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kpmcore/src/core/partitiontable.cpp

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/*
SPDX-FileCopyrightText: 2008-2012 Volker Lanz <vl@fidra.de>
SPDX-FileCopyrightText: 2009 Andrew Coles <andrew.i.coles@googlemail.com>
SPDX-FileCopyrightText: 2013-2020 Andrius Štikonas <andrius@stikonas.eu>
SPDX-FileCopyrightText: 2015-2016 Teo Mrnjavac <teo@kde.org>
SPDX-FileCopyrightText: 2016 Chantara Tith <tith.chantara@gmail.com>
SPDX-FileCopyrightText: 2018 Caio Jordão Carvalho <caiojcarvalho@gmail.com>
SPDX-License-Identifier: GPL-3.0-or-later
*/
/** @file
*/
#include "core/partitiontable.h"
#include "core/partition.h"
#include "core/device.h"
#include "core/diskdevice.h"
#include "core/lvmdevice.h"
#include "core/partitionalignment.h"
#include "fs/filesystem.h"
#include "fs/filesystemfactory.h"
#include "util/globallog.h"
#include <utility>
#include <KLocalizedString>
#include <QDebug>
#include <QTextStream>
/** Creates a new PartitionTable object with type MSDOS
@param type name of the PartitionTable type (e.g. "msdos" or "gpt")
*/
PartitionTable::PartitionTable(TableType type, qint64 firstUsable, qint64 lastUsable)
: PartitionNode()
, m_Children()
, m_MaxPrimaries(maxPrimariesForTableType(type))
, m_Type(type)
, m_FirstUsable(firstUsable)
, m_LastUsable(lastUsable)
{
}
/** Copy constructor for PartitionTable.
* @param other the other PartitionTable.
*/
PartitionTable::PartitionTable(const PartitionTable& other)
: PartitionNode()
, m_Children()
, m_MaxPrimaries(other.m_MaxPrimaries)
, m_Type(other.m_Type)
, m_FirstUsable(other.m_FirstUsable)
, m_LastUsable(other.m_LastUsable)
{
for (Partitions::const_iterator it = other.m_Children.constBegin();
it != other.m_Children.constEnd(); ++it)
{
m_Children.append(new Partition(**it, this));
}
}
/** Destroys a PartitionTable object, destroying all children */
PartitionTable::~PartitionTable()
{
clearChildren();
}
/** Gets the number of free sectors before a given child Partition in this PartitionTable.
@param p the Partition for which to get the free sectors before
@returns the number of free sectors before the Partition
*/
qint64 PartitionTable::freeSectorsBefore(const Partition& p) const
{
const Partition* pred = predecessor(p);
// due to the space required for extended boot records the
// below is NOT the same as pred->length()
if (pred && pred->roles().has(PartitionRole::Unallocated))
return p.firstSector() - pred->firstSector();
return 0;
}
/** Gets the number of free sectors after a given child Partition in this PartitionTable.
@param p the Partition for which to get the free sectors after
@returns the number of free sectors after the Partition
*/
qint64 PartitionTable::freeSectorsAfter(const Partition& p) const
{
const Partition* succ = successor(p);
// due to the space required for extended boot records the
// below is NOT the same as succ->length()
if (succ && succ->roles().has(PartitionRole::Unallocated))
return succ->lastSector() - p.lastSector();
return 0;
}
qint64 PartitionTable::freeSectors() const
{
qint64 sectors = 0;
for (const auto &p : children()) {
if (p->roles().has(PartitionRole::Unallocated)) {
sectors += p->length();
}
}
return sectors;
}
/** @return true if the PartitionTable has an extended Partition */
bool PartitionTable::hasExtended() const
{
for (const auto &p : children())
if (p->roles().has(PartitionRole::Extended))
return true;
return false;
}
/** @return pointer to the PartitionTable's extended Partition or nullptr if none exists */
Partition* PartitionTable::extended() const
{
for (const auto &p : children())
if (p->roles().has(PartitionRole::Extended))
return p;
return nullptr;
}
/** Gets valid PartitionRoles for a Partition
@param p the Partition
@return valid roles for the given Partition
*/
PartitionRole::Roles PartitionTable::childRoles(const Partition& p) const
{
Q_ASSERT(p.parent());
PartitionRole::Roles r = p.parent()->isRoot() ? PartitionRole::Primary : PartitionRole::Logical;
if (r == PartitionRole::Primary && hasExtended() == false && tableTypeSupportsExtended(type()))
r |= PartitionRole::Extended;
return r;
}
/** @return the number of primaries in this PartitionTable */
int PartitionTable::numPrimaries() const
{
int result = 0;
for (const auto &p : children())
if (p->roles().has(PartitionRole::Primary) || p->roles().has(PartitionRole::Extended))
result++;
return result;
}
/** Appends a Partition to this PartitionTable
@param partition pointer of the partition to append. Must not be nullptr.
