file_systems/ext2/DataStream.cpp

180 DataStream::Enlarge(Transaction& transaction, off_t& numBlocks)
183 		B_PRIdOFF "\n", fNumBlocks, numBlocks);
185 	off_t targetBlocks = numBlocks;
186 	fWaiting = _BlocksNeeded(numBlocks);
187 	numBlocks = fWaiting;
253 DataStream::Shrink(Transaction& transaction, off_t& numBlocks)
256 		B_PRIdOFF "\n", fNumBlocks, numBlocks);
263 	off_t blocksToRemove = fNumBlocks - numBlocks;
267 	if (numBlocks < kMaxDirect) {
268 		status = _RemoveFromDirectBlocks(transaction, numBlocks);
277 			numBlocks = _BlocksNeeded(oldNumBlocks);
283 	if (numBlocks < kMaxIndirect) {
284 		status = _RemoveFromIndirectBlock(transaction, numBlocks);
293 			numBlocks = _BlocksNeeded(oldNumBlocks);
299 	if (numBlocks < kMaxDoubleIndirect) {
300 		status = _RemoveFromDoubleIndirectBlock(transaction, numBlocks);
309 			numBlocks = _BlocksNeeded(oldNumBlocks);
315 	status = _RemoveFromTripleIndirectBlock(transaction, numBlocks);
323 	numBlocks = _BlocksNeeded(oldNumBlocks);
330 DataStream::_BlocksNeeded(off_t numBlocks)
332 	TRACE("DataStream::BlocksNeeded(): num blocks %" B_PRIdOFF "\n", numBlocks);
335 	if (numBlocks > fNumBlocks) {
336 		blocksNeeded += numBlocks - fNumBlocks;
338 		if (numBlocks > kMaxDirect) {
342 			if (numBlocks > kMaxIndirect) {
344 					blocksNeeded += 2 + (numBlocks - kMaxIndirect - 1)
347 					blocksNeeded += (numBlocks - kMaxIndirect - 1)
352 				if (numBlocks > kMaxDoubleIndirect) {
354 						blocksNeeded += 2 + (numBlocks - kMaxDoubleIndirect - 1)
357 						blocksNeeded += (numBlocks - kMaxDoubleIndirect - 1)
530 DataStream::_AddForDirectBlocks(Transaction& transaction, uint32 numBlocks)
533 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
535 	uint32 end = numBlocks > kMaxDirect ? kMaxDirect : numBlocks;
542 DataStream::_AddForIndirectBlock(Transaction& transaction, uint32 numBlocks)
545 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
548 	uint32 end = numBlocks - kMaxDirect;
559 	uint32 numBlocks)
562 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
565 	uint32 end = numBlocks - kMaxIndirect;
576 	uint32 numBlocks)
579 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
582 	uint32 end = numBlocks - kMaxDoubleIndirect;
731 DataStream::_RemoveFromDirectBlocks(Transaction& transaction, uint32 numBlocks)
734 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
735 	uint32* direct = &fStream->direct[numBlocks];
738 	return _FreeBlocks(transaction, direct, end - numBlocks);
743 DataStream::_RemoveFromIndirectBlock(Transaction& transaction, uint32 numBlocks)
746 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
748 	off_t start = numBlocks <= kMaxDirect ? 0 : numBlocks - kMaxDirect;
762 	uint32 numBlocks)
765 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
767 	off_t start = numBlocks <= kMaxIndirect ? 0 : numBlocks - kMaxIndirect;
781 	uint32 numBlocks)
784 		", target size: %" B_PRIu32 "\n", fNumBlocks, numBlocks);
786 	off_t start = numBlocks <= kMaxDoubleIndirect ? 0
787 		: numBlocks - kMaxDoubleIndirect;