partitions.hpp - android_bootable_recovery - Gitiles

 /*
 	Copyright 2014 TeamWin
 	This file is part of TWRP/TeamWin Recovery Project.

 	TWRP is free software: you can redistribute it and/or modify
 	it under the terms of the GNU General Public License as published by
 	the Free Software Foundation, either version 3 of the License, or
 	(at your option) any later version.

 	TWRP is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 	GNU General Public License for more details.

 	You should have received a copy of the GNU General Public License
 	along with TWRP.  If not, see <http://www.gnu.org/licenses/>.
 */

 #ifndef __TWRP_Partition_Manager
 #define __TWRP_Partition_Manager

 #include <vector>
 #include <string>
 #include "twrpDU.hpp"
 #include "tw_atomic.hpp"

 #define MAX_FSTAB_LINE_LENGTH 2048

 using namespace std;

 struct PartitionList {
 	std::string Display_Name;
 	std::string Mount_Point;
 	unsigned int selected;
 };

 // Partition class
 class TWPartition
 {
 public:
 	enum Backup_Method_enum {
 		NONE = 0,
 		FILES = 1,
 		DD = 2,
 		FLASH_UTILS = 3,
 	};

 public:
 	TWPartition();
 	virtual ~TWPartition();

 public:
 	bool Is_Mounted();                                                        // Checks mount to see if the partition is currently mounted
 	bool Mount(bool Display_Error);                                           // Mounts the partition if it is not mounted
 	bool UnMount(bool Display_Error);                                         // Unmounts the partition if it is mounted
 	bool Wipe(string New_File_System);                                        // Wipes the partition
 	bool Wipe();                                                              // Wipes the partition
 	bool Wipe_AndSec();                                                       // Wipes android secure
 	bool Can_Repair();                                                        // Checks to see if we have everything needed to be able to repair the current file system
 	uint64_t Get_Max_FileSize();					  	  //get partition maxFileSie
 	bool Repair();                                                            // Repairs the current file system
 	bool Backup(string backup_folder, const unsigned long long *overall_size, const unsigned long long *other_backups_size, pid_t &tar_fork_pid); // Backs up the partition to the folder specified
 	bool Check_MD5(string restore_folder);                                    // Checks MD5 of a backup
 	bool Restore(string restore_folder, const unsigned long long *total_restore_size, unsigned long long *already_restored_size); // Restores the partition using the backup folder provided
 	unsigned long long Get_Restore_Size(string restore_folder);               // Returns the overall restore size of the backup
 	string Backup_Method_By_Name();                                           // Returns a string of the backup method for human readable output
 	bool Decrypt(string Password);                                            // Decrypts the partition, return 0 for failure and -1 for success
 	bool Wipe_Encryption();                                                   // Ignores wipe commands for /data/media devices and formats the original block device
 	void Check_FS_Type();                                                     // Checks the fs type using blkid, does not do anything on MTD / yaffs2 because this crashes on some devices
 	bool Update_Size(bool Display_Error);                                     // Updates size information
 	void Recreate_Media_Folder();                                             // Recreates the /data/media folder
 	bool Flash_Image(string Filename);                                        // Flashes an image to the partition

 public:
 	string Current_File_System;                                               // Current file system
 	string Actual_Block_Device;                                               // Actual block device (one of primary, alternate, or decrypted)
 	string MTD_Name;                                                          // Name of the partition for MTD devices
 	bool Is_Present;                                                          // Indicates if the partition is currently present as a block device
 	string Crypto_Key_Location;                                               // Location of the crypto key used for decrypting encrypted data partitions
 	unsigned int MTP_Storage_ID;

 protected:
 	bool Has_Data_Media;                                                      // Indicates presence of /data/media, may affect wiping and backup methods
 	void Setup_Data_Media();                                                  // Sets up a partition as a /data/media emulated storage partition

 private:
 	bool Process_Fstab_Line(string Line, bool Display_Error);                 // Processes a fstab line
 	void Find_Actual_Block_Device();                                          // Determines the correct block device and stores it in Actual_Block_Device

