| /* |
| Copyright 2014 to 2017 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 <map> |
| #include <vector> |
| #include <string> |
| #include <sys/poll.h> |
| #include "exclude.hpp" |
| #include "tw_atomic.hpp" |
| #include "progresstracking.hpp" |
| |
| #define MAX_FSTAB_LINE_LENGTH 2048 |
| |
| using namespace std; |
| |
| struct PartitionList { |
| std::string Display_Name; |
| std::string Mount_Point; |
| unsigned int selected; |
| }; |
| |
| struct Uevent_Block_Data { |
| std::string action; |
| std::string subsystem; |
| std::string block_device; |
| std::string type; |
| std::string sysfs_path; |
| int major; |
| int minor; |
| }; |
| |
| struct Flags_Map { |
| std::string Primary_Block_Device; |
| std::string Alternate_Block_Device; |
| std::string File_System; |
| std::string Flags; |
| char* fstab_line; |
| }; |
| |
| enum PartitionManager_Op { // PartitionManager Restore Mode for Raw_Read_Write() |
| PM_BACKUP = 0, |
| PM_RESTORE = 1, |
| }; |
| |
| class TWPartition; |
| |
| struct PartitionSettings { // Settings for backup session |
| TWPartition* Part; // Partition to pass to the partition backup loop |
| std::string Backup_Folder; // Path to restore folder |
| bool adbbackup; // tell the system we are backing up over adb |
| bool adb_compression; // 0 == uncompressed, 1 == compressed |
| bool generate_digest; // tell system to create digest for partitions |
| bool generate_md5; // tell system to create md5 for partitions |
| uint64_t total_restore_size; // Total size of restored backup |
| uint64_t img_bytes_remaining; // remaining img/emmc bytes to backup for progress indicator |
| uint64_t file_bytes_remaining; // remaining file bytes to backup for progress indicator |
| uint64_t img_time; // used to calculate how fast we backup images |
| uint64_t file_time; // used to calculate how fast we backup files |
| uint64_t img_bytes; // total image bytes of all emmc partitions |
| uint64_t file_bytes; // total file bytes of all file based partitions |
| int partition_count; // Number of partitions to restore |
| ProgressTracking *progress; // Keep track of progress in GUI |
| enum PartitionManager_Op PM_Method; // Current operation of backup or restore |
| }; |
| |
| enum Backup_Method_enum { |
| BM_NONE = 0, |
| BM_FILES = 1, |
| BM_DD = 2, |
| BM_FLASH_UTILS = 3, |
| }; |
| |
| // Partition class |
| class TWPartition |
| { |
| public: |
| TWPartition(); |
| virtual ~TWPartition(); |
| |
| public: |
| bool Is_Mounted(); // Checks mount to see if the partition is currently mounted |
| bool Is_File_System_Writable(); // Checks if the root directory of the file system can be written to |
| 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 ReMount(bool Display_Error); // Remounts the partition |
| bool ReMount_RW(bool Display_Error); // Remounts the partition with read/write access |
| 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 Can_Resize(); // Checks to see if we have everything needed to be able to resize the current file system |
| bool Resize(); // Resizes the current file system |
| bool Backup(PartitionSettings *part_settings, pid_t *tar_fork_pid); // Backs up the partition to the folder specified |
| bool Restore(PartitionSettings *part_settings); // Restores the partition using the backup folder provided |
| unsigned long long Get_Restore_Size(PartitionSettings *part_settings); // 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(PartitionSettings *part_settings); // Flashes an image to the partition |
| void Change_Mount_Read_Only(bool new_value); // Changes Mount_Read_Only to new_value |
| bool Is_Read_Only(); // Check if system is read-only in TWRP |
| int Check_Lifetime_Writes(); |
| int Decrypt_Adopted(); |
| void Revert_Adopted(); |
| void Partition_Post_Processing(bool Display_Error); // Apply partition specific settings after fstab processed |
| void Set_Backup_FileName(string fname); // Set Backup_FileName for partition |
| string Get_Backup_Name(); // Get Backup_Name for partition |
| |
| public: |
| string Current_File_System; // Current file system |
| string Actual_Block_Device; // Actual block device (one of primary, alternate, or decrypted) |
| string Backup_Display_Name; // Name displayed in the partition list for backup selection |
| 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; |
| string Adopted_GUID; |
| |
| 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(const char *fstab_line, bool Display_Error, std::map<string, Flags_Map> *twrp_flags); // Processes a fstab line |
