID DeviceID, folder string, files []FileInfo) {
+func (m nativeModel) Index(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
-	m.next.Index(deviceID, folder, files)
+	m.next.Index(deviceID, folder, files, flags, options)
 }
 
-func (m nativeModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo) {
+func (m nativeModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
-	m.next.IndexUpdate(deviceID, folder, files)
+	m.next.IndexUpdate(deviceID, folder, files, flags, options)
 }
 
-func (m nativeModel) Request(deviceID DeviceID, folder string, name string, offset int64, size int) ([]byte, error) {
+func (m nativeModel) Request(deviceID DeviceID, folder string, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error) {
-	return m.next.Request(deviceID, folder, name, offset, size)
+	return m.next.Request(deviceID, folder, name, offset, size, hash, flags, options)
 }
 
 func (m nativeModel) ClusterConfig(deviceID DeviceID, config ClusterConfigMessage) {

Godeps/_workspace/src/github.com/syncthing/protocol/nativemodel_windows.go

@@ -24,23 +24,30 @@ type nativeModel struct {
 	next Model
 }
 
-func (m nativeModel) Index(deviceID DeviceID, folder string, files []FileInfo) {
+func (m nativeModel) Index(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
-	for i, f := range files {
+	fixupFiles(files)
-		if strings.ContainsAny(f.Name, disallowedCharacters) {
+	m.next.Index(deviceID, folder, files, flags, options)
-			if f.IsDeleted() {
-				// Don't complain if the file is marked as deleted, since it
-				// can't possibly exist here anyway.
-				continue
-			}
-			files[i].Flags |= FlagInvalid
-			l.Warnf("File name %q contains invalid characters; marked as invalid.", f.Name)
-		}
-		files[i].Name = filepath.FromSlash(f.Name)
-	}
-	m.next.Index(deviceID, folder, files)
 }
 
-func (m nativeModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo) {
+func (m nativeModel) IndexUpdate(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option) {
+	fixupFiles(files)
+	m.next.IndexUpdate(deviceID, folder, files, flags, options)
+}
+
+func (m nativeModel) Request(deviceID DeviceID, folder string, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error) {
+	name = filepath.FromSlash(name)
+	return m.next.Request(deviceID, folder, name, offset, size, hash, flags, options)
+}
+
+func (m nativeModel) ClusterConfig(deviceID DeviceID, config ClusterConfigMessage) {
+	m.next.ClusterConfig(deviceID, config)
+}
+
+func (m nativeModel) Close(deviceID DeviceID, err error) {
+	m.next.Close(deviceID, err)
+}
+
+func fixupFiles(files []FileInfo) {
 	for i, f := range files {
 		if strings.ContainsAny(f.Name, disallowedCharacters) {
 			if f.IsDeleted() {
@@ -53,18 +60,4 @@ func (m nativeModel) IndexUpdate(deviceID DeviceID, folder string, files []FileI
 		}
 		files[i].Name = filepath.FromSlash(files[i].Name)
 	}
-	m.next.IndexUpdate(deviceID, folder, files)
-}
-
-func (m nativeModel) Request(deviceID DeviceID, folder string, name string, offset int64, size int) ([]byte, error) {
-	name = filepath.FromSlash(name)
-	return m.next.Request(deviceID, folder, name, offset, size)
-}
-
-func (m nativeModel) ClusterConfig(deviceID DeviceID, config ClusterConfigMessage) {
-	m.next.ClusterConfig(deviceID, config)
-}
-
-func (m nativeModel) Close(deviceID DeviceID, err error) {
-	m.next.Close(deviceID, err)
 }

Godeps/_workspace/src/github.com/syncthing/protocol/protocol.go

@@ -35,6 +35,7 @@ const (
 	stateIdxRcvd
 )
 
+// FileInfo flags
 const (
 	FlagDeleted              uint32 = 1 << 12
 	FlagInvalid                     = 1 << 13
@@ -48,6 +49,17 @@ const (
 	SymlinkTypeMask = FlagDirectory | FlagSymlinkMissingTarget
 )
 