 	bool Process_Flags(string Flags, bool Display_Error);                     // Process custom fstab flags
 	bool Process_FS_Flags(string& Options, int Flags);                        // Process standard fstab fs flags
 	bool Is_File_System(string File_System);                                  // Checks to see if the file system given is considered a file system
 	bool Is_Image(string File_System);                                        // Checks to see if the file system given is considered an image
 	void Setup_File_System(bool Display_Error);                               // Sets defaults for a file system partition
 	void Setup_Image(bool Display_Error);                                     // Sets defaults for an image partition
 	void Setup_AndSec(void);                                                  // Sets up .android_secure settings
 	void Find_Real_Block_Device(string& Block_Device, bool Display_Error);    // Checks the block device given and follows symlinks until it gets to the real block device
 	bool Find_Partition_Size();                                               // Finds the partition size from /proc/partitions
 	unsigned long long Get_Size_Via_du(string Path, bool Display_Error);      // Uses du to get sizes
 	bool Wipe_EXT23(string File_System);                                      // Formats as ext3 or ext2
 	bool Wipe_EXT4();                                                         // Formats using ext4, uses make_ext4fs when present
 	bool Wipe_FAT();                                                          // Formats as FAT if mkdosfs exits otherwise rm -rf wipe
 	bool Wipe_EXFAT();                                                        // Formats as EXFAT
 	bool Wipe_MTD();                                                          // Formats as yaffs2 for MTD memory types
 	bool Wipe_RMRF();                                                         // Uses rm -rf to wipe
 	bool Wipe_F2FS();                                                         // Uses mkfs.f2fs to wipe
 	bool Wipe_Data_Without_Wiping_Media();                                    // Uses rm -rf to wipe but does not wipe /data/media
 	bool Backup_Tar(string backup_folder, const unsigned long long *overall_size, const unsigned long long *other_backups_size, pid_t &tar_fork_pid); // Backs up using tar for file systems
 	bool Backup_DD(string backup_folder);                                     // Backs up using dd for emmc memory types
 	bool Backup_Dump_Image(string backup_folder);                             // Backs up using dump_image for MTD memory types
 	string Get_Restore_File_System(string restore_folder);                    // Returns the file system that was in place at the time of the backup
 	bool Restore_Tar(string restore_folder, string Restore_File_System, const unsigned long long *total_restore_size, unsigned long long *already_restored_size); // Restore using tar for file systems
 	bool Restore_Image(string restore_folder, const unsigned long long *total_restore_size, unsigned long long *already_restored_size, string Restore_File_System); // Restore using dd for images
 	bool Get_Size_Via_statfs(bool Display_Error);                             // Get Partition size, used, and free space using statfs
 	bool Get_Size_Via_df(bool Display_Error);                                 // Get Partition size, used, and free space using df command
 	bool Make_Dir(string Path, bool Display_Error);                           // Creates a directory if it doesn't already exist
 	bool Find_MTD_Block_Device(string MTD_Name);                              // Finds the mtd block device based on the name from the fstab
 	void Recreate_AndSec_Folder(void);                                        // Recreates the .android_secure folder
 	void Mount_Storage_Retry(void);                                           // Tries multiple times with a half second delay to mount a device in case storage is slow to mount
 	bool Flash_Image_DD(string Filename);                                     // Flashes an image to the partition using dd
 	bool Flash_Image_FI(string Filename);                                     // Flashes an image to the partition using flash_image for mtd nand

