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copyoperation.cpp

/***************************************************************************
 *   Copyright (C) 2008 by Volker Lanz <vl@fidra.de>                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
 ***************************************************************************/

#include "ops/copyoperation.h"

#include "core/partition.h"
#include "core/device.h"

#include "jobs/createpartitionjob.h"
#include "jobs/deletepartitionjob.h"
#include "jobs/checkfilesystemjob.h"
#include "jobs/copyfilesystemjob.h"
#include "jobs/resizefilesystemjob.h"

#include "fs/filesystemfactory.h"

#include "util/capacity.h"
#include "util/report.h"

#include <QString>

#include <kdebug.h>
#include <klocale.h>

/** Creates a new CopyOperation.
      @param targetdevice the Device to copy the Partition to
      @param copiedpartition pointer to the new Partition object on the target Device. May not be NULL.
      @param sourcedevice the Device where to copy from
      @param sourcepartition pointer to the Partition to copy from. May not be NULL.
*/
00047 CopyOperation::CopyOperation(Device& targetdevice, Partition* copiedpartition, Device& sourcedevice, Partition* sourcepartition) :
      Operation(),
      m_TargetDevice(targetdevice),
      m_CopiedPartition(copiedpartition),
      m_SourceDevice(sourcedevice),
      m_SourcePartition(sourcepartition),
      m_OverwrittenPartition(NULL),
      m_MustDeleteOverwritten(false),
      m_CheckSourceJob(NULL),
      m_CreatePartitionJob(NULL),
      m_CopyFSJob(NULL),
      m_CheckTargetJob(NULL),
      m_MaximizeJob(NULL)
{
      Q_ASSERT(targetDevice().partitionTable());

      Partition* dest = targetDevice().partitionTable()->findPartitionBySector(copiedPartition().firstSector(), PartitionRole(PartitionRole::Primary | PartitionRole::Logical | PartitionRole::Unallocated));

      Q_ASSERT(dest);

      if (dest == NULL)
            kWarning() << "destination partition not found at sector " << copiedPartition().firstSector();

      if (dest && !dest->roles().has(PartitionRole::Unallocated))
      {
            copiedPartition().setLastSector(dest->lastSector());
            setOverwrittenPartition(dest);
      }

      addJob(m_CheckSourceJob = new CheckFileSystemJob(sourcePartition()));

      if (overwrittenPartition() == NULL)
            addJob(m_CreatePartitionJob = new CreatePartitionJob(targetDevice(), copiedPartition()));

      addJob(m_CopyFSJob = new CopyFileSystemJob(targetDevice(), copiedPartition(), sourceDevice(), sourcePartition()));
      addJob(m_CheckTargetJob = new CheckFileSystemJob(copiedPartition()));
      addJob(m_MaximizeJob = new ResizeFileSystemJob(targetDevice(), copiedPartition()));
}

CopyOperation::~CopyOperation()
{
      if (status() == StatusPending)
            delete m_CopiedPartition;

      if (status() == StatusFinishedSuccess || status() == StatusFinishedWarning || status() == StatusError)
            cleanupOverwrittenPartition();
}

00095 void CopyOperation::preview()
{
      if (overwrittenPartition())
            removePreviewPartition(targetDevice(), *overwrittenPartition());

      insertPreviewPartition(targetDevice(), copiedPartition());
}

00103 void CopyOperation::undo()
{
      removePreviewPartition(targetDevice(), copiedPartition());

      if (overwrittenPartition())
            insertPreviewPartition(targetDevice(), *overwrittenPartition());
}

00111 bool CopyOperation::execute(Report& parent)
{
      bool rval = false;
      bool warning = false;

      Report* report = parent.newChild(description());

      // check the source first
      if ((rval = checkSourceJob()->run(*report)))
      {
            // At this point, if the target partition is to be created and not overwritten, it
            // will still have the wrong device path (the one of the source device). We need
            // to adjust that before we're creating it.
            copiedPartition().setDevicePath(targetDevice().deviceNode());

            // either we have no partition to create (because we're overwriting) or creating
            // must be successful
            if (!createPartitionJob() || (rval = createPartitionJob()->run(*report)))
            {
                  // set the state of the target partition from StateCopy to StateNone or checking
                  // it will fail (because its deviceNode() will still be "Copy of sdXn"). This is
                  // only required for overwritten partitions, but doesn't hurt in any case.
                  copiedPartition().setState(Partition::StateNone);

                  // if we have overwritten a partition, reset device path and number
                  if (overwrittenPartition())
                  {
                        copiedPartition().setDevicePath(overwrittenPartition()->devicePath());
                        copiedPartition().setNumber(overwrittenPartition()->number());
                  }

                  // now run the copy job itself
                  if ((rval = copyFSJob()->run(*report)))
                  {
                        // and if the copy job succeeded, check the target
                        if ((rval = checkTargetJob()->run(*report)))
                        {
                              // ok, everything went well
                              rval = true;

                              // if maximizing doesn't work, just warn the user, don't fail
                              if (!maximizeJob()->run(*report))
                              {
                                    report->line() << i18nc("@info/plain", "Warning: Maximizing file system on target partition <filename>%1</filename> to the size of the partition failed.", copiedPartition().deviceNode());
                                    warning = true;
                              }
                        }
                        else
                              report->line() << i18nc("@info/plain", "Checking target partition <filename>%1</filename> after copy failed.", copiedPartition().deviceNode());
                  }
                  else
                  {
                        if (createPartitionJob())
                        {
                              DeletePartitionJob deleteJob(targetDevice(), copiedPartition());
                              deleteJob.run(*report);
                        }

