Method checkJournal

chunk/storage.go:178–208

checkJournal verifies the journal header

(journal []byte, skipMaxChunks bool)

// checkJournal verifies the journal header
func (s *Storage) checkJournal(journal []byte, skipMaxChunks bool) bool {
	h := (*journalHeader)(unsafe.Pointer(&journal[0]))
	// check magic bytes / endianess mismatch ('PD' vs 'DP')
	if h.magic != journalMagic {
		Log.Debugf("Journal magic mismatch: %v != %v", h.magic, journalMagic)
		return false
	}
	checksum := crc32.Checksum(journal[:12], crc32Table)
	if h.checksum != checksum {
		Log.Debugf("Journal checksum mismatch: %08X != %08X", h.checksum, checksum)
		return false
	}
	if h.version != journalVersion {
		Log.Debugf("Journal version mismatch: %v != %v", h.version, journalVersion)
		return false
	}
	if h.headerSize != uint8(headerSize) {
		Log.Debugf("Journal chunk header size mismatch: %v != %v", h.headerSize, headerSize)
		return false
	}
	if !skipMaxChunks && h.maxChunks != uint32(s.MaxChunks) {
		Log.Debugf("Journal max chunks mismatch: %v != %v", h.maxChunks, s.MaxChunks)
		return false
	}
	if h.chunkSize != uint32(s.ChunkSize) {
		Log.Debugf("Journal chunk size mismatch: %v != %v", h.chunkSize, s.ChunkSize)
		return false
	}
	Log.Debug("Journal is valid")
	return true
}

// initJournal initializes the journal
func (s *Storage) initJournal(journal []byte) {