 private:
 	bool Can_Be_Mounted;                                                      // Indicates that the partition can be mounted
 	bool Can_Be_Wiped;                                                        // Indicates that the partition can be wiped
 	bool Can_Be_Backed_Up;                                                    // Indicates that the partition will show up in the backup list
 	bool Use_Rm_Rf;                                                           // Indicates that the partition will always be formatted w/ "rm -rf *"
 	bool Wipe_During_Factory_Reset;                                           // Indicates that this partition is wiped during a factory reset
 	bool Wipe_Available_in_GUI;                                               // Inidcates that the wipe can be user initiated in the GUI system
 	bool Is_SubPartition;                                                     // Indicates that this partition is a sub-partition of another partition (e.g. datadata is a sub-partition of data)
 	bool Has_SubPartition;                                                    // Indicates that this partition has a sub-partition
 	string SubPartition_Of;                                                   // Indicates which partition is the parent partition of this partition (e.g. /data is the parent partition of /datadata)
 	string Symlink_Path;                                                      // Symlink path (e.g. /data/media)
 	string Symlink_Mount_Point;                                               // /sdcard could be the symlink mount point for /data/media
 	string Mount_Point;                                                       // Mount point for this partition (e.g. /system or /data)
 	string Backup_Path;                                                       // Path for backup
 	string Primary_Block_Device;                                              // Block device (e.g. /dev/block/mmcblk1p1)
 	string Alternate_Block_Device;                                            // Alternate block device (e.g. /dev/block/mmcblk1)
 	string Decrypted_Block_Device;                                            // Decrypted block device available after decryption
 	bool Removable;                                                           // Indicates if this partition is removable -- affects how often we check overall size, if present, etc.
 	int Length;                                                               // Used by make_ext4fs to leave free space at the end of the partition block for things like a crypto footer
 	unsigned long long Size;                                                  // Overall size of the partition
 	unsigned long long Used;                                                  // Overall used space
 	unsigned long long Free;                                                  // Overall free space
 	unsigned long long Backup_Size;                                           // Backup size -- may be different than used space especially when /data/media is present
 	unsigned long long Restore_Size;                                          // Restore size of the current restore operation
 	bool Can_Be_Encrypted;                                                    // This partition might be encrypted, affects error handling, can only be true if crypto support is compiled in
 	bool Is_Encrypted;                                                        // This partition is thought to be encrypted -- it wouldn't mount for some reason, only avialble with crypto support
 	bool Is_Decrypted;                                                        // This partition has successfully been decrypted
 	bool Mount_To_Decrypt;                                                    // Mount this partition during decrypt (/vendor, /firmware, etc in case we need proprietary libs or firmware files)
 	string Display_Name;                                                      // Display name for the GUI
 	string Backup_Name;                                                       // Backup name -- used for backup filenames
 	string Backup_Display_Name;                                               // Name displayed in the partition list for backup selection
 	string Storage_Name;                                                      // Name displayed in the partition list for storage selection
 	string Backup_FileName;                                                   // Actual backup filename
 	Backup_Method_enum Backup_Method;                                         // Method used for backup
 	bool Can_Encrypt_Backup;                                                  // Indicates if this item can be encrypted during backup
 	bool Use_Userdata_Encryption;                                             // Indicates if we will use userdata encryption splitting on an encrypted backup
 	bool Has_Android_Secure;                                                  // Indicates the presence of .android_secure on this partition
 	bool Is_Storage;                                                          // Indicates if this partition is used for storage for backup, restore, and installing zips
 	bool Is_Settings_Storage;                                                 // Indicates that this storage partition is the location of the .twrps settings file and the location that is used for custom themes
 	string Storage_Path;                                                      // Indicates the path to the storage -- root indicates mount point, media/ indicates e.g. /data/media
 	string Fstab_File_System;                                                 // File system from the recovery.fstab
 	int Mount_Flags;                                                          // File system flags from recovery.fstab
 	string Mount_Options;                                                     // File system options from recovery.fstab
 	int Format_Block_Size;                                                    // Block size for formatting
 	bool Ignore_Blkid;                                                        // Ignore blkid results due to superblocks lying to us on certain devices / partitions
 	bool Retain_Layout_Version;                                               // Retains the .layout_version file during a wipe (needed on devices like Sony Xperia T where /data and /data/media are separate partitions)
 	bool Can_Flash_Img;                                                       // Indicates if this partition can have images flashed to it via the GUI

 friend class TWPartitionManager;
 friend class DataManager;
 friend class GUIPartitionList;
 friend class GUIAction;
 };

 class TWPartitionManager
 {
 public:
 	TWPartitionManager();													  // Constructor for TWRPartionManager
 	~TWPartitionManager() {}