| void Setup_Data_Partition(bool Display_Error); // Setup data partition after fstab processed |
| void Setup_Cache_Partition(bool Display_Error); // Setup cache partition after fstab processed |
| bool Find_Wildcard_Block_Devices(const string& Device); // Searches for and finds wildcard block devices |
| void Find_Actual_Block_Device(); // Determines the correct block device and stores it in Actual_Block_Device |
| |
| void Apply_TW_Flag(const unsigned flag, const char* str, const bool val); // Apply custom twrp fstab flags |
| void Process_TW_Flags(char *flags, bool Display_Error, int fstab_ver); // Process custom twrp fstab flags |
| void Process_FS_Flags(const char *str); // Process standard fstab fs flags |
| void Save_FS_Flags(const string& local_File_System, int local_Mount_Flags, const string& local_Mount_Options); // Saves fs flags to a vector in case there are multiple lines in a v2 fstab with different mount flags for different file systems |
| 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(); // 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 |
| unsigned long long IOCTL_Get_Block_Size(); // Finds the partition size using ioctl |
| 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 mkfs.fat 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_NTFS(); // Uses mkntfs to wipe |
| bool Wipe_Data_Without_Wiping_Media(); // Uses rm -rf to wipe but does not wipe /data/media |
| bool Wipe_Data_Without_Wiping_Media_Func(const string& parent); // Uses rm -rf to wipe but does not wipe /data/media |
| bool Backup_Tar(PartitionSettings *part_settings, pid_t *tar_fork_pid); // Backs up using tar for file systems |
| bool Backup_Image(PartitionSettings *part_settings); // Backs up using raw read/write for emmc memory types |
| bool Raw_Read_Write(PartitionSettings *part_settings); |
| bool Backup_Dump_Image(PartitionSettings *part_settings); // Backs up using dump_image for MTD memory types |
| string Get_Restore_File_System(PartitionSettings *part_settings); // Returns the file system that was in place at the time of the backup |
| bool Restore_Tar(PartitionSettings *part_settings); // Restore using tar for file systems |
| bool Restore_Image(PartitionSettings *part_settings); // Restore using dd for images |
| bool Check_Restore_File_MD5(const string& Filename); // Verifies MD5 matches for a file before restoration |
| 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 |
| bool Mount_Storage_Retry(bool Display_Error); // Tries multiple times with a half second delay to mount a device in case storage is slow to mount |
| bool Is_Sparse_Image(const string& Filename); // Determines if a file is in sparse image format |
| bool Flash_Sparse_Image(const string& Filename); // Flashes a sparse image using simg2img |
| bool Flash_Image_FI(const string& Filename, ProgressTracking *progress); // Flashes an image to the partition using flash_image for mtd nand |
| void ExcludeAll(const string& path); // Adds an exclusion for path to both the backup and wipe exclusion lists |
| |
| 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 |
| bool Wildcard_Block_Device; // If the block device contains an asterisk, we set this flag |
| string Sysfs_Entry; // For v2 fstab, if the "block device" starts with /devices then it is a sysfs entry that is handled by uevents |
| 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 Is_FBE; // File Based Encryption is present |
| 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 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 |
| unsigned long 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 |
| bool Mount_Read_Only; // Only mount this partition as read-only |
| bool Is_Adopted_Storage; // Indicates that this partition is for adopted storage (android_expand) |
| bool SlotSelect; // Partition has A/B slots |
| TWExclude backup_exclusions; // Exclusions for file based backups |
| TWExclude wipe_exclusions; // Exclusions for file based wipes (data/media devices only) |
| |
| struct partition_fs_flags_struct { // This struct is used to store mount flags and options for different file systems for the same partition |
| string File_System; |
| int Mount_Flags; |
| string Mount_Options; |
| }; |
| |
| std::vector<partition_fs_flags_struct> fs_flags; // This vector stores mount flags and options for different file systems for the same partition |
| |
| friend class TWPartitionManager; |
| friend class DataManager; |
| friend class GUIPartitionList; |
| friend class GUIAction; |
| friend class PageManager; |
| }; |
| |