*/
void PartitionTable::append(Partition* partition)
{
children().append(partition);
std::sort(children().begin(), children().end(), [] (const Partition *a, const Partition *b) -> bool {return a->firstSector() < b->firstSector();});
}
/** @param f the flag to get the name for
@returns the flags name or an empty QString if the flag is not known
*/
QString PartitionTable::flagName(Flag f)
{
switch (f) {
case PartitionTable::Flag::Boot:
return xi18nc("@item partition flag", "boot");
case PartitionTable::Flag::Root:
return xi18nc("@item partition flag", "root");
case PartitionTable::Flag::Swap:
return xi18nc("@item partition flag", "swap");
case PartitionTable::Flag::Hidden:
return xi18nc("@item partition flag", "hidden");
case PartitionTable::Flag::Raid:
return xi18nc("@item partition flag", "raid");
case PartitionTable::Flag::Lvm:
return xi18nc("@item partition flag", "lvm");
case PartitionTable::Flag::Lba:
return xi18nc("@item partition flag", "lba");
case PartitionTable::Flag::HpService:
return xi18nc("@item partition flag", "hpservice");
case PartitionTable::Flag::Palo:
return xi18nc("@item partition flag", "palo");
case PartitionTable::Flag::Prep:
return xi18nc("@item partition flag", "prep");
case PartitionTable::Flag::MsftReserved:
return xi18nc("@item partition flag", "msft-reserved");
case PartitionTable::Flag::BiosGrub:
return xi18nc("@item partition flag", "bios-grub");
case PartitionTable::Flag::AppleTvRecovery:
return xi18nc("@item partition flag", "apple-tv-recovery");
case PartitionTable::Flag::Diag:
return xi18nc("@item partition flag", "diag");
case PartitionTable::Flag::LegacyBoot:
return xi18nc("@item partition flag", "legacy-boot");
case PartitionTable::Flag::MsftData:
return xi18nc("@item partition flag", "msft-data");
case PartitionTable::Flag::Irst:
return xi18nc("@item partition flag", "irst");
default:
break;
}
return QString();
}
/** @return list of all flags */
const QList<PartitionTable::Flag> PartitionTable::flagList()
{
QList<PartitionTable::Flag> rval;
rval.append(PartitionTable::Flag::Boot);
rval.append(PartitionTable::Flag::Root);
rval.append(PartitionTable::Flag::Swap);
rval.append(PartitionTable::Flag::Hidden);
rval.append(PartitionTable::Flag::Raid);
rval.append(PartitionTable::Flag::Lvm);
rval.append(PartitionTable::Flag::Lba);
rval.append(PartitionTable::Flag::HpService);
rval.append(PartitionTable::Flag::Palo);
rval.append(PartitionTable::Flag::Prep);
rval.append(PartitionTable::Flag::MsftReserved);
rval.append(PartitionTable::Flag::BiosGrub);
rval.append(PartitionTable::Flag::AppleTvRecovery);
rval.append(PartitionTable::Flag::Diag);
rval.append(PartitionTable::Flag::LegacyBoot);
rval.append(PartitionTable::Flag::MsftData);
rval.append(PartitionTable::Flag::Irst);
return rval;
}
/** @param flags the flags to get the names for
@returns QStringList of the flags' names
*/
QStringList PartitionTable::flagNames(Flags flags)
{
QStringList rval;
int f = 1;
QString s;
while (!(s = flagName(static_cast<PartitionTable::Flag>(f))).isEmpty()) {
if (flags & f)
rval.append(s);
f <<= 1;
}
return rval;
}
/** @param list QStringList of the flags' names
@returns flags corresponding to names
*/
PartitionTable::Flags PartitionTable::flagsFromList(const QStringList list)
