/*
* This function moves the overflow extents associated with srcID into the file associated with dstID.
* We should have already verified that 'srcID' has overflow extents. So now we move all of the overflow
* extent records.
*/
OSErr MoveData( ExtendedVCB *vcb, HFSCatalogNodeID srcID, HFSCatalogNodeID destID, int rsrc) {
OSErr err;
/*
* Only the source file should have extents, so we just track those.
* We operate on the fork represented by the open FD that was used to call into this
* function
*/
if (rsrc) {
/* Copy the extent overflow blocks. */
err = MoveExtents( vcb, srcID, destID, 1, (u_int8_t)0xff, 1);
if ( err != noErr ) {
if ( err != dskFulErr ) {
return( err );
}
/*
* In case of error, we would have probably run into problems
* growing the extents b-tree. Since the move is actually a copy + delete
* just delete the new entries. Same for below.
*/
err = DeleteExtents( vcb, destID, 1, (u_int8_t)0xff, 1);
ReturnIfError( err ); // we are doomed. Just QUIT!
goto FlushAndReturn;
}
}
else {
/* Copy the extent overflow blocks. */
err = MoveExtents( vcb, srcID, destID, 1, 0, 1);
if ( err != noErr ) {
if ( err != dskFulErr ) {
return( err );
}
err = DeleteExtents( vcb, destID, 1, 0, 1);
ReturnIfError( err ); // we are doomed. Just QUIT!
goto FlushAndReturn;
}
}
FlushAndReturn:
/* Write out the catalog and extent overflow B-Tree changes */
err = FlushCatalog( vcb );
err = FlushExtentFile( vcb );
return( err );
}
OSErr ExchangeFileIDs( ExtendedVCB *vcb, ConstUTF8Param srcName, ConstUTF8Param destName, HFSCatalogNodeID srcID, HFSCatalogNodeID destID, u_int32_t srcHint, u_int32_t destHint )
{
CatalogKey srcKey; // 518 bytes
CatalogKey destKey; // 518 bytes
CatalogRecord srcData; // 520 bytes
CatalogRecord destData; // 520 bytes
CatalogRecord swapData; // 520 bytes
int16_t numSrcExtentBlocks;
int16_t numDestExtentBlocks;
OSErr err;
Boolean isHFSPlus = ( vcb->vcbSigWord == kHFSPlusSigWord );
err = BuildCatalogKeyUTF8(vcb, srcID, srcName, kUndefinedStrLen, &srcKey, NULL);
ReturnIfError(err);
err = BuildCatalogKeyUTF8(vcb, destID, destName, kUndefinedStrLen, &destKey, NULL);
ReturnIfError(err);
if ( isHFSPlus )
{
//-- Step 1: Check the catalog nodes for extents
//-- locate the source file, test for extents in extent file, and copy the cat record for later
err = LocateCatalogNodeByKey( vcb, srcHint, &srcKey, &srcData, &srcHint );
ReturnIfError( err );
if ( srcData.recordType != kHFSPlusFileRecord )
return( cmFThdDirErr ); // Error "cmFThdDirErr = it is a directory"
//-- Check if there are any extents in the source file
//€€ I am only checling the extents in the low 32 bits, routine will fail if files extents after 2 gig are in overflow
numSrcExtentBlocks = CheckExtents( srcData.hfsPlusFile.dataFork.extents, srcData.hfsPlusFile.dataFork.totalBlocks, isHFSPlus );
if ( numSrcExtentBlocks == 0 ) // then check the resource fork extents
numSrcExtentBlocks = CheckExtents( srcData.hfsPlusFile.resourceFork.extents, srcData.hfsPlusFile.resourceFork.totalBlocks, isHFSPlus );
//-- Check if there are any extents in the destination file
err = LocateCatalogNodeByKey( vcb, destHint, &destKey, &destData, &destHint );
ReturnIfError( err );
if ( destData.recordType != kHFSPlusFileRecord )
return( cmFThdDirErr ); // Error "cmFThdDirErr = it is a directory"
numDestExtentBlocks = CheckExtents( destData.hfsPlusFile.dataFork.extents, destData.hfsPlusFile.dataFork.totalBlocks, isHFSPlus );
if ( numDestExtentBlocks == 0 ) // then check the resource fork extents
numDestExtentBlocks = CheckExtents( destData.hfsPlusFile.resourceFork.extents, destData.hfsPlusFile.resourceFork.totalBlocks, isHFSPlus );
//-- Step 2: Exchange the Extent key in the extent file
//-- Exchange the extents key in the extent file
err = DeleteExtents( vcb, kHFSBogusExtentFileID, isHFSPlus );
ReturnIfError( err );
if ( numSrcExtentBlocks && numDestExtentBlocks ) // if both files have extents
{
//-- Change the source extents file ids to our known bogus value
err = MoveExtents( vcb, srcData.hfsPlusFile.fileID, kHFSBogusExtentFileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
else
goto ExUndo1a;
}
//-- Change the destination extents file id's to the source id's
err = MoveExtents( vcb, destData.hfsPlusFile.fileID, srcData.hfsPlusFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
ExUndo2aPlus: err = DeleteExtents( vcb, srcData.hfsPlusFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
err = MoveExtents( vcb, kHFSBogusExtentFileID, srcData.hfsPlusFile.fileID, isHFSPlus ); // Move the extents back
ReturnIfError( err ); // we are doomed. Just QUIT!
