super partition: mount super partitions using fs_mgr
We are now requiring fstab v2 for android-10+ trees. You can
specify twrp flags using /etc/twrp.flags to label and
annotate partitions.
This patchset uses fs_mgr to load the super partition and build
device mapper blocks off vendor and system depending on the slot
in use. These are mapped to partitions in TWRP and allowed to
be mounted read-only. The super partition is also mapped into a
TWRP partition in order to backup the entire partition. You cannot
backup individual device mapper blocks due to the device can only
be read-only. Therefore you cannot write back to the device mapper.
Change-Id: Icc1d895dcf96ad5ba03989c9bf759419d83673a3
diff --git a/partitions.hpp b/partitions.hpp
index 92970d9..cfe6970 100755
--- a/partitions.hpp
+++ b/partitions.hpp
@@ -100,7 +100,7 @@
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_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
@@ -162,6 +162,10 @@
void Set_Backup_FileName(string fname); // Set Backup_FileName for partition
string Get_Backup_Name(); // Get Backup_Name for partition
bool Decrypt_FBE_DE(); // If FBE is present, backup exclusions are set up and DE decrypt is attempted
+ string Get_Mount_Point(); // Return Mount_Point or directory the current partition is mounted on
+ bool Get_Super_Status(); // Returns true if partition is a super volume mounted partitions
+ void Set_Can_Be_Backed_Up(bool val); // Update whether the partition can be backed up or not
+ void Set_Can_Be_Wiped(bool val); // Update whether the partition can be wiped or not
public:
string Current_File_System; // Current file system
@@ -176,6 +180,7 @@
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
+ void Set_Block_Device(std::string block_device); // Allow super partition setup to change block device
private:
bool Process_Fstab_Line(const char *fstab_line, bool Display_Error, std::map<string, Flags_Map> *twrp_flags, bool Sar_Detect); // Processes a fstab line
@@ -281,8 +286,7 @@
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)
- string Key_Directory; // Metadata key directory needed for mounting FBE encrypted data partitions using metadata encryption
-
+ string Key_Directory; // Metadata key directory needed for mounting FBE encrypted data partitions using metadata encryption
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;
@@ -290,6 +294,7 @@
};
std::vector<partition_fs_flags_struct> fs_flags; // This vector stores mount flags and options for different file systems for the same partition
+ bool Is_Super; // States whether partition should be loaded from the super partition
friend class TWPartitionManager;
friend class DataManager;
@@ -361,7 +366,8 @@
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 Prepare_All_Super_Volumes(); // Prepare all known super volumes from super partition
+ bool Is_Super_Partition(const char* fstab_line); // Checks if partition entry is a super partition
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;
@@ -380,6 +386,10 @@
bool Prepare_Repack(TWPartition* Part, const std::string& Temp_Folder_Destination, const bool Create_Backup, const std::string& Backup_Name); // Prepares an image for repacking by unpacking it to the temp folder destination
bool Prepare_Repack(const std::string& Source_Path, const std::string& Temp_Folder_Destination, const bool Copy_Source, const bool Create_Destination = true); // Prepares an image for repacking by unpacking it to the temp folder destination
bool Repack_Images(const std::string& Target_Image, const struct Repack_Options_struct& Repack_Options); // Repacks the boot image with a new kernel or a new ramdisk
+ bool Prepare_Super_Volume(TWPartition* twrpPart); // Prepare logical super partition volume for mounting
+ std::string Get_Super_Partition(); // Get Super Partition block device path
+ void Setup_Super_Devices(); // Setup logical dm devices on super partition
+ bool Get_Super_Status(); // Return whether device has a super partition
private:
void Setup_Settings_Storage_Partition(TWPartition* Part); // Sets up settings storage