| 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 |
| void Output_Partition(TWPartition* Part); // Outputs partition details 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(const string& Path); // Returns a pointer to a partition based on path |
| TWPartition* Find_Partition_By_Block_Device(const string& Block_Device); // Returns a pointer to a partition based on block device |
| int Check_Backup_Name(bool Display_Error); // Checks the current backup name to ensure that it is valid |
| int Run_Backup(bool adbbackup); // Initiates a backup in the current storage |
| int Run_Restore(const string& Restore_Name); // Restores a backup |
| bool Write_ADB_Stream_Header(uint64_t partition_count); // Write ADB header over twrpbu FIFO |
| bool Write_ADB_Stream_Trailer(); // Write ADB trailer over twrpbu FIFO |
| 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 |
| int Resize_By_Path(string Path, bool Display_Error); // Resizes 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 Check_Backup_Cancel(); // Returns the value of stop_backup |
| int Cancel_Backup(); // Signals partition backup to cancel |
| void Clean_Backup_Folder(string Backup_Folder); // Clean Backup Folder on Error |
| int Fix_Contexts(); |
| 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 |
| void Translate_Partition(const char* path, const char* resource_name, const char* default_value); |
| void Translate_Partition(const char* path, const char* resource_name, const char* default_value, const char* storage_resource_name, const char* storage_default_value); |
| void Translate_Partition(const char* path, const char* resource_name, const char* default_value, const char* storage_resource_name, const char* storage_default_value, const char* backup_name, const char* backup_default); |
| void Translate_Partition_Display_Names(); // Updates display names based on translations |
| bool Decrypt_Adopted(); // Attempt to identy and decrypt any adopted storage partitions |
| void Remove_Partition_By_Path(string Path); // Removes / erases a partition entry from the partition list |
| |
| bool Flash_Image(string& path, string& filename); // Flashes an image to a selected partition from the partition list |
| bool Restore_Partition(struct PartitionSettings *part_settings); // Restore the partitions based on type |
| TWAtomicInt stop_backup; |
| void Set_Active_Slot(const string& Slot); // Sets the active slot to A or B |
| string Get_Active_Slot_Suffix(); // Returns active slot _a or _b |
| string Get_Active_Slot_Display(); // Returns active slot A or B for display purposes |
| string Get_Android_Root_Path(); // Returns path of ANDROID_ROOT environment variable |
| struct pollfd uevent_pfd; // Used for uevent code |
| void Remove_Uevent_Devices(const string& sysfs_path); // Removes subpartitions from the Partitions vector for a matched uevent device |
| void Handle_Uevent(const Uevent_Block_Data& uevent_data); // Handle uevent data |
| void setup_uevent(); // Opens the uevent netlink socket |
| Uevent_Block_Data get_event_block_values(char *buf, int len); // Scans the buffer from uevent data and loads the appropriate data into a Uevent_Block_Data struct for processing |
| void read_uevent(); // Reads uevent data into a buffer |
| void close_uevent(); // Closes the uevent netlink socket |
| void Add_Partition(TWPartition* Part); // Adds a new partition to the Partitions vector |
| |
| 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 Backup_Partition(struct PartitionSettings *part_settings); // Backup the partitions based on type |
| 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, bool Exclude_Data_Media); |
| int Open_Lun_File(string Partition_Path, string Lun_File); |
| void Post_Decrypt(const string& Block_Device); // Completes various post-decrypt tasks |
| void Coldboot_Scan(std::vector<string> *sysfs_entries, const string& Path, int depth); // Scans subfolders to find matches to the paths stored in sysfs_entries so we can trigger the uevent system to "re-add" devices |
| void Coldboot(); // Starts the scan of the /sys/block folder |
| pid_t mtppid; |
| bool mtp_was_enabled; |
| int mtp_write_fd; |
| pid_t tar_fork_pid; // PID of twrpTar fork |
| Backup_Method_enum Backup_Method; // Method used for backup |
| |
| private: |
| std::vector<TWPartition*> Partitions; // Vector list of all partitions |
| string Active_Slot_Display; // Current Active Slot (A or B) for display purposes |
| }; |
| |
| extern TWPartitionManager PartitionManager; |
| |
| #endif // __TWRP_Partition_Manager |