552 lines
20 KiB
C++
552 lines
20 KiB
C++
/*************************************************************************
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* Copyright (C) 2008-2012 by Volker Lanz <vl@fidra.de> *
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* Copyright (C) 2016 by Andrius Štikonas <andrius@stikonas.eu> *
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* Copyright (C) 2016 by Teo Mrnjavac <teo@kde.org> *
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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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/** @file
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*/
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#include "plugins/libparted/libpartedbackend.h"
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#include "plugins/libparted/libparteddevice.h"
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#include "core/device.h"
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#include "core/partition.h"
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#include "core/partitiontable.h"
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#include "core/partitionalignment.h"
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#include "fs/filesystem.h"
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#include "fs/filesystemfactory.h"
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#include "fs/fat16.h"
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#include "fs/hfs.h"
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#include "fs/hfsplus.h"
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#include "fs/luks.h"
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#include "util/globallog.h"
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#include "util/helpers.h"
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#include <QString>
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#include <QStringList>
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#include <QDebug>
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#include <KLocalizedString>
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#include <KIOCore/KMountPoint>
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#include <KIOCore/KDiskFreeSpaceInfo>
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#include <KPluginFactory>
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#include <parted/parted.h>
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#include <unistd.h>
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#include <blkid/blkid.h>
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K_PLUGIN_FACTORY_WITH_JSON(LibPartedBackendFactory, "pmlibpartedbackendplugin.json", registerPlugin<LibPartedBackend>();)
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static struct {
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PedPartitionFlag pedFlag;
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PartitionTable::Flag flag;
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} flagmap[] = {
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{ PED_PARTITION_BOOT, PartitionTable::FlagBoot },
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{ PED_PARTITION_ROOT, PartitionTable::FlagRoot },
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{ PED_PARTITION_SWAP, PartitionTable::FlagSwap },
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{ PED_PARTITION_HIDDEN, PartitionTable::FlagHidden },
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{ PED_PARTITION_RAID, PartitionTable::FlagRaid },
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{ PED_PARTITION_LVM, PartitionTable::FlagLvm },
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{ PED_PARTITION_LBA, PartitionTable::FlagLba },
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{ PED_PARTITION_HPSERVICE, PartitionTable::FlagHpService },
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{ PED_PARTITION_PALO, PartitionTable::FlagPalo },
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{ PED_PARTITION_PREP, PartitionTable::FlagPrep },
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{ PED_PARTITION_MSFT_RESERVED, PartitionTable::FlagMsftReserved },
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{ PED_PARTITION_BIOS_GRUB, PartitionTable::FlagBiosGrub },
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{ PED_PARTITION_APPLE_TV_RECOVERY, PartitionTable::FlagAppleTvRecovery },
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{ PED_PARTITION_DIAG, PartitionTable::FlagDiag }, // generic diagnostics flag
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{ PED_PARTITION_LEGACY_BOOT, PartitionTable::FlagLegacyBoot },
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{ PED_PARTITION_MSFT_DATA, PartitionTable::FlagMsftData },
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{ PED_PARTITION_IRST, PartitionTable::FlagIrst }, // Intel Rapid Start partition
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{ PED_PARTITION_ESP, PartitionTable::FlagEsp } // EFI system
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};
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static QString s_lastPartedExceptionMessage;
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/** Callback to handle exceptions from libparted
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@param e the libparted exception to handle
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*/
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static PedExceptionOption pedExceptionHandler(PedException* e)
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{
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Log(Log::error) << i18nc("@info/plain", "LibParted Exception: %1", QString::fromLocal8Bit(e->message));
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s_lastPartedExceptionMessage = QString::fromLocal8Bit(e->message);
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return PED_EXCEPTION_UNHANDLED;
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}
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// --------------------------------------------------------------------------
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// The following structs and the typedef come from libparted's internal gpt sources.
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// It's very unfortunate there is no public API to get at the first and last usable
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// sector for GPT a partition table, so this is the only (libparted) way to get that
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// information (another way would be to read the GPT header and parse the
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// information ourselves; if the libparted devs begin changing these internal
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// structs for each point release and break our code, we'll have to do just that).
