// createHeader - create a new random header and write it to disk
func (f *file) createHeader() error {
h := cryptfs.RandomHeader()
buf := h.Pack()
_, err := f.fd.WriteAt(buf, 0)
if err != nil {
return err
}
f.header = h
return nil
}
// createHeader - create a new random header and write it to disk
func (f *file) createHeader() error {
h := cryptfs.RandomHeader()
buf := h.Pack()
// Prevent partially written (=corrupt) header by preallocating the space beforehand
f.fdLock.Lock()
defer f.fdLock.Unlock()
err := prealloc(int(f.fd.Fd()), 0, cryptfs.HEADER_LEN)
if err != nil {
cryptfs.Warn.Printf("createHeader: fallocateRetry failed: %s\n", err.Error())
return err
}
// Actually write header
_, err = f.fd.WriteAt(buf, 0)
if err != nil {
return err
}
f.header = h
return nil
}