goto ExUndo1a;
}
//-- Change the bogus extents file id's to the dest id's
err = MoveExtents( vcb, kHFSBogusExtentFileID, destData.hfsPlusFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
err = DeleteExtents( vcb, destData.hfsPlusFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
err = MoveExtents( vcb, srcData.hfsPlusFile.fileID, destData.hfsPlusFile.fileID, isHFSPlus ); // Move the extents back
ReturnIfError( err ); // we are doomed. Just QUIT!
goto ExUndo2aPlus;
}
}
else if ( numSrcExtentBlocks ) // just the source file has extents
{
err = MoveExtents( vcb, srcData.hfsPlusFile.fileID, destData.hfsPlusFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
err = DeleteExtents( vcb, srcData.hfsPlusFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
goto FlushAndReturn;
}
}
else if ( numDestExtentBlocks ) // just the destination file has extents
{
err = MoveExtents( vcb, destData.hfsPlusFile.fileID, srcData.hfsPlusFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
err = DeleteExtents( vcb, destData.hfsPlusFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
goto FlushAndReturn;
}
}
//-- Step 3: Change the data in the catalog nodes
//-- find the source cnode and put dest info in it
err = LocateCatalogNodeByKey( vcb, srcHint, &srcKey, &srcData, &srcHint );
if ( err != noErr )
return( cmBadNews );
BlockMoveData( &srcData, &swapData, sizeof(CatalogRecord) );
CopyBigCatalogNodeInfo( &destData, &srcData );
err = ReplaceBTreeRecord( vcb->catalogRefNum, &srcKey, srcHint, &srcData, sizeof(HFSPlusCatalogFile), &srcHint );
ReturnIfError( err );
// find the destination cnode and put source info in it
err = LocateCatalogNodeByKey( vcb, destHint, &destKey, &destData, &destHint );
if ( err != noErr )
return( cmBadNews );
CopyBigCatalogNodeInfo( &swapData, &destData );
err = ReplaceBTreeRecord( vcb->catalogRefNum, &destKey, destHint, &destData, sizeof(HFSPlusCatalogFile), &destHint );
ReturnIfError( err );
}
else // HFS //
{
//-- Step 1: Check the catalog nodes for extents
//-- locate the source file, test for extents in extent file, and copy the cat record for later
err = LocateCatalogNodeByKey( vcb, srcHint, &srcKey, &srcData, &srcHint );
ReturnIfError( err );
if ( srcData.recordType != kHFSFileRecord )
return( cmFThdDirErr ); // Error "cmFThdDirErr = it is a directory"
//-- Check if there are any extents in the source file
numSrcExtentBlocks = CheckExtents( srcData.hfsFile.dataExtents, srcData.hfsFile.dataPhysicalSize / vcb->blockSize, isHFSPlus );
if ( numSrcExtentBlocks == 0 ) // then check the resource fork extents
numSrcExtentBlocks = CheckExtents( srcData.hfsFile.rsrcExtents, srcData.hfsFile.rsrcPhysicalSize / vcb->blockSize, isHFSPlus );
//€€ Do we save the found source node for later use?