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typedef struct {
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uint32_t time_low;
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uint16_t time_mid;
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uint16_t time_hi_and_version;
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uint8_t clock_seq_hi_and_reserved;
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uint8_t clock_seq_low;
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uint8_t node[6];
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} /* __attribute__ ((packed)) */ efi_guid_t;
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struct __attribute__((packed)) _GPTDiskData {
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PedGeometry data_area;
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int entry_count;
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efi_guid_t uuid;
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};
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typedef struct _GPTDiskData GPTDiskData;
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// --------------------------------------------------------------------------
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/** Get the first sector a Partition may cover on a given Device
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@param d the Device in question
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@return the first sector usable by a Partition
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*/
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static quint64 firstUsableSector(const Device& d)
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{
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PedDevice* pedDevice = ped_device_get(d.deviceNode().toLatin1().constData());
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PedDisk* pedDisk = pedDevice ? ped_disk_new(pedDevice) : nullptr;
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quint64 rval = 0;
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if (pedDisk)
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rval = pedDisk->dev->bios_geom.sectors;
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if (pedDisk && strcmp(pedDisk->type->name, "gpt") == 0) {
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GPTDiskData* gpt_disk_data = reinterpret_cast<GPTDiskData*>(pedDisk->disk_specific);
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PedGeometry* geom = reinterpret_cast<PedGeometry*>(&gpt_disk_data->data_area);
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if (geom)
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rval = geom->start;
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else
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rval += 32;
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}
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return rval;
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}
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/** Get the last sector a Partition may cover on a given Device
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@param d the Device in question
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@return the last sector usable by a Partition
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*/
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static quint64 lastUsableSector(const Device& d)
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{
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PedDevice* pedDevice = ped_device_get(d.deviceNode().toLatin1().constData());
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PedDisk* pedDisk = pedDevice ? ped_disk_new(pedDevice) : nullptr;
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quint64 rval = 0;
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if (pedDisk)
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rval = static_cast< quint64 >( pedDisk->dev->bios_geom.sectors ) *
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pedDisk->dev->bios_geom.heads *
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pedDisk->dev->bios_geom.cylinders - 1;
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if (pedDisk && strcmp(pedDisk->type->name, "gpt") == 0) {
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GPTDiskData* gpt_disk_data = reinterpret_cast<GPTDiskData*>(pedDisk->disk_specific);
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PedGeometry* geom = reinterpret_cast<PedGeometry*>(&gpt_disk_data->data_area);
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if (geom)
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rval = geom->end;
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else
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rval -= 32;
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}
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return rval;
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}
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/** Reads sectors used on a FileSystem using libparted functions.
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@param pedDisk pointer to pedDisk where the Partition and its FileSystem are
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@param p the Partition the FileSystem is on
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@return the number of sectors used
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*/
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#if defined LIBPARTED_FS_RESIZE_LIBRARY_SUPPORT
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static qint64 readSectorsUsedLibParted(PedDisk* pedDisk, const Partition& p)
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{
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Q_ASSERT(pedDisk);
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qint64 rval = -1;
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PedPartition* pedPartition = ped_disk_get_partition_by_sector(pedDisk, p.firstSector());
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if (pedPartition) {
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PedFileSystem* pedFileSystem = ped_file_system_open(&pedPartition->geom);
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if (pedFileSystem) {
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if (PedConstraint* pedConstraint = ped_file_system_get_resize_constraint(pedFileSystem)) {
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rval = pedConstraint->min_size;
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ped_constraint_destroy(pedConstraint);
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}
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ped_file_system_close(pedFileSystem);
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}
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}
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return rval;
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}
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#endif
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/** Reads the sectors used in a FileSystem and stores the result in the Partition's FileSystem object.
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@param pedDisk pointer to pedDisk where the Partition and its FileSystem are
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@param p the Partition the FileSystem is on
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@param mountPoint mount point of the partition in question
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*/
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static void readSectorsUsed(PedDisk* pedDisk, const Device& d, Partition& p, const QString& mountPoint)
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{
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Q_ASSERT(pedDisk);
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const KDiskFreeSpaceInfo freeSpaceInfo = KDiskFreeSpaceInfo::freeSpaceInfo(mountPoint);
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if (p.isMounted() && freeSpaceInfo.isValid() && mountPoint != QStringLiteral())
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p.fileSystem().setSectorsUsed(freeSpaceInfo.used() / d.logicalSectorSize());
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else if (p.fileSystem().supportGetUsed() == FileSystem::cmdSupportFileSystem)
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p.fileSystem().setSectorsUsed(p.fileSystem().readUsedCapacity(p.deviceNode()) / d.logicalSectorSize());
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#if defined LIBPARTED_FS_RESIZE_LIBRARY_SUPPORT
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else if (p.fileSystem().supportGetUsed() == FileSystem::cmdSupportCore)
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p.fileSystem().setSectorsUsed(readSectorsUsedLibParted(pedDisk, p));
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#else
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Q_UNUSED(pedDisk);
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#endif
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}
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static PartitionTable::Flags activeFlags(PedPartition* p)
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{
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PartitionTable::Flags flags = PartitionTable::FlagNone;
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// We might get here with a pedPartition just picked up from libparted that is
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// unallocated. Libparted doesn't like it if we ask for flags for unallocated
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// space.