+// IndexMessage message flags (for IndexUpdate)
+const (
+	FlagIndexTemporary uint32 = 1 << iota
+)
+
+// Request message flags
+const (
+	FlagRequestTemporary uint32 = 1 << iota
+)
+
+// ClusterConfigMessage.Folders.Devices flags
 const (
 	FlagShareTrusted  uint32 = 1 << 0
 	FlagShareReadOnly        = 1 << 1
@@ -66,11 +78,11 @@ type pongMessage struct{ EmptyMessage }
 
 type Model interface {
 	// An index was received from the peer device
-	Index(deviceID DeviceID, folder string, files []FileInfo)
+	Index(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option)
 	// An index update was received from the peer device
-	IndexUpdate(deviceID DeviceID, folder string, files []FileInfo)
+	IndexUpdate(deviceID DeviceID, folder string, files []FileInfo, flags uint32, options []Option)
 	// A request was made by the peer device
-	Request(deviceID DeviceID, folder string, name string, offset int64, size int) ([]byte, error)
+	Request(deviceID DeviceID, folder string, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error)
 	// A cluster configuration message was received
 	ClusterConfig(deviceID DeviceID, config ClusterConfigMessage)
 	// The peer device closed the connection
@@ -80,9 +92,9 @@ type Model interface {
 type Connection interface {
 	ID() DeviceID
 	Name() string
-	Index(folder string, files []FileInfo) error
+	Index(folder string, files []FileInfo, flags uint32, options []Option) error
-	IndexUpdate(folder string, files []FileInfo) error
+	IndexUpdate(folder string, files []FileInfo, flags uint32, options []Option) error
-	Request(folder string, name string, offset int64, size int) ([]byte, error)
+	Request(folder string, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error)
 	ClusterConfig(config ClusterConfigMessage)
 	Statistics() Statistics
 }
@@ -169,7 +181,7 @@ func (c *rawConnection) Name() string {
 }
 
 // Index writes the list of file information to the connected peer device
-func (c *rawConnection) Index(folder string, idx []FileInfo) error {
+func (c *rawConnection) Index(folder string, idx []FileInfo, flags uint32, options []Option) error {
 	select {
 	case <-c.closed:
 		return ErrClosed
@@ -179,13 +191,15 @@ func (c *rawConnection) Index(folder string, idx []FileInfo) error {
 	c.send(-1, messageTypeIndex, IndexMessage{
 		Folder:  folder,
 		Files:   idx,
+		Flags:   flags,
+		Options: options,
 	})
 	c.idxMut.Unlock()
 	return nil
 }
 
 // IndexUpdate writes the list of file information to the connected peer device as an update
-func (c *rawConnection) IndexUpdate(folder string, idx []FileInfo) error {
+func (c *rawConnection) IndexUpdate(folder string, idx []FileInfo, flags uint32, options []Option) error {
 	select {
 	case <-c.closed:
 		return ErrClosed
@@ -195,13 +209,15 @@ func (c *rawConnection) IndexUpdate(folder string, idx []FileInfo) error {
 	c.send(-1, messageTypeIndexUpdate, IndexMessage{
 		Folder:  folder,
 		Files:   idx,
+		Flags:   flags,
+		Options: options,
 	})
 	c.idxMut.Unlock()
 	return nil
 }
 
 // Request returns the bytes for the specified block after fetching them from the connected peer.
-func (c *rawConnection) Request(folder string, name string, offset int64, size int) ([]byte, error) {
+func (c *rawConnection) Request(folder string, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error) {
 	var id int
 	select {
 	case id = <-c.nextID:
@@ -222,6 +238,9 @@ func (c *rawConnection) Request(folder string, name string, offset int64, size i
 		Name:    name,
 		Offset:  offset,
 		Size:    int32(size),
+		Hash:    hash,
+		Flags:   flags,
+		Options: options,
 	})
 	if !ok {
 		return nil, ErrClosed
@@ -280,11 +299,6 @@ func (c *rawConnection) readerLoop() (err error) {
 
 		switch msg := msg.(type) {
 		case IndexMessage:
-			if msg.Flags != 0 {
-				// We don't currently support or expect any flags.
-				return fmt.Errorf("protocol error: unknown flags 0x%x in Index(Update) message", msg.Flags)
-			}
-
 			switch hdr.msgType {
 			case messageTypeIndex:
 				if c.state < stateCCRcvd {
@@ -301,10 +315,6 @@ func (c *rawConnection) readerLoop() (err error) {
 			}
 
