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resizefilesystemjob.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 "jobs/resizefilesystemjob.h"

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

#include "fs/filesystem.h"

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

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

#include <parted/parted.h>

/** Creates a new ResizeFileSystemJob
      @param d the Device the FileSystem to be resized is on
      @param p the Partition the FileSystem to be resized is on
      @param newlength the new length for the FileSystem; if -1, the FileSystem will be resized to fill the entire Partition
*/
00040 ResizeFileSystemJob::ResizeFileSystemJob(Device& d, Partition& p, qint64 newlength) :
      Job(),
      m_Device(d),
      m_Partition(p),
      m_Maximize(newlength == -1),
      m_NewLength(isMaximizing() ? partition().length() : newlength)
{
}

00049 qint32 ResizeFileSystemJob::numSteps() const
{
      return 100;
}

00054 bool ResizeFileSystemJob::run(Report& parent)
{
      Q_ASSERT(partition().fileSystem().firstSector() != -1);
      Q_ASSERT(partition().fileSystem().lastSector() != -1);
      Q_ASSERT(newLength() <= partition().length());

      if (partition().fileSystem().firstSector() == -1 || partition().fileSystem().lastSector() == -1 || newLength() > partition().length())
      {
            kWarning() << "file system first sector: " << partition().fileSystem().firstSector() << ", last sector: " << partition().fileSystem().lastSector() << ", new length: " << newLength() << ", partition length: " << partition().length();
            return false;
      }
      
      bool rval = false;
      
      Report* report = jobStarted(parent);
      
      if (partition().fileSystem().length() == newLength())
      {
            report->line() << i18ncp("@info/plain", "The file system on partition <filename>%2</filename> already has the requested length of 1 sector.", "The file system on partition <filename>%2</filename> already has the requested length of %1 sectors.", newLength(), partition().deviceNode());
            rval = true;
      }
      else
      {
            report->line() << i18nc("@info/plain", "Resizing file system from %1 to %2 sectors.", partition().fileSystem().length(), newLength());
            
            FileSystem::SupportType support = (newLength() < partition().fileSystem().length()) ? partition().fileSystem().supportShrink() : partition().fileSystem().supportGrow();

            switch(support)
            {
                  case FileSystem::SupportLibParted:
                  {
                        Report* childReport = report->newChild();
                        childReport->line() << i18nc("@info/plain", "Resizing a %1 file system using LibParted internal functions.", partition().fileSystem().name());
                        rval = resizeFileSystemLibParted(*childReport);
                        break;
                  }

                  case FileSystem::SupportExternal:
                  {
                        const qint64 newLengthInByte = Capacity(newLength() * partition().sectorSize()).toInt(Capacity::Byte);
                        rval = partition().fileSystem().resize(*report, partition().deviceNode(), newLengthInByte);
                        break;
                  }

                  default:
                        report->line() << i18nc("@info/plain", "The file system on partition <filename>%1</filename> cannot be resized because there is no support for it.", partition().deviceNode());
                        break;
            }
            
            if (rval)
                  partition().fileSystem().setLastSector(partition().fileSystem().firstSector() + newLength() - 1);
      }
      
      jobFinished(*report, rval);
            
      return rval;
}

bool ResizeFileSystemJob::resizeFileSystemLibParted(Report& report)
{
      bool rval = false;

      if (!openPed(device().deviceNode()))
      {
            report.line() << i18nc("@info/plain", "Resizing file system on partition <filename>%1</filename>: Could not open device <filename>%2</filename>.", partition().deviceNode(), device().deviceNode());
            return false;
      }

      if (PedGeometry* originalGeometry = ped_geometry_new(pedDevice(), partition().fileSystem().firstSector(), partition().fileSystem().length()))
      {
            if (PedFileSystem* pedFileSystem = ped_file_system_open(originalGeometry))
            {
                  if (PedGeometry* resizedGeometry = ped_geometry_new(pedDevice(), partition().fileSystem().firstSector(), newLength()))
                  {
                        PedTimer* pedTimer = ped_timer_new(pedTimerHandler, this);
                        rval = ped_file_system_resize(pedFileSystem, resizedGeometry, pedTimer) && commit();
                        ped_timer_destroy(pedTimer);

                        if (rval)
                              report.line() << i18nc("@info/plain", "Successfully resized file system using LibParted.");
                        else
                              report.line() << i18nc("@info/plain", "Could not resize file system on partition <filename>%1</filename>.", partition().deviceNode());
                  }
                  else
                        report.line() << i18nc("@info/plain", "Could not get geometry for resized partition <filename>%1</filename> while trying to resize the file system.", partition().deviceNode());

                  ped_file_system_close(pedFileSystem);
            }
            else
                  report.line() << i18nc("@info/plain", "Could not open partition <filename>%1</filename> while trying to resize the file system.", partition().deviceNode());
      }
      else
            report.line() << i18nc("@info/plain", "Could not read geometry for partition <filename>%1</filename> while trying to resize the file system.", partition().deviceNode());
      
      closePed();
      
      return rval;
}

00153 QString ResizeFileSystemJob::description() const
{
      if (isMaximizing())
            return i18nc("@info/plain", "Maximize file system on <filename>%1</filename> to fill the partition", partition().deviceNode());
            
      return i18ncp("@info/plain", "Resize file system on partition <filename>%2</filename> to 1 sector", "Resize file system on partition <filename>%2</filename> to %1 sectors", newLength(), partition().deviceNode());
}

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