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if (p->num <= 0)
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return flags;
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for (quint32 i = 0; i < sizeof(flagmap) / sizeof(flagmap[0]); i++)
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if (ped_partition_is_flag_available(p, flagmap[i].pedFlag) && ped_partition_get_flag(p, flagmap[i].pedFlag))
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flags |= flagmap[i].flag;
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return flags;
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}
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static PartitionTable::Flags availableFlags(PedPartition* p)
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{
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PartitionTable::Flags flags;
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// see above.
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if (p->num <= 0)
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return flags;
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for (quint32 i = 0; i < sizeof(flagmap) / sizeof(flagmap[0]); i++)
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if (ped_partition_is_flag_available(p, flagmap[i].pedFlag)) {
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// Workaround: libparted claims the hidden flag is available for extended partitions, but
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// throws an error when we try to set or clear it. So skip this combination. Also see setFlag.
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if (p->type != PED_PARTITION_EXTENDED || flagmap[i].flag != PartitionTable::FlagHidden)
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flags |= flagmap[i].flag;
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}
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return flags;
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}
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/** Constructs a LibParted object. */
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LibPartedBackend::LibPartedBackend(QObject*, const QList<QVariant>&) :
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CoreBackend()
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{
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ped_exception_set_handler(pedExceptionHandler);
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}
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void LibPartedBackend::initFSSupport()
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{
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#if defined LIBPARTED_FS_RESIZE_LIBRARY_SUPPORT
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if (FS::fat16::m_Shrink == FileSystem::cmdSupportNone)
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FS::fat16::m_Shrink = FileSystem::cmdSupportBackend;
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if (FS::fat16::m_Grow == FileSystem::cmdSupportNone)
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FS::fat16::m_Grow = FileSystem::cmdSupportBackend;
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if (FS::hfs::m_Shrink == FileSystem::cmdSupportNone)
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FS::hfs::m_Shrink = FileSystem::cmdSupportBackend;
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if (FS::hfsplus::m_Shrink == FileSystem::cmdSupportNone)
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FS::hfsplus::m_Shrink = FileSystem::cmdSupportBackend;
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if (FS::hfs::m_GetUsed == FileSystem::cmdSupportNone)
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FS::hfs::m_GetUsed = FileSystem::cmdSupportBackend;
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if (FS::hfsplus::m_GetUsed == FileSystem::cmdSupportNone)
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FS::hfsplus::m_GetUsed = FileSystem::cmdSupportBackend;
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#endif
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}
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/** Scans a Device for Partitions.
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This method will scan a Device for all Partitions on it, detect the FileSystem for each Partition,
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try to determine the FileSystem usage, read the FileSystem label and store it all in newly created
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objects that are in the end added to the Device's PartitionTable.
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@param pedDevice libparted pointer to the device
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@param d Device
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@param pedDisk libparted pointer to the partition table
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*/
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void LibPartedBackend::scanDevicePartitions(PedDevice*, Device& d, PedDisk* pedDisk)
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{
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Q_ASSERT(pedDisk);
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Q_ASSERT(d.partitionTable());
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PedPartition* pedPartition = nullptr;
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KMountPoint::List mountPoints = KMountPoint::currentMountPoints(KMountPoint::NeedRealDeviceName);
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mountPoints.append(KMountPoint::possibleMountPoints(KMountPoint::NeedRealDeviceName));
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QList<Partition*> partitions;
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while ((pedPartition = ped_disk_next_partition(pedDisk, pedPartition))) {
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if (pedPartition->num < 1)
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continue;
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PartitionRole::Roles r = PartitionRole::None;
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FileSystem::Type type = detectFileSystem(pedPartition);
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switch (pedPartition->type) {
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case PED_PARTITION_NORMAL:
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r = PartitionRole::Primary;
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break;
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case PED_PARTITION_EXTENDED:
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r = PartitionRole::Extended;
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type = FileSystem::Extended;
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break;
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case PED_PARTITION_LOGICAL:
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r = PartitionRole::Logical;
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break;
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default:
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continue;
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}
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// Find an extended partition this partition is in.
