blob: 18528f11706b244b022fb23fe4f4d15e1ff1f079 [file] [log] [blame]
/*
Copyright 2013 to 2021 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/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/vfs.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <iostream>
#include <libgen.h>
#include <zlib.h>
#include <sstream>
#include <android-base/properties.h>
#include <android-base/strings.h>
#include <libsnapshot/snapshot.h>
#include "cutils/properties.h"
#include "libblkid/include/blkid.h"
#include "variables.h"
#include "twcommon.h"
#include "partitions.hpp"
#include "data.hpp"
#include "twrp-functions.hpp"
#include "twrpTar.hpp"
#include "exclude.hpp"
#include "infomanager.hpp"
#include "set_metadata.h"
#include "gui/gui.hpp"
#include "adbbu/libtwadbbu.hpp"
#ifdef TW_INCLUDE_CRYPTO
// #include "crypto/fde/cryptfs.h"
#include "cryptfs.h"
#include "Decrypt.h"
#endif
extern "C" {
#include "mtdutils/mtdutils.h"
#include "mtdutils/mounts.h"
#ifdef USE_EXT4
// #include "make_ext4fs.h" TODO need ifdef for android8
#include <ext4_utils/make_ext4fs.h>
#endif
#ifdef TW_INCLUDE_CRYPTO
#include "gpt/gpt.h"
#endif
}
#include <selinux/selinux.h>
#include <selinux/label.h>
#ifdef HAVE_CAPABILITIES
#include <sys/capability.h>
#include <sys/xattr.h>
#include <linux/xattr.h>
#endif
#include <sparse_format.h>
#include "progresstracking.hpp"
#define CRYPT_FOOTER_OFFSET 0x4000
using namespace std;
static int auto_index = 0; // v2 fstab allows you to specify a mount point of "auto" with no /. These items are given a mount point of /auto* where * == auto_index
extern struct selabel_handle *selinux_handle;
extern bool datamedia;
struct flag_list {
const char *name;
unsigned long flag;
};
const struct flag_list mount_flags[] = {
{ "noatime", MS_NOATIME },
{ "noexec", MS_NOEXEC },
{ "nosuid", MS_NOSUID },
{ "nodev", MS_NODEV },
{ "nodiratime", MS_NODIRATIME },
{ "ro", MS_RDONLY },
{ "rw", 0 },
{ "remount", MS_REMOUNT },
{ "bind", MS_BIND },
{ "rec", MS_REC },
#ifdef MS_UNBINDABLE
{ "unbindable", MS_UNBINDABLE },
#endif
#ifdef MS_PRIVATE
{ "private", MS_PRIVATE },
#endif
#ifdef MS_SLAVE
{ "slave", MS_SLAVE },
#endif
#ifdef MS_SHARED
{ "shared", MS_SHARED },
#endif
{ "sync", MS_SYNCHRONOUS },
{ 0, 0 },
};
const char *ignored_mount_items[] = {
"defaults=",
"errors=",
"latemount",
"sysfs_path=",
NULL
};
enum TW_FSTAB_FLAGS {
TWFLAG_DEFAULTS, // Retain position
TWFLAG_ANDSEC,
TWFLAG_BACKUP,
TWFLAG_BACKUPNAME,
TWFLAG_BLOCKSIZE,
TWFLAG_CANBEWIPED,
TWFLAG_CANENCRYPTBACKUP,
TWFLAG_DISPLAY,
TWFLAG_ENCRYPTABLE,
TWFLAG_FILEENCRYPTION,
TWFLAG_METADATA_ENCRYPTION,
TWFLAG_FLASHIMG,
TWFLAG_FORCEENCRYPT,
TWFLAG_FSFLAGS,
TWFLAG_IGNOREBLKID,
TWFLAG_LENGTH,
TWFLAG_MOUNTTODECRYPT,
TWFLAG_QUOTA,
TWFLAG_REMOVABLE,
TWFLAG_SETTINGSSTORAGE,
TWFLAG_STORAGE,
TWFLAG_STORAGENAME,
TWFLAG_SUBPARTITIONOF,
TWFLAG_SYMLINK,
TWFLAG_USERDATAENCRYPTBACKUP,
TWFLAG_USERMRF,
TWFLAG_WIPEDURINGFACTORYRESET,
TWFLAG_WIPEINGUI,
TWFLAG_SLOTSELECT,
TWFLAG_WAIT,
TWFLAG_VERIFY,
TWFLAG_CHECK,
TWFLAG_ALTDEVICE,
TWFLAG_NOTRIM,
TWFLAG_VOLDMANAGED,
TWFLAG_FORMATTABLE,
TWFLAG_RESIZE,
TWFLAG_KEYDIRECTORY,
TWFLAG_WRAPPEDKEY,
TWFLAG_ADOPTED_MOUNT_DELAY,
TWFLAG_DM_USE_ORIGINAL_PATH,
TWFLAG_FS_COMPRESS,
TWFLAG_LOGICAL,
};
/* Flags without a trailing '=' are considered dual format flags and can be
* written as either 'flagname' or 'flagname=', where the character following
* the '=' is Y,y,1 for true and false otherwise.
*/
const struct flag_list tw_flags[] = {
{ "andsec", TWFLAG_ANDSEC },
{ "backup", TWFLAG_BACKUP },
{ "backupname=", TWFLAG_BACKUPNAME },
{ "blocksize=", TWFLAG_BLOCKSIZE },
{ "canbewiped", TWFLAG_CANBEWIPED },
{ "canencryptbackup", TWFLAG_CANENCRYPTBACKUP },
{ "defaults", TWFLAG_DEFAULTS },
{ "display=", TWFLAG_DISPLAY },
{ "encryptable=", TWFLAG_ENCRYPTABLE },
{ "fileencryption=", TWFLAG_FILEENCRYPTION },
{ "metadata_encryption=", TWFLAG_METADATA_ENCRYPTION },
{ "flashimg", TWFLAG_FLASHIMG },
{ "forceencrypt=", TWFLAG_FORCEENCRYPT },
{ "fsflags=", TWFLAG_FSFLAGS },
{ "ignoreblkid", TWFLAG_IGNOREBLKID },
{ "length=", TWFLAG_LENGTH },
{ "mounttodecrypt", TWFLAG_MOUNTTODECRYPT },
{ "quota", TWFLAG_QUOTA },
{ "removable", TWFLAG_REMOVABLE },
{ "settingsstorage", TWFLAG_SETTINGSSTORAGE },
{ "storage", TWFLAG_STORAGE },
{ "storagename=", TWFLAG_STORAGENAME },
{ "subpartitionof=", TWFLAG_SUBPARTITIONOF },
{ "symlink=", TWFLAG_SYMLINK },
{ "userdataencryptbackup", TWFLAG_USERDATAENCRYPTBACKUP },
{ "usermrf", TWFLAG_USERMRF },
{ "wipeduringfactoryreset", TWFLAG_WIPEDURINGFACTORYRESET },
{ "wipeingui", TWFLAG_WIPEINGUI },
{ "slotselect", TWFLAG_SLOTSELECT },
{ "wait", TWFLAG_WAIT },
{ "verify", TWFLAG_VERIFY },
{ "check", TWFLAG_CHECK },
{ "altdevice", TWFLAG_ALTDEVICE },
{ "notrim", TWFLAG_NOTRIM },
{ "voldmanaged=", TWFLAG_VOLDMANAGED },
{ "formattable", TWFLAG_FORMATTABLE },
{ "resize", TWFLAG_RESIZE },
{ "keydirectory=", TWFLAG_KEYDIRECTORY },
{ "wrappedkey", TWFLAG_WRAPPEDKEY },
{ "adopted_mount_delay=", TWFLAG_ADOPTED_MOUNT_DELAY },
{ "dm_use_original_path", TWFLAG_DM_USE_ORIGINAL_PATH },
{ "fscompress", TWFLAG_FS_COMPRESS },
{ "logical", TWFLAG_LOGICAL },
{ 0, 0 },
};
TWPartition::TWPartition() {
Can_Be_Mounted = false;
Can_Be_Wiped = false;
Can_Be_Backed_Up = false;
Use_Rm_Rf = false;
Wipe_During_Factory_Reset = false;
Wipe_Available_in_GUI = false;
Is_SubPartition = false;
Has_SubPartition = false;
SubPartition_Of = "";
Symlink_Path = "";
Symlink_Mount_Point = "";
Mount_Point = "";
Backup_Path = "";
Wildcard_Block_Device = false;
Sysfs_Entry = "";
Actual_Block_Device = "";
Primary_Block_Device = "";
Alternate_Block_Device = "";
Removable = false;
Is_Present = false;
Length = 0;
Size = 0;
Used = 0;
Free = 0;
Backup_Size = 0;
Can_Be_Encrypted = false;
Is_Encrypted = false;
Is_Decrypted = false;
Is_FBE = false;
Mount_To_Decrypt = false;
Decrypted_Block_Device = "";
Display_Name = "";
Backup_Display_Name = "";
Storage_Name = "";
Backup_Name = "";
Backup_FileName = "";
MTD_Name = "";
Backup_Method = BM_NONE;
Can_Encrypt_Backup = false;
Use_Userdata_Encryption = false;
Has_Data_Media = false;
Has_Android_Secure = false;
Is_Storage = false;
Is_Settings_Storage = false;
Storage_Path = "";
Current_File_System = "";
Fstab_File_System = "";
Mount_Flags = 0;
Mount_Options = "";
Format_Block_Size = 0;
Ignore_Blkid = false;
Crypto_Key_Location = "";
MTP_Storage_ID = 0;
Can_Flash_Img = false;
Mount_Read_Only = false;
Is_Adopted_Storage = false;
Adopted_GUID = "";
SlotSelect = false;
Key_Directory = "";
Is_Super = false;
Adopted_Mount_Delay = 0;
Original_Path = "";
Use_Original_Path = false;
Needs_Fs_Compress = false;
}
TWPartition::~TWPartition(void) {
// Do nothing
}
bool TWPartition::Process_Fstab_Line(const char *fstab_line, bool Display_Error, std::map<string, Flags_Map> *twrp_flags) {
char full_line[MAX_FSTAB_LINE_LENGTH];
char twflags[MAX_FSTAB_LINE_LENGTH] = "";
char* ptr;
int line_len = strlen(fstab_line), index = 0, item_index = 0;
bool skip = false;
int fstab_version = 1, mount_point_index = 0, fs_index = 1, block_device_index = 2;
TWPartition *additional_entry = NULL;
std::map<string, Flags_Map>::iterator it;
strlcpy(full_line, fstab_line, sizeof(full_line));
for (index = 0; index < line_len; index++) {
if (full_line[index] == 34)
skip = !skip;
if (!skip && full_line[index] <= 32)
full_line[index] = '\0';
}
if (line_len < 10)
return false; // There can't possibly be a valid fstab line that is less than 10 chars
if (fstab_line[0] == '#')
return false; // skip comments
if (strncmp(fstab_line, "/dev/", strlen("/dev/")) == 0 || strncmp(fstab_line, "/devices/", strlen("/devices/")) == 0) {
fstab_version = 2;
block_device_index = 0;
mount_point_index = 1;
fs_index = 2;
}
if (fstab_line[0] != '/') {
block_device_index = 0;
fstab_version = 2;
mount_point_index = 1;
fs_index = 2;
}
index = 0;
while (index < line_len) {
while (index < line_len && full_line[index] == '\0')
index++;
if (index >= line_len)
continue;
ptr = full_line + index;
if (item_index == mount_point_index) {
Mount_Point = ptr;
if (fstab_version == 2 && Is_Super == false) {
additional_entry = PartitionManager.Find_Partition_By_Path(Mount_Point);
if (additional_entry) {
LOGINFO("Found an additional entry for '%s'\n", Mount_Point.c_str());
}
}
LOGINFO("Processing '%s'\n", Mount_Point.c_str());
Backup_Path = Mount_Point;
Storage_Path = Mount_Point;
Display_Name = ptr + 1;
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
item_index++;
} else if (item_index == fs_index) {
// File System
Fstab_File_System = ptr;
Current_File_System = ptr;
item_index++;
} else if (item_index == block_device_index) {
// Primary Block Device
if (Fstab_File_System == "mtd" || Fstab_File_System == "yaffs2") {
MTD_Name = ptr;
Find_MTD_Block_Device(MTD_Name);
} else if (Fstab_File_System == "bml") {
if (Mount_Point == "/boot")
MTD_Name = "boot";
else if (Mount_Point == "/recovery")
MTD_Name = "recovery";
Primary_Block_Device = ptr;
if (*ptr != '/')
LOGERR("Until we get better BML support, you will have to find and provide the full block device path to the BML devices e.g. /dev/block/bml9 instead of the partition name\n");
