Remove device-side go code

block_device.go

@@ -25,22 +25,15 @@ func (r remoteImageBackend) ReadAt(p []byte, off int64) (n int, err error) {
 	mountedImageSize := currentVirtualMediaState.Size
 	virtualMediaStateMutex.RUnlock()
 
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	_, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 
 	readLen := int64(len(p))
 	if off+readLen > mountedImageSize {
 		readLen = mountedImageSize - off
 	}
-	var data []byte
+
 	switch source {
-	case WebRTC:
-		data, err = webRTCDiskReader.Read(ctx, off, readLen)
-		if err != nil {
-			return 0, err
-		}
-		n = copy(p, data)
-		return n, nil
 	case HTTP:
 		return httpRangeReader.ReadAt(p, off)
 	default:

fuse.go

@@ -1,114 +0,0 @@
-package kvm
-
-import (
-	"context"
-	"os"
-	"sync"
-	"syscall"
-
-	"github.com/hanwen/go-fuse/v2/fs"
-	"github.com/hanwen/go-fuse/v2/fuse"
-)
-
-type WebRTCStreamFile struct {
-	fs.Inode
-	mu   sync.Mutex
-	Attr fuse.Attr
-	size uint64
-}
-
-var _ = (fs.NodeOpener)((*WebRTCStreamFile)(nil))
-var _ = (fs.NodeOpener)((*WebRTCStreamFile)(nil))
-var _ = (fs.NodeOpener)((*WebRTCStreamFile)(nil))
-var _ = (fs.NodeOpener)((*WebRTCStreamFile)(nil))
-var _ = (fs.NodeOpener)((*WebRTCStreamFile)(nil))
-
-func (f *WebRTCStreamFile) Open(ctx context.Context, flags uint32) (fh fs.FileHandle, fuseFlags uint32, errno syscall.Errno) {
-	return nil, fuse.FOPEN_KEEP_CACHE, fs.OK
-}
-
-func (f *WebRTCStreamFile) Write(ctx context.Context, fh fs.FileHandle, data []byte, off int64) (uint32, syscall.Errno) {
-	return 0, syscall.EROFS
-}
-
-var _ = (fs.NodeGetattrer)((*WebRTCStreamFile)(nil))
-
-func (f *WebRTCStreamFile) Getattr(ctx context.Context, fh fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
-	f.mu.Lock()
-	defer f.mu.Unlock()
-	out.Attr = f.Attr
-	out.Size = f.size
-	return fs.OK
-}
-
-func (f *WebRTCStreamFile) Setattr(ctx context.Context, fh fs.FileHandle, in *fuse.SetAttrIn, out *fuse.AttrOut) syscall.Errno {
-	f.mu.Lock()
-	defer f.mu.Unlock()
-	out.Attr = f.Attr
-	return fs.OK
-}
-
-func (f *WebRTCStreamFile) Flush(ctx context.Context, fh fs.FileHandle) syscall.Errno {
-	return fs.OK
-}
-
-type DiskReadRequest struct {
-	Start uint64 `json:"start"`
-	End   uint64 `json:"end"`
-}
-
-var diskReadChan = make(chan []byte, 1)
-
-func (f *WebRTCStreamFile) Read(ctx context.Context, fh fs.FileHandle, dest []byte, off int64) (fuse.ReadResult, syscall.Errno) {
-	buf, err := webRTCDiskReader.Read(ctx, off, int64(len(dest)))
-	if err != nil {
-		return nil, syscall.EIO
-	}
-	return fuse.ReadResultData(buf), fs.OK
-}
-
-func (f *WebRTCStreamFile) SetSize(size uint64) {
-	f.mu.Lock()
-	defer f.mu.Unlock()
-	f.size = size
-}
-
-type FuseRoot struct {
-	fs.Inode
-}
-
-var webRTCStreamFile = &WebRTCStreamFile{}
-
-func (r *FuseRoot) OnAdd(ctx context.Context) {
-	ch := r.NewPersistentInode(ctx, webRTCStreamFile, fs.StableAttr{Ino: 2})
-	r.AddChild("disk", ch, false)
-}
-
-func (r *FuseRoot) Getattr(ctx context.Context, fh fs.FileHandle, out *fuse.AttrOut) syscall.Errno {
-	out.Mode = 0755
-	return 0
-}
-
-var _ = (fs.NodeGetattrer)((*FuseRoot)(nil))
-var _ = (fs.NodeOnAdder)((*FuseRoot)(nil))
-
-const fuseMountPoint = "/mnt/webrtc"
-
-var fuseServer *fuse.Server
-
-func RunFuseServer() {
-	opts := &fs.Options{}
-	opts.DirectMountStrict = true
-	_ = os.Mkdir(fuseMountPoint, 0755)
-	var err error
-	fuseServer, err = fs.Mount(fuseMountPoint, &FuseRoot{}, opts)
-	if err != nil {
-		logger.Warn().Err(err).Msg("failed to mount fuse")
-	}
-	fuseServer.Wait()
-}
-
-type WebRTCImage struct {
-	Size     uint64 `json:"size"`
-	Filename string `json:"filename"`
-}