 		case RequestMessage:
-			if msg.Flags != 0 {
-				// We don't currently support or expect any flags.
-				return fmt.Errorf("protocol error: unknown flags 0x%x in Request message", msg.Flags)
-			}
 			if c.state < stateIdxRcvd {
 				return fmt.Errorf("protocol error: request message in state %d", c.state)
 			}
@@ -460,16 +470,16 @@ func (c *rawConnection) readMessage() (hdr header, msg encodable, err error) {
 
 func (c *rawConnection) handleIndex(im IndexMessage) {
 	if debug {
-		l.Debugf("Index(%v, %v, %d files)", c.id, im.Folder, len(im.Files))
+		l.Debugf("Index(%v, %v, %d file, flags %x, opts: %s)", c.id, im.Folder, len(im.Files), im.Flags, im.Options)
 	}
-	c.receiver.Index(c.id, im.Folder, filterIndexMessageFiles(im.Files))
+	c.receiver.Index(c.id, im.Folder, filterIndexMessageFiles(im.Files), im.Flags, im.Options)
 }
 
 func (c *rawConnection) handleIndexUpdate(im IndexMessage) {
 	if debug {
-		l.Debugf("queueing IndexUpdate(%v, %v, %d files)", c.id, im.Folder, len(im.Files))
+		l.Debugf("queueing IndexUpdate(%v, %v, %d files, flags %x, opts: %s)", c.id, im.Folder, len(im.Files), im.Flags, im.Options)
 	}
-	c.receiver.IndexUpdate(c.id, im.Folder, filterIndexMessageFiles(im.Files))
+	c.receiver.IndexUpdate(c.id, im.Folder, filterIndexMessageFiles(im.Files), im.Flags, im.Options)
 }
 
 func filterIndexMessageFiles(fs []FileInfo) []FileInfo {
@@ -499,10 +509,11 @@ func filterIndexMessageFiles(fs []FileInfo) []FileInfo {
 }
 
 func (c *rawConnection) handleRequest(msgID int, req RequestMessage) {
-	data, _ := c.receiver.Request(c.id, req.Folder, req.Name, int64(req.Offset), int(req.Size))
+	data, err := c.receiver.Request(c.id, req.Folder, req.Name, int64(req.Offset), int(req.Size), req.Hash, req.Flags, req.Options)
 
 	c.send(msgID, messageTypeResponse, ResponseMessage{
 		Data: data,
+		Code: errorToCode(err),
 	})
 }
 
@@ -510,7 +521,7 @@ func (c *rawConnection) handleResponse(msgID int, resp ResponseMessage) {
 	c.awaitingMut.Lock()
 	if rc := c.awaiting[msgID]; rc != nil {
 		c.awaiting[msgID] = nil
-		rc <- asyncResult{resp.Data, nil}
+		rc <- asyncResult{resp.Data, codeToError(resp.Code)}
 		close(rc)
 	}
 	c.awaitingMut.Unlock()

Godeps/_workspace/src/github.com/syncthing/protocol/protocol_test.go

@@ -229,10 +229,10 @@ func TestClose(t *testing.T) {
 		t.Error("Ping should not return true")
 	}
 
-	c0.Index("default", nil)
+	c0.Index("default", nil, 0, nil)
-	c0.Index("default", nil)
+	c0.Index("default", nil, 0, nil)
 
-	if _, err := c0.Request("default", "foo", 0, 0); err == nil {
+	if _, err := c0.Request("default", "foo", 0, 0, nil, 0, nil); err == nil {
 		t.Error("Request should return an error")
 	}
 }

Godeps/_workspace/src/github.com/syncthing/protocol/wireformat.go

@@ -20,7 +20,7 @@ func (c wireFormatConnection) Name() string {
 	return c.next.Name()
 }
 
-func (c wireFormatConnection) Index(folder string, fs []FileInfo) error {
+func (c wireFormatConnection) Index(folder string, fs []FileInfo, flags uint32, options []Option) error {
 	var myFs = make([]FileInfo, len(fs))
 	copy(myFs, fs)
 
@@ -28,10 +28,10 @@ func (c wireFormatConnection) Index(folder string, fs []FileInfo) error {
 		myFs[i].Name = norm.NFC.String(filepath.ToSlash(myFs[i].Name))
 	}
 
-	return c.next.Index(folder, myFs)
+	return c.next.Index(folder, myFs, flags, options)
 }
 
-func (c wireFormatConnection) IndexUpdate(folder string, fs []FileInfo) error {
+func (c wireFormatConnection) IndexUpdate(folder string, fs []FileInfo, flags uint32, options []Option) error {
 	var myFs = make([]FileInfo, len(fs))
 	copy(myFs, fs)
 