                        report->line() << i18nc("@info/plain", "Copying source to target partition failed.");
                  }
            }
            else
                  report->line() << i18nc("@info/plain", "Creating target partition for copying failed.");
      }
      else
            report->line() << i18nc("@info/plain", "Checking source partition <filename>%1</filename> failed.", sourcePartition().deviceNode());

      if (rval)
            setStatus(warning ? StatusFinishedWarning : StatusFinishedSuccess);
      else
            setStatus(StatusError);

      report->setStatus(i18nc("@info/plain status (success, error, warning...) of operation", "%1: %2", description(), statusText()));

      return rval;
}

00188 QString CopyOperation::description() const
{
      if (overwrittenPartition())
      {
            if (copiedPartition().length() == overwrittenPartition()->length())
                  return QString(i18nc("@info/plain", "Copy partition <filename>%1</filename> (%2, %3) to <filename>%4</filename> (%5, %6)",
                        sourcePartition().deviceNode(),
                        Capacity(sourcePartition()).toString(),
                        sourcePartition().fileSystem().name(),
                        overwrittenPartition()->deviceNode(),
                        Capacity(*overwrittenPartition()).toString(),
                        overwrittenPartition()->fileSystem().name()
                  ));

            return QString(i18nc("@info/plain", "Copy partition <filename>%1</filename> (%2, %3) to <filename>%4</filename> (%5, %6) and grow it to %7",
                  sourcePartition().deviceNode(),
                  Capacity(sourcePartition()).toString(),
                  sourcePartition().fileSystem().name(),
                  overwrittenPartition()->deviceNode(),
                  Capacity(*overwrittenPartition()).toString(),
                  overwrittenPartition()->fileSystem().name(),
                  Capacity(copiedPartition()).toString()
            ));
      }

      if (copiedPartition().length() == sourcePartition().length())
            return QString(i18nc("@info/plain", "Copy partition <filename>%1</filename> (%2, %3) to unallocated space (starting at %4) on <filename>%5</filename>",
                  sourcePartition().deviceNode(),
                  Capacity(sourcePartition()).toString(),
                  sourcePartition().fileSystem().name(),
                  Capacity(copiedPartition().firstSector() * copiedPartition().sectorSize()).toString(),
                  targetDevice().deviceNode()
            ));

      return QString(i18nc("@info/plain", "Copy partition <filename>%1</filename> (%2, %3) to unallocated space (starting at %4) on <filename>%5</filename> and grow it to %6",
            sourcePartition().deviceNode(),
            Capacity(sourcePartition()).toString(),
            sourcePartition().fileSystem().name(),
            Capacity(copiedPartition().firstSector() * copiedPartition().sectorSize()).toString(),
            targetDevice().deviceNode(),
            Capacity(copiedPartition()).toString()
      ));
}

void CopyOperation::setOverwrittenPartition(Partition* p)
{
      // this code is also in RestoreOperation.

      cleanupOverwrittenPartition();
      m_OverwrittenPartition = p;

      // If the overwritten partition has no other operation that owns it (e.g., an OperationNew or
      // an OperationRestore), we're the new owner. So remember that, because after the operations all
      // have executed and we're asked to clean up after ourselves, the state of the overwritten partition
      // might have changed: If it was a new one and the NewOperation has successfully run, the state will
      // then be StateNone.
      m_MustDeleteOverwritten = (p && p->state() == Partition::StateNone);
}

void CopyOperation::cleanupOverwrittenPartition()
{
      if (mustDeleteOverwritten())
      {
            delete overwrittenPartition();
            m_OverwrittenPartition = NULL;
      }
}

/** Creates a new copied Partition.
      @param target the target Partition to copy to (may be unallocated)
      @param source the source Partition to copy
      @return pointer to the newly created Partition object
*/
00261 Partition* CopyOperation::createCopy(const Partition& target, const Partition& source)
{
      Partition* p = target.roles().has(PartitionRole::Unallocated) ? new Partition(source) : new Partition(target);

      p->setNumber(source.number());
      p->setDevicePath(source.devicePath());
      p->setState(Partition::StateCopy);

      p->deleteFileSystem();
      p->setFileSystem(FileSystemFactory::create(source.fileSystem()));

      p->fileSystem().setFirstSector(p->firstSector());
      p->fileSystem().setLastSector(p->lastSector());

      p->setFlags(PartitionTable::FlagNone);

      return p;
}

/** Can a Partition be copied?
      @param p the Partition in question, may be NULL.
      @return true if @p p can be copied.
 */
00284 bool CopyOperation::canCopy(const Partition* p)
{
      if (p == NULL)
            return false;

      if (p->isMounted())
            return false;

      // Normally, copying partitions that have not been written to disk yet should
      // be forbidden here. The operation stack, however, will take care of these
      // problematic cases when pushing the CopyOperation onto the stack.

      return p->fileSystem().supportCopy() != FileSystem::SupportNone;
}

/** Can a Partition be pasted on another one?
      @param p the Partition to be pasted to, may be NULL
      @param source the Partition to be pasted, may be NULL
      @return true if @p source can be pasted on @p p
 */
00304 bool CopyOperation::canPaste(const Partition* p, const Partition* source)
{
      if (p == NULL || source == NULL)
            return false;

      if (p->isMounted())
            return false;

      if (p->roles().has(PartitionRole::Extended))
            return false;

      if (p == source)
            return false;

      if (source->length() > p->length())
            return false;

      return true;
}

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