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PartitionNode* parent = d.partitionTable()->findPartitionBySector(pedPartition->geom.start, PartitionRole(PartitionRole::Extended));
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// None found, so it's a primary in the device's partition table.
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if (parent == nullptr)
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parent = d.partitionTable();
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const QString node = QString::fromUtf8(ped_partition_get_path(pedPartition));
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FileSystem* fs = FileSystemFactory::create(type, pedPartition->geom.start, pedPartition->geom.end);
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// libparted does not handle LUKS partitions
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QString mountPoint;
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bool mounted;
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if (fs->type() == FileSystem::Luks) {
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mountPoint = FS::luks::mapperName(node);
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mounted = (mountPoint != QString()) ? true : false;
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} else {
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mountPoint = mountPoints.findByDevice(node) ? mountPoints.findByDevice(node)->mountPoint() : QString();
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mounted = ped_partition_is_busy(pedPartition);
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}
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Partition* part = new Partition(parent, d, PartitionRole(r), fs, pedPartition->geom.start, pedPartition->geom.end, node, availableFlags(pedPartition), mountPoint, mounted, activeFlags(pedPartition));
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readSectorsUsed(pedDisk, d, *part, mountPoint);
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if (fs->supportGetLabel() != FileSystem::cmdSupportNone)
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fs->setLabel(fs->readLabel(part->deviceNode()));
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if (fs->supportGetUUID() != FileSystem::cmdSupportNone)
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fs->setUUID(fs->readUUID(part->deviceNode()));
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parent->append(part);
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partitions.append(part);
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}
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d.partitionTable()->updateUnallocated(d);
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if (d.partitionTable()->isSectorBased(d))
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d.partitionTable()->setType(d, PartitionTable::msdos_sectorbased);
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foreach(const Partition * part, partitions)
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PartitionAlignment::isAligned(d, *part);
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ped_disk_destroy(pedDisk);
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}
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/** Create a Device for the given device_node and scan it for partitions.
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@param device_node the device node (e.g. "/dev/sda")
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@return the created Device object. callers need to free this.
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*/
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Device* LibPartedBackend::scanDevice(const QString& device_node)
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{
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PedDevice* pedDevice = ped_device_get(device_node.toLocal8Bit().constData());
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if (pedDevice == nullptr) {
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Log(Log::warning) << xi18nc("@info/plain", "Could not access device <filename>%1</filename>", device_node);
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return nullptr;
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}
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Log(Log::information) << i18nc("@info/plain", "Device found: %1", QString::fromUtf8(pedDevice->model));
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Device* d = new Device(QString::fromUtf8(pedDevice->model), QString::fromUtf8(pedDevice->path), pedDevice->bios_geom.heads, pedDevice->bios_geom.sectors, pedDevice->bios_geom.cylinders, pedDevice->sector_size);
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PedDisk* pedDisk = ped_disk_new(pedDevice);
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if (pedDisk) {
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const PartitionTable::TableType type = PartitionTable::nameToTableType(QString::fromUtf8(pedDisk->type->name));
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CoreBackend::setPartitionTableForDevice(*d, new PartitionTable(type, firstUsableSector(*d), lastUsableSector(*d)));
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CoreBackend::setPartitionTableMaxPrimaries(*d->partitionTable(), ped_disk_get_max_primary_partition_count(pedDisk));
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scanDevicePartitions(pedDevice, *d, pedDisk);
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}
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return d;
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}
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QList<Device*> LibPartedBackend::scanDevices(bool excludeReadOnly)
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{
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QList<Device*> result;
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ped_device_probe_all();
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PedDevice* pedDevice = nullptr;
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QVector<QString> path;
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quint32 totalDevices = 0;
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while (true) {
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pedDevice = ped_device_get_next(pedDevice);
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if (!pedDevice)
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break;
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if (pedDevice->type == PED_DEVICE_DM)
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continue;
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if (excludeReadOnly && (
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pedDevice->type == PED_DEVICE_LOOP ||
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pedDevice->read_only))
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continue;
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path.push_back(QString::fromUtf8(pedDevice->path));
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++totalDevices;
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}
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for (quint32 i = 0; i < totalDevices; ++i) {
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emitScanProgress(path[i], i * 100 / totalDevices);
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Device* d = scanDevice(path[i]);
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if (d)
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result.append(d);
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}
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return result;
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}
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CoreBackendDevice* LibPartedBackend::openDevice(const QString& device_node)
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{
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LibPartedDevice* device = new LibPartedDevice(device_node);
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if (device == nullptr || !device->open()) {
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delete device;
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device = nullptr;
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}
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return device;
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}
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CoreBackendDevice* LibPartedBackend::openDeviceExclusive(const QString& device_node)
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{
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LibPartedDevice* device = new LibPartedDevice(device_node);
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if (device == nullptr || !device->openExclusive()) {
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delete device;
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device = nullptr;
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}
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return device;
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}
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bool LibPartedBackend::closeDevice(CoreBackendDevice* core_device)
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{
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return core_device->close();
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}
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/** Detects the type of a FileSystem given a PedDevice and a PedPartition
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@param pedDevice pointer to the pedDevice. Must not be nullptr.