@@ -39,12 +39,12 @@ func (c wireFormatConnection) IndexUpdate(folder string, fs []FileInfo) error {
 		myFs[i].Name = norm.NFC.String(filepath.ToSlash(myFs[i].Name))
 	}
 
-	return c.next.IndexUpdate(folder, myFs)
+	return c.next.IndexUpdate(folder, myFs, flags, options)
 }
 
-func (c wireFormatConnection) Request(folder, name string, offset int64, size int) ([]byte, error) {
+func (c wireFormatConnection) Request(folder, name string, offset int64, size int, hash []byte, flags uint32, options []Option) ([]byte, error) {
 	name = norm.NFC.String(filepath.ToSlash(name))
-	return c.next.Request(folder, name, offset, size)
+	return c.next.Request(folder, name, offset, size, hash, flags, options)
 }
 
 func (c wireFormatConnection) ClusterConfig(config ClusterConfigMessage) {

cmd/syncthing/main.go

@@ -533,7 +533,7 @@ func syncthingMain() {
 			if device == myID {
 				continue
 			}
-			m.Index(device, folderCfg.ID, nil)
+			m.Index(device, folderCfg.ID, nil, 0, nil)
 		}
 	}
 

internal/model/model.go

@@ -85,9 +85,6 @@ type Model struct {
 }
 
 var (
-	ErrNoSuchFile = errors.New("no such file")
-	ErrInvalid    = errors.New("file is invalid")
-
 	SymlinkWarning = sync.Once{}
 )
 
@@ -423,7 +420,12 @@ func (m *Model) NeedFolderFiles(folder string, max int) ([]db.FileInfoTruncated,
 
 // Index is called when a new device is connected and we receive their full index.
 // Implements the protocol.Model interface.
-func (m *Model) Index(deviceID protocol.DeviceID, folder string, fs []protocol.FileInfo) {
+func (m *Model) Index(deviceID protocol.DeviceID, folder string, fs []protocol.FileInfo, flags uint32, options []protocol.Option) {
+	if flags != 0 {
+		l.Warnln("protocol error: unknown flags 0x%x in Index message", flags)
+		return
+	}
+
 	if debug {
 		l.Debugf("IDX(in): %s %q: %d files", deviceID, folder, len(fs))
 	}
@@ -475,7 +477,12 @@ func (m *Model) Index(deviceID protocol.DeviceID, folder string, fs []protocol.F
 
 // IndexUpdate is called for incremental updates to connected devices' indexes.
 // Implements the protocol.Model interface.
-func (m *Model) IndexUpdate(deviceID protocol.DeviceID, folder string, fs []protocol.FileInfo) {
+func (m *Model) IndexUpdate(deviceID protocol.DeviceID, folder string, fs []protocol.FileInfo, flags uint32, options []protocol.Option) {
+	if flags != 0 {
+		l.Warnln("protocol error: unknown flags 0x%x in IndexUpdate message", flags)
+		return
+	}
+
 	if debug {
 		l.Debugf("%v IDXUP(in): %s / %q: %d files", m, deviceID, folder, len(fs))
 	}
@@ -672,14 +679,19 @@ func (m *Model) Close(device protocol.DeviceID, err error) {
 
 // Request returns the specified data segment by reading it from local disk.
 // Implements the protocol.Model interface.
-func (m *Model) Request(deviceID protocol.DeviceID, folder, name string, offset int64, size int) ([]byte, error) {
+func (m *Model) Request(deviceID protocol.DeviceID, folder, name string, offset int64, size int, hash []byte, flags uint32, options []protocol.Option) ([]byte, error) {
 	if offset < 0 || size < 0 {
-		return nil, ErrNoSuchFile
+		return nil, protocol.ErrNoSuchFile
 	}
 
 	if !m.folderSharedWith(folder, deviceID) {
 		l.Warnf("Request from %s for file %s in unshared folder %q", deviceID, name, folder)
-		return nil, ErrNoSuchFile
+		return nil, protocol.ErrNoSuchFile
+	}
+
+	if flags != 0 {
+		// We don't currently support or expect any flags.
+		return nil, fmt.Errorf("protocol error: unknown flags 0x%x in Request message", flags)
 	}
 