} else {
Primary_Block_Device = ptr;
if (*ptr == '/')
Find_Real_Block_Device(Primary_Block_Device, Display_Error);
}
item_index++;
} else if (item_index > 2) {
if (fstab_version == 2) {
if (item_index == 3) {
Process_FS_Flags(ptr);
if (additional_entry) {
additional_entry->Save_FS_Flags(Fstab_File_System, Mount_Flags, Mount_Options);
return false; // We save the extra fs flags in the other partition entry and by returning false, this entry will be deleted
}
} else {
strlcpy(twflags, ptr, sizeof(twflags));
}
item_index++;
} else if (*ptr == '/') { // v2 fstab does not allow alternate block devices
// Alternate Block Device
Alternate_Block_Device = ptr;
Find_Real_Block_Device(Alternate_Block_Device, Display_Error);
} else if (strlen(ptr) > 7 && strncmp(ptr, "length=", 7) == 0) {
// Partition length
ptr += 7;
Length = atoi(ptr);
} else if (strlen(ptr) > 6 && strncmp(ptr, "flags=", 6) == 0) {
// Custom flags, save for later so that new values aren't overwritten by defaults
ptr += 6;
strlcpy(twflags, ptr, sizeof(twflags));
} else if (strlen(ptr) == 4 && (strncmp(ptr, "NULL", 4) == 0 || strncmp(ptr, "null", 4) == 0 || strncmp(ptr, "null", 4) == 0)) {
// Do nothing
} else {
// Unhandled data
LOGINFO("Unhandled fstab information '%s' in fstab line '%s'\n", ptr, fstab_line);
}
}
while (index < line_len && full_line[index] != '\0')
index++;
}
// override block devices from the v2 fstab with the ones we read from the twrp.flags file in case they are different
if (fstab_version == 2 && twrp_flags && twrp_flags->size() > 0) {
it = twrp_flags->find(Mount_Point);
if (it != twrp_flags->end()) {
if (!it->second.Primary_Block_Device.empty()) {
Primary_Block_Device = it->second.Primary_Block_Device;
Find_Real_Block_Device(Primary_Block_Device, Display_Error);
}
if (!it->second.Alternate_Block_Device.empty()) {
Alternate_Block_Device = it->second.Alternate_Block_Device;
Find_Real_Block_Device(Alternate_Block_Device, Display_Error);
}
}
}
if (strncmp(fstab_line, "/devices/", strlen("/devices/")) == 0) {
Sysfs_Entry = Primary_Block_Device;
Primary_Block_Device = "";
Is_Storage = true;
Removable = true;
Wipe_Available_in_GUI = true;
Wildcard_Block_Device = true;
}
if (Primary_Block_Device.find("*") != string::npos)
Wildcard_Block_Device = true;
if (Mount_Point == "auto") {
Mount_Point = "/auto";
char autoi[5];
sprintf(autoi, "%i", auto_index);
Mount_Point += autoi;
Backup_Path = Mount_Point;
Storage_Path = Mount_Point;
Backup_Name = Mount_Point.substr(1);
auto_index++;
Setup_File_System(Display_Error);
Display_Name = "Storage";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Can_Be_Backed_Up = false;
Wipe_Available_in_GUI = true;
Is_Storage = true;
Removable = true;
Wipe_Available_in_GUI = true;
} else if (!Is_File_System(Fstab_File_System) && !Is_Image(Fstab_File_System)) {
if (Display_Error)
LOGERR("Unknown File System: '%s'\n", Fstab_File_System.c_str());
else
LOGINFO("Unknown File System: '%s'\n", Fstab_File_System.c_str());
return false;
} else if (Is_File_System(Fstab_File_System)) {
Find_Actual_Block_Device();
Setup_File_System(Display_Error);
Backup_Name = Display_Name = Mount_Point.substr(1, Mount_Point.size() - 1);
if (Mount_Point == "/" || Mount_Point == "/system" || Mount_Point == "/system_root") {
Mount_Point = PartitionManager.Get_Android_Root_Path();
Backup_Path = Mount_Point;
Storage_Path = Mount_Point;
Display_Name = "System";
Backup_Name = "system";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = false;
Can_Be_Backed_Up = false;
Can_Be_Wiped = false;
Make_Dir(PartitionManager.Get_Android_Root_Path(), true);
} else if (Mount_Point == "/system_ext") {
Display_Name = "System_EXT";
Backup_Name = "System_EXT";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Can_Be_Backed_Up = Wipe_Available_in_GUI = Is_Super ? false : true;
} else if (Mount_Point == "/product") {
Display_Name = "Product";
Backup_Name = "Product";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Can_Be_Backed_Up = Wipe_Available_in_GUI = Is_Super ? false : true;
} else if (Mount_Point == "/odm") {
Display_Name = "ODM";
Backup_Name = "ODM";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Can_Be_Backed_Up = Wipe_Available_in_GUI = Is_Super ? false : true;
} else if (Mount_Point == "/data") {
Display_Name = "Data";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = true;
Wipe_During_Factory_Reset = true;
Can_Be_Backed_Up = true;
Can_Encrypt_Backup = true;
Use_Userdata_Encryption = true;
} else if (Mount_Point == "/cache") {
Display_Name = "Cache";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = true;
Wipe_During_Factory_Reset = true;
Can_Be_Backed_Up = true;
} else if (Mount_Point == "/datadata") {
Wipe_During_Factory_Reset = true;
Display_Name = "DataData";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Is_SubPartition = true;
SubPartition_Of = "/data";
DataManager::SetValue(TW_HAS_DATADATA, 1);
Can_Be_Backed_Up = true;
Can_Encrypt_Backup = true;
Use_Userdata_Encryption = false; // This whole partition should be encrypted
} else if (Mount_Point == "/sd-ext") {
Wipe_During_Factory_Reset = true;
Display_Name = "SD-Ext";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = true;
Removable = true;
Can_Be_Backed_Up = true;
Can_Encrypt_Backup = true;
Use_Userdata_Encryption = true;
} else if (Mount_Point == "/boot") {
Display_Name = "Boot";
Backup_Display_Name = Display_Name;
DataManager::SetValue("tw_boot_is_mountable", 1);
Can_Be_Backed_Up = true;
} else if (Mount_Point == "/vendor") {
Display_Name = "Vendor";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
} else if (Mount_Point == "/metadata") {
Display_Name = "Metadata";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
} else if (Mount_Point == "/odm_dlkm") {
Display_Name = "ODM DLKM";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
} else if (Mount_Point == "/vendor_dlkm") {
Display_Name = "Vendor DLKM";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
}
#ifdef TW_EXTERNAL_STORAGE_PATH
if (Mount_Point == EXPAND(TW_EXTERNAL_STORAGE_PATH)) {
Is_Storage = true;
Storage_Path = EXPAND(TW_EXTERNAL_STORAGE_PATH);
Removable = true;
Wipe_Available_in_GUI = true;
#else
if (Mount_Point == "/sdcard" || Mount_Point == "/external_sd" || Mount_Point == "/external_sdcard") {
Is_Storage = true;
Removable = true;
Wipe_Available_in_GUI = true;
#endif
}
#ifdef TW_INTERNAL_STORAGE_PATH
if (Mount_Point == EXPAND(TW_INTERNAL_STORAGE_PATH)) {
Is_Storage = true;
Is_Settings_Storage = true;
Storage_Path = EXPAND(TW_INTERNAL_STORAGE_PATH);
Wipe_Available_in_GUI = true;
}
#else
if (Mount_Point == "/emmc" || Mount_Point == "/internal_sd" || Mount_Point == "/internal_sdcard") {
Is_Storage = true;
Is_Settings_Storage = true;
Wipe_Available_in_GUI = true;
}
#endif
} else if (Is_Image(Fstab_File_System)) {
Find_Actual_Block_Device();
Setup_Image();
if (Mount_Point == "/boot") {
Display_Name = "Boot";
Backup_Display_Name = Display_Name;
Can_Be_Backed_Up = true;
Can_Flash_Img = true;
} else if (Mount_Point == "/init_boot") {
Display_Name = "Init Boot";
Backup_Display_Name = Display_Name;
Can_Be_Backed_Up = true;
Can_Flash_Img = true;
} else if (Mount_Point == "/recovery") {
Display_Name = "Recovery";
Backup_Display_Name = Display_Name;
Can_Flash_Img = true;
} else if (Mount_Point == "/system_image") {
Display_Name = "System Image";
Backup_Display_Name = Display_Name;
Can_Flash_Img = true;
Can_Be_Backed_Up = true;
} else if (Mount_Point == "/vendor_image") {
Display_Name = "Vendor Image";
Backup_Display_Name = Display_Name;
Can_Flash_Img = true;
Can_Be_Backed_Up = true;
}
}
// Process TWRP fstab flags
if (strlen(twflags) > 0) {
string Prev_Display_Name = Display_Name;
string Prev_Storage_Name = Storage_Name;
string Prev_Backup_Display_Name = Backup_Display_Name;
Display_Name = "";
Storage_Name = "";
Backup_Display_Name = "";
Process_TW_Flags(twflags, (fstab_version == 1), fstab_version);
Save_FS_Flags(Fstab_File_System, Mount_Flags, Mount_Options);
bool has_display_name = !Display_Name.empty();
bool has_storage_name = !Storage_Name.empty();
bool has_backup_name = !Backup_Display_Name.empty();
if (!has_display_name) Display_Name = Prev_Display_Name;
if (!has_storage_name) Storage_Name = Prev_Storage_Name;
if (!has_backup_name) Backup_Display_Name = Prev_Backup_Display_Name;
if (has_display_name && !has_storage_name)
Storage_Name = Display_Name;
if (!has_display_name && has_storage_name)
Display_Name = Storage_Name;
if (has_display_name && !has_backup_name && Backup_Display_Name != "Android Secure")
Backup_Display_Name = Display_Name;
if (!has_display_name && has_backup_name)
Display_Name = Backup_Display_Name;
}
if (fstab_version == 2 && twrp_flags && twrp_flags->size() > 0) {
it = twrp_flags->find(Mount_Point);
if (it != twrp_flags->end()) {
char twrpflags[MAX_FSTAB_LINE_LENGTH] = "";
int skip = 0;
string Flags = it->second.Flags;
strcpy(twrpflags, Flags.c_str());
if (strlen(twrpflags) > strlen("flags=") && strncmp(twrpflags, "flags=", strlen("flags=")) == 0)
skip += strlen("flags=");
char* flagptr = twrpflags;
flagptr += skip;