 public:
 	int Process_Fstab(string Fstab_Filename, bool Display_Error);             // Parses the fstab and populates the partitions
 	int Write_Fstab();                                                        // Creates /etc/fstab file that's used by the command line for mount commands
 	void Output_Partition_Logging();                                          // Outputs partition information to the log
 	int Mount_By_Path(string Path, bool Display_Error);                       // Mounts partition based on path (e.g. /system)
 	int UnMount_By_Path(string Path, bool Display_Error);                     // Unmounts partition based on path
 	int Is_Mounted_By_Path(string Path);                                      // Checks if partition is mounted based on path
 	int Mount_Current_Storage(bool Display_Error);                            // Mounts the current storage location
 	int Mount_Settings_Storage(bool Display_Error);                           // Mounts the settings file storage location (usually internal)
 	TWPartition* Find_Partition_By_Path(string Path);                         // Returns a pointer to a partition based on path
 	int Check_Backup_Name(bool Display_Error);                                // Checks the current backup name to ensure that it is valid
 	int Run_Backup();                                                         // Initiates a backup in the current storage
 	int Run_Restore(string Restore_Name);                                     // Restores a backup
 	void Set_Restore_Files(string Restore_Name);                              // Used to gather a list of available backup partitions for the user to select for a restore
 	int Wipe_By_Path(string Path);                                            // Wipes a partition based on path
 	int Wipe_By_Path(string Path, string New_File_System);                    // Wipes a partition based on path
 	int Factory_Reset();                                                      // Performs a factory reset
 	int Wipe_Dalvik_Cache();                                                  // Wipes dalvik cache
 	int Wipe_Rotate_Data();                                                   // Wipes rotation data --
 	int Wipe_Battery_Stats();                                                 // Wipe battery stats -- /data/system/batterystats.bin
 	int Wipe_Android_Secure();                                                // Wipes android secure
 	int Format_Data();                                                        // Really formats data on /data/media devices -- also removes encryption
 	int Wipe_Media_From_Data();                                               // Removes and recreates the media folder on /data/media devices
 	int Repair_By_Path(string Path, bool Display_Error);                      // Repairs a partition based on path
 	void Update_System_Details();                                             // Updates fstab, file systems, sizes, etc.
 	int Decrypt_Device(string Password);                                      // Attempt to decrypt any encrypted partitions
 	int usb_storage_enable(void);                                             // Enable USB storage mode
 	int usb_storage_disable(void);                                            // Disable USB storage mode
 	void Mount_All_Storage(void);                                             // Mounts all storage locations
 	void UnMount_Main_Partitions(void);                                       // Unmounts system and data if not data/media and boot if boot is mountable
 	int Partition_SDCard(void);                                               // Repartitions the sdcard
 	TWPartition *Get_Default_Storage_Partition();                             // Returns a pointer to a default storage partition
 	int Cancel_Backup();                                                      // Signals partition backup to cancel
 	void Clean_Backup_Folder(string Backup_Folder);				  // Clean Backup Folder on Error
 	int Fix_Permissions();
 	void Get_Partition_List(string ListType, std::vector<PartitionList> *Partition_List);
 	int Fstab_Processed();                                                    // Indicates if the fstab has been processed or not
 	void Output_Storage_Fstab();                                              // Creates a /cache/recovery/storage.fstab file with a list of all potential storage locations for app use
 	bool Enable_MTP();                                                        // Enables MTP
 	void Add_All_MTP_Storage();                                               // Adds all storage objects for MTP
 	bool Disable_MTP();                                                       // Disables MTP
 	bool Add_MTP_Storage(string Mount_Point);                                 // Adds or removes an MTP Storage partition
 	bool Add_MTP_Storage(unsigned int Storage_ID);                            // Adds or removes an MTP Storage partition
 	bool Remove_MTP_Storage(string Mount_Point);                              // Adds or removes an MTP Storage partition
 	bool Remove_MTP_Storage(unsigned int Storage_ID);                         // Adds or removes an MTP Storage partition
 	bool Flash_Image(string Filename);                                        // Flashes an image to a selected partition from the partition list

 	TWAtomicInt stop_backup;

