hfscommon/Misc/FileExtentMapping.c

139 	const FCB				*fcb,
144 	const FCB	 			*fcb,
183 	FCB				*fcb,
227 	FCB *				fcb;
236 	fcb = GetFileControlBlock(vcb->extentsRefNum);
258 		err = BTSearchRecord(fcb, btIterator, &btRecord, &btRecordSize, btIterator);
261 			err = BTIterateRecord(fcb, kBTreePrevRecord, btIterator, &btRecord, &btRecordSize);
316 		err = BTSearchRecord(fcb, btIterator, &btRecord, &btRecordSize, btIterator);
319 			err = BTIterateRecord(fcb, kBTreePrevRecord, btIterator, &btRecord, &btRecordSize);
479 	FCB				*fcb,				// FCB of file
503 	err = SearchExtentFile(vcb, fcb, offset, &foundKey, foundData, &foundIndex, &hint, &nextFABN);
519 	if (((off_t)fcb->ff_blocks * (off_t)allocBlockSize) < dataEnd)    // Is PEOF shorter?
520 		dataEnd = (off_t)fcb->ff_blocks * (off_t)allocBlockSize;  // Yes, so only map up to PEOF
713 	FCB *	fcb;
717 	fcb = GetFileControlBlock(vcb->extentsRefNum);
720 	err = BTFlushPath(fcb);
727         if (FTOC(fcb)->c_flag & C_MODIFIED)
871 AddFileExtent(ExtendedVCB *vcb, FCB *fcb, u_int32_t startBlock, u_int32_t blockCount)
882 	peof = (int64_t)(fcb->ff_blocks + blockCount) * (int64_t)vcb->blockSize;
884 	error = SearchExtentFile(vcb, fcb, peof-1, &foundKey, foundData, &foundIndex, &hint, &nextBlock);
900 		foundKey.fileID = FTOC(fcb)->c_fileid;
923 		error = UpdateExtentRecord(vcb, fcb, 0, &foundKey, foundData, hint);
941 	FCB				*fcb,				// FCB of file to truncate
976 	prevblocks = fcb->ff_blocks;
989 		if ((((int64_t)fcb->ff_blocks * (int64_t)volumeBlockSize) + bytesToAdd) >= kTwoGigabytes)
1010 		fcb->ff_unallocblocks += blocksToAdd;
1011 		FTOC(fcb)->c_blocks   += blocksToAdd;
1012 		fcb->ff_blocks        += blocksToAdd;
1014 		FTOC(fcb)->c_flag |= C_MODIFIED | C_FORCEUPDATE;
1021 	if (fcb->ff_unallocblocks > 0) {
1024 		loanedBlocks = fcb->ff_unallocblocks;
1027 		FTOC(fcb)->c_blocks -= loanedBlocks;
1028 		fcb->ff_blocks -= loanedBlocks;
1029 		fcb->ff_unallocblocks  = 0;
1054 		 ((((int64_t)fcb->ff_blocks * (int64_t)volumeBlockSize) + bytesToAdd) >= kTwoGigabytes) ) {
1076 	peof = ((int64_t)fcb->ff_blocks * (int64_t)volumeBlockSize) + bytesToAdd;  // potential new PEOF
1077 	err = SearchExtentFile(vcb, fcb, peof-1, &foundKey, foundData, &foundIndex, &hint, &nextBlock);
1080 		fcb->ff_blocks = peof / volumeBlockSize;
1081 		FTOC(fcb)->c_blocks += (bytesToAdd / volumeBlockSize);
1082 		FTOC(fcb)->c_flag |= C_MODIFIED | C_FORCEUPDATE;
1092 	bytesThisExtent = (int64_t)(nextBlock - fcb->ff_blocks) * (int64_t)volumeBlockSize;
1094 		fcb->ff_blocks = nextBlock;
1095 		FTOC(fcb)->c_blocks += (bytesThisExtent / volumeBlockSize);
1096 		FTOC(fcb)->c_flag |= C_MODIFIED;
1119 			&& (fcb->ff_cp->c_fileid >= kHFSFirstUserCatalogNodeID)
1205 				FTOC(fcb)->c_flag |= C_FORCEUPDATE;
1212 				err = UpdateExtentRecord(vcb, fcb, 0, &foundKey, foundData, hint);
1223 					if (FTOC(fcb)->c_fileid == kHFSExtentsFileID) {
1230 					if (FORK_IS_RSRC(fcb))
1235 					foundKey.fileID = FTOC(fcb)->c_fileid;
1266 					err = UpdateExtentRecord(vcb, fcb, 0, &foundKey, foundData, hint);