{
Flags flags;
for (const auto &flag : flagList())
if (list.contains(flagName(flag)))
flags.setFlag(flag);
return flags;
}
bool PartitionTable::getUnallocatedRange(const Device& d, PartitionNode& parent, qint64& start, qint64& end)
{
if (d.type() == Device::Type::Disk_Device) {
const DiskDevice& device = dynamic_cast<const DiskDevice&>(d);
if (!parent.isRoot()) {
Partition* extended = dynamic_cast<Partition*>(&parent);
if (extended == nullptr) {
qWarning() << "extended is null. start: " << start << ", end: " << end << ", device: " << device.deviceNode();
return false;
}
// Leave a track (cylinder aligned) or sector alignment sectors (sector based) free at the
// start for a new partition's metadata
start += device.partitionTable()->type() == PartitionTable::msdos ? device.sectorsPerTrack() : PartitionAlignment::sectorAlignment(device);
// .. and also at the end for the metadata for a partition to follow us, if we're not
// at the end of the extended partition
if (end < extended->lastSector())
end -= device.partitionTable()->type() == PartitionTable::msdos ? device.sectorsPerTrack() : PartitionAlignment::sectorAlignment(device);
}
return end - start + 1 >= PartitionAlignment::sectorAlignment(device);
} else if (d.type() == Device::Type::LVM_Device || d.type() == Device::Type::SoftwareRAID_Device) {
if (end - start + 1 > 0) {
return true;
}
}
return false;
}
/** Creates a new unallocated Partition on the given Device.
@param device the Device to create the new Partition on
@param parent the parent PartitionNode for the new Partition
@param start the new Partition's start sector
@param end the new Partition's end sector
@return pointer to the newly created Partition object or nullptr if the Partition could not be created
*/
Partition* createUnallocated(const Device& device, PartitionNode& parent, qint64 start, qint64 end)
{
PartitionRole::Roles r = PartitionRole::Unallocated;
if (!parent.isRoot())
r |= PartitionRole::Logical;
// Mark unallocated space in LVM VG as LVM LV so that pasting can be easily disabled (it does not work yet)
if (device.type() == Device::Type::LVM_Device)
r |= PartitionRole::Lvm_Lv;
if (!PartitionTable::getUnallocatedRange(device, parent, start, end))
return nullptr;
return new Partition(&parent, device, PartitionRole(r), FileSystemFactory::create(FileSystem::Type::Unknown, start, end, device.logicalSize()), start, end, QString());
}
/** Removes all unallocated children from a PartitionNode
@param p pointer to the parent to remove unallocated children from
*/
void PartitionTable::removeUnallocated(PartitionNode* p)
{
Q_ASSERT(p);
qint32 i = 0;
while (i < p->children().size()) {
Partition* child = p->children()[i];
if (child->roles().has(PartitionRole::Unallocated)) {
p->remove(child);
delete child;
continue;
}
if (child->roles().has(PartitionRole::Extended))
removeUnallocated(child);
i++;
}
}
/**
@overload
*/
void PartitionTable::removeUnallocated()
{
removeUnallocated(this);
}
/** Inserts unallocated children for a Device's PartitionTable with the given parent.
This method inserts unallocated Partitions for a parent, usually the Device this
PartitionTable is on. It will also insert unallocated Partitions in any extended
Partitions it finds.