 private:
 	void Setup_Settings_Storage_Partition(TWPartition* Part);                 // Sets up settings storage
 	void Setup_Android_Secure_Location(TWPartition* Part);                    // Sets up .android_secure if needed
 	bool Make_MD5(bool generate_md5, string Backup_Folder, string Backup_Filename); // Generates an MD5 after a backup is made
 	bool Backup_Partition(TWPartition* Part, string Backup_Folder, bool generate_md5, unsigned long long* img_bytes_remaining, unsigned long long* file_bytes_remaining, unsigned long *img_time, unsigned long *file_time, unsigned long long *img_bytes, unsigned long long *file_bytes);
 	bool Restore_Partition(TWPartition* Part, string Restore_Name, int partition_count, const unsigned long long *total_restore_size, unsigned long long *already_restored_size);
 	void Output_Partition(TWPartition* Part);
 	TWPartition* Find_Partition_By_MTP_Storage_ID(unsigned int Storage_ID);   // Returns a pointer to a partition based on MTP Storage ID
 	bool Add_Remove_MTP_Storage(TWPartition* Part, int message_type);   // Adds or removes an MTP Storage partition
 	TWPartition* Find_Next_Storage(string Path, string Exclude);
 	int Open_Lun_File(string Partition_Path, string Lun_File);
 	pid_t mtppid;
 	bool mtp_was_enabled;
 	int mtp_write_fd;
 	pid_t tar_fork_pid;

 private:
 	std::vector<TWPartition*> Partitions;                                     // Vector list of all partitions
 };

 extern TWPartitionManager PartitionManager;

 #endif // __TWRP_Partition_Manager
	/*
	Copyright 2014 TeamWin
	This file is part of TWRP/TeamWin Recovery Project.

	TWRP is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	TWRP is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with TWRP. If not, see <http://www.gnu.org/licenses/>.
	*/

	#ifndef __TWRP_Partition_Manager
	#define __TWRP_Partition_Manager

	#include <vector>
	#include <string>
	#include "twrpDU.hpp"
	#include "tw_atomic.hpp"

	#define MAX_FSTAB_LINE_LENGTH 2048

	using namespace std;

	struct PartitionList {
	std::string Display_Name;
	std::string Mount_Point;
	unsigned int selected;
	};

	// Partition class
	class TWPartition
	{
	public:
	enum Backup_Method_enum {
	NONE = 0,
	FILES = 1,
	DD = 2,
	FLASH_UTILS = 3,
	};

	public:
	TWPartition();
	virtual ~TWPartition();

	public:
	bool Is_Mounted(); // Checks mount to see if the partition is currently mounted
	bool Mount(bool Display_Error); // Mounts the partition if it is not mounted
	bool UnMount(bool Display_Error); // Unmounts the partition if it is mounted
	bool Wipe(string New_File_System); // Wipes the partition
	bool Wipe(); // Wipes the partition
	bool Wipe_AndSec(); // Wipes android secure
	bool Can_Repair(); // Checks to see if we have everything needed to be able to repair the current file system
	uint64_t Get_Max_FileSize(); //get partition maxFileSie
	bool Repair(); // Repairs the current file system
	bool Backup(string backup_folder, const unsigned long long overall_size, const unsigned long long other_backups_size, pid_t &tar_fork_pid); // Backs up the partition to the folder specified
	bool Check_MD5(string restore_folder); // Checks MD5 of a backup
	bool Restore(string restore_folder, const unsigned long long total_restore_size, unsigned long long already_restored_size); // Restores the partition using the backup folder provided
	unsigned long long Get_Restore_Size(string restore_folder); // Returns the overall restore size of the backup
	string Backup_Method_By_Name(); // Returns a string of the backup method for human readable output
	bool Decrypt(string Password); // Decrypts the partition, return 0 for failure and -1 for success
	bool Wipe_Encryption(); // Ignores wipe commands for /data/media devices and formats the original block device
	void Check_FS_Type(); // Checks the fs type using blkid, does not do anything on MTD / yaffs2 because this crashes on some devices
	bool Update_Size(bool Display_Error); // Updates size information
	void Recreate_Media_Folder(); // Recreates the /data/media folder
	bool Flash_Image(string Filename); // Flashes an image to the partition

	public:
	string Current_File_System; // Current file system
	string Actual_Block_Device; // Actual block device (one of primary, alternate, or decrypted)
	string MTD_Name; // Name of the partition for MTD devices
	bool Is_Present; // Indicates if the partition is currently present as a block device
	string Crypto_Key_Location; // Location of the crypto key used for decrypting encrypted data partitions
	unsigned int MTP_Storage_ID;

	protected:
	bool Has_Data_Media; // Indicates presence of /data/media, may affect wiping and backup methods
	void Setup_Data_Media(); // Sets up a partition as a /data/media emulated storage partition

