// 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) {
// Verify that the requested file exists in the local model.
m.fmut.RLock()
r, ok := m.folderFiles[folder]
m.fmut.RUnlock()
if !ok {
l.Warnf("Request from %s for file %s in nonexistent folder %q", deviceID, name, folder)
return nil, ErrNoSuchFile
}
lf := r.Get(protocol.LocalDeviceID, name)
if protocol.IsInvalid(lf.Flags) || protocol.IsDeleted(lf.Flags) {
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
}
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
}
if debug && deviceID != protocol.LocalDeviceID {
l.Debugf("%v REQ(in): %s: %q / %q o=%d s=%d", m, deviceID, folder, name, offset, size)
}
m.fmut.RLock()
fn := filepath.Join(m.folderCfgs[folder].Path, name)
m.fmut.RUnlock()
fd, err := os.Open(fn) // XXX: Inefficient, should cache fd?
if err != nil {
return nil, err
}
defer fd.Close()
buf := make([]byte, size)
_, err = fd.ReadAt(buf, offset)
if err != nil {
return nil, err
}
return buf, nil
}
func hashFiles(dir string, blockSize int, outbox, inbox chan protocol.FileInfo) {
for f := range inbox {
if protocol.IsDirectory(f.Flags) || protocol.IsDeleted(f.Flags) {
outbox <- f
continue
}
blocks, err := HashFile(filepath.Join(dir, f.Name), blockSize)
if err != nil {
if debug {
l.Debugln("hash error:", f.Name, err)
}
continue
}
f.Blocks = blocks
outbox <- f
}
}
func (m *Model) ScanFolderSub(folder, sub string) error {
if p := filepath.Clean(filepath.Join(folder, sub)); !strings.HasPrefix(p, folder) {
return errors.New("invalid subpath")
}
m.fmut.RLock()
fs, ok := m.folderFiles[folder]
dir := m.folderCfgs[folder].Path
ignores, _ := ignore.Load(filepath.Join(dir, ".stignore"))
m.folderIgnores[folder] = ignores
w := &scanner.Walker{
Dir: dir,
Sub: sub,
Ignores: ignores,
BlockSize: protocol.BlockSize,
TempNamer: defTempNamer,
CurrentFiler: cFiler{m, folder},
IgnorePerms: m.folderCfgs[folder].IgnorePerms,
}
m.fmut.RUnlock()
if !ok {
return errors.New("no such folder")
}
m.setState(folder, FolderScanning)
fchan, err := w.Walk()
if err != nil {
return err
}
batchSize := 100
batch := make([]protocol.FileInfo, 0, 00)
for f := range fchan {
events.Default.Log(events.LocalIndexUpdated, map[string]interface{}{
"folder": folder,
"name": f.Name,
"modified": time.Unix(f.Modified, 0),
"flags": fmt.Sprintf("0%o", f.Flags),
"size": f.Size(),
})
if len(batch) == batchSize {
fs.Update(protocol.LocalDeviceID, batch)
batch = batch[:0]
}
batch = append(batch, f)
}
if len(batch) > 0 {
fs.Update(protocol.LocalDeviceID, batch)
}
batch = batch[:0]
// TODO: We should limit the Have scanning to start at sub
seenPrefix := false
fs.WithHaveTruncated(protocol.LocalDeviceID, func(fi protocol.FileIntf) bool {
f := fi.(protocol.FileInfoTruncated)
if !strings.HasPrefix(f.Name, sub) {
// Return true so that we keep iterating, until we get to the part
// of the tree we are interested in. Then return false so we stop
// iterating when we've passed the end of the subtree.
return !seenPrefix
}
seenPrefix = true
if !protocol.IsDeleted(f.Flags) {
if f.IsInvalid() {
return true
}
if len(batch) == batchSize {
fs.Update(protocol.LocalDeviceID, batch)
batch = batch[:0]
}
if ignores.Match(f.Name) {
// File has been ignored. Set invalid bit.
nf := protocol.FileInfo{
Name: f.Name,
Flags: f.Flags | protocol.FlagInvalid,
Modified: f.Modified,
Version: f.Version, // The file is still the same, so don't bump version
}
events.Default.Log(events.LocalIndexUpdated, map[string]interface{}{
"folder": folder,
"name": f.Name,
"modified": time.Unix(f.Modified, 0),
"flags": fmt.Sprintf("0%o", f.Flags),
"size": f.Size(),
})
batch = append(batch, nf)
} else if _, err := os.Stat(filepath.Join(dir, f.Name)); err != nil && os.IsNotExist(err) {
// File has been deleted
nf := protocol.FileInfo{
Name: f.Name,
Flags: f.Flags | protocol.FlagDeleted,
Modified: f.Modified,
Version: lamport.Default.Tick(f.Version),
}
events.Default.Log(events.LocalIndexUpdated, map[string]interface{}{
"folder": folder,
"name": f.Name,
"modified": time.Unix(f.Modified, 0),
"flags": fmt.Sprintf("0%o", f.Flags),
"size": f.Size(),
})
batch = append(batch, nf)
}
}
return true
})
if len(batch) > 0 {
fs.Update(protocol.LocalDeviceID, batch)
}
m.setState(folder, FolderIdle)
return nil
}