andrius
/
kpmcore
1
0
Fork 0
Code Pull Requests Releases Activity

Construct PartitionTable and Partition in LvmDevice

This commit is contained in:
Chantara Tith 2016-06-10 21:03:17 +07:00 committed by Andrius Štikonas
parent 103b5343d6
commit bd892fd2d6
2 changed files with 117 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

118
src/core/lvmdevice.cpp
View File

@ -1,6 +1,5 @@
/*************************************************************************
* Copyright (C) 2008 by Volker Lanz <vl@fidra.de> *
* Copyright (C) 2016 by Andrius Štikonas <andrius@stikonas.eu> *
* Copyright (C) 2016 by Chantara Tith <tith.chantara@gmail.com> *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
@ -17,11 +16,15 @@
*************************************************************************/
#include "core/lvmdevice.h"
#include "fs/filesystem.h"
#include "fs/filesystemfactory.h"
#include "core/partition.h"
#include "core/partitiontable.h"
#include "util/externalcommand.h"
#include <QRegularExpression>
#include <QStringList>
/** Constructs a representation of LVM device with functionning LV as Partition
@param name Volume Group name
@ -37,20 +40,100 @@ LvmDevice::LvmDevice(const QString& name, const QString& iconname)
, m_totalPE(getTotalPE(name))
, m_allocPE(getAllocatedPE(name))
, m_freePE(getFreePE(name))
, m_UUID(getUUID(name))
{
//called to initialize member variables
//refresh();
initPartitions();
}
/*
void LvmDevice::refresh() const
void LvmDevice::update() const
{
}
*/
void LvmDevice::initPartitions() const
void LvmDevice::initPartitions()
{
//PartitionTable* pTable = new PartitionTable(PartitionTable::TableType::vmd,0, )
qint64 firstUsable = 0;
qint64 lastusable = totalPE() - 1;
PartitionTable* pTable = new PartitionTable(PartitionTable::vmd, firstUsable, lastusable);
foreach (Partition* p, scanPartitions(*this, pTable)) {
pTable->append(p);
}
this->setPartitionTable(pTable);
}
/**
return sorted Partition(LV) Array
*/
QList<Partition*> LvmDevice::scanPartitions(const Device& dev, PartitionTable* pTable) const
{
QList<Partition*> pList;
QList<QString> lvNodeList;
ExternalCommand cmd(QStringLiteral("lvm"),
{ QStringLiteral("lvdisplay"),
QStringLiteral("--units"),
QStringLiteral("B"),
dev.name()});
if (cmd.run(-1) && cmd.exitCode() == 0) {
QRegularExpression pathRE(QStringLiteral("LV Path\\h+((\\w|\/)+)"));
QRegularExpressionMatchIterator pathMatch = pathRE.globalMatch(cmd.output());
while (pathMatch.hasNext()) {
QRegularExpressionMatch path = pathMatch.next();
lvNodeList << path.captured(1);
}
}
foreach (QString lvNode, lvNodeList) {
pList.append(this->scanPartition(lvNode, dev, pTable));
}
return pList;
}
/**
return sorted Partition(LV) Array
*/
Partition* LvmDevice::scanPartition(const QString& lvPath, const Device& dev, PartitionTable* pTable) const
{
qint64 startSector;
qint64 endSector;
QString mountPoint = QString();
bool mounted = false;
ExternalCommand cmd(QStringLiteral("lvm"),
{ QStringLiteral("lvdisplay"),
QStringLiteral("--units"),
QStringLiteral("B"),
QStringLiteral("--maps"),
lvPath});
if (cmd.run(-1) && cmd.exitCode() == 0) {
//TODO: regex for first and last sector of the LV
//TODO: stringing PE into one large contingiuous array of PE ??
QRegularExpression re(QStringLiteral("Physical extents\\h+(\\d+)\\sto\\s(\\d+)"));
QRegularExpressionMatch match = re.match(cmd.output());
if (match.hasMatch()) {
startSector = match.captured(1).toLongLong();
endSector = match.captured(2).toLongLong();
}
}
FileSystem* fs = FileSystemFactory::create(FileSystem::detectFileSystem(lvPath), startSector, endSector);
Partition* part = new Partition(pTable,
dev,
PartitionRole(PartitionRole::Lvm_Lv),
fs,
startSector,
endSector,
lvPath,
PartitionTable::Flag::FlagLvm,
mountPoint,
mounted);
return part;
}
qint32 LvmDevice::getPeSize(const QString& vgname)
@ -95,7 +178,7 @@ qint32 LvmDevice::getAllocatedPE(const QString& vgname)
QStringLiteral("B"),
vgname});
if (cmd.run(-1) && cmd.exitCode() == 0) {
QRegularExpression re(QStringLiteral("Alloc PE.*\\h+(\\d+)"));
QRegularExpression re(QStringLiteral("Alloc PE / Size\\h+(\\d+)"));
QRegularExpressionMatch match = re.match(cmd.output());
if (match.hasMatch()) {
return match.captured(1).toInt();
@ -112,7 +195,7 @@ qint32 LvmDevice::getFreePE(const QString& vgname)
QStringLiteral("B"),
vgname});
if (cmd.run(-1) && cmd.exitCode() == 0) {
QRegularExpression re(QStringLiteral("Free PE.*\\h+(\\d+)"));
QRegularExpression re(QStringLiteral("Free PE / Size\\h+(\\d+)"));
QRegularExpressionMatch match = re.match(cmd.output());
if (match.hasMatch()) {
return match.captured(1).toInt();
@ -120,3 +203,20 @@ qint32 LvmDevice::getFreePE(const QString& vgname)
}
return -1;
}
QString LvmDevice::getUUID(const QString& vgname)
{
ExternalCommand cmd(QStringLiteral("lvm"),
{ QStringLiteral("vgdisplay"),
QStringLiteral("--units"),
QStringLiteral("B"),
vgname});
if (cmd.run(-1) && cmd.exitCode() == 0) {
QRegularExpression re(QStringLiteral("LV UUID\\h+(\\w+)"));
QRegularExpressionMatch match = re.match(cmd.output());
if (match.hasMatch()) {
return match.captured(1);
}
}
return QStringLiteral("---");
}

10
src/core/lvmdevice.h
View File

@ -67,9 +67,14 @@ public:
static qint32 getTotalPE(const QString& name);
static qint32 getAllocatedPE(const QString& name);
static qint32 getFreePE(const QString& name);
static QString getUUID(const QString& name);
protected:
// void init() const;
void initPartitions() const;
void update();
void initPartitions();
public:
QList<Partition*> scanPartitions(const Device& dev, PartitionTable* pTable) const;
Partition* scanPartition(const QString& lvPath, const Device& dev, PartitionTable* pTable) const;
private:
@ -77,6 +82,7 @@ private:
qint32 m_totalPE;
qint32 m_allocPE;
qint32 m_freePE;
QString m_UUID;
};
#endif