Process_TW_Flags(flagptr, Display_Error, 1); // Forcing the fstab to ver 1 because this data is coming from the /etc/twrp.flags which should be using the TWRP v1 flags format
}
}
if (Mount_Point == "/persist" && Can_Be_Mounted) {
bool mounted = Is_Mounted();
if (mounted || Mount(false)) {
TWFunc::Fixup_Time_On_Boot("/persist/time/");
if (!mounted)
UnMount(false);
}
}
return true;
}
void TWPartition::Partition_Post_Processing(bool Display_Error) {
if (Mount_Point == "/data")
Setup_Data_Partition(Display_Error);
else if (Mount_Point == "/cache")
Setup_Cache_Partition(Display_Error);
}
void TWPartition::ExcludeAll(const string& path) {
backup_exclusions.add_absolute_dir(path);
wipe_exclusions.add_absolute_dir(path);
}
void TWPartition::Setup_Data_Partition(bool Display_Error) {
if (Mount_Point != "/data")
return;
// Ensure /data is not mounted as tmpfs for qcom hardware decrypt
UnMount(false);
#ifdef TW_INCLUDE_CRYPTO
#ifdef TW_PREPARE_DATA_MEDIA_EARLY
if (datamedia)
Setup_Data_Media();
#endif
Can_Be_Encrypted = true;
char crypto_blkdev[255];
property_get("ro.crypto.fs_crypto_blkdev", crypto_blkdev, "error");
if (strcmp(crypto_blkdev, "error") != 0) {
Set_FBE_Status();
Decrypted_Block_Device = crypto_blkdev;
LOGINFO("Data already decrypted, new block device: '%s'\n", crypto_blkdev);
#ifndef TW_PREPARE_DATA_MEDIA_EARLY
if (datamedia)
Setup_Data_Media();
#endif
DataManager::SetValue(TW_IS_ENCRYPTED, 0);
} else if (!Mount(false)) {
if (Is_Present) {
if (Key_Directory.empty()) {
set_partition_data(Use_Original_Path ? Original_Path.c_str() : Actual_Block_Device.c_str(), Crypto_Key_Location.c_str());
if (cryptfs_check_footer() == 0) {
Is_Encrypted = true;
Is_Decrypted = false;
Can_Be_Mounted = false;
Current_File_System = "emmc";
Setup_Image();
DataManager::SetValue(TW_CRYPTO_PWTYPE, cryptfs_get_password_type());
DataManager::SetValue("tw_crypto_pwtype_0", cryptfs_get_password_type());
DataManager::SetValue(TW_CRYPTO_PASSWORD, "");
DataManager::SetValue("tw_crypto_display", "");
if (datamedia)
Setup_Data_Media();
} else {
gui_err("mount_data_footer=Could not mount /data and unable to find crypto footer.");
}
} else {
Is_Encrypted = true;
Is_Decrypted = false;
if (datamedia)
Setup_Data_Media();
}
} else if (Key_Directory.empty()) {
LOGERR("Primary block device '%s' for mount point '%s' is not present!\n",
Primary_Block_Device.c_str(), Mount_Point.c_str());
}
} else {
Set_FBE_Status();
int is_device_fbe;
DataManager::GetValue(TW_IS_FBE, is_device_fbe);
char crypto_state[255];
property_get("ro.crypto.state", crypto_state, "error");
if (!Decrypt_FBE_DE() && strcmp(crypto_state, "error") != 0) {
if (is_device_fbe == 1)
LOGERR("Unable to decrypt FBE device\n");
} else {
DataManager::SetValue(TW_IS_ENCRYPTED, 0);
#ifndef TW_PREPARE_DATA_MEDIA_EARLY
if (datamedia)
Setup_Data_Media();
#endif
}
}
if (datamedia && (!Is_Encrypted || (Is_Encrypted && Is_Decrypted))) {
Setup_Data_Media();
Recreate_Media_Folder();
}
#else
if (datamedia) {
Setup_Data_Media();
Recreate_Media_Folder();
}
#endif
}
void TWPartition::Set_FBE_Status() {
DataManager::SetValue(TW_IS_DECRYPTED, 1);
Is_Encrypted = true;
Is_Decrypted = true;
if (Key_Directory.empty()) {
Is_FBE = false;
DataManager::SetValue(TW_IS_FBE, 0);
} else {
LOGINFO("Setup_Data_Partition::Key_Directory::%s\n", Key_Directory.c_str());
Is_FBE = true;
DataManager::SetValue(TW_IS_FBE, 1);
}
}
bool TWPartition::Decrypt_FBE_DE() {
if (TWFunc::Path_Exists("/data/unencrypted/key/version")) {
DataManager::SetValue(TW_IS_FBE, 1);
PartitionManager.Set_Crypto_State();
PartitionManager.Set_Crypto_Type("file");
LOGINFO("File Based Encryption is present\n");
#ifdef TW_INCLUDE_FBE
Is_FBE = true;
ExcludeAll(Mount_Point + "/convert_fbe");
ExcludeAll(Mount_Point + "/unencrypted");
ExcludeAll(Mount_Point + "/misc/vold/user_keys");
ExcludeAll(Mount_Point + "/misc/vold/volume_keys");
ExcludeAll(Mount_Point + "/system/gatekeeper.password.key");
ExcludeAll(Mount_Point + "/system/gatekeeper.pattern.key");
ExcludeAll(Mount_Point + "/system/locksettings.db");
ExcludeAll(Mount_Point + "/system/locksettings.db-wal");
ExcludeAll(Mount_Point + "/misc/gatekeeper");
ExcludeAll(Mount_Point + "/misc/keystore");
ExcludeAll(Mount_Point + "/drm/kek.dat");
ExcludeAll(Mount_Point + "/system_de/0/spblob"); // contains data needed to decrypt synthetic password
ExcludeAll(Mount_Point + "/system/users/0/gatekeeper.password.key");
ExcludeAll(Mount_Point + "/system/users/0/gatekeeper.pattern.key");
ExcludeAll(Mount_Point + "/cache");
ExcludeAll(Mount_Point + "/per_boot"); // removed each boot by init
ExcludeAll(Mount_Point + "/gsi"); // cow devices
int retry_count = 3;
while (!android::keystore::Decrypt_DE() && --retry_count)
usleep(2000);
if (retry_count > 0) {
PartitionManager.Set_Crypto_State();
Is_Encrypted = true;
Is_Decrypted = false;
DataManager::SetValue(TW_IS_ENCRYPTED, 1);
string filename;
int pwd_type = android::keystore::Get_Password_Type(0, filename);
if (pwd_type < 0) {
LOGERR("This TWRP does not have synthetic password decrypt support\n");
pwd_type = 0; // default password
}
PartitionManager.Parse_Users(); // after load_all_de_keys() to parse_users
std::vector<users_struct>::iterator iter;
std::vector<users_struct>* userList = PartitionManager.Get_Users_List();
for (iter = userList->begin(); iter != userList->end(); iter++) {
if (atoi((*iter).userId.c_str()) != 0) {
ExcludeAll(Mount_Point + "/system_de/" + (*iter).userId + "/spblob");
ExcludeAll(Mount_Point + "/system/users/" + (*iter).userId + "/gatekeeper.password.key");
ExcludeAll(Mount_Point + "/system/users/" + (*iter).userId + "/gatekeeper.pattern.key");
ExcludeAll(Mount_Point + "/system/users/" + (*iter).userId + "/locksettings.db");
ExcludeAll(Mount_Point + "/system/users/" + (*iter).userId + "/locksettings.db-wal");
}
}
DataManager::SetValue(TW_CRYPTO_PWTYPE, pwd_type);
DataManager::SetValue("tw_crypto_pwtype_0", pwd_type);
DataManager::SetValue(TW_CRYPTO_PASSWORD, "");
DataManager::SetValue("tw_crypto_display", "");
return true;
}
#else
LOGERR("FBE found but FBE support not present in TWRP\n");
#endif
}
DataManager::SetValue(TW_IS_FBE, 0);
return false;
}
void TWPartition::Setup_Cache_Partition(bool Display_Error __unused) {
if (Mount_Point != "/cache")
return;
if (!Mount(true))
return;
if (!TWFunc::Path_Exists("/cache/recovery/.")) {
LOGINFO("Recreating /cache/recovery folder\n");
if (mkdir("/cache/recovery", S_IRWXU | S_IRWXG | S_IWGRP | S_IXGRP) != 0)
LOGERR("Could not create /cache/recovery\n");
}
}
void TWPartition::Process_FS_Flags(const char *str) {
char *options = strdup(str);
char *ptr, *savep;
Mount_Options = "";
// Avoid issues with potentially nested strtok by using strtok_r
for (ptr = strtok_r(options, ",", &savep); ptr; ptr = strtok_r(NULL, ",", &savep)) {
char *equals = strstr(ptr, "=");
size_t name_len;
if (!equals)
name_len = strlen(ptr);
else
name_len = equals - ptr;
// There are some flags that we want to ignore in TWRP
bool found_match = false;
for (const char** ignored_mount_item = ignored_mount_items; *ignored_mount_item; ignored_mount_item++) {
if (strncmp(ptr, *ignored_mount_item, name_len) == 0) {
found_match = true;
break;
}
}
if (found_match)
continue;
// mount_flags are never postfixed by '='
if (!equals) {
const struct flag_list* mount_flag = mount_flags;
for (; mount_flag->name; mount_flag++) {
if (strcmp(ptr, mount_flag->name) == 0) {
if (mount_flag->flag == MS_RDONLY)
Mount_Read_Only = true;
else
Mount_Flags |= (unsigned)mount_flag->flag;
found_match = true;
break;
}
}
if (found_match)
continue;
}
// If we aren't ignoring this flag and it's not a mount flag, then it must be a mount option
if (!Mount_Options.empty())
Mount_Options += ",";
Mount_Options += ptr;
}
free(options);
}
void TWPartition::Save_FS_Flags(const string& local_File_System, int local_Mount_Flags, const string& local_Mount_Options) {
partition_fs_flags_struct flags;
flags.File_System = local_File_System;
flags.Mount_Flags = local_Mount_Flags;
flags.Mount_Options = local_Mount_Options;
fs_flags.push_back(flags);
}
void TWPartition::Apply_TW_Flag(const unsigned flag, const char* str, const bool val) {
switch (flag) {
case TWFLAG_ANDSEC:
Has_Android_Secure = val;
break;
case TWFLAG_BACKUP:
Can_Be_Backed_Up = val;
break;
case TWFLAG_BACKUPNAME:
Backup_Display_Name = str;
break;
case TWFLAG_BLOCKSIZE:
Format_Block_Size = (unsigned long)(atol(str));
break;
case TWFLAG_CANBEWIPED:
Can_Be_Wiped = val;
break;
case TWFLAG_CANENCRYPTBACKUP:
Can_Encrypt_Backup = val;
break;
case TWFLAG_DEFAULTS:
case TWFLAG_WAIT:
case TWFLAG_VERIFY:
case TWFLAG_CHECK:
case TWFLAG_NOTRIM:
case TWFLAG_VOLDMANAGED:
case TWFLAG_RESIZE:
// Do nothing
break;
case TWFLAG_DISPLAY:
Display_Name = str;
break;
case TWFLAG_ENCRYPTABLE:
case TWFLAG_FORCEENCRYPT:
Crypto_Key_Location = str;
break;
case TWFLAG_FILEENCRYPTION:
// This flag isn't used by TWRP but is needed in 9.0 FBE decrypt
// fileencryption=ice:aes-256-heh
{
std::string FBE = str;
size_t colon_loc = FBE.find(":");
if (colon_loc == std::string::npos) {
property_set("fbe.contents", FBE.c_str());