	private:
	bool Process_Fstab_Line(string Line, bool Display_Error); // Processes a fstab line
	void Find_Actual_Block_Device(); // Determines the correct block device and stores it in Actual_Block_Device

	bool Process_Flags(string Flags, bool Display_Error); // Process custom fstab flags
	bool Process_FS_Flags(string& Options, int Flags); // Process standard fstab fs flags
	bool Is_File_System(string File_System); // Checks to see if the file system given is considered a file system
	bool Is_Image(string File_System); // Checks to see if the file system given is considered an image
	void Setup_File_System(bool Display_Error); // Sets defaults for a file system partition
	void Setup_Image(bool Display_Error); // Sets defaults for an image partition
	void Setup_AndSec(void); // Sets up .android_secure settings
	void Find_Real_Block_Device(string& Block_Device, bool Display_Error); // Checks the block device given and follows symlinks until it gets to the real block device
	bool Find_Partition_Size(); // Finds the partition size from /proc/partitions
	unsigned long long Get_Size_Via_du(string Path, bool Display_Error); // Uses du to get sizes
	bool Wipe_EXT23(string File_System); // Formats as ext3 or ext2
	bool Wipe_EXT4(); // Formats using ext4, uses make_ext4fs when present
	bool Wipe_FAT(); // Formats as FAT if mkdosfs exits otherwise rm -rf wipe
	bool Wipe_EXFAT(); // Formats as EXFAT
	bool Wipe_MTD(); // Formats as yaffs2 for MTD memory types
	bool Wipe_RMRF(); // Uses rm -rf to wipe
	bool Wipe_F2FS(); // Uses mkfs.f2fs to wipe
	bool Wipe_Data_Without_Wiping_Media(); // Uses rm -rf to wipe but does not wipe /data/media
	bool Backup_Tar(string backup_folder, const unsigned long long overall_size, const unsigned long long other_backups_size, pid_t &tar_fork_pid); // Backs up using tar for file systems
	bool Backup_DD(string backup_folder); // Backs up using dd for emmc memory types
	bool Backup_Dump_Image(string backup_folder); // Backs up using dump_image for MTD memory types
	string Get_Restore_File_System(string restore_folder); // Returns the file system that was in place at the time of the backup
	bool Restore_Tar(string restore_folder, string Restore_File_System, const unsigned long long total_restore_size, unsigned long long already_restored_size); // Restore using tar for file systems
	bool Restore_Image(string restore_folder, const unsigned long long total_restore_size, unsigned long long already_restored_size, string Restore_File_System); // Restore using dd for images
	bool Get_Size_Via_statfs(bool Display_Error); // Get Partition size, used, and free space using statfs
	bool Get_Size_Via_df(bool Display_Error); // Get Partition size, used, and free space using df command
	bool Make_Dir(string Path, bool Display_Error); // Creates a directory if it doesn't already exist
	bool Find_MTD_Block_Device(string MTD_Name); // Finds the mtd block device based on the name from the fstab
	void Recreate_AndSec_Folder(void); // Recreates the .android_secure folder
	void Mount_Storage_Retry(void); // Tries multiple times with a half second delay to mount a device in case storage is slow to mount
	bool Flash_Image_DD(string Filename); // Flashes an image to the partition using dd
	bool Flash_Image_FI(string Filename); // Flashes an image to the partition using flash_image for mtd nand

