305 lines
10 KiB
C++
305 lines
10 KiB
C++
/*
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SPDX-FileCopyrightText: 2012-2018 Andrius Štikonas <andrius@stikonas.eu>
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SPDX-FileCopyrightText: 2016 Chantara Tith <tith.chantara@gmail.com>
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SPDX-FileCopyrightText: 2016 Teo Mrnjavac <teo@kde.org>
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SPDX-FileCopyrightText: 2018 Caio Jordão Carvalho <caiojcarvalho@gmail.com>
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SPDX-FileCopyrightText: 2019 Yuri Chornoivan <yurchor@ukr.net>
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SPDX-FileCopyrightText: 2020 Arnaud Ferraris <arnaud.ferraris@collabora.com>
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SPDX-FileCopyrightText: 2020 Gaël PORTAY <gael.portay@collabora.com>
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SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "fs/lvm2_pv.h"
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#include "core/device.h"
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#include "util/externalcommand.h"
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#include "util/capacity.h"
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#include <QString>
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#include <KLocalizedString>
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namespace FS
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{
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FileSystem::CommandSupportType lvm2_pv::m_GetUsed = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_GetLabel = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_Create = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_Grow = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_Shrink = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_Move = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_Check = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_Copy = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_Backup = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_SetLabel = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_UpdateUUID = FileSystem::cmdSupportNone;
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FileSystem::CommandSupportType lvm2_pv::m_GetUUID = FileSystem::cmdSupportNone;
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lvm2_pv::lvm2_pv(qint64 firstsector, qint64 lastsector,
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qint64 sectorsused, const QString& label, const QVariantMap& features)
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: FileSystem(firstsector, lastsector, sectorsused, label, features, FileSystem::Type::Lvm2_PV)
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, m_PESize(0)
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, m_TotalPE(0)
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, m_AllocatedPE(0)
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{
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}
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void lvm2_pv::init()
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{
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CommandSupportType lvmFound = findExternal(QStringLiteral("lvm"), {}, 3) ? cmdSupportFileSystem : cmdSupportNone;
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m_Create = lvmFound;
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m_Check = lvmFound;
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m_Grow = lvmFound;
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m_Shrink = lvmFound;
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m_UpdateUUID = lvmFound;
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m_GetUsed = lvmFound;
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m_Move = (m_Check != cmdSupportNone) ? cmdSupportCore : cmdSupportNone;
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m_GetLabel = cmdSupportCore;
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m_Backup = cmdSupportCore;
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m_GetUUID = cmdSupportCore;
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m_GetLabel = cmdSupportNone;
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m_Copy = cmdSupportNone; // Copying PV can confuse LVM
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}
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void lvm2_pv::scan(const QString& deviceNode)
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{
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getPESize(deviceNode);
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m_AllocatedPE = getAllocatedPE(deviceNode);
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m_TotalPE = getTotalPE(deviceNode);
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}
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bool lvm2_pv::supportToolFound() const
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{
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return
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m_GetUsed != cmdSupportNone &&
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m_Create != cmdSupportNone &&
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m_Check != cmdSupportNone &&
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m_UpdateUUID != cmdSupportNone &&
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m_Grow != cmdSupportNone &&
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m_Shrink != cmdSupportNone &&
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m_Move != cmdSupportNone &&
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m_Backup != cmdSupportNone &&
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m_GetUUID != cmdSupportNone;
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}
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FileSystem::SupportTool lvm2_pv::supportToolName() const
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{
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return SupportTool(QStringLiteral("lvm2"), QUrl(QStringLiteral("https://sourceware.org/lvm2/")));
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}
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qint64 lvm2_pv::maxCapacity() const
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{
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return Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::EiB);
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}
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qint64 lvm2_pv::readUsedCapacity(const QString& deviceNode) const
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{
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QString pvUsed = getpvField(QStringLiteral("pv_used"), deviceNode);
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QString metadataOffset = getpvField(QStringLiteral("pe_start"), deviceNode);
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return pvUsed.isEmpty() ? -1 : pvUsed.toLongLong() + metadataOffset.toLongLong();
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}
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bool lvm2_pv::check(Report& report, const QString& deviceNode) const