property_set("fbe.filenames", "");
LOGINFO("FBE contents '%s', filenames ''\n", FBE.c_str());
break;
}
std::string FBE_contents, FBE_filenames;
FBE_contents = FBE.substr(0, colon_loc);
FBE_filenames = FBE.substr(colon_loc + 1);
property_set("fbe.contents", FBE_contents.c_str());
property_set("fbe.filenames", FBE_filenames.c_str());
LOGINFO("FBE contents '%s', filenames '%s'\n", FBE_contents.c_str(), FBE_filenames.c_str());
}
break;
case TWFLAG_METADATA_ENCRYPTION:
// This flag isn't used by TWRP but is needed for FBEv2 metadata decryption
// metadata_encryption=aes-256-xts:wrappedkey_v0
{
std::string META = str;
size_t colon_loc = META.find(":");
if (colon_loc == std::string::npos) {
property_set("metadata.contents", META.c_str());
property_set("metadata.filenames", "");
LOGINFO("Metadata contents '%s', filenames ''\n", META.c_str());
break;
}
std::string META_contents, META_filenames;
META_contents = META.substr(0, colon_loc);
META_filenames = META.substr(colon_loc + 1);
property_set("metadata.contents", META_contents.c_str());
property_set("metadata.filenames", META_filenames.c_str());
LOGINFO("Metadata contents '%s', filenames '%s'\n", META_contents.c_str(), META_filenames.c_str());
}
break;
case TWFLAG_WRAPPEDKEY:
// no more processing needed. leaving it here in case we want to do something in the future
break;
case TWFLAG_FLASHIMG:
Can_Flash_Img = val;
break;
case TWFLAG_FSFLAGS:
Process_FS_Flags(str);
break;
case TWFLAG_IGNOREBLKID:
Ignore_Blkid = val;
break;
case TWFLAG_LENGTH:
Length = atoi(str);
break;
case TWFLAG_MOUNTTODECRYPT:
Mount_To_Decrypt = val;
break;
case TWFLAG_QUOTA:
// Filesystem flag - TWRP does not need to process
break;
case TWFLAG_REMOVABLE:
Removable = val;
break;
case TWFLAG_SETTINGSSTORAGE:
Is_Settings_Storage = val;
if (Is_Settings_Storage)
Is_Storage = true;
break;
case TWFLAG_STORAGE:
Is_Storage = val;
break;
case TWFLAG_STORAGENAME:
Storage_Name = str;
break;
case TWFLAG_SUBPARTITIONOF:
Is_SubPartition = true;
SubPartition_Of = str;
break;
case TWFLAG_SYMLINK:
Symlink_Path = str;
break;
case TWFLAG_USERDATAENCRYPTBACKUP:
Use_Userdata_Encryption = val;
if (Use_Userdata_Encryption)
Can_Encrypt_Backup = true;
break;
case TWFLAG_USERMRF:
Use_Rm_Rf = val;
break;
case TWFLAG_WIPEDURINGFACTORYRESET:
Wipe_During_Factory_Reset = val;
if (Wipe_During_Factory_Reset) {
Can_Be_Wiped = true;
Wipe_Available_in_GUI = true;
}
break;
case TWFLAG_WIPEINGUI:
case TWFLAG_FORMATTABLE:
Wipe_Available_in_GUI = val;
if (Wipe_Available_in_GUI)
Can_Be_Wiped = true;
break;
case TWFLAG_SLOTSELECT:
SlotSelect = true;
break;
case TWFLAG_ALTDEVICE:
Alternate_Block_Device = str;
break;
case TWFLAG_ADOPTED_MOUNT_DELAY:
Adopted_Mount_Delay = atoi(str);
break;
case TWFLAG_KEYDIRECTORY:
Key_Directory = str;
LOGINFO("setting Key_Directory to: %s\n", Key_Directory.c_str());
break;
case TWFLAG_DM_USE_ORIGINAL_PATH:
Use_Original_Path = true;
break;
case TWFLAG_LOGICAL:
Is_Super = true;
break;
case TWFLAG_FS_COMPRESS:
#ifdef TW_ENABLE_FS_COMPRESSION
Needs_Fs_Compress = true;
LOGINFO("Enabling 'fs compression'\n");
#else
LOGINFO("Ignoring the 'fscompress' fstab flag\n");
#endif
break;
default:
// Should not get here
LOGINFO("Flag identified for processing, but later unmatched: %i\n", flag);
break;
}
}
void TWPartition::Process_TW_Flags(char *flags, bool Display_Error, int fstab_ver) {
char separator[2] = {'\n', 0};
char *ptr, *savep;
char source_separator = ';';
if (fstab_ver == 2)
source_separator = ',';
// Semicolons within double-quotes are not forbidden, so replace
// only the semicolons intended as separators with '\n' for strtok
for (unsigned i = 0, skip = 0; i < strlen(flags); i++) {
if (flags[i] == '\"')
skip = !skip;
if (!skip && flags[i] == source_separator)
flags[i] = separator[0];
}
// Avoid issues with potentially nested strtok by using strtok_r
ptr = strtok_r(flags, separator, &savep);
while (ptr) {
int ptr_len = strlen(ptr);
const struct flag_list* tw_flag = tw_flags;
for (; tw_flag->name; tw_flag++) {
int flag_len = strlen(tw_flag->name);
if (strncmp(ptr, tw_flag->name, flag_len) == 0) {
bool flag_val = false;
if (ptr_len > flag_len && (tw_flag->name)[flag_len-1] != '='
&& ptr[flag_len] != '=') {
// Handle flags with same starting string
// (e.g. backup and backupname)
continue;
} else if (ptr_len > flag_len && ptr[flag_len] == '=') {
// Handle flags with dual format: Part 1
// (e.g. backup and backup=y. backup=y handled here)
ptr += flag_len + 1;
TWFunc::Strip_Quotes(ptr);
// Skip flags with empty argument
// (e.g. backup=)
if (strlen(ptr) == 0) {
LOGINFO("Flag missing argument or should not include '=': %s=\n", tw_flag->name);
break;
}
flag_val = strchr("yY1", *ptr) != NULL;
} else if (ptr_len == flag_len
&& (tw_flag->name)[flag_len-1] == '=') {
// Skip flags missing argument after =
// (e.g. backupname=)
LOGINFO("Flag missing argument: %s\n", tw_flag->name);
break;
} else if (ptr_len > flag_len
&& (tw_flag->name)[flag_len-1] == '=') {
// Handle arguments to flags
// (e.g. backupname="My Stuff")
ptr += flag_len;
TWFunc::Strip_Quotes(ptr);
// Skip flags with empty argument
// (e.g. backupname="")
if (strlen(ptr) == 0) {
LOGINFO("Flag missing argument: %s\n", tw_flag->name);
break;
}
} else if (ptr_len == flag_len) {
// Handle flags with dual format: Part 2
// (e.g. backup and backup=y. backup handled here)
flag_val = true;
} else {
LOGINFO("Flag matched, but could not be processed: %s\n", ptr);
break;
}
Apply_TW_Flag(tw_flag->flag, ptr, flag_val);
break;
}
}
if (tw_flag->name == 0) {
if (Display_Error)
LOGERR("Unhandled flag: '%s'\n", ptr);
else
LOGINFO("Unhandled flag: '%s'\n", ptr);
}
ptr = strtok_r(NULL, separator, &savep);
}
}
bool TWPartition::Is_File_System(string File_System) {
if (File_System == "ext2" ||
File_System == "ext3" ||
File_System == "ext4" ||
File_System == "vfat" ||
File_System == "ntfs" ||
File_System == "yaffs2" ||
File_System == "exfat" ||
File_System == "f2fs" ||
File_System == "erofs" ||
File_System == "squashfs" ||
File_System == "auto")
return true;
else
return false;
}
bool TWPartition::Is_Image(string File_System) {
if (File_System == "emmc" || File_System == "mtd" || File_System == "bml")
return true;
else
return false;
}
bool TWPartition::Make_Dir(string Path, bool Display_Error) {
if (TWFunc::Get_D_Type_From_Stat(Path) != S_IFDIR)
unlink(Path.c_str());
if (!TWFunc::Path_Exists(Path)) {
if (mkdir(Path.c_str(), 0777) == -1) {
if (Display_Error)
gui_msg(Msg(msg::kError, "create_folder_strerr=Can not create '{1}' folder ({2}).")(Path)(strerror(errno)));
else
LOGINFO("Can not create '%s' folder.\n", Path.c_str());
return false;
} else {
LOGINFO("Created '%s' folder.\n", Path.c_str());
return true;
}
}
return true;
}
void TWPartition::Setup_File_System(bool Display_Error) {
Can_Be_Mounted = true;
Can_Be_Wiped = true;
// Make the mount point folder if it doesn't exist
Make_Dir(Mount_Point, Display_Error);
Backup_Method = BM_FILES;
}
void TWPartition::Setup_Image() {
Display_Name = Mount_Point.substr(1, Mount_Point.size() - 1);
Backup_Name = Display_Name;
if (Current_File_System == "emmc")
Backup_Method = BM_DD;
else if (Current_File_System == "mtd" || Current_File_System == "bml")
Backup_Method = BM_FLASH_UTILS;
else
LOGINFO("Unhandled file system '%s' on image '%s'\n", Current_File_System.c_str(), Display_Name.c_str());
}
void TWPartition::Setup_AndSec(void) {
Backup_Display_Name = "Android Secure";
Backup_Name = "and-sec";
Can_Be_Backed_Up = true;
Has_Android_Secure = true;
Symlink_Path = Mount_Point + "/.android_secure";
Symlink_Mount_Point = "/and-sec";
Backup_Path = Symlink_Mount_Point;
Make_Dir("/and-sec", true);
Recreate_AndSec_Folder();
Mount_Storage_Retry(true);
}
void TWPartition::Setup_Data_Media() {
LOGINFO("Setting up '%s' as data/media emulated storage.\n", Mount_Point.c_str());
if (Storage_Name.empty() || Storage_Name == "Data")
Storage_Name = "Internal Storage";
Has_Data_Media = true;
Is_Storage = true;
Storage_Path = Mount_Point + "/media";
Symlink_Path = Storage_Path;
if (Mount_Point == "/data") {
Is_Settings_Storage = true;
if (strcmp(EXPAND(TW_EXTERNAL_STORAGE_PATH), "/sdcard") == 0) {
Make_Dir("/emmc", false);
Symlink_Mount_Point = "/emmc";
} else {
Make_Dir("/sdcard", false);
Symlink_Mount_Point = "/sdcard";
}
#ifdef TW_PREPARE_DATA_MEDIA_EARLY
if (Mount(false) && TWFunc::Path_Exists(Mount_Point + "/media/0")) {
#else
Mount(false);
if (TWFunc::Path_Exists(Mount_Point + "/media/0")) {
#endif
Storage_Path = Mount_Point + "/media/0";
Symlink_Path = Storage_Path;
DataManager::SetValue(TW_INTERNAL_PATH, Mount_Point + "/media/0");
UnMount(true);
}
DataManager::SetValue("tw_has_internal", 1);
DataManager::SetValue("tw_has_data_media", 1);
backup_exclusions.add_absolute_dir("/data/data/com.google.android.music/files");
backup_exclusions.add_absolute_dir("/data/per_boot"); // DJ9,14Jan2020 - exclude this dir to prevent "error 255" on AOSP ROMs that create and lock it
backup_exclusions.add_absolute_dir("/data/vendor/dumpsys");
backup_exclusions.add_absolute_dir("/data/cache");
