file_systems/ext2/Journal.cpp

682 	JournalSuperBlock superblock;
684 		&superblock, sizeof(superblock));
686 	if (bytesRead != sizeof(superblock))
689 	superblock.SetFirstCommitID(fFirstCommitID);
690 	superblock.SetLogStart(fLogStart);
693 		superblock.SetChecksum(_Checksum(&superblock));
698 		&superblock, sizeof(superblock));
700 	if (bytesWritten != sizeof(superblock))
722 	TRACE("Journal::_LoadSuperBlock(): superblock physical block: %" B_PRIu64
725 	JournalSuperBlock superblock;
727 		* fJournalVolume->BlockSize(), &superblock, sizeof(superblock));
729 	if (bytesRead != sizeof(superblock)) {
730 		ERROR("Journal::_LoadSuperBlock(): failed to read superblock\n");
734 	if (!superblock.header.CheckMagic()) {
735 		ERROR("Journal::_LoadSuperBlock(): Invalid superblock magic %" B_PRIx32
736 			"\n", superblock.header.Magic());
740 	if (superblock.header.BlockType() == JOURNAL_SUPERBLOCK_V1) {
741 		TRACE("Journal::_LoadSuperBlock(): Journal superblock version 1\n");
743 	} else if (superblock.header.BlockType() == JOURNAL_SUPERBLOCK_V2) {
744 		TRACE("Journal::_LoadSuperBlock(): Journal superblock version 2\n");
747 		ERROR("Journal::_LoadSuperBlock(): Invalid superblock version\n");
754 			superblock.IncompatibleFeatures(),
755 			superblock.ReadOnlyCompatibleFeatures());
757 		status = _CheckFeatures(&superblock);
763 			if (superblock.Checksum() != _Checksum(&superblock)) {
767 			fChecksumSeed = calculate_crc32c(0xffffffff, (uint8*)superblock.uuid,
768 				sizeof(superblock.uuid));
772 	fBlockSize = superblock.BlockSize();
773 	fFirstCommitID = superblock.FirstCommitID();
774 	fFirstLogBlock = superblock.FirstLogBlock();
775 	fLogStart = superblock.LogStart();
776 	fLogSize = superblock.NumBlocks();
786 		// TODO: Why is "superblock.MaxTransactionBlocks();" zero?
800 Journal::_CheckFeatures(JournalSuperBlock* superblock)
802 	uint32 readonly = superblock->ReadOnlyCompatibleFeatures();
803 	uint32 incompatible = superblock->IncompatibleFeatures();
815 		(superblock->IncompatibleFeatures() & JOURNAL_FEATURE_INCOMPATIBLE_CSUM_V2) != 0;
817 		(superblock->IncompatibleFeatures() & JOURNAL_FEATURE_INCOMPATIBLE_CSUM_V3) != 0;
825 		(superblock->IncompatibleFeatures() & JOURNAL_FEATURE_INCOMPATIBLE_64BIT) != 0;
831 Journal::_Checksum(JournalSuperBlock* superblock)
833 	uint32 oldChecksum = superblock->checksum;
834 	superblock->checksum = 0;
835 	uint32 checksum = calculate_crc32c(0xffffffff, (uint8*)superblock,
837 	superblock->checksum = oldChecksum;
1356 			panic("ext2: Failed to write journal superblock\n");