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@param pedPartition pointer to the pedPartition. Must not be nullptr
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@return the detected FileSystem type (FileSystem::Unknown if not detected)
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*/
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FileSystem::Type LibPartedBackend::detectFileSystem(PedPartition* pedPartition)
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{
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FileSystem::Type rval = FileSystem::Unknown;
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blkid_cache cache;
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char* pedPath = nullptr;
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if (blkid_get_cache(&cache, nullptr) == 0 && (pedPath = ped_partition_get_path(pedPartition))) {
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blkid_dev dev;
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if ((dev = blkid_get_dev(cache, pedPath, BLKID_DEV_NORMAL)) != nullptr) {
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QString s = QString::fromUtf8(blkid_get_tag_value(cache, "TYPE", pedPath));
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if (s == QStringLiteral("ext2")) rval = FileSystem::Ext2;
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else if (s == QStringLiteral("ext3")) rval = FileSystem::Ext3;
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else if (s.startsWith(QStringLiteral("ext4"))) rval = FileSystem::Ext4;
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else if (s == QStringLiteral("swap")) rval = FileSystem::LinuxSwap;
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else if (s == QStringLiteral("ntfs")) rval = FileSystem::Ntfs;
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else if (s == QStringLiteral("reiserfs")) rval = FileSystem::ReiserFS;
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else if (s == QStringLiteral("reiser4")) rval = FileSystem::Reiser4;
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else if (s == QStringLiteral("xfs")) rval = FileSystem::Xfs;
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else if (s == QStringLiteral("jfs")) rval = FileSystem::Jfs;
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else if (s == QStringLiteral("hfs")) rval = FileSystem::Hfs;
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else if (s == QStringLiteral("hfsplus")) rval = FileSystem::HfsPlus;
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else if (s == QStringLiteral("ufs")) rval = FileSystem::Ufs;
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else if (s == QStringLiteral("vfat")) {
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// libblkid uses SEC_TYPE to distinguish between FAT16 and FAT32
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QString st = QString::fromUtf8(blkid_get_tag_value(cache, "SEC_TYPE", pedPath));
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if (st == QStringLiteral("msdos"))
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rval = FileSystem::Fat16;
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else
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rval = FileSystem::Fat32;
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} else if (s == QStringLiteral("btrfs")) rval = FileSystem::Btrfs;
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else if (s == QStringLiteral("ocfs2")) rval = FileSystem::Ocfs2;
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else if (s == QStringLiteral("zfs_member")) rval = FileSystem::Zfs;
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else if (s == QStringLiteral("hpfs")) rval = FileSystem::Hpfs;
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else if (s == QStringLiteral("crypto_LUKS")) rval = FileSystem::Luks;
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else if (s == QStringLiteral("exfat")) rval = FileSystem::Exfat;
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else if (s == QStringLiteral("nilfs2")) rval = FileSystem::Nilfs2;
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else if (s == QStringLiteral("LVM2_member")) rval = FileSystem::Lvm2_PV;
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else if (s == QStringLiteral("f2fs")) rval = FileSystem::F2fs;
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else
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qWarning() << "blkid: unknown file system type " << s << " on " << pedPath;
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|
}
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blkid_put_cache(cache);
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|
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|
free(pedPath);
|
|
}
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return rval;
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}
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PedPartitionFlag LibPartedBackend::getPedFlag(PartitionTable::Flag flag)
|
|
{
|
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for (quint32 i = 0; i < sizeof(flagmap) / sizeof(flagmap[0]); i++)
|
|
if (flagmap[i].flag == flag)
|
|
return flagmap[i].pedFlag;
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|
|
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return static_cast<PedPartitionFlag>(-1);
|
|
}
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|
|
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QString LibPartedBackend::lastPartedExceptionMessage()
|
|
{
|
|
return s_lastPartedExceptionMessage;
|
|
}
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#include "libpartedbackend.moc"
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