bool Job::rollbackCopyBlocks(Report& report, CopyTarget& origTarget, CopySource& origSource)
{
if (!origSource.overlaps(origTarget))
{
report.line() << i18nc("@info/plain", "Source and target for copying do not overlap: Rollback is not required.");
return true;
}
try
{
CopySourceDevice& csd = dynamic_cast<CopySourceDevice&>(origSource);
CopyTargetDevice& ctd = dynamic_cast<CopyTargetDevice&>(origTarget);
// default: use values as if we were copying from front to back.
qint64 undoSourceFirstSector = origTarget.firstSector();
qint64 undoSourceLastSector = origTarget.firstSector() + origTarget.sectorsWritten() - 1;
qint64 undoTargetFirstSector = origSource.firstSector();
qint64 undoTargetLastSector = origSource.firstSector() + origTarget.sectorsWritten() - 1;
if (origTarget.firstSector() > origSource.firstSector())
{
// we were copying from back to front
undoSourceFirstSector = origTarget.firstSector() + origSource.length() - origTarget.sectorsWritten();
undoSourceLastSector = origTarget.firstSector() + origSource.length() - 1;
undoTargetFirstSector = origSource.lastSector() - origTarget.sectorsWritten() + 1;
undoTargetLastSector = origSource.lastSector();
}
report.line() << i18nc("@info/plain", "Rollback from: First sector: %1, last sector: %2.", undoSourceFirstSector, undoSourceLastSector);
report.line() << i18nc("@info/plain", "Rollback to: First sector: %1, last sector: %2.", undoTargetFirstSector, undoTargetLastSector);
CopySourceDevice undoSource(ctd.device(), undoSourceFirstSector, undoSourceLastSector);
if (!undoSource.open())
{
report.line() << i18nc("@info/plain", "Could not open device <filename>%1</filename> to rollback copying.", ctd.device().deviceNode());
return false;
}
CopyTargetDevice undoTarget(csd.device(), undoTargetFirstSector, undoTargetLastSector);
if (!undoTarget.open())
{
report.line() << i18nc("@info/plain", "Could not open device <filename>%1</filename> to rollback copying.", csd.device().deviceNode());
return false;
}
return copyBlocks(report, undoTarget, undoSource);
}
catch ( ... )
{
report.line() << i18nc("@info/plain", "Rollback failed: Source or target are not devices.");
}
return false;
}
bool
MoveFileSystemJob::rollbackCopyBlocks( Report& report, CopyTargetDevice& origTarget, CopySourceDevice& origSource )
{
if ( !origSource.overlaps( origTarget ) )
{
report.line() << tr( "Source and target for copying do not overlap: Rollback is not required." );
return true;
}
// default: use values as if we were copying from front to back.
qint64 undoSourceFirstSector = origTarget.firstSector();
qint64 undoSourceLastSector = origTarget.firstSector() + origTarget.sectorsWritten() - 1;
qint64 undoTargetFirstSector = origSource.firstSector();
qint64 undoTargetLastSector = origSource.firstSector() + origTarget.sectorsWritten() - 1;
if ( origTarget.firstSector() > origSource.firstSector() )
{
// we were copying from back to front
undoSourceFirstSector = origTarget.firstSector() + origSource.length() - origTarget.sectorsWritten();
undoSourceLastSector = origTarget.firstSector() + origSource.length() - 1;
undoTargetFirstSector = origSource.lastSector() - origTarget.sectorsWritten() + 1;
undoTargetLastSector = origSource.lastSector();
}
CopySourceDevice undoSource( origTarget.device(), undoSourceFirstSector, undoSourceLastSector );
if ( !undoSource.open() )
{
report.line() << tr( "Could not open device %1 to rollback copying." )
.arg( origTarget.device().deviceNode() );
return false;
}
CopyTargetDevice undoTarget( origSource.device(), undoTargetFirstSector, undoTargetLastSector );
if ( !undoTarget.open() )
{
report.line() << tr( "Could not open device %1 to rollback copying." )
.arg( origSource.device().deviceNode() );
return false;
}
return copyBlocks( report, undoTarget, undoSource );
}
