File indexing completed on 2024-05-05 05:48:43

 /*
     SPDX-FileCopyrightText: 2008-2010 Volker Lanz <vl@fidra.de>
     SPDX-FileCopyrightText: 2012-2018 Andrius Štikonas <andrius@stikonas.eu>
     SPDX-FileCopyrightText: 2020 Arnaud Ferraris <arnaud.ferraris@collabora.com>
     SPDX-FileCopyrightText: 2020 Gaël PORTAY <gael.portay@collabora.com>
 
     SPDX-License-Identifier: GPL-3.0-or-later
 */
 
 #include "fs/ext2.h"
 
 #include "util/externalcommand.h"
 #include "util/capacity.h"
 
 #include <QRegularExpression>
 #include <QString>
 
 namespace FS
 {
 FileSystem::CommandSupportType ext2::m_GetUsed = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_GetLabel = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_Create = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_Grow = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_Shrink = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_Move = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_Check = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_Copy = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_Backup = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_SetLabel = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_UpdateUUID = FileSystem::cmdSupportNone;
 FileSystem::CommandSupportType ext2::m_GetUUID = FileSystem::cmdSupportNone;
 
 ext2::ext2(qint64 firstsector, qint64 lastsector, qint64 sectorsused, const QString& label, const QVariantMap& features, FileSystem::Type t) :
     FileSystem(firstsector, lastsector, sectorsused, label, features, t)
 {
 }
 
 void ext2::init()
 {
     m_GetUsed = findExternal(QStringLiteral("dumpe2fs")) ? cmdSupportFileSystem : cmdSupportNone;
     m_GetLabel = cmdSupportCore;
     m_SetLabel = findExternal(QStringLiteral("e2label")) ? cmdSupportFileSystem : cmdSupportNone;
     m_Create = findExternal(QStringLiteral("mkfs.ext2")) ? cmdSupportFileSystem : cmdSupportNone;
     m_Check = findExternal(QStringLiteral("e2fsck"), { QStringLiteral("-V") }) ? cmdSupportFileSystem : cmdSupportNone;
     m_UpdateUUID = findExternal(QStringLiteral("tune2fs")) ? cmdSupportFileSystem : cmdSupportNone;
     m_Grow = (m_Check != cmdSupportNone && findExternal(QStringLiteral("resize2fs"))) ? cmdSupportFileSystem : cmdSupportNone;
     m_Shrink = (m_Grow != cmdSupportNone && m_GetUsed) != cmdSupportNone ? cmdSupportFileSystem : cmdSupportNone;
     m_Copy = (m_Check != cmdSupportNone) ? cmdSupportCore : cmdSupportNone;
     m_Move = (m_Check != cmdSupportNone) ? cmdSupportCore : cmdSupportNone;
     m_Backup = cmdSupportCore;
     m_GetUUID = cmdSupportCore;
 
     if (m_Create == cmdSupportFileSystem) {
         addAvailableFeature(QStringLiteral("64bit"));
         addAvailableFeature(QStringLiteral("bigalloc"));
         addAvailableFeature(QStringLiteral("casefold"));
         addAvailableFeature(QStringLiteral("dir_index"));
         addAvailableFeature(QStringLiteral("dir_nlink"));
         addAvailableFeature(QStringLiteral("ea_inode"));
         addAvailableFeature(QStringLiteral("encrypt"));
         addAvailableFeature(QStringLiteral("ext_attr"));
         addAvailableFeature(QStringLiteral("extent"));
         addAvailableFeature(QStringLiteral("extra_isize"));
         addAvailableFeature(QStringLiteral("filetype"));
         addAvailableFeature(QStringLiteral("flex_bg"));
         addAvailableFeature(QStringLiteral("has_journal"));
         addAvailableFeature(QStringLiteral("huge_file"));
         addAvailableFeature(QStringLiteral("inline_data"));
         addAvailableFeature(QStringLiteral("journal_dev"));
         addAvailableFeature(QStringLiteral("large_dir"));
         addAvailableFeature(QStringLiteral("large_file"));
         addAvailableFeature(QStringLiteral("metadata_csum"));
         addAvailableFeature(QStringLiteral("metadata_csum_seed"));
         addAvailableFeature(QStringLiteral("meta_bg"));
         addAvailableFeature(QStringLiteral("mmp"));
         addAvailableFeature(QStringLiteral("project"));
         addAvailableFeature(QStringLiteral("quota"));
         addAvailableFeature(QStringLiteral("resize_inode"));
         addAvailableFeature(QStringLiteral("sparse_super"));
         addAvailableFeature(QStringLiteral("sparse_super2"));
         addAvailableFeature(QStringLiteral("uninit_bg"));
     }
 }
 
 bool ext2::supportToolFound() const
 {
     return
         m_GetUsed != cmdSupportNone &&
         m_GetLabel != cmdSupportNone &&
         m_SetLabel != cmdSupportNone &&
         m_Create != cmdSupportNone &&
         m_Check != cmdSupportNone &&
         m_UpdateUUID != cmdSupportNone &&
         m_Grow != cmdSupportNone &&
         m_Shrink != cmdSupportNone &&
         m_Copy != cmdSupportNone &&
         m_Move != cmdSupportNone &&
         m_Backup != cmdSupportNone &&
         m_GetUUID != cmdSupportNone;
 }
 