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{
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ExternalCommand cmd(report, QStringLiteral("lvm"), { QStringLiteral("pvck"), QStringLiteral("--verbose"), deviceNode });
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return cmd.run(-1) && cmd.exitCode() == 0;
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}
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bool lvm2_pv::create(Report& report, const QString& deviceNode)
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{
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ExternalCommand cmd(report, QStringLiteral("lvm"), { QStringLiteral("pvcreate"), QStringLiteral("--force"), deviceNode });
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return cmd.run(-1) && cmd.exitCode() == 0;
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}
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bool lvm2_pv::remove(Report& report, const QString& deviceNode) const
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{
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ExternalCommand cmd(report, QStringLiteral("lvm"), { QStringLiteral("pvremove"), QStringLiteral("--force"), QStringLiteral("--force"), QStringLiteral("--yes"), deviceNode });
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return cmd.run(-1) && cmd.exitCode() == 0;
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}
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bool lvm2_pv::resize(Report& report, const QString& deviceNode, qint64 length) const
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{
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bool rval = true;
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qint64 metadataOffset = getpvField(QStringLiteral("pe_start"), deviceNode).toLongLong();
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qint64 lastPE = getTotalPE(deviceNode) - 1; // starts from 0
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if (lastPE > 0) { // make sure that the PV is already in a VG
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qint64 targetPE = (length - metadataOffset) / peSize() - 1; // starts from 0
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if (targetPE < lastPE) { //shrinking FS
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qint64 firstMovedPE = qMax(targetPE + 1, getAllocatedPE(deviceNode)); // starts from 1
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ExternalCommand moveCmd(report,
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QStringLiteral("lvm"), {
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QStringLiteral("pvmove"),
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QStringLiteral("--alloc"),
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QStringLiteral("anywhere"),
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deviceNode + QStringLiteral(":") + QString::number(firstMovedPE) + QStringLiteral("-") + QString::number(lastPE),
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deviceNode + QStringLiteral(":") + QStringLiteral("0-") + QString::number(firstMovedPE - 1)
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});
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rval = moveCmd.run(-1) && (moveCmd.exitCode() == 0 || moveCmd.exitCode() == 5); // FIXME: exit code 5: NO data to move
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}
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}
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ExternalCommand cmd(report, QStringLiteral("lvm"), {
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QStringLiteral("pvresize"),
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QStringLiteral("--yes"),
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QStringLiteral("--setphysicalvolumesize"),
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QString::number(length) + QStringLiteral("B"),
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deviceNode });
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return rval && cmd.run(-1) && cmd.exitCode() == 0;
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}
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bool lvm2_pv::resizeOnline(Report& report, const QString& deviceNode, const QString& mountPoint, qint64 length) const
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{
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Q_UNUSED(mountPoint)
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return resize(report, deviceNode, length);
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}
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bool lvm2_pv::updateUUID(Report& report, const QString& deviceNode) const
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{
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ExternalCommand cmd(report, QStringLiteral("lvm"), { QStringLiteral("pvchange"), QStringLiteral("--uuid"), deviceNode });
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return cmd.run(-1) && cmd.exitCode() == 0;
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}
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QString lvm2_pv::readUUID(const QString& deviceNode) const
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{
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return getpvField(QStringLiteral("pv_uuid"), deviceNode);
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}
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bool lvm2_pv::mount(Report& report, const QString& deviceNode, const QString& mountPoint)
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{
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Q_UNUSED(report)
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Q_UNUSED(deviceNode)
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Q_UNUSED(mountPoint)
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return false;
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}
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bool lvm2_pv::unmount(Report& report, const QString& deviceNode)
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{
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Q_UNUSED(deviceNode)
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Q_UNUSED(report)
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return false;
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}
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bool lvm2_pv::canMount(const QString& deviceNode, const QString& mountPoint) const
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{
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Q_UNUSED(deviceNode)
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Q_UNUSED(mountPoint)
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return false;
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}
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bool lvm2_pv::canUnmount(const QString& deviceNode) const
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{
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Q_UNUSED(deviceNode)
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return false;
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}