backup_exclusions.add_absolute_dir("/data/misc/apexdata/com.android.art"); // exclude this dir to prevent "error 255" on AOSP Android 12
backup_exclusions.add_absolute_dir("/data/extm"); //exclude this dir to prevent "error 255" on MIUI
backup_exclusions.add_absolute_dir("/data/gsi"); // Contains huge files (DSU System image + Userdata image), and won't work after restoration (requires configuration files in metadata)
wipe_exclusions.add_absolute_dir(Mount_Point + "/misc/vold"); // adopted storage keys
ExcludeAll(Mount_Point + "/system/storage.xml");
backup_exclusions.add_absolute_dir("/data/system/users/0/package-restrictions.xml");
// board-customisable exclusions
#ifdef TW_BACKUP_EXCLUSIONS
std::vector<std::string> user_extra_exclusions = TWFunc::Split_String(TW_BACKUP_EXCLUSIONS, ",");
std::string s1;
for (const std::string& extra_x : user_extra_exclusions) {
s1 = android::base::Trim(extra_x);
if (!s1.empty()) {
backup_exclusions.add_absolute_dir(s1);
LOGINFO("Adding user-defined path '%s' to the backup exclusions\n", s1.c_str());
}
}
#endif
} else {
int i;
string path;
for (i = 2; i <= 9; i++) {
path = "/sdcard" + TWFunc::to_string(i);
if (!TWFunc::Path_Exists(path)) {
Make_Dir(path, false);
Symlink_Mount_Point = path;
LOGINFO("'%s' data/media emulated storage symlinked to %s.\n", Mount_Point.c_str(), Symlink_Mount_Point.c_str());
break;
}
}
if (Mount(true) && TWFunc::Path_Exists(Mount_Point + "/media/0")) {
Storage_Path = Mount_Point + "/media/0";
Symlink_Path = Storage_Path;
UnMount(true);
}
}
ExcludeAll(Mount_Point + "/media");
}
void TWPartition::Find_Real_Block_Device(string& Block, bool Display_Error) {
char device[PATH_MAX], realDevice[PATH_MAX];
Original_Path = Block;
strcpy(device, Block.c_str());
memset(realDevice, 0, sizeof(realDevice));
while (readlink(device, realDevice, sizeof(realDevice)) > 0)
{
strcpy(device, realDevice);
memset(realDevice, 0, sizeof(realDevice));
}
Block = device;
return;
}
bool TWPartition::Mount_Storage_Retry(bool Display_Error) {
// On some devices, storage doesn't want to mount right away, retry and sleep
if (!Mount(Display_Error)) {
int retry_count = 5;
while (retry_count > 0 && !Mount(false)) {
usleep(500000);
retry_count--;
}
return Mount(Display_Error);
}
return true;
}
bool TWPartition::Find_MTD_Block_Device(string MTD_Name) {
FILE *fp = NULL;
char line[255];
fp = fopen("/proc/mtd", "rt");
if (fp == NULL) {
LOGERR("Device does not support /proc/mtd\n");
return false;
}
while (fgets(line, sizeof(line), fp) != NULL)
{
char device[32], label[32];
unsigned long size = 0;
int deviceId;
sscanf(line, "%s %lx %*s %*c%s", device, &size, label);
// Skip header and blank lines
if ((strcmp(device, "dev:") == 0) || (strlen(line) < 8))
continue;
// Strip off the trailing " from the label
label[strlen(label)-1] = '\0';
if (strcmp(label, MTD_Name.c_str()) == 0) {
// We found our device
// Strip off the trailing : from the device
device[strlen(device)-1] = '\0';
if (sscanf(device,"mtd%d", &deviceId) == 1) {
sprintf(device, "/dev/block/mtdblock%d", deviceId);
Primary_Block_Device = device;
fclose(fp);
return true;
}
}
}
fclose(fp);
return false;
}
bool TWPartition::Get_Size_Via_statfs(bool Display_Error) {
struct statfs st;
string Local_Path = Mount_Point + "/.";
if (!Mount(Display_Error))
return false;
if (statfs(Local_Path.c_str(), &st) != 0) {
if (!Removable) {
if (Display_Error)
LOGERR("Unable to statfs '%s'\n", Local_Path.c_str());
else
LOGINFO("Unable to statfs '%s'\n", Local_Path.c_str());
}
return false;
}
Size = (st.f_blocks * st.f_bsize);
Used = ((st.f_blocks - st.f_bfree) * st.f_bsize);
Free = (st.f_bfree * st.f_bsize);
Backup_Size = Used;
return true;
}
bool TWPartition::Get_Size_Via_df(bool Display_Error) {
FILE* fp;
char command[255], line[512];
int include_block = 1;
unsigned int min_len;
if (!Mount(Display_Error))
return false;
min_len = Actual_Block_Device.size() + 2;
sprintf(command, "df %s > /tmp/dfoutput.txt", Mount_Point.c_str());
TWFunc::Exec_Cmd(command);
fp = fopen("/tmp/dfoutput.txt", "rt");
if (fp == NULL) {
LOGINFO("Unable to open /tmp/dfoutput.txt.\n");
return false;
}
while (fgets(line, sizeof(line), fp) != NULL)
{
unsigned long blocks, used, available;
char device[64];
char tmpString[64];
if (strncmp(line, "Filesystem", 10) == 0)
continue;
if (strlen(line) < min_len) {
include_block = 0;
continue;
}
if (include_block) {
sscanf(line, "%s %lu %lu %lu", device, &blocks, &used, &available);
} else {
// The device block string is so long that the df information is on the next line
int space_count = 0;
sprintf(tmpString, "/dev/block/%s", Actual_Block_Device.c_str());
while (tmpString[space_count] == 32)
space_count++;
sscanf(line + space_count, "%lu %lu %lu", &blocks, &used, &available);
}
// Adjust block size to byte size
Size = blocks * 1024ULL;
Used = used * 1024ULL;
Free = available * 1024ULL;
Backup_Size = Used;
}
fclose(fp);
return true;
}
unsigned long long TWPartition::IOCTL_Get_Block_Size() {
Find_Actual_Block_Device();
return TWFunc::IOCTL_Get_Block_Size(Actual_Block_Device.c_str());
}
bool TWPartition::Find_Partition_Size(void) {
FILE* fp;
char line[512];
string tmpdevice;
fp = fopen("/proc/dumchar_info", "rt");
if (fp != NULL) {
while (fgets(line, sizeof(line), fp) != NULL)
{
char label[32], device[32];
unsigned long size = 0;
sscanf(line, "%s %lx %*x %*u %s", label, &size, device);
// Skip header, annotation and blank lines
if ((strncmp(device, "/dev/", 5) != 0) || (strlen(line) < 8))
continue;
tmpdevice = "/dev/";
tmpdevice += label;
if (tmpdevice == Primary_Block_Device || tmpdevice == Alternate_Block_Device) {
Size = size;
fclose(fp);
return true;
}
}
}
unsigned long long ioctl_size = IOCTL_Get_Block_Size();
if (ioctl_size) {
Size = ioctl_size;
return true;
}
// In this case, we'll first get the partitions we care about (with labels)
fp = fopen("/proc/partitions", "rt");
if (fp == NULL)
return false;
while (fgets(line, sizeof(line), fp) != NULL)
{
unsigned long major, minor, blocks;
char device[512];
if (strlen(line) < 7 || line[0] == 'm') continue;
sscanf(line + 1, "%lu %lu %lu %s", &major, &minor, &blocks, device);
tmpdevice = "/dev/block/";
tmpdevice += device;
if (tmpdevice == Primary_Block_Device || tmpdevice == Alternate_Block_Device) {
// Adjust block size to byte size
Size = blocks * 1024ULL;
fclose(fp);
return true;
}
}
fclose(fp);
return false;
}
bool TWPartition::Is_Mounted(void) {
if (!Can_Be_Mounted)
return false;
struct stat st1, st2;
string test_path;
// Check to see if the mount point directory exists
test_path = Mount_Point + "/.";
if (stat(test_path.c_str(), &st1) != 0) return false;
// Check to see if the directory above the mount point exists
test_path = Mount_Point + "/../.";
if (stat(test_path.c_str(), &st2) != 0) return false;
// Compare the device IDs -- if they match then we're (probably) using tmpfs instead of an actual device
int ret = (st1.st_dev != st2.st_dev) ? true : false;
return ret;
}
bool TWPartition::Is_File_System_Writable(void) {
if (!Is_File_System(Current_File_System) || !Is_Mounted())
return false;
string test_path = Mount_Point + "/.";
return (access(test_path.c_str(), W_OK) == 0);
}
bool TWPartition::Mount(bool Display_Error) {
int exfat_mounted = 0;
unsigned int flags = Mount_Flags;
if (Is_Mounted()) {
return true;
} else if (!Can_Be_Mounted) {
return false;
}
Find_Actual_Block_Device();
// Check the current file system before mounting
Check_FS_Type();
if (Current_File_System == "exfat" && TWFunc::Path_Exists("/system/bin/exfat-fuse")) {
string cmd = "/system/bin/exfat-fuse -o big_writes,max_read=131072,max_write=131072 " + Actual_Block_Device + " " + Mount_Point;
LOGINFO("cmd: %s\n", cmd.c_str());
string result;
if (TWFunc::Exec_Cmd(cmd, result, false) != 0) {
LOGINFO("exfat-fuse failed to mount with result '%s', trying vfat\n", result.c_str());
Current_File_System = "vfat";
} else {
#ifdef TW_NO_EXFAT_FUSE
UnMount(false);
// We'll let the kernel handle it but using exfat-fuse to detect if the file system is actually exfat
// Some kernels let us mount vfat as exfat which doesn't work out too well
#else
exfat_mounted = 1;
#endif
}
}
if (Current_File_System == "ntfs" && !TWFunc::Path_Exists("/sys/module/tntfs") && (TWFunc::Path_Exists("/system/bin/ntfs-3g") || TWFunc::Path_Exists("/system/bin/mount.ntfs"))) {
string cmd;
string Ntfsmount_Binary = "";
if (TWFunc::Path_Exists("/system/bin/ntfs-3g"))
Ntfsmount_Binary = "ntfs-3g";
else if (TWFunc::Path_Exists("/system/bin/mount.ntfs"))
Ntfsmount_Binary = "mount.ntfs";
if (Mount_Read_Only)
cmd = "/system/bin/" + Ntfsmount_Binary + " -o ro " + Actual_Block_Device + " " + Mount_Point;
else
cmd = "/system/bin/" + Ntfsmount_Binary + " " + Actual_Block_Device + " " + Mount_Point;
LOGINFO("cmd: '%s'\n", cmd.c_str());
if (TWFunc::Exec_Cmd(cmd) == 0) {
return true;
} else {
LOGINFO("ntfs-3g failed to mount, trying regular mount method.\n");
}
} else {
if (Current_File_System == "ntfs" && TWFunc::Path_Exists("/sys/module/tntfs"))
Current_File_System = "tntfs";
}
if (Mount_Read_Only)
flags |= MS_RDONLY;
if (Fstab_File_System == "yaffs2") {
// mount an MTD partition as a YAFFS2 filesystem.
