347 lines
10 KiB
C++
347 lines
10 KiB
C++
/***************************************************************************
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* Copyright (C) 2008 by Volker Lanz <vl@fidra.de> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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***************************************************************************/
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#include "core/partition.h"
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#include "core/device.h"
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#include "fs/filesystem.h"
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#include "fs/filesystemfactory.h"
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#include "util/externalcommand.h"
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#include <QString>
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#include <QStringList>
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#include <QFileInfo>
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#include <kdebug.h>
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#include <klocale.h>
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/** Creates a new Partition object.
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@param parent the Partition's parent. May be another Partition (for logicals) or a PartitionTable. Must not be NULL.
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@param device the Device this Partition is on.
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@param role the Partition's role(s)
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@param fs pointer to the Partition's FileSystem object. The Partition object will take ownership of this.
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@param sectorStart the first sector of the Partition on its Device
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@param sectorEnd the last sector of the Partition on its Device
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@param number the Partition's device number, e.g. 7 for /dev/sdd7
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@param availableFlags the flags available for this Partition according to libparted
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@param mountPoints string list of mount points found for this Partition
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@param mounted true if the Partition is mounted
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@param activeFlags active flags for this Partition according to libparted
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@param state the Partition's state
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*/
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Partition::Partition(PartitionNode* parent, const Device& device, const PartitionRole& role, FileSystem* fs, qint64 sectorStart, qint64 sectorEnd, qint32 number, PartitionTable::Flags availableFlags, const QStringList& mountPoints, bool mounted, PartitionTable::Flags activeFlags, State state) :
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PartitionNode(),
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m_Number(number),
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m_Children(),
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m_Parent(parent),
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m_FileSystem(fs),
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m_Roles(role),
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m_FirstSector(sectorStart),
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m_LastSector(sectorEnd),
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m_DevicePath(device.deviceNode()),
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m_MountPoints(mountPoints),
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m_AvailableFlags(availableFlags),
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m_ActiveFlags(activeFlags),
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m_IsMounted(mounted),
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m_SectorSize(device.sectorSize()),
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m_State(state)
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{
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Q_ASSERT(m_Parent);
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}
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/** Destroys a Partition, destroying its children and its FileSystem */
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Partition::~Partition()
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{
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clearChildren();
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deleteFileSystem();
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}
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/** @param other Partition to copy
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*/
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Partition::Partition(const Partition& other) :
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PartitionNode(),
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m_Number(other.m_Number),
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m_Children(),
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m_Parent(other.m_Parent),
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m_FileSystem(FileSystemFactory::create(other.fileSystem())),
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m_Roles(other.m_Roles),
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m_FirstSector(other.m_FirstSector),
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m_LastSector(other.m_LastSector),
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m_DevicePath(other.m_DevicePath),
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m_MountPoints(other.m_MountPoints),
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m_AvailableFlags(other.m_AvailableFlags),
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m_ActiveFlags(other.m_ActiveFlags),
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m_IsMounted(other.m_IsMounted),
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m_SectorSize(other.m_SectorSize),
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m_State(other.m_State)
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{
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foreach(const Partition* child, other.children())
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{
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Partition* p = new Partition(*child);
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p->setParent(this);
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m_Children.append(p);
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}
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}
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/** @param other Partition to assign from */
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Partition& Partition::operator=(const Partition& other)
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{
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if (&other == this)
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return *this;
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clearChildren();
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foreach(const Partition* child, other.children())
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{
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Partition* p = new Partition(*child);
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p->setParent(this);
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m_Children.append(p);
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}
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m_Number = other.m_Number;
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m_FileSystem = FileSystemFactory::create(other.fileSystem());
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m_Roles = other.m_Roles;
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m_FirstSector = other.m_FirstSector;
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m_LastSector = other.m_LastSector;
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m_DevicePath = other.m_DevicePath;
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m_MountPoints = other.m_MountPoints;
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m_AvailableFlags = other.m_AvailableFlags;
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m_ActiveFlags = other.m_ActiveFlags;
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m_IsMounted = other.m_IsMounted;
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m_SectorSize = other.m_SectorSize;
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m_State = other.m_State;
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return *this;
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}
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/** @return a short descriptive text or, in case the Partition has StateNone, its device node. */
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QString Partition::deviceNode() const
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{
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if (roles().has(PartitionRole::None) || roles().has(PartitionRole::Unallocated))
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return i18nc("@item partition name", "unallocated");
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if (state() == StateNew)
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return i18nc("@item partition name", "New Partition");
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if (state() == StateRestore)
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return i18nc("@item partition name", "Restored Partition");
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QString res = m_DevicePath + QString::number(number());
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if (state() == StateCopy)
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return i18nc("@item partition name", "Copy of %1", res);
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return res;
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}
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/** @return the sectors used in the Partition's FileSystem or, in case of an extended partition, the sum of used sectors of the Partition's children */
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qint64 Partition::sectorsUsed() const
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{
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if (!roles().has(PartitionRole::Extended))
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return fileSystem().sectorsUsed();
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qint64 result = 0;
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foreach (const Partition* p, children())
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if (!p->roles().has(PartitionRole::Unallocated))
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result += p->length();
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return result;
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}
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/** @return the minimum number of sectors this Partition must be long */
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qint64 Partition::minimumSectors() const
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{
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return fileSystem().minCapacity() / sectorSize();
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}
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/** @return the maximum number of sectors this Partition may be long */
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qint64 Partition::maximumSectors() const
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{
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return fileSystem().maxCapacity() / sectorSize();
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}
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/** Adjusts the numbers of logical Partitions for an extended Partition.