@warning This method assumes that no unallocated Partitions exist when it is called.
@param d the Device this PartitionTable and @p p are on
@param p the parent PartitionNode (may be this or an extended Partition)
@param start the first sector to begin looking for free space
*/
void PartitionTable::insertUnallocated(const Device& d, PartitionNode* p, qint64 start)
{
Q_ASSERT(p);
qint64 lastEnd = start;
if (d.type() == Device::Type::LVM_Device && !p->children().isEmpty()) {
// rearranging the sectors of all partitions to keep unallocated space at the end
lastEnd = 0;
std::sort(children().begin(), children().end(), [](const Partition* p1, const Partition* p2) { return p1->deviceNode() < p2->deviceNode(); });
for (const auto &child : children()) {
qint64 totalSectors = child->length();
child->setFirstSector(lastEnd);
child->setLastSector(lastEnd + totalSectors - 1);
lastEnd += totalSectors;
}
} else {
const auto pChildren = p->children();
for (const auto &child : pChildren) {
p->insert(createUnallocated(d, *p, lastEnd, child->firstSector() - 1));
if (child->roles().has(PartitionRole::Extended))
insertUnallocated(d, child, child->firstSector());
lastEnd = child->lastSector() + 1;
}
}
if (d.type() == Device::Type::LVM_Device)
{
const LvmDevice& lvm = static_cast<const LvmDevice&>(d);
p->insert(createUnallocated(d, *p, lastEnd, lastEnd + lvm.freePE() - 1));
}
else
{
// Take care of the free space between the end of the last child and the end
// of the device or the extended partition.
qint64 parentEnd = lastUsable();
if (!p->isRoot()) {
Partition* extended = dynamic_cast<Partition*>(p);
parentEnd = extended ? extended->lastSector() : -1;
Q_ASSERT(extended);
}
if (parentEnd >= firstUsable() && parentEnd >= lastEnd)
p->insert(createUnallocated(d, *p, lastEnd, parentEnd));
}
}
/** Updates the unallocated Partitions for this PartitionTable.
@param d the Device this PartitionTable is on
*/
void PartitionTable::updateUnallocated(const Device& d)
{
removeUnallocated();
insertUnallocated(d, this, firstUsable());
}
qint64 PartitionTable::defaultFirstUsable(const Device& d, TableType t)
{
Q_UNUSED(t)
if (d.type() == Device::Type::LVM_Device || d.type() == Device::Type::SoftwareRAID_Device || t == PartitionTable::TableType::none) {
return 0;
}
const DiskDevice& diskDevice = dynamic_cast<const DiskDevice&>(d);
return PartitionAlignment::sectorAlignment(diskDevice);
}
qint64 PartitionTable::defaultLastUsable(const Device& d, TableType t)
{
if (t == gpt)
return d.totalLogical() - 1 - 32 - 1;
return d.totalLogical() - 1;
}
static struct {
const QLatin1String name; /**< name of partition table type */
quint32 maxPrimaries; /**< max numbers of primary partitions supported */
bool canHaveExtended; /**< does partition table type support extended partitions */
bool isReadOnly; /**< does KDE Partition Manager support this only in read only mode */
PartitionTable::TableType type; /**< enum type */
} tableTypes[] = {
{ QLatin1String("aix"), 4, false, true, PartitionTable::TableType::aix },
{ QLatin1String("bsd"), 8, false, true, PartitionTable::TableType::bsd },
{ QLatin1String("dasd"), 1, false, true, PartitionTable::TableType::dasd },
{ QLatin1String("msdos"), 4, true, false, PartitionTable::TableType::msdos },
{ QLatin1String("msdos"), 4, true, false, PartitionTable::TableType::msdos_sectorbased },
{ QLatin1String("dos"), 4, true, false, PartitionTable::TableType::msdos_sectorbased },
{ QLatin1String("dvh"), 16, true, true, PartitionTable::TableType::dvh },
{ QLatin1String("gpt"), 128, false, false, PartitionTable::TableType::gpt },