 	// Verify that the requested file exists in the local model.
@@ -689,26 +701,26 @@ func (m *Model) Request(deviceID protocol.DeviceID, folder, name string, offset
 
 	if !ok {
 		l.Warnf("Request from %s for file %s in nonexistent folder %q", deviceID, name, folder)
-		return nil, ErrNoSuchFile
+		return nil, protocol.ErrNoSuchFile
 	}
 
 	lf, ok := folderFiles.Get(protocol.LocalDeviceID, name)
 	if !ok {
-		return nil, ErrNoSuchFile
+		return nil, protocol.ErrNoSuchFile
 	}
 
 	if lf.IsInvalid() || lf.IsDeleted() {
 		if debug {
 			l.Debugf("%v REQ(in): %s: %q / %q o=%d s=%d; invalid: %v", m, deviceID, folder, name, offset, size, lf)
 		}
-		return nil, ErrInvalid
+		return nil, protocol.ErrInvalid
 	}
 
 	if offset > lf.Size() {
 		if debug {
 			l.Debugf("%v REQ(in; nonexistent): %s: %q o=%d s=%d", m, deviceID, name, offset, size)
 		}
-		return nil, ErrNoSuchFile
+		return nil, protocol.ErrNoSuchFile
 	}
 
 	if debug && deviceID != protocol.LocalDeviceID {
@@ -975,7 +987,7 @@ func sendIndexTo(initial bool, minLocalVer int64, conn protocol.Connection, fold
 
 		if len(batch) == indexBatchSize || currentBatchSize > indexTargetSize {
 			if initial {
-				if err = conn.Index(folder, batch); err != nil {
+				if err = conn.Index(folder, batch, 0, nil); err != nil {
 					return false
 				}
 				if debug {
@@ -983,7 +995,7 @@ func sendIndexTo(initial bool, minLocalVer int64, conn protocol.Connection, fold
 				}
 				initial = false
 			} else {
-				if err = conn.IndexUpdate(folder, batch); err != nil {
+				if err = conn.IndexUpdate(folder, batch, 0, nil); err != nil {
 					return false
 				}
 				if debug {
@@ -1001,12 +1013,12 @@ func sendIndexTo(initial bool, minLocalVer int64, conn protocol.Connection, fold
 	})
 
 	if initial && err == nil {
-		err = conn.Index(folder, batch)
+		err = conn.Index(folder, batch, 0, nil)
 		if debug && err == nil {
 			l.Debugf("sendIndexes for %s-%s/%q: %d files (small initial index)", deviceID, name, folder, len(batch))
 		}
 	} else if len(batch) > 0 && err == nil {
-		err = conn.IndexUpdate(folder, batch)
+		err = conn.IndexUpdate(folder, batch, 0, nil)
 		if debug && err == nil {
 			l.Debugf("sendIndexes for %s-%s/%q: %d files (last batch)", deviceID, name, folder, len(batch))
 		}
@@ -1029,7 +1041,7 @@ func (m *Model) updateLocal(folder string, f protocol.FileInfo) {
 	})
 }
 
-func (m *Model) requestGlobal(deviceID protocol.DeviceID, folder, name string, offset int64, size int, hash []byte) ([]byte, error) {
+func (m *Model) requestGlobal(deviceID protocol.DeviceID, folder, name string, offset int64, size int, hash []byte, flags uint32, options []protocol.Option) ([]byte, error) {
 	m.pmut.RLock()
 	nc, ok := m.protoConn[deviceID]
 	m.pmut.RUnlock()
@@ -1039,10 +1051,10 @@ func (m *Model) requestGlobal(deviceID protocol.DeviceID, folder, name string, o
 	}
 
 	if debug {
-		l.Debugf("%v REQ(out): %s: %q / %q o=%d s=%d h=%x", m, deviceID, folder, name, offset, size, hash)
+		l.Debugf("%v REQ(out): %s: %q / %q o=%d s=%d h=%x f=%x op=%s", m, deviceID, folder, name, offset, size, hash, flags, options)
 	}
 
-	return nc.Request(folder, name, offset, size)
+	return nc.Request(folder, name, offset, size, hash, flags, options)
 }
 
 func (m *Model) AddFolder(cfg config.FolderConfiguration) {

internal/model/model_test.go

@@ -94,7 +94,7 @@ func TestRequest(t *testing.T) {
 	m.ScanFolder("default")
 