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This is required if a logical Partition is deleted or inserted because logicals must be numberd from
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5 onwards without a gap. So if the user deletes Partition number 7 and there is a number 8, 8 becomes the
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"new" 7. And since this happens somewhere in the middle of a DeleteOperation, we have to adjust to that so the
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next Job still finds the Partition it wants to deal with.
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@param deletedNumber the number of a deleted logical or -1 if none has been deleted
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@param insertedNumber the number of an inserted logical or -1 if none has been inserted
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*/
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void Partition::adjustLogicalNumbers(qint32 deletedNumber, qint32 insertedNumber)
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{
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if (!roles().has(PartitionRole::Extended))
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return;
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foreach (Partition* p, children())
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{
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if (deletedNumber > 4 && p->number() > deletedNumber)
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p->setNumber(p->number() - 1);
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else if (insertedNumber > 4 && p->number() >= insertedNumber)
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p->setNumber(p->number() + 1);
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}
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}
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/** @return the highest sector number an extended Partition can begin at */
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qint64 Partition::maxFirstSector() const
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{
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qint64 rval = -1;
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foreach (const Partition* child, children())
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if (!child->roles().has(PartitionRole::Unallocated) && (child->firstSector() < rval || rval == -1))
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rval = child->firstSector();
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return rval;
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}
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/** @return the lowest sector number an extended Partition can end at */
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qint64 Partition::minLastSector() const
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{
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qint64 rval = -1;
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foreach (const Partition* child, children())
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if (!child->roles().has(PartitionRole::Unallocated) && child->lastSector() > rval)
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rval = child->lastSector();
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return rval;
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}
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/** @return true if the Partition has children */
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bool Partition::hasChildren() const
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{
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foreach (const Partition* child, children())
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if (!child->roles().has(PartitionRole::Unallocated))
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return true;
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return false;
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}
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/** Sets an extended Partition to mounted if any of its children are mounted */
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void Partition::checkChildrenMounted()
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{
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bool isBusy = false;
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foreach (const Partition* child, children())
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if (child->isMounted())
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{
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isBusy = true;
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break;
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}
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setMounted(isBusy);
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}
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/** @return true if this Partition can be mounted */
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bool Partition::canMount() const
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{
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// cannot mount if already mounted
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if (isMounted())
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return false;
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// if the file system says we can mount without mount points, that's fine
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// (this is the case for swap only, actually)
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if (fileSystem().canMount(deviceNode()))
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return true;
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// cannot mount if we have no mount points
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return !mountPoints().isEmpty();
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}
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/** @return true if this Partition can be unmounted */
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bool Partition::canUnmount() const
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{
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return !roles().has(PartitionRole::Extended) && isMounted();
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}
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/** Tries to mount a Partition.
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@return true on success
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*/
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bool Partition::mount()
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{
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if (isMounted())
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return false;
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bool success = false;
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if (fileSystem().canMount(deviceNode()))
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success = fileSystem().mount(deviceNode());
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else
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{
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foreach(const QString& mp, mountPoints())
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{
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ExternalCommand mountCmd("mount", QStringList() << deviceNode() << mp);
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if (mountCmd.run() && mountCmd.exitCode() == 0)
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success = true;
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}
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}
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setMounted(success);
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return success;
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}
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/** Tries to unmount a Partition.
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@return true on success
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*/
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bool Partition::unmount()
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{
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if (!isMounted() || mountPoints().size() == 0)
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return false;
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bool success = true;
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if (fileSystem().canUnmount(deviceNode()))
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success = fileSystem().unmount(deviceNode());
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else
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{
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foreach(const QString& mp, mountPoints())
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{
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ExternalCommand umountCmd("umount", QStringList() << mp);
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if (!umountCmd.run() || umountCmd.exitCode() != 0)
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success = false;
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}
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}
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setMounted(!success);
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return success;
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}
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void Partition::deleteFileSystem()
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{
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delete m_FileSystem;
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m_FileSystem = NULL;
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}
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void Partition::setFileSystem(FileSystem* fs)
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{
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m_FileSystem = fs;
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}
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void Partition::move(qint64 newStartSector)
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{
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const qint64 savedLength = length();
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setFirstSector(newStartSector);
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setLastSector(newStartSector + savedLength - 1);
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}
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