flags = MS_NOATIME | MS_NODEV | MS_NODIRATIME;
if (Mount_Read_Only)
flags |= MS_RDONLY;
if (mount(Actual_Block_Device.c_str(), Mount_Point.c_str(), Fstab_File_System.c_str(), flags, NULL) < 0) {
if (mount(Actual_Block_Device.c_str(), Mount_Point.c_str(), Fstab_File_System.c_str(), flags | MS_RDONLY, NULL) < 0) {
if (Display_Error)
gui_msg(Msg(msg::kError, "fail_mount=Failed to mount '{1}' ({2})")(Mount_Point)(strerror(errno)));
else
LOGINFO("Failed to mount '%s' (MTD)\n", Mount_Point.c_str());
return false;
} else {
LOGINFO("Mounted '%s' (MTD) as RO\n", Mount_Point.c_str());
return true;
}
} else {
struct stat st;
string test_path = Mount_Point;
if (stat(test_path.c_str(), &st) < 0) {
if (Display_Error)
gui_msg(Msg(msg::kError, "fail_mount=Failed to mount '{1}' ({2})")(Mount_Point)(strerror(errno)));
else
LOGINFO("Failed to mount '%s' (MTD)\n", Mount_Point.c_str());
return false;
}
mode_t new_mode = st.st_mode | S_IXUSR | S_IXGRP | S_IXOTH;
if (new_mode != st.st_mode) {
LOGINFO("Fixing execute permissions for %s\n", Mount_Point.c_str());
if (chmod(Mount_Point.c_str(), new_mode) < 0) {
if (Display_Error)
LOGERR("Couldn't fix permissions for %s: %s\n", Mount_Point.c_str(), strerror(errno));
else
LOGINFO("Couldn't fix permissions for %s: %s\n", Mount_Point.c_str(), strerror(errno));
return false;
}
}
return true;
}
}
string mount_fs = Current_File_System;
if (Current_File_System == "exfat" && TWFunc::Path_Exists("/sys/module/texfat"))
mount_fs = "texfat";
if (!exfat_mounted &&
mount(Actual_Block_Device.c_str(), Mount_Point.c_str(), mount_fs.c_str(), flags, Mount_Options.c_str()) != 0 &&
mount(Actual_Block_Device.c_str(), Mount_Point.c_str(), mount_fs.c_str(), flags, NULL) != 0) {
#ifdef TW_NO_EXFAT_FUSE
if (Current_File_System == "exfat") {
LOGINFO("Mounting exfat failed, trying vfat...\n");
if (mount(Actual_Block_Device.c_str(), Mount_Point.c_str(), "vfat", 0, NULL) != 0) {
if (Display_Error)
gui_msg(Msg(msg::kError, "fail_mount=Failed to mount '{1}' ({2})")(Mount_Point)(strerror(errno)));
else
LOGINFO("Unable to mount '%s'\n", Mount_Point.c_str());
LOGINFO("Actual block device: '%s', current file system: '%s', flags: 0x%8x, options: '%s'\n", Actual_Block_Device.c_str(), Current_File_System.c_str(), flags, Mount_Options.c_str());
return false;
}
} else {
#endif
if (!Removable && Display_Error)
gui_msg(Msg(msg::kError, "fail_mount=Failed to mount '{1}' ({2})")(Mount_Point)(strerror(errno)));
else
LOGINFO("Unable to mount '%s'\n", Mount_Point.c_str());
LOGINFO("Actual block device: '%s', current file system: '%s'\n", Actual_Block_Device.c_str(), Current_File_System.c_str());
return false;
#ifdef TW_NO_EXFAT_FUSE
}
#endif
}
if (Removable)
Update_Size(Display_Error);
if (!Symlink_Mount_Point.empty()) {
if (!Bind_Mount(false))
return false;
}
return true;
}
bool TWPartition::Bind_Mount(bool Display_Error) {
if (TWFunc::Path_Exists(Symlink_Path)) {
if (mount(Symlink_Path.c_str(), Symlink_Mount_Point.c_str(), "", MS_BIND, NULL) < 0) {
return false;
}
}
return true;
}
bool TWPartition::UnMount(bool Display_Error) {
if (Is_Mounted()) {
int never_unmount_system;
DataManager::GetValue(TW_DONT_UNMOUNT_SYSTEM, never_unmount_system);
if (never_unmount_system == 1 && Mount_Point == PartitionManager.Get_Android_Root_Path())
return true; // Never unmount system if you're not supposed to unmount it
if (Is_Storage && MTP_Storage_ID > 0)
PartitionManager.Remove_MTP_Storage(MTP_Storage_ID);
if (!Symlink_Mount_Point.empty())
umount(Symlink_Mount_Point.c_str());
umount(Mount_Point.c_str());
if (Is_Mounted()) {
if (Display_Error)
gui_msg(Msg(msg::kError, "fail_unmount=Failed to unmount '{1}' ({2})")(Mount_Point)(strerror(errno)));
else
LOGINFO("Unable to unmount '%s'\n", Mount_Point.c_str());
return false;
} else {
return true;
}
} else {
return true;
}
}
bool TWPartition::ReMount(bool Display_Error) {
if (UnMount(Display_Error))
return Mount(Display_Error);
return false;
}
bool TWPartition::ReMount_RW(bool Display_Error) {
// No need to remount if already mounted rw
if (Is_File_System_Writable())
return true;
bool ro = Mount_Read_Only;
int flags = Mount_Flags;
Mount_Read_Only = false;
Mount_Flags &= ~MS_RDONLY;
bool ret = ReMount(Display_Error);
Mount_Read_Only = ro;
Mount_Flags = flags;
return ret;
}
bool TWPartition::BlkDiscard() {
string cmd;
LOGINFO("Perform BLKDISCARD on block device %s\n", Actual_Block_Device.c_str());
cmd = "/system/bin/toybox blkdiscard " + Actual_Block_Device;
return (TWFunc::Exec_Cmd(cmd) == 0);
}
bool TWPartition::Wipe(string New_File_System) {
bool wiped = false, update_crypt = false, recreate_media = true;
int check;
if (!Can_Be_Wiped) {
gui_msg(Msg(msg::kError, "cannot_wipe=Partition {1} cannot be wiped.")(Display_Name));
return false;
}
if (Mount_Point == "/cache")
Log_Offset = 0;
if (Mount_Point == PartitionManager.Get_Android_Root_Path()) {
if (tw_get_default_metadata(PartitionManager.Get_Android_Root_Path().c_str()) != 0) {
gui_msg(Msg(msg::kWarning, "restore_system_context=Unable to get default context for {1} -- Android may not boot.")(PartitionManager.Get_Android_Root_Path()));
}
}
if (Has_Data_Media && Current_File_System == New_File_System) {
wiped = Wipe_Data_Without_Wiping_Media();
if (Mount_Point == "/data" && TWFunc::get_log_dir() == DATA_LOGS_DIR) {
bool created = PartitionManager.Recreate_Logs_Dir();
if (!created)
LOGERR("Unable to create log directory for TWRP\n");
}
recreate_media = false;
} else {
DataManager::GetValue(TW_RM_RF_VAR, check);
if (check || Use_Rm_Rf)
wiped = Wipe_RMRF();
else if (New_File_System == "ext4")
wiped = Wipe_EXT4();
else if (New_File_System == "ext2" || New_File_System == "ext3")
wiped = Wipe_EXTFS(New_File_System);
else if (New_File_System == "exfat")
wiped = Wipe_EXFAT();
else if (New_File_System == "ntfs" || Current_File_System == "tntfs")
wiped = Wipe_NTFS();
else if (New_File_System == "yaffs2")
wiped = Wipe_MTD();
else if (New_File_System == "f2fs")
wiped = Wipe_F2FS();
else if (New_File_System == "vfat")
wiped = Wipe_FAT();
else {
LOGERR("Unable to wipe '%s' -- unknown file system '%s'\n", Mount_Point.c_str(), New_File_System.c_str());
return false;
}
update_crypt = wiped;
update_crypt = false;
}
if (wiped) {
if (Mount_Point == "/cache" && TWFunc::get_log_dir() != DATA_LOGS_DIR)
DataManager::Output_Version();
if (Mount_Point == PartitionManager.Get_Android_Root_Path()) {
tw_set_default_metadata(PartitionManager.Get_Android_Root_Path().c_str());
}
if (update_crypt) {
Setup_File_System(false);
if (Is_Encrypted && !Is_Decrypted) {
// just wiped an encrypted partition back to its unencrypted state
Is_Encrypted = false;
Is_Decrypted = false;
Decrypted_Block_Device = "";
if (Mount_Point == "/data") {
DataManager::SetValue(TW_IS_ENCRYPTED, 0);
DataManager::SetValue(TW_IS_DECRYPTED, 0);
}
}
}
if (Is_Storage && Mount(false) && !Is_FBE)
PartitionManager.Add_MTP_Storage(MTP_Storage_ID);
}
return wiped;
}
bool TWPartition::Wipe() {
if (Is_File_System(Current_File_System))
return Wipe(Current_File_System);
else
return Wipe(Fstab_File_System);
}
bool TWPartition::Wipe_AndSec(void) {
if (!Has_Android_Secure)
return false;
if (!Mount(true))
return false;
gui_msg(Msg("wiping=Wiping {1}")(Backup_Display_Name));
TWFunc::removeDir(Mount_Point + "/.android_secure/", true);
return true;
}
bool TWPartition::Wipe_Data_Cache(void) {
if (!Mount(true))
return false;
gui_msg(Msg("wiping=Wiping {1}")(Mount_Point + "/cache/"));
TWFunc::removeDir(Mount_Point + "/cache/", true);
return true;
}
bool TWPartition::Can_Repair() {
if (Mount_Read_Only)
return false;
if (Current_File_System == "vfat" && TWFunc::Path_Exists("/system/bin/fsck.fat"))
return true;
else if ((Current_File_System == "ext2" || Current_File_System == "ext3" || Current_File_System == "ext4") && TWFunc::Path_Exists("/system/bin/e2fsck"))
return true;
else if (Current_File_System == "exfat" && TWFunc::Path_Exists("/system/bin/fsck.exfat"))
return true;
else if (Current_File_System == "f2fs" && TWFunc::Path_Exists("/system/bin/fsck.f2fs"))
return true;
else if ((Current_File_System == "ntfs" || Current_File_System == "tntfs") && (TWFunc::Path_Exists("/system/bin/ntfsfix") || TWFunc::Path_Exists("/system/bin/fsck.ntfs")))
return true;
return false;
}
bool TWPartition::Repair() {
string command;
if (Current_File_System == "vfat") {
if (!TWFunc::Path_Exists("/system/bin/fsck.fat")) {
gui_msg(Msg(msg::kError, "repair_not_exist={1} does not exist! Cannot repair!")("fsck.fat"));
return false;
}
if (!UnMount(true))
return false;
gui_msg(Msg("repairing_using=Repairing {1} using {2}...")(Display_Name)("fsck.fat"));
Find_Actual_Block_Device();
command = "/system/bin/fsck.fat -y " + Actual_Block_Device;
LOGINFO("Repair command: %s\n", command.c_str());
if (TWFunc::Exec_Cmd(command) == 0) {
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_repair=Unable to repair {1}.")(Display_Name));
return false;
}
}
if (Current_File_System == "ext2" || Current_File_System == "ext3" || Current_File_System == "ext4") {
if (!TWFunc::Path_Exists("/system/bin/e2fsck")) {
gui_msg(Msg(msg::kError, "repair_not_exist={1} does not exist! Cannot repair!")("e2fsck"));
return false;
}
if (!UnMount(true))
return false;
gui_msg(Msg("repairing_using=Repairing {1} using {2}...")(Display_Name)("e2fsck"));
Find_Actual_Block_Device();
command = "/system/bin/e2fsck -fp " + Actual_Block_Device;
LOGINFO("Repair command: %s\n", command.c_str());
if (TWFunc::Exec_Cmd(command) == 0) {
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_repair=Unable to repair {1}.")(Display_Name));
return false;
}
}
if (Current_File_System == "exfat") {
if (!TWFunc::Path_Exists("/system/bin/fsck.exfat")) {
gui_msg(Msg(msg::kError, "repair_not_exist={1} does not exist! Cannot repair!")("fsck.exfat"));