1283 			fcb->ff_blocks += (bytesThisExtent / volumeBlockSize);
1284 			FTOC(fcb)->c_blocks += (bytesThisExtent / volumeBlockSize);
1285 			FTOC(fcb)->c_flag |= C_MODIFIED | C_FORCEUPDATE;
1309 	if (prevblocks < fcb->ff_blocks) {
1310 		*actualBytesAdded = (int64_t)(fcb->ff_blocks - prevblocks) * (int64_t)volumeBlockSize;
1340 	FCB				*fcb,				// FCB of file to truncate
1380 	temp64 = fcb->ff_blocks;
1406 		FTOC(fcb)->c_blocks -= (fcb->ff_blocks - numBlocks);
1408 	fcb->ff_blocks = numBlocks;
1418 		FTOC(fcb)->c_flag |= (C_MODIFIED | C_FORCEUPDATE);
1428 		err = DeallocateFork(vcb, fileid, forkType, fcb->fcbExtents, &recordDeleted);
1434 				fcb->fcbExtents[i].startBlock = 0;
1435 				fcb->fcbExtents[i].blockCount = 0;
1447 	err = SearchExtentFile(vcb, fcb, peof-1, &key, extentRecord, &extentIndex, &hint, &extentNextBlock);
1504 		err = UpdateExtentRecord(vcb, fcb, deleted, &key, extentRecord, hint);
1531 	FCB  *fcb,
1549 	forkType = FORK_IS_RSRC(fcb) ? kResourceForkType : kDataForkType;
1550 	fileID = FTOC(fcb)->c_fileid;
1560 		blkcnt = fcb->fcbExtents[i].blockCount;
1565 			error = BlockDeallocate(vcb, fcb->fcbExtents[i].startBlock, blkcnt, 0);
1577 					       FTOC(fcb)->c_desc.cd_nameptr ? (const char *)FTOC(fcb)->c_desc.cd_nameptr : "", error);
1582 			fcb->fcbExtents[i].startBlock = 0;
1583 			fcb->fcbExtents[i].blockCount = 0;
1585 			tailExtents[j].startBlock = fcb->fcbExtents[i].startBlock;
1612 				       FTOC(fcb)->c_desc.cd_nameptr ? (const char *)FTOC(fcb)->c_desc.cd_nameptr : "", error);
1626 					       FTOC(fcb)->c_desc.cd_nameptr ? (const char *)FTOC(fcb)->c_desc.cd_nameptr : "", error);
1641 				FTOC(fcb)->c_desc.cd_nameptr ? (const char *)FTOC(fcb)->c_desc.cd_nameptr : "", error);
1654 		bcopy(tailExtents, fcb->fcbExtents, sizeof(tailExtents));
1655 		blkcnt = fcb->ff_blocks - headblks;
1656 		FTOC(fcb)->c_blocks -= headblks;
1657 		fcb->ff_blocks = blkcnt;
1659 		FTOC(fcb)->c_flag |= C_FORCEUPDATE;
1660 		FTOC(fcb)->c_touch_chgtime = TRUE;
1773 //				fcb  			-  FCB pointer
1796 	const FCB	 		*fcb,
1813     bcopy ( fcb->fcbExtents, foundExtentData, sizeof(HFSPlusExtentRecord));
1843 	err = FindExtentRecord(vcb, FORK_IS_RSRC(fcb) ? kResourceForkType : kDataForkType,
1844 						   FTOC(fcb)->c_fileid, filePositionBlock, true, foundExtentKey, foundExtentData, extentBTreeHint);
1854 		err = GetFCBExtentRecord(fcb, foundExtentData);
1886 //				fcb						-	the file that owns the extents
1898 static OSErr UpdateExtentRecord (ExtendedVCB *vcb, FCB  *fcb, int deleted,
1906 		BlockMoveData(extentData, fcb->fcbExtents, sizeof(HFSPlusExtentRecord));
1908 			FTOC(fcb)->c_flag |= C_MODIFIED;
2025 	const FCB			*fcb,
2029 	BlockMoveData(fcb->fcbExtents, extents, sizeof(HFSPlusExtentRecord));
2085 	FCB			*fcb,
2105 	(void) GetFCBExtentRecord(fcb, extents);
2110 		 (int64_t)((int64_t)blocksChecked * (int64_t)vcb->blockSize) >= (int64_t)fcb->ff_size)
2120 		result = FindExtentRecord(vcb, kDataForkType, fcb->ff_cp->c_fileid, startBlock, FALSE, &key, extents, &hint);