 FileSystem::SupportTool ext2::supportToolName() const
 {
     return SupportTool(QStringLiteral("e2fsprogs"), QUrl(QStringLiteral("http://e2fsprogs.sf.net")));
 }
 
 qint64 ext2::maxCapacity() const
 {
     return 16 * Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::TiB) - Capacity::unitFactor(Capacity::Unit::Byte, Capacity::Unit::MiB);
 }
 
 int ext2::maxLabelLength() const
 {
     return 16;
 }
 
 qint64 ext2::readUsedCapacity(const QString& deviceNode) const
 {
     ExternalCommand cmd(QStringLiteral("dumpe2fs"), { QStringLiteral("-h"), deviceNode });
 
     if (cmd.run()) {
         qint64 blockCount = -1;
         QRegularExpression re(QStringLiteral("Block count:\\s+(\\d+)"));
         QRegularExpressionMatch reBlockCount = re.match(cmd.output());
 
         if (reBlockCount.hasMatch())
             blockCount = reBlockCount.captured(1).toLongLong();
 
         qint64 freeBlocks = -1;
         re.setPattern(QStringLiteral("Free blocks:\\s+(\\d+)"));
         QRegularExpressionMatch reFreeBlocks = re.match(cmd.output());
 
         if (reFreeBlocks.hasMatch())
             freeBlocks = reFreeBlocks.captured(1).toLongLong();
 
         qint64 blockSize = -1;
         re.setPattern(QStringLiteral("Block size:\\s+(\\d+)"));
         QRegularExpressionMatch reBlockSize = re.match(cmd.output());
 
         if (reBlockSize.hasMatch())
             blockSize = reBlockSize.captured(1).toLongLong();
 
         if (blockCount > -1 && freeBlocks > -1 && blockSize > -1)
             return (blockCount - freeBlocks) * blockSize;
     }
 
     return -1;
 }
 
 bool ext2::check(Report& report, const QString& deviceNode) const
 {
     ExternalCommand cmd(report, QStringLiteral("e2fsck"), { QStringLiteral("-f"), QStringLiteral("-y"), QStringLiteral("-v"), deviceNode });
     return cmd.run(-1) && (cmd.exitCode() == 0 || cmd.exitCode() == 1 || cmd.exitCode() == 2 || cmd.exitCode() == 256);
 }
 
 bool ext2::create(Report& report, const QString& deviceNode)
 {
     QStringList args = QStringList();
 
     if (!this->features().isEmpty()) {
         QStringList feature_list = QStringList();
         for (const auto& k : this->features().keys()) {
         const auto& v = this->features().value(k);
             if (v.type() == QVariant::Type::Bool) {
                 if (v.toBool())
                     feature_list << k;
         else
                     feature_list << (QStringLiteral("^") +  k);
             } else {
                 qWarning() << "Ignoring feature" << k << "of type" << v.type() << "; requires type QVariant::bool.";
             }
         }
         args << QStringLiteral("-O") << feature_list.join(QStringLiteral(","));
     }
     args << QStringLiteral("-qF") << deviceNode;
 
     ExternalCommand cmd(report, QStringLiteral("mkfs.ext2"), args);
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool ext2::resize(Report& report, const QString& deviceNode, qint64 length) const
 {
     const QString len = QString::number(length / 512) + QStringLiteral("s");
 
     ExternalCommand cmd(report, QStringLiteral("resize2fs"), { deviceNode, len });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool ext2::writeLabel(Report& report, const QString& deviceNode, const QString& newLabel)
 {
     ExternalCommand cmd(report, QStringLiteral("e2label"), { deviceNode, newLabel });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 
 bool ext2::writeLabelOnline(Report& report, const QString& deviceNode, const QString& mountPoint, const QString& newLabel)
 {
     Q_UNUSED(mountPoint)
     return writeLabel(report, deviceNode, newLabel);
 }
 
 bool ext2::updateUUID(Report& report, const QString& deviceNode) const
 {
     ExternalCommand cmd(report, QStringLiteral("tune2fs"), { QStringLiteral("-U"), QStringLiteral("random"), deviceNode });
     return cmd.run(-1) && cmd.exitCode() == 0;
 }
 }