return false;
}
if (!UnMount(true))
return false;
gui_msg(Msg("repairing_using=Repairing {1} using {2}...")(Display_Name)("fsck.exfat"));
Find_Actual_Block_Device();
command = "/system/bin/fsck.exfat " + Actual_Block_Device;
LOGINFO("Repair command: %s\n", command.c_str());
if (TWFunc::Exec_Cmd(command) == 0) {
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_repair=Unable to repair {1}.")(Display_Name));
return false;
}
}
if (Current_File_System == "f2fs") {
if (!TWFunc::Path_Exists("/system/bin/fsck.f2fs")) {
gui_msg(Msg(msg::kError, "repair_not_exist={1} does not exist! Cannot repair!")("fsck.f2fs"));
return false;
}
if (!UnMount(true))
return false;
gui_msg(Msg("repairing_using=Repairing {1} using {2}...")(Display_Name)("fsck.f2fs"));
Find_Actual_Block_Device();
command = "/system/bin/fsck.f2fs " + Actual_Block_Device;
LOGINFO("Repair command: %s\n", command.c_str());
if (TWFunc::Exec_Cmd(command) == 0) {
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_repair=Unable to repair {1}.")(Display_Name));
return false;
}
}
if (Current_File_System == "ntfs" || Current_File_System == "tntfs") {
string Ntfsfix_Binary;
if (TWFunc::Path_Exists("/system/bin/ntfsfix"))
Ntfsfix_Binary = "ntfsfix";
else if (TWFunc::Path_Exists("/system/bin/fsck.ntfs"))
Ntfsfix_Binary = "fsck.ntfs";
else {
gui_msg(Msg(msg::kError, "repair_not_exist={1} does not exist! Cannot repair!")("ntfsfix"));
return false;
}
if (!UnMount(true))
return false;
gui_msg(Msg("repairing_using=Repairing {1} using {2}...")(Display_Name)(Ntfsfix_Binary));
Find_Actual_Block_Device();
command = "/system/bin/" + Ntfsfix_Binary + " " + Actual_Block_Device;
LOGINFO("Repair command: %s\n", command.c_str());
if (TWFunc::Exec_Cmd(command) == 0) {
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_repair=Unable to repair {1}.")(Display_Name));
return false;
}
}
return false;
}
bool TWPartition::Can_Resize() {
if (Mount_Read_Only)
return false;
if ((Current_File_System == "ext2" || Current_File_System == "ext3" || Current_File_System == "ext4") && TWFunc::Path_Exists("/system/bin/resize2fs"))
return true;
return false;
}
bool TWPartition::Resize() {
string command;
if (Current_File_System == "ext2" || Current_File_System == "ext3" || Current_File_System == "ext4") {
if (!Can_Repair()) {
LOGINFO("Cannot resize %s because %s cannot be repaired before resizing.\n", Display_Name.c_str(), Display_Name.c_str());
gui_msg(Msg(msg::kError, "cannot_resize=Cannot resize {1}.")(Display_Name));
return false;
}
if (!TWFunc::Path_Exists("/system/bin/resize2fs")) {
LOGINFO("resize2fs does not exist! Cannot resize!\n");
gui_msg(Msg(msg::kError, "cannot_resize=Cannot resize {1}.")(Display_Name));
return false;
}
// Repair will unmount so no need to do it twice
gui_msg(Msg("repair_resize=Repairing {1} before resizing.")( Display_Name));
if (!Repair())
return false;
gui_msg(Msg("resizing=Resizing {1} using {2}...")(Display_Name)("resize2fs"));
Find_Actual_Block_Device();
command = "/system/bin/resize2fs " + Actual_Block_Device;
if (Length != 0) {
unsigned long long Actual_Size = IOCTL_Get_Block_Size();
if (Actual_Size == 0)
return false;
unsigned long long Block_Count;
if (Length < 0) {
// Reduce overall size by this length
Block_Count = (Actual_Size / 1024LLU) - ((unsigned long long)(Length * -1) / 1024LLU);
} else {
// This is the size, not a size reduction
Block_Count = ((unsigned long long)(Length) / 1024LLU);
}
char temp[256];
sprintf(temp, "%llu", Block_Count);
command += " ";
command += temp;
command += "K";
}
LOGINFO("Resize command: %s\n", command.c_str());
if (TWFunc::Exec_Cmd(command) == 0) {
Update_Size(true);
gui_msg("done=Done.");
return true;
} else {
Update_Size(true);
gui_msg(Msg(msg::kError, "unable_resize=Unable to resize {1}.")(Display_Name));
return false;
}
}
return false;
}
bool TWPartition::Backup(PartitionSettings *part_settings, pid_t *tar_fork_pid) {
if (Backup_Method == BM_FILES)
return Backup_Tar(part_settings, tar_fork_pid);
else if (Backup_Method == BM_DD)
return Backup_Image(part_settings);
else if (Backup_Method == BM_FLASH_UTILS)
return Backup_Dump_Image(part_settings);
LOGERR("Unknown backup method for '%s'\n", Mount_Point.c_str());
return false;
}
bool TWPartition::Restore(PartitionSettings *part_settings) {
TWFunc::GUI_Operation_Text(TW_RESTORE_TEXT, Display_Name, gui_parse_text("{@restoring_hdr}"));
LOGINFO("Restore filename is: %s/%s\n", part_settings->Backup_Folder.c_str(), Backup_FileName.c_str());
string Restore_File_System = Get_Restore_File_System(part_settings);
if (Is_File_System(Restore_File_System))
return Restore_Tar(part_settings);
else if (Is_Image(Restore_File_System))
return Restore_Image(part_settings);
LOGERR("Unknown restore method for '%s'\n", Mount_Point.c_str());
return false;
}
string TWPartition::Get_Restore_File_System(PartitionSettings *part_settings) {
size_t first_period, second_period;
string Restore_File_System;
// Parse backup filename to extract the file system before wiping
first_period = Backup_FileName.find(".");
if (first_period == string::npos) {
LOGERR("Unable to find file system (first period).\n");
return string();
}
Restore_File_System = Backup_FileName.substr(first_period + 1, Backup_FileName.size() - first_period - 1);
second_period = Restore_File_System.find(".");
if (second_period == string::npos) {
LOGERR("Unable to find file system (second period).\n");
return string();
}
Restore_File_System.resize(second_period);
LOGINFO("Restore file system is: '%s'.\n", Restore_File_System.c_str());
return Restore_File_System;
}
string TWPartition::Backup_Method_By_Name() {
if (Backup_Method == BM_NONE)
return "none";
else if (Backup_Method == BM_FILES)
return "files";
else if (Backup_Method == BM_DD)
return "dd";
else if (Backup_Method == BM_FLASH_UTILS)
return "flash_utils";
else
return "undefined";
return "ERROR!";
}
bool TWPartition::Decrypt(string Password) {
LOGINFO("STUB TWPartition::Decrypt, password: '%s'\n", Password.c_str());
// Is this needed?
return 1;
}
bool TWPartition::Wipe_Encryption() {
bool Save_Data_Media = Has_Data_Media;
bool ret = false;
BasePartition* base_partition = make_partition();
if (!base_partition->PreWipeEncryption())
goto exit;
Find_Actual_Block_Device();
if (!Is_Present) {
LOGINFO("Block device not present, cannot format %s.\n", Display_Name.c_str());
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
#ifdef TW_INCLUDE_CRYPTO
if (!UnMount(true))
return false;
if (Is_Decrypted && !Decrypted_Block_Device.empty()) {
if (delete_crypto_blk_dev((char*)("userdata")) != 0) {
LOGERR("Error deleting crypto block device, continuing anyway.\n");
}
}
#endif
Has_Data_Media = false;
Decrypted_Block_Device = "";
Is_Decrypted = false;
Is_Encrypted = false;
if (Wipe(Fstab_File_System)) {
Has_Data_Media = Save_Data_Media;
DataManager::SetValue(TW_IS_ENCRYPTED, 0);
#ifndef TW_OEM_BUILD
gui_msg("format_data_msg=You may need to reboot recovery to be able to use /data again.");
#endif
if (Is_FBE) {
gui_msg(Msg(msg::kWarning, "data_media_fbe_msg=TWRP will not recreate /data/media on an FBE device. Please reboot into your rom to create /data/media."));
} else {
if (Has_Data_Media && !Symlink_Mount_Point.empty()) {
if (Mount(false))
PartitionManager.Add_MTP_Storage(MTP_Storage_ID);
}
}
ret = true;
if (!Key_Directory.empty())
ret = PartitionManager.Wipe_By_Path(Key_Directory);
if (ret)
ret = base_partition->PostWipeEncryption();
goto exit;
} else {
Has_Data_Media = Save_Data_Media;
gui_err("format_data_err=Unable to format to remove encryption.");
if (Has_Data_Media && Mount(false))
PartitionManager.Add_MTP_Storage(MTP_Storage_ID);
goto exit;
}
exit:
delete base_partition;
return ret;
}
void TWPartition::Check_FS_Type() {
const char* type;
blkid_probe pr;
if (Fstab_File_System == "yaffs2" || Fstab_File_System == "mtd" || Fstab_File_System == "bml" || Ignore_Blkid)
return; // Running blkid on some mtd devices causes a massive crash or needs to be skipped
Find_Actual_Block_Device();
if (!Is_Present)
return;
pr = blkid_new_probe_from_filename(Actual_Block_Device.c_str());
if (blkid_do_fullprobe(pr)) {
blkid_free_probe(pr);
LOGINFO("Can't probe device %s\n", Actual_Block_Device.c_str());
return;
}
if (blkid_probe_lookup_value(pr, "TYPE", &type, NULL) < 0) {
blkid_free_probe(pr);
LOGINFO("can't find filesystem on device %s\n", Actual_Block_Device.c_str());
return;
}
Current_File_System = type;
blkid_free_probe(pr);
if (fs_flags.size() > 1) {
std::vector<partition_fs_flags_struct>::iterator iter;
std::vector<partition_fs_flags_struct>::iterator found = fs_flags.begin();
for (iter = fs_flags.begin(); iter != fs_flags.end(); iter++) {
if (iter->File_System == Current_File_System) {
found = iter;
break;
}
}
// If we don't find a match, we default the flags to the first set of flags that we received from the fstab
if (Mount_Flags != found->Mount_Flags || Mount_Options != found->Mount_Options) {
Mount_Flags = found->Mount_Flags;
Mount_Options = found->Mount_Options;
LOGINFO("Mount_Flags: %i, Mount_Options: %s\n", Mount_Flags, Mount_Options.c_str());
}
}
}
bool TWPartition::Wipe_EXTFS(string File_System) {
if (!UnMount(true))
return false;
#if PLATFORM_SDK_VERSION < 28
if (!TWFunc::Path_Exists("/system/bin/mke2fs"))
#else
if (!TWFunc::Path_Exists("/system/bin/mke2fs") || !TWFunc::Path_Exists("/system/bin/e2fsdroid"))
#endif
return Wipe_RMRF();
int ret;
bool NeedPreserveFooter = true;
Find_Actual_Block_Device();
if (!Is_Present) {
LOGINFO("Block device not present, cannot wipe %s.\n", Display_Name.c_str());
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
/**
* On decrypted devices, IOCTL_Get_Block_Size calculates size on device mapper,
* so there's no need to preserve footer.
