341 lines
12 KiB
C++
341 lines
12 KiB
C++
/*************************************************************************
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* Copyright (C) 2012 by Volker Lanz <vl@fidra.de> *
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* Copyright (C) 2016 by Andrius Štikonas <andrius@stikonas.eu> *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 3 of *
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* the License, or (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, see <http://www.gnu.org/licenses/>.*
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*************************************************************************/
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#include "fs/lvm2_pv.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, qint64 sectorsused, const QString& label) :
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FileSystem(firstsector, lastsector, sectorsused, label, FileSystem::Lvm2_PV)
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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")) ? 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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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_GetLabel != cmdSupportNone &&
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// m_SetLabel != 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_Copy != 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("http://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::Byte, Capacity::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 val = getpvField(QStringLiteral("pv_used"), deviceNode);
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QString metadataOffset = getpvField(QStringLiteral("pe_start"), deviceNode);
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return val.isEmpty() ? -1 : val.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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// TODO: check if PV is a member of an exported VG
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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) / getPESize(deviceNode) - 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::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(mountPoint);
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QString rval = getpvField(QStringLiteral("pv_in_use"), deviceNode); // this field return "used" when in use otherwise empty string
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if (rval.isEmpty()) {
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return true;
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}
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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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QString rval = getpvField(QStringLiteral("pv_in_use"), deviceNode);
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if (rval.isEmpty()) {
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return false;
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}
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return true;
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}
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qint64 lvm2_pv::getTotalPE(const QString& deviceNode)
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{
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QString val = getpvField(QStringLiteral("pv_pe_count"), deviceNode);
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return val.isEmpty() ? -1 : val.toLongLong();
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}
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qint64 lvm2_pv::getTotalPE(const QStringList& deviceNodeList)
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{
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qint64 sum = 0;
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for (const auto &deviceNode : deviceNodeList) {
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qint64 totalPE = getTotalPE(deviceNode);
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if (totalPE < 0) {
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sum = -1;
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break;
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}
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sum += totalPE;
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}
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return sum;
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}
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qint64 lvm2_pv::getFreePE(const QString& deviceNode)
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{
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return getTotalPE(deviceNode) - getAllocatedPE(deviceNode);
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}
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qint64 lvm2_pv::getFreePE(const QStringList& deviceNodeList)
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{
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qint64 sum = 0;
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for (QString deviceNode :deviceNodeList) {
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qint64 freePE = getFreePE(deviceNode);
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if (freePE < 0) {
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sum = -1;
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break;
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}
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sum += freePE;
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}
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return sum;
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}
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qint64 lvm2_pv::getAllocatedPE(const QString& deviceNode)
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{
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QString val = getpvField(QStringLiteral("pv_pe_alloc_count"), deviceNode);
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return val.isEmpty() ? -1 : val.toLongLong();
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}
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qint64 lvm2_pv::getAllocatedPE(const QStringList& deviceNodeList)
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{
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qint64 sum = 0;
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for (QString deviceNode : deviceNodeList) {
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qint64 allocatedPE = getAllocatedPE(deviceNode);
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if (allocatedPE < 0) {
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sum = -1;
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break;
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}
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sum += allocatedPE;
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}
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return sum;
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}
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qint64 lvm2_pv::getPVSize(const QString& deviceNode)
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{
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QString val = getpvField(QStringLiteral("pv_size"), deviceNode);
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return val.isEmpty() ? -1 : val.toLongLong();
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}
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qint64 lvm2_pv::getPVSize(const QStringList& deviceNodeList)
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{
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qint64 sum = 0;
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for (QString deviceNode : deviceNodeList) {
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qint64 pvsize = getPVSize(deviceNode);
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if (pvsize < 0) {
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sum = -1;
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break;
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}
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sum += pvsize;
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}
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return sum;
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}
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qint64 lvm2_pv::getPESize(const QString& deviceNode) const
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{
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QString val = getpvField(QStringLiteral("vg_extent_size"), deviceNode);
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return val.isEmpty() ? -1 : val.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);
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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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QStringList lvm2_pv::getFreePV()
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{
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QStringList rlist;
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QString output = getpvField(QStringLiteral("pv_name"));
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const QStringList pvList = output.split(QStringLiteral("\n"), QString::SkipEmptyParts);
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for (QString pvnode : pvList) {
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if (!isUsed(pvnode.trimmed())) {
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rlist.append(pvnode.trimmed());
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}
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}
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return rlist;
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}
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bool lvm2_pv::isUsed(const QString& deviceNode)
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{
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QString output = getpvField(QStringLiteral("pv_in_use"), deviceNode.trimmed());
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if (output.trimmed() == QStringLiteral("used")) {
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return true;
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}
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return false;
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}
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}
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