{ QLatin1String("loop"), 1, false, true, PartitionTable::TableType::loop },
{ QLatin1String("mac"), 0xffff, false, true, PartitionTable::TableType::mac },
{ QLatin1String("pc98"), 16, false, true, PartitionTable::TableType::pc98 },
{ QLatin1String("amiga"), 128, false, true, PartitionTable::TableType::amiga },
{ QLatin1String("sun"), 8, false, true, PartitionTable::TableType::sun },
{ QLatin1String("vmd"), 0xffff, false, false, PartitionTable::TableType::vmd },
{ QLatin1String("none"), 1, false, false, PartitionTable::TableType::none },
};
PartitionTable::TableType PartitionTable::nameToTableType(const QString& n)
{
for (const auto &type : tableTypes)
if (n == type.name)
return type.type;
return PartitionTable::TableType::unknownTableType;
}
QString PartitionTable::tableTypeToName(TableType l)
{
for (const auto &type : tableTypes)
if (l == type.type)
return type.name;
return xi18nc("@item partition table name", "unknown");
}
qint32 PartitionTable::maxPrimariesForTableType(TableType l)
{
for (const auto &type : tableTypes)
if (l == type.type)
return type.maxPrimaries;
return 1;
}
bool PartitionTable::tableTypeSupportsExtended(TableType l)
{
for (const auto &type : tableTypes)
if (l == type.type)
return type.canHaveExtended;
return false;
}
bool PartitionTable::tableTypeIsReadOnly(TableType l)
{
for (const auto &type : tableTypes)
if (l == type.type)
return type.isReadOnly;
return false;
}
/** Simple heuristic to determine if the PartitionTable is sector aligned (i.e.
if its Partitions begin at sectors evenly divisable by PartitionAlignment::sectorAlignment().
@return true if is sector aligned, otherwise false
*/
bool PartitionTable::isSectorBased(const Device& d) const
{
if (d.type() == Device::Type::Disk_Device) {
const DiskDevice& diskDevice = dynamic_cast<const DiskDevice&>(d);
if (type() == PartitionTable::msdos) {
// the default for empty partition tables is sector based
if (numPrimaries() == 0)
return true;
quint32 numCylinderAligned = 0;
quint32 numSectorAligned = 0;
// see if we have more cylinder aligned partitions than sector
// aligned ones.
for (const auto &p : children()) {
if (p->firstSector() % PartitionAlignment::sectorAlignment(diskDevice) == 0)
numSectorAligned++;
else if (p->firstSector() % diskDevice.cylinderSize() == 0)
numCylinderAligned++;
}
return numSectorAligned >= numCylinderAligned;
}
return type() == PartitionTable::msdos_sectorbased;
}
return false;
}
void PartitionTable::setType(const Device& d, TableType t)
{
setFirstUsableSector(defaultFirstUsable(d, t));
setLastUsableSector(defaultLastUsable(d, t));
m_Type = t;
updateUnallocated(d);
}
QTextStream& operator<<(QTextStream& stream, const PartitionTable& ptable)
{
stream << "type: \"" << ptable.typeName() << "\"\n"
<< "align: \"" << (ptable.type() == PartitionTable::msdos ? "cylinder" : "sector") << "\"\n"
<< "\n# number start end type roles label flags\n";
QList<const Partition*> partitions;
for (const auto &p : ptable.children()) {
if (!p->roles().has(PartitionRole::Unallocated)) {
partitions.append(p);
if (p->roles().has(PartitionRole::Extended)) {
const auto partChildren = p->children();
for (const auto &child : partChildren) {
if (!child->roles().has(PartitionRole::Unallocated))
partitions.append(child);
}
}
}
}
std::sort(partitions.begin(), partitions.end(), [](const Partition* p1, const Partition* p2) { return p1->number() < p2->number(); });
for (const auto &p : std::as_const(partitions))
stream << *p;
return stream;
}
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