jsonrpc.go

@@ -1103,7 +1103,6 @@ var rpcHandlers = map[string]RPCHandler{
 	"getVirtualMediaState":   {Func: rpcGetVirtualMediaState},
 	"getStorageSpace":        {Func: rpcGetStorageSpace},
 	"mountWithHTTP":          {Func: rpcMountWithHTTP, Params: []string{"url", "mode"}},
-	"mountWithWebRTC":        {Func: rpcMountWithWebRTC, Params: []string{"filename", "size", "mode"}},
 	"mountWithStorage":       {Func: rpcMountWithStorage, Params: []string{"filename", "mode"}},
 	"listStorageFiles":       {Func: rpcListStorageFiles},
 	"deleteStorageFile":      {Func: rpcDeleteStorageFile, Params: []string{"filename"}},

remote_mount.go

@@ -1,62 +0,0 @@
-package kvm
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-)
-
-type RemoteImageReader interface {
-	Read(ctx context.Context, offset int64, size int64) ([]byte, error)
-}
-
-type WebRTCDiskReader struct {
-}
-
-var webRTCDiskReader WebRTCDiskReader
-
-func (w *WebRTCDiskReader) Read(ctx context.Context, offset int64, size int64) ([]byte, error) {
-	virtualMediaStateMutex.RLock()
-	if currentVirtualMediaState == nil {
-		virtualMediaStateMutex.RUnlock()
-		return nil, errors.New("image not mounted")
-	}
-	if currentVirtualMediaState.Source != WebRTC {
-		virtualMediaStateMutex.RUnlock()
-		return nil, errors.New("image not mounted from webrtc")
-	}
-	mountedImageSize := currentVirtualMediaState.Size
-	virtualMediaStateMutex.RUnlock()
-	end := min(offset+size, mountedImageSize)
-	req := DiskReadRequest{
-		Start: uint64(offset),
-		End:   uint64(end),
-	}
-	jsonBytes, err := json.Marshal(req)
-	if err != nil {
-		return nil, err
-	}
-
-	if currentSession == nil || currentSession.DiskChannel == nil {
-		return nil, errors.New("not active session")
-	}
-
-	logger.Debug().Str("request", string(jsonBytes)).Msg("reading from webrtc")
-	err = currentSession.DiskChannel.SendText(string(jsonBytes))
-	if err != nil {
-		return nil, err
-	}
-	var buf []byte
-	for {
-		select {
-		case data := <-diskReadChan:
-			buf = data[16:]
-		case <-ctx.Done():
-			return nil, context.Canceled
-		}
-		if len(buf) >= int(end-offset) {
-			break
-		}
-	}
-	return buf, nil
-}

usb_mass_storage.go

@@ -69,11 +69,6 @@ func setMassStorageMode(cdrom bool) error {
 	return gadget.UpdateGadgetConfig()
 }
 
-func onDiskMessage(msg webrtc.DataChannelMessage) {
-	logger.Info().Int("len", len(msg.Data)).Msg("Disk Message")
-	diskReadChan <- msg.Data
-}
-
 func mountImage(imagePath string) error {
 	err := setMassStorageImage("")
 	if err != nil {
@@ -234,7 +229,6 @@ func getInitialVirtualMediaState() (*VirtualMediaState, error) {
 		initialState.Mode = CDROM
 	}
 
-	// TODO: check if it's WebRTC or HTTP
 	switch diskPath {
 	case "":
 		return nil, nil
@@ -313,43 +307,6 @@ func rpcMountWithHTTP(url string, mode VirtualMediaMode) error {
 	return nil
 }
 
-func rpcMountWithWebRTC(filename string, size int64, mode VirtualMediaMode) error {
-	virtualMediaStateMutex.Lock()
-	if currentVirtualMediaState != nil {
-		virtualMediaStateMutex.Unlock()
-		return fmt.Errorf("another virtual media is already mounted")
-	}
-	currentVirtualMediaState = &VirtualMediaState{
-		Source:   WebRTC,
-		Mode:     mode,
-		Filename: filename,
-		Size:     size,
-	}
-	virtualMediaStateMutex.Unlock()
-
-	if err := setMassStorageMode(mode == CDROM); err != nil {
-		return fmt.Errorf("failed to set mass storage mode: %w", err)
-	}
-
-	logger.Debug().Interface("currentVirtualMediaState", currentVirtualMediaState).Msg("currentVirtualMediaState")
-	logger.Debug().Msg("Starting nbd device")
-	nbdDevice = NewNBDDevice()
-	err := nbdDevice.Start()
-	if err != nil {
-		logger.Warn().Err(err).Msg("failed to start nbd device")
-		return err
-	}
-	logger.Debug().Msg("nbd device started")
-	//TODO: replace by polling on block device having right size
-	time.Sleep(1 * time.Second)
-	err = setMassStorageImage("/dev/nbd0")
-	if err != nil {
-		return err
-	}
-	logger.Info().Msg("usb mass storage mounted")
-	return nil
-}
-
 func rpcMountWithStorage(filename string, mode VirtualMediaMode) error {
 	filename, err := sanitizeFilename(filename)
 	if err != nil {

webrtc.go

@@ -126,9 +126,6 @@ func newSession(config SessionConfig) (*Session, error) {
 			triggerOTAStateUpdate()
 			triggerVideoStateUpdate()
 			triggerUSBStateUpdate()
-		case "disk":
-			session.DiskChannel = d
-			d.OnMessage(onDiskMessage)
 		case "terminal":
 			handleTerminalChannel(d)
 		case "serial":