//-- Check if there are any extents in the destination file
err = LocateCatalogNodeByKey( vcb, destHint, &destKey, &destData, &destHint );
ReturnIfError( err );
if ( destData.recordType != kHFSFileRecord )
return( cmFThdDirErr ); // Error "cmFThdDirErr = it is a directory"
numDestExtentBlocks = CheckExtents( destData.hfsFile.dataExtents, destData.hfsFile.dataPhysicalSize / vcb->blockSize, isHFSPlus );
if ( numDestExtentBlocks == 0 ) // then check the resource fork extents
numDestExtentBlocks = CheckExtents( destData.hfsFile.rsrcExtents, destData.hfsFile.rsrcPhysicalSize / vcb->blockSize, isHFSPlus );
//€€ Do we save the found destination node for later use?
//-- Step 2: Exchange the Extent key in the extent file
//-- Exchange the extents key in the extent file
err = DeleteExtents( vcb, kHFSBogusExtentFileID, isHFSPlus );
ReturnIfError( err );
if ( numSrcExtentBlocks && numDestExtentBlocks ) // if both files have extents
{
//-- Change the source extents file ids to our known bogus value
err = MoveExtents( vcb, srcData.hfsFile.fileID, kHFSBogusExtentFileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
ExUndo1a: err = DeleteExtents( vcb, kHFSBogusExtentFileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
err = FlushCatalog( vcb ); // flush the catalog
err = FlushExtentFile( vcb ); // flush the extent file (unneeded for common case, but it's cheap)
return( dskFulErr );
}
//-- Change the destination extents file id's to the source id's
err = MoveExtents( vcb, destData.hfsFile.fileID, srcData.hfsFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
ExUndo2a: err = DeleteExtents( vcb, srcData.hfsFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
err = MoveExtents( vcb, kHFSBogusExtentFileID, srcData.hfsFile.fileID, isHFSPlus ); // Move the extents back
ReturnIfError( err ); // we are doomed. Just QUIT!
goto ExUndo1a;
}
//-- Change the bogus extents file id's to the dest id's
err = MoveExtents( vcb, kHFSBogusExtentFileID, destData.hfsFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
err = DeleteExtents( vcb, destData.hfsFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
err = MoveExtents( vcb, srcData.hfsFile.fileID, destData.hfsFile.fileID, isHFSPlus ); // Move the extents back
ReturnIfError( err ); // we are doomed. Just QUIT!
goto ExUndo2a;
}
}
else if ( numSrcExtentBlocks ) // just the source file has extents
{
err = MoveExtents( vcb, srcData.hfsFile.fileID, destData.hfsFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
err = DeleteExtents( vcb, srcData.hfsFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
goto FlushAndReturn;
}
}
else if ( numDestExtentBlocks ) // just the destination file has extents
{
err = MoveExtents( vcb, destData.hfsFile.fileID, srcData.hfsFile.fileID, isHFSPlus );
if ( err != noErr )
{
if ( err != dskFulErr )
return( err );
err = DeleteExtents( vcb, destData.hfsFile.fileID, isHFSPlus );
ReturnIfError( err ); // we are doomed. Just QUIT!
goto FlushAndReturn;
}
}
//-- Step 3: Change the data in the catalog nodes
//-- find the source cnode and put dest info in it
err = LocateCatalogNodeByKey( vcb, srcHint, &srcKey, &srcData, &srcHint );
if ( err != noErr )
return( cmBadNews );
BlockMoveData( &srcData, &swapData, sizeof(CatalogRecord) );
//€€ Asm source copies from the saved dest catalog node
CopyCatalogNodeInfo( &destData, &srcData );
err = ReplaceBTreeRecord( vcb->catalogRefNum, &srcKey, srcHint, &srcData, sizeof(HFSCatalogFile), &srcHint );
ReturnIfError( err );
// find the destination cnode and put source info in it
err = LocateCatalogNodeByKey( vcb, destHint, &destKey, &destData, &destHint );
if ( err != noErr )
return( cmBadNews );
CopyCatalogNodeInfo( &swapData, &destData );
err = ReplaceBTreeRecord( vcb->catalogRefNum, &destKey, destHint, &destData, sizeof(HFSCatalogFile), &destHint );
ReturnIfError( err );
}
err = noErr;
//-- Step 4: Error Handling section
FlushAndReturn:
err = FlushCatalog( vcb ); // flush the catalog
err = FlushExtentFile( vcb ); // flush the extent file (unneeded for common case, but it's cheap)
return( err );
}