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qint64 lvm2_pv::getTotalPE(const QString& deviceNode)
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{
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QString pvPeCount = getpvField(QStringLiteral("pv_pe_count"), deviceNode);
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return pvPeCount.isEmpty() ? -1 : pvPeCount.toLongLong();
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}
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qint64 lvm2_pv::getAllocatedPE(const QString& deviceNode)
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{
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QString pvPeAllocCount = getpvField(QStringLiteral("pv_pe_alloc_count"), deviceNode);
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return pvPeAllocCount.isEmpty() ? -1 : pvPeAllocCount.toLongLong();
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}
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void lvm2_pv::getPESize(const QString& deviceNode)
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{
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QString vgExtentSize = getpvField(QStringLiteral("vg_extent_size"), deviceNode);
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m_PESize = vgExtentSize.isEmpty() ? -1 : vgExtentSize.toLongLong();
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}
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/** Get pvs command output with field name
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*
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* @param fieldName LVM field name
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* @param deviceNode path to PV
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* @return raw output of pvs command, usually with many spaces
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*/
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QString lvm2_pv::getpvField(const QString& fieldName, const QString& deviceNode)
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{
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QStringList args = { QStringLiteral("pvs"),
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QStringLiteral("--foreign"),
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QStringLiteral("--readonly"),
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QStringLiteral("--noheadings"),
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QStringLiteral("--units"),
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QStringLiteral("B"),
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QStringLiteral("--nosuffix"),
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QStringLiteral("--options"),
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fieldName };
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if (!deviceNode.isEmpty()) {
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args << deviceNode;
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}
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ExternalCommand cmd(QStringLiteral("lvm"), args, QProcess::ProcessChannelMode::SeparateChannels);
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if (cmd.run(-1) && cmd.exitCode() == 0) {
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return cmd.output().trimmed();
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}
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return QString();
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}
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QString lvm2_pv::getVGName(const QString& deviceNode)
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{
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return getpvField(QStringLiteral("vg_name"), deviceNode);
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}
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QList<LvmPV> lvm2_pv::getPVinNode(const PartitionNode* parent)
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{
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QList<LvmPV> partitions;
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if (parent == nullptr)
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return partitions;
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for (const auto &node : parent->children()) {
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const Partition* p = dynamic_cast<const Partition*>(node);
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if (p == nullptr)
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continue;
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if (node->children().size() > 0)
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partitions.append(getPVinNode(node));
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// FIXME: reenable newly created PVs (before applying) once everything works
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if(p->fileSystem().type() == FileSystem::Type::Lvm2_PV && p->deviceNode() == p->partitionPath())
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partitions.append(LvmPV(p->mountPoint(), p));
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if(p->fileSystem().type() == FileSystem::Type::Luks && p->deviceNode() == p->partitionPath())
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partitions.append(LvmPV(p->mountPoint(), p, true));
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}
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return partitions;
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}
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/** construct a list of Partition objects for LVM PVs that are either unused or belong to some VG.
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*
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* @param devices list of Devices which we scan for LVM PVs
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* @return list of LVM PVs
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*/
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QList<LvmPV> lvm2_pv::getPVs(const QList<Device*>& devices)
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{
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QList<LvmPV> partitions;
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for (auto const &d : devices)
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partitions.append(getPVinNode(d->partitionTable()));
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return partitions;
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}
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}
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namespace LVM {
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QList<LvmPV> pvList::m_list;
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}
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LvmPV::LvmPV(const QString vgName, const Partition* p, bool isLuks)
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: m_vgName(vgName)
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, m_p(p)
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, m_isLuks(isLuks)
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{
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}
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