 	// Existing, shared file
-	bs, err := m.Request(device1, "default", "foo", 0, 6)
+	bs, err := m.Request(device1, "default", "foo", 0, 6, nil, 0, nil)
 	if err != nil {
 		t.Error(err)
 	}
@@ -103,7 +103,7 @@ func TestRequest(t *testing.T) {
 	}
 
 	// Existing, nonshared file
-	bs, err = m.Request(device2, "default", "foo", 0, 6)
+	bs, err = m.Request(device2, "default", "foo", 0, 6, nil, 0, nil)
 	if err == nil {
 		t.Error("Unexpected nil error on insecure file read")
 	}
@@ -112,7 +112,7 @@ func TestRequest(t *testing.T) {
 	}
 
 	// Nonexistent file
-	bs, err = m.Request(device1, "default", "nonexistent", 0, 6)
+	bs, err = m.Request(device1, "default", "nonexistent", 0, 6, nil, 0, nil)
 	if err == nil {
 		t.Error("Unexpected nil error on insecure file read")
 	}
@@ -121,7 +121,7 @@ func TestRequest(t *testing.T) {
 	}
 
 	// Shared folder, but disallowed file name
-	bs, err = m.Request(device1, "default", "../walk.go", 0, 6)
+	bs, err = m.Request(device1, "default", "../walk.go", 0, 6, nil, 0, nil)
 	if err == nil {
 		t.Error("Unexpected nil error on insecure file read")
 	}
@@ -130,7 +130,7 @@ func TestRequest(t *testing.T) {
 	}
 
 	// Larger block than available
-	bs, err = m.Request(device1, "default", "foo", 0, 42)
+	bs, err = m.Request(device1, "default", "foo", 0, 42, nil, 0, nil)
 	if err == nil {
 		t.Error("Unexpected nil error on insecure file read")
 	}
@@ -139,7 +139,7 @@ func TestRequest(t *testing.T) {
 	}
 
 	// Negative offset
-	bs, err = m.Request(device1, "default", "foo", -4, 6)
+	bs, err = m.Request(device1, "default", "foo", -4, 6, nil, 0, nil)
 	if err == nil {
 		t.Error("Unexpected nil error on insecure file read")
 	}
@@ -148,7 +148,7 @@ func TestRequest(t *testing.T) {
 	}
 
 	// Negative size
-	bs, err = m.Request(device1, "default", "foo", 4, -4)
+	bs, err = m.Request(device1, "default", "foo", 4, -4, nil, 0, nil)
 	if err == nil {
 		t.Error("Unexpected nil error on insecure file read")
 	}
@@ -180,7 +180,7 @@ func BenchmarkIndex10000(b *testing.B) {
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		m.Index(device1, "default", files)
+		m.Index(device1, "default", files, 0, nil)
 	}
 }
 
@@ -193,7 +193,7 @@ func BenchmarkIndex00100(b *testing.B) {
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		m.Index(device1, "default", files)
+		m.Index(device1, "default", files, 0, nil)
 	}
 }
 
@@ -203,11 +203,11 @@ func BenchmarkIndexUpdate10000f10000(b *testing.B) {
 	m.AddFolder(defaultFolderConfig)
 	m.ScanFolder("default")
 	files := genFiles(10000)
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		m.IndexUpdate(device1, "default", files)
+		m.IndexUpdate(device1, "default", files, 0, nil)
 	}
 }
 
@@ -217,12 +217,12 @@ func BenchmarkIndexUpdate10000f00100(b *testing.B) {
 	m.AddFolder(defaultFolderConfig)
 	m.ScanFolder("default")
 	files := genFiles(10000)
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	ufiles := genFiles(100)
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		m.IndexUpdate(device1, "default", ufiles)
+		m.IndexUpdate(device1, "default", ufiles, 0, nil)
 	}
 }
 
@@ -232,12 +232,12 @@ func BenchmarkIndexUpdate10000f00001(b *testing.B) {
 	m.AddFolder(defaultFolderConfig)
 	m.ScanFolder("default")
 	files := genFiles(10000)
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	ufiles := genFiles(1)
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		m.IndexUpdate(device1, "default", ufiles)
+		m.IndexUpdate(device1, "default", ufiles, 0, nil)
 	}
 }
 
@@ -262,15 +262,15 @@ func (f FakeConnection) Option(string) string {
 	return ""
 }
 
-func (FakeConnection) Index(string, []protocol.FileInfo) error {
+func (FakeConnection) Index(string, []protocol.FileInfo, uint32, []protocol.Option) error {
 	return nil
 }
 