	private:
	bool Can_Be_Mounted; // Indicates that the partition can be mounted
	bool Can_Be_Wiped; // Indicates that the partition can be wiped
	bool Can_Be_Backed_Up; // Indicates that the partition will show up in the backup list
	bool Use_Rm_Rf; // Indicates that the partition will always be formatted w/ "rm -rf *"
	bool Wipe_During_Factory_Reset; // Indicates that this partition is wiped during a factory reset
	bool Wipe_Available_in_GUI; // Inidcates that the wipe can be user initiated in the GUI system
	bool Is_SubPartition; // Indicates that this partition is a sub-partition of another partition (e.g. datadata is a sub-partition of data)
	bool Has_SubPartition; // Indicates that this partition has a sub-partition
	string SubPartition_Of; // Indicates which partition is the parent partition of this partition (e.g. /data is the parent partition of /datadata)
	string Symlink_Path; // Symlink path (e.g. /data/media)
	string Symlink_Mount_Point; // /sdcard could be the symlink mount point for /data/media
	string Mount_Point; // Mount point for this partition (e.g. /system or /data)
	string Backup_Path; // Path for backup
	string Primary_Block_Device; // Block device (e.g. /dev/block/mmcblk1p1)
	string Alternate_Block_Device; // Alternate block device (e.g. /dev/block/mmcblk1)
	string Decrypted_Block_Device; // Decrypted block device available after decryption
	bool Removable; // Indicates if this partition is removable -- affects how often we check overall size, if present, etc.
	int Length; // Used by make_ext4fs to leave free space at the end of the partition block for things like a crypto footer
	unsigned long long Size; // Overall size of the partition
	unsigned long long Used; // Overall used space
	unsigned long long Free; // Overall free space
	unsigned long long Backup_Size; // Backup size -- may be different than used space especially when /data/media is present
	unsigned long long Restore_Size; // Restore size of the current restore operation
	bool Can_Be_Encrypted; // This partition might be encrypted, affects error handling, can only be true if crypto support is compiled in
	bool Is_Encrypted; // This partition is thought to be encrypted -- it wouldn't mount for some reason, only avialble with crypto support
	bool Is_Decrypted; // This partition has successfully been decrypted
	bool Mount_To_Decrypt; // Mount this partition during decrypt (/vendor, /firmware, etc in case we need proprietary libs or firmware files)
	string Display_Name; // Display name for the GUI
	string Backup_Name; // Backup name -- used for backup filenames
	string Backup_Display_Name; // Name displayed in the partition list for backup selection
	string Storage_Name; // Name displayed in the partition list for storage selection
	string Backup_FileName; // Actual backup filename
	Backup_Method_enum Backup_Method; // Method used for backup
	bool Can_Encrypt_Backup; // Indicates if this item can be encrypted during backup
	bool Use_Userdata_Encryption; // Indicates if we will use userdata encryption splitting on an encrypted backup
	bool Has_Android_Secure; // Indicates the presence of .android_secure on this partition
	bool Is_Storage; // Indicates if this partition is used for storage for backup, restore, and installing zips
	bool Is_Settings_Storage; // Indicates that this storage partition is the location of the .twrps settings file and the location that is used for custom themes
	string Storage_Path; // Indicates the path to the storage -- root indicates mount point, media/ indicates e.g. /data/media
	string Fstab_File_System; // File system from the recovery.fstab
	int Mount_Flags; // File system flags from recovery.fstab
	string Mount_Options; // File system options from recovery.fstab
	int Format_Block_Size; // Block size for formatting
	bool Ignore_Blkid; // Ignore blkid results due to superblocks lying to us on certain devices / partitions
	bool Retain_Layout_Version; // Retains the .layout_version file during a wipe (needed on devices like Sony Xperia T where /data and /data/media are separate partitions)
	bool Can_Flash_Img; // Indicates if this partition can have images flashed to it via the GUI

	friend class TWPartitionManager;
	friend class DataManager;
	friend class GUIPartitionList;
	friend class GUIAction;
	};

	class TWPartitionManager
	{
	public:
	TWPartitionManager(); // Constructor for TWRPartionManager
	~TWPartitionManager() {}

	public:
	int Process_Fstab(string Fstab_Filename, bool Display_Error); // Parses the fstab and populates the partitions
	int Write_Fstab(); // Creates /etc/fstab file that's used by the command line for mount commands
	void Output_Partition_Logging(); // Outputs partition information to the log
	int Mount_By_Path(string Path, bool Display_Error); // Mounts partition based on path (e.g. /system)
	int UnMount_By_Path(string Path, bool Display_Error); // Unmounts partition based on path
	int Is_Mounted_By_Path(string Path); // Checks if partition is mounted based on path
	int Mount_Current_Storage(bool Display_Error); // Mounts the current storage location
	int Mount_Settings_Storage(bool Display_Error); // Mounts the settings file storage location (usually internal)
	TWPartition* Find_Partition_By_Path(string Path); // Returns a pointer to a partition based on path
	int Check_Backup_Name(bool Display_Error); // Checks the current backup name to ensure that it is valid
	int Run_Backup(); // Initiates a backup in the current storage
	int Run_Restore(string Restore_Name); // Restores a backup
	void Set_Restore_Files(string Restore_Name); // Used to gather a list of available backup partitions for the user to select for a restore
	int Wipe_By_Path(string Path); // Wipes a partition based on path
	int Wipe_By_Path(string Path, string New_File_System); // Wipes a partition based on path
	int Factory_Reset(); // Performs a factory reset
	int Wipe_Dalvik_Cache(); // Wipes dalvik cache
	int Wipe_Rotate_Data(); // Wipes rotation data --
	int Wipe_Battery_Stats(); // Wipe battery stats -- /data/system/batterystats.bin
	int Wipe_Android_Secure(); // Wipes android secure
	int Format_Data(); // Really formats data on /data/media devices -- also removes encryption
	int Wipe_Media_From_Data(); // Removes and recreates the media folder on /data/media devices
	int Repair_By_Path(string Path, bool Display_Error); // Repairs a partition based on path
	void Update_System_Details(); // Updates fstab, file systems, sizes, etc.
	int Decrypt_Device(string Password); // Attempt to decrypt any encrypted partitions
	int usb_storage_enable(void); // Enable USB storage mode
	int usb_storage_disable(void); // Disable USB storage mode
	void Mount_All_Storage(void); // Mounts all storage locations
	void UnMount_Main_Partitions(void); // Unmounts system and data if not data/media and boot if boot is mountable
	int Partition_SDCard(void); // Repartitions the sdcard
	TWPartition *Get_Default_Storage_Partition(); // Returns a pointer to a default storage partition
	int Cancel_Backup(); // Signals partition backup to cancel
	void Clean_Backup_Folder(string Backup_Folder); // Clean Backup Folder on Error
	int Fix_Permissions();
	void Get_Partition_List(string ListType, std::vector<PartitionList> *Partition_List);
	int Fstab_Processed(); // Indicates if the fstab has been processed or not
	void Output_Storage_Fstab(); // Creates a /cache/recovery/storage.fstab file with a list of all potential storage locations for app use
	bool Enable_MTP(); // Enables MTP
	void Add_All_MTP_Storage(); // Adds all storage objects for MTP
	bool Disable_MTP(); // Disables MTP
	bool Add_MTP_Storage(string Mount_Point); // Adds or removes an MTP Storage partition
	bool Add_MTP_Storage(unsigned int Storage_ID); // Adds or removes an MTP Storage partition
	bool Remove_MTP_Storage(string Mount_Point); // Adds or removes an MTP Storage partition
	bool Remove_MTP_Storage(unsigned int Storage_ID); // Adds or removes an MTP Storage partition
	bool Flash_Image(string Filename); // Flashes an image to a selected partition from the partition list

	TWAtomicInt stop_backup;

	private:
	void Setup_Settings_Storage_Partition(TWPartition* Part); // Sets up settings storage
	void Setup_Android_Secure_Location(TWPartition* Part); // Sets up .android_secure if needed
	bool Make_MD5(bool generate_md5, string Backup_Folder, string Backup_Filename); // Generates an MD5 after a backup is made
	bool Backup_Partition(TWPartition* Part, string Backup_Folder, bool generate_md5, unsigned long long* img_bytes_remaining, unsigned long long* file_bytes_remaining, unsigned long img_time, unsigned long file_time, unsigned long long img_bytes, unsigned long long file_bytes);
	bool Restore_Partition(TWPartition* Part, string Restore_Name, int partition_count, const unsigned long long total_restore_size, unsigned long long already_restored_size);
	void Output_Partition(TWPartition* Part);
	TWPartition* Find_Partition_By_MTP_Storage_ID(unsigned int Storage_ID); // Returns a pointer to a partition based on MTP Storage ID
	bool Add_Remove_MTP_Storage(TWPartition* Part, int message_type); // Adds or removes an MTP Storage partition
	TWPartition* Find_Next_Storage(string Path, string Exclude);
	int Open_Lun_File(string Partition_Path, string Lun_File);
	pid_t mtppid;
	bool mtp_was_enabled;
	int mtp_write_fd;
	pid_t tar_fork_pid;

	private:
	std::vector<TWPartition*> Partitions; // Vector list of all partitions
	};

	extern TWPartitionManager PartitionManager;

	#endif // __TWRP_Partition_Manager