-func (FakeConnection) IndexUpdate(string, []protocol.FileInfo) error {
+func (FakeConnection) IndexUpdate(string, []protocol.FileInfo, uint32, []protocol.Option) error {
 	return nil
 }
 
-func (f FakeConnection) Request(folder, name string, offset int64, size int) ([]byte, error) {
+func (f FakeConnection) Request(folder, name string, offset int64, size int, hash []byte, flags uint32, options []protocol.Option) ([]byte, error) {
 	return f.requestData, nil
 }
 
@@ -306,11 +306,11 @@ func BenchmarkRequest(b *testing.B) {
 		requestData: []byte("some data to return"),
 	}
 	m.AddConnection(fc, fc)
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		data, err := m.requestGlobal(device1, "default", files[i%n].Name, 0, 32, nil)
+		data, err := m.requestGlobal(device1, "default", files[i%n].Name, 0, 32, nil, 0, nil)
 		if err != nil {
 			b.Error(err)
 		}
@@ -564,7 +564,7 @@ func TestRefuseUnknownBits(t *testing.T) {
 			Name:  "valid",
 			Flags: protocol.FlagsAll &^ (protocol.FlagInvalid | protocol.FlagSymlink),
 		},
-	})
+	}, 0, nil)
 
 	for _, name := range []string{"invalid1", "invalid2", "invalid3"} {
 		f, ok := m.CurrentGlobalFile("default", name)
@@ -666,7 +666,7 @@ func TestGlobalDirectoryTree(t *testing.T) {
 		return string(bytes)
 	}
 
-	m.Index(device1, "default", testdata)
+	m.Index(device1, "default", testdata, 0, nil)
 
 	result := m.GlobalDirectoryTree("default", "", -1, false)
 
@@ -925,7 +925,7 @@ func TestGlobalDirectorySelfFixing(t *testing.T) {
 		return string(bytes)
 	}
 
-	m.Index(device1, "default", testdata)
+	m.Index(device1, "default", testdata, 0, nil)
 
 	result := m.GlobalDirectoryTree("default", "", -1, false)
 
@@ -996,7 +996,7 @@ func BenchmarkTree_10000_50(b *testing.B) {
 	m.ScanFolder("default")
 	files := genDeepFiles(10000, 50)
 
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
@@ -1011,7 +1011,7 @@ func BenchmarkTree_10000_10(b *testing.B) {
 	m.ScanFolder("default")
 	files := genDeepFiles(10000, 10)
 
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
@@ -1026,7 +1026,7 @@ func BenchmarkTree_00100_50(b *testing.B) {
 	m.ScanFolder("default")
 	files := genDeepFiles(100, 50)
 
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
@@ -1041,7 +1041,7 @@ func BenchmarkTree_00100_10(b *testing.B) {
 	m.ScanFolder("default")
 	files := genDeepFiles(100, 10)
 
-	m.Index(device1, "default", files)
+	m.Index(device1, "default", files, 0, nil)
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {

internal/model/rwfolder.go

@@ -708,9 +708,9 @@ func (p *rwFolder) handleFile(file protocol.FileInfo, copyChan chan<- copyBlocks
 		tempCopyBlocks, _ := scanner.BlockDiff(tempBlocks, file.Blocks)
 
 		// block.String() returns a string unique to the block
-		existingBlocks := make(map[string]bool, len(tempCopyBlocks))
+		existingBlocks := make(map[string]struct{}, len(tempCopyBlocks))
 		for _, block := range tempCopyBlocks {
-			existingBlocks[block.String()] = true
+			existingBlocks[block.String()] = struct{}{}
 		}
 
 		// Since the blocks are already there, we don't need to get them.
@@ -918,7 +918,7 @@ func (p *rwFolder) pullerRoutine(in <-chan pullBlockState, out chan<- *sharedPul
 			// Fetch the block, while marking the selected device as in use so that
 			// leastBusy can select another device when someone else asks.
 			activity.using(selected)
-			buf, lastError := p.model.requestGlobal(selected, p.folder, state.file.Name, state.block.Offset, int(state.block.Size), state.block.Hash)
+			buf, lastError := p.model.requestGlobal(selected, p.folder, state.file.Name, state.block.Offset, int(state.block.Size), state.block.Hash, 0, nil)
 			activity.done(selected)
 			if lastError != nil {
 				continue