*/
if ((Is_Decrypted && !Decrypted_Block_Device.empty()) ||
Crypto_Key_Location != "footer") {
NeedPreserveFooter = false;
}
unsigned long long dev_sz = TWFunc::IOCTL_Get_Block_Size(Actual_Block_Device.c_str());
if (!dev_sz)
return false;
if (NeedPreserveFooter)
Length < 0 ? dev_sz += Length : dev_sz -= CRYPT_FOOTER_OFFSET;
char dout[16];
sprintf(dout, "%llu", dev_sz / 4096);
//string size_str =to_string(dev_sz / 4096);
string size_str = dout;
string Command;
gui_msg(Msg("formatting_using=Formatting {1} using {2}...")(Display_Name)("mke2fs"));
// Execute mke2fs to create empty ext4 filesystem
Command = "mke2fs -t " + File_System + " -b 4096 " + Actual_Block_Device + " " + size_str;
LOGINFO("mke2fs command: %s\n", Command.c_str());
ret = TWFunc::Exec_Cmd(Command);
if (ret) {
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
if (TWFunc::Path_Exists("/system/bin/e2fsdroid")) {
const string& File_Contexts_Entry = (Mount_Point == "/system_root" ? "/" : Mount_Point);
char *secontext = NULL;
if (!selinux_handle || selabel_lookup(selinux_handle, &secontext, File_Contexts_Entry.c_str(), S_IFDIR) < 0) {
LOGINFO("Cannot lookup security context for '%s'\n", Mount_Point.c_str());
} else {
// Execute e2fsdroid to initialize selinux context
if (Mount_Point == "/persist") {
Mount(true);
TWFunc::removeDir("/persist/lost+found", false);
UnMount(true);
}
Command = "e2fsdroid -e -S /file_contexts -a " + File_Contexts_Entry + " " + Actual_Block_Device;
LOGINFO("e2fsdroid command: %s\n", Command.c_str());
ret = TWFunc::Exec_Cmd(Command);
if (ret) {
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
}
} else {
LOGINFO("e2fsdroid not present\n");
}
if (NeedPreserveFooter)
Wipe_Crypto_Key();
Current_File_System = File_System;
Recreate_AndSec_Folder();
gui_msg("done=Done.");
return true;
}
bool TWPartition::Wipe_EXT4() {
#ifdef USE_EXT4
int ret;
bool NeedPreserveFooter = true;
if (!UnMount(true))
return false;
Find_Actual_Block_Device();
if (!Is_Present) {
LOGINFO("Block device not present, cannot wipe %s.\n", Display_Name.c_str());
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
/**
* On decrypted devices, IOCTL_Get_Block_Size calculates size on device mapper,
* so there's no need to preserve footer.
*/
if ((Is_Decrypted && !Decrypted_Block_Device.empty()) ||
Crypto_Key_Location != "footer") {
NeedPreserveFooter = false;
}
unsigned long long dev_sz = TWFunc::IOCTL_Get_Block_Size(Actual_Block_Device.c_str());
if (!dev_sz)
return false;
if (NeedPreserveFooter)
Length < 0 ? dev_sz += Length : dev_sz -= CRYPT_FOOTER_OFFSET;
char *secontext = NULL;
gui_msg(Msg("formatting_using=Formatting {1} using {2}...")(Display_Name)("make_ext4fs"));
if (!selinux_handle || selabel_lookup(selinux_handle, &secontext, Mount_Point.c_str(), S_IFDIR) < 0) {
LOGINFO("Cannot lookup security context for '%s'\n", Mount_Point.c_str());
ret = make_ext4fs(Actual_Block_Device.c_str(), dev_sz, Mount_Point.c_str(), NULL);
} else {
ret = make_ext4fs(Actual_Block_Device.c_str(), dev_sz, Mount_Point.c_str(), selinux_handle);
}
if (ret != 0) {
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
} else {
if (NeedPreserveFooter)
Wipe_Crypto_Key();
string sedir = Mount_Point + "/lost+found";
PartitionManager.Mount_By_Path(sedir.c_str(), true);
rmdir(sedir.c_str());
mkdir(sedir.c_str(), S_IRWXU | S_IRWXG | S_IWGRP | S_IXGRP);
return true;
}
#else
return Wipe_EXTFS("ext4");
#endif
}
bool TWPartition::Wipe_FAT() {
string command;
if (!UnMount(true))
return false;
if (TWFunc::Path_Exists("/system/bin/mkfs.fat")) {
gui_msg(Msg("formatting_using=Formatting {1} using {2}...")(Display_Name)("mkfs.fat"));
Find_Actual_Block_Device();
command = "mkfs.fat " + Actual_Block_Device;
if (TWFunc::Exec_Cmd(command) == 0) {
Current_File_System = "vfat";
Recreate_AndSec_Folder();
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
return true;
}
else
return Wipe_RMRF();
return false;
}
bool TWPartition::Wipe_EXFAT() {
string command;
if (!UnMount(true))
return false;
if (TWFunc::Path_Exists("/system/bin/mkexfatfs")) {
gui_msg(Msg("formatting_using=Formatting {1} using {2}...")(Display_Name)("mkexfatfs"));
Find_Actual_Block_Device();
command = "mkexfatfs " + Actual_Block_Device;
if (TWFunc::Exec_Cmd(command) == 0) {
Recreate_AndSec_Folder();
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
return true;
}
return false;
}
bool TWPartition::Wipe_MTD() {
if (!UnMount(true))
return false;
gui_msg(Msg("formatting_using=Formatting {1} using {2}...")(Display_Name)("MTD"));
mtd_scan_partitions();
const MtdPartition* mtd = mtd_find_partition_by_name(MTD_Name.c_str());
if (mtd == NULL) {
LOGERR("No mtd partition named '%s'", MTD_Name.c_str());
return false;
}
MtdWriteContext* ctx = mtd_write_partition(mtd);
if (ctx == NULL) {
LOGERR("Can't write '%s', failed to format.", MTD_Name.c_str());
return false;
}
if (mtd_erase_blocks(ctx, -1) == -1) {
mtd_write_close(ctx);
LOGERR("Failed to format '%s'", MTD_Name.c_str());
return false;
}
if (mtd_write_close(ctx) != 0) {
LOGERR("Failed to close '%s'", MTD_Name.c_str());
return false;
}
Current_File_System = "yaffs2";
Recreate_AndSec_Folder();
gui_msg("done=Done.");
return true;
}
bool TWPartition::Wipe_RMRF() {
if (!Mount(true))
return false;
// This is the only wipe that leaves the partition mounted, so we
// must manually remove the partition from MTP if it is a storage
// partition.
if (Is_Storage)
PartitionManager.Remove_MTP_Storage(MTP_Storage_ID);
gui_msg(Msg("remove_all=Removing all files under '{1}'")(Mount_Point));
TWFunc::removeDir(Mount_Point, true);
Recreate_AndSec_Folder();
return true;
}
bool TWPartition::Wipe_F2FS() {
std::string f2fs_command;
if (!UnMount(true))
return false;
if (TWFunc::Path_Exists("/system/bin/mkfs.f2fs"))
f2fs_command = "/system/bin/mkfs.f2fs";
else if (TWFunc::Path_Exists("/system/bin/make_f2fs"))
f2fs_command = "/system/bin/make_f2fs -g android";
else {
LOGINFO("mkfs.f2fs binary not found, using rm -rf to wipe.\n");
return Wipe_RMRF();
}
bool NeedPreserveFooter = true;
bool needs_casefold = false;
bool needs_projid = false;
Find_Actual_Block_Device();
if (!Is_Present) {
LOGINFO("Block device not present, cannot wipe %s.\n", Display_Name.c_str());
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
needs_casefold = android::base::GetBoolProperty("external_storage.casefold.enabled", false);
needs_projid = android::base::GetBoolProperty("external_storage.projid.enabled", false);
unsigned long long dev_sz = TWFunc::IOCTL_Get_Block_Size(Actual_Block_Device.c_str());
if (!dev_sz)
return false;
if (NeedPreserveFooter)
Length < 0 ? dev_sz += Length : dev_sz -= CRYPT_FOOTER_OFFSET;
char dev_sz_str[48];
sprintf(dev_sz_str, "%llu", (dev_sz / 4096));
if(needs_projid)
f2fs_command += " -O project_quota,extra_attr";
if(needs_casefold)
f2fs_command += " -O casefold -C utf8";
if (Needs_Fs_Compress)
f2fs_command += " -O compression,extra_attr";
f2fs_command += " " + Actual_Block_Device + " " + dev_sz_str;
if (TWFunc::Path_Exists("/system/bin/sload_f2fs")) {
f2fs_command += " && sload_f2fs -t /data " + Actual_Block_Device;
}
/**
* On decrypted devices, IOCTL_Get_Block_Size calculates size on device mapper,
* so there's no need to preserve footer.
*/
if ((Is_Decrypted && !Decrypted_Block_Device.empty()) ||
Crypto_Key_Location != "footer") {
NeedPreserveFooter = false;
}
LOGINFO("mkfs.f2fs command: %s\n", f2fs_command.c_str());
if (TWFunc::Exec_Cmd(f2fs_command) == 0) {
if (NeedPreserveFooter)
Wipe_Crypto_Key();
Recreate_AndSec_Folder();
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
return true;
}
bool TWPartition::Wipe_NTFS() {
string command;
string Ntfsmake_Binary;
if (!UnMount(true))
return false;
if (TWFunc::Path_Exists("/system/bin/mkntfs"))
Ntfsmake_Binary = "mkntfs";
else if (TWFunc::Path_Exists("/system/bin/mkfs.ntfs"))
Ntfsmake_Binary = "mkfs.ntfs";
else
return false;
gui_msg(Msg("formatting_using=Formatting {1} using {2}...")(Display_Name)(Ntfsmake_Binary));
Find_Actual_Block_Device();
command = "/system/bin/" + Ntfsmake_Binary + " " + Actual_Block_Device;
if (TWFunc::Exec_Cmd(command) == 0) {
Recreate_AndSec_Folder();
gui_msg("done=Done.");
return true;
} else {
gui_msg(Msg(msg::kError, "unable_to_wipe=Unable to wipe {1}.")(Display_Name));
return false;
}
return false;
}
bool TWPartition::Wipe_Data_Without_Wiping_Media() {
#ifdef TW_OEM_BUILD
// In an OEM Build we want to do a full format
return Wipe_Encryption();
#else
bool ret = false;
if (!Mount(true))
return false;
gui_msg("wiping_data=Wiping data without wiping /data/media ...");
ret = Wipe_Data_Without_Wiping_Media_Func(Mount_Point + "/");
if (ret)
gui_msg("done=Done.");
return ret;
#endif // ifdef TW_OEM_BUILD
}
bool TWPartition::Wipe_Data_Without_Wiping_Media_Func(const string& parent __unused) {
string dir;
DIR* d;
d = opendir(parent.c_str());
if (d != NULL) {
struct dirent* de;
while ((de = readdir(d)) != NULL) {
if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0) continue;
dir = parent;
dir.append(de->d_name);
if (wipe_exclusions.check_skip_dirs(dir)) {
LOGINFO("skipped '%s'\n", dir.c_str());
continue;
}
if (de->d_type == DT_DIR) {
dir.append("/");
if (!Wipe_Data_Without_Wiping_Media_Func(dir)) {
closedir(d);
return false;
}
rmdir(dir.c_str());
} else if (de->d_type == DT_REG || de->d_type == DT_LNK || de->d_type == DT_FIFO || de->d_type == DT_SOCK) {
if (unlink(dir.c_str()) != 0)
LOGINFO("Unable to unlink '%s': %s\n", dir.c_str(), strerror(errno));
}
}
closedir(d);
return true;
}
gui_msg(Msg(msg::kError, "error_opening_strerr=Error opening: '{1}' ({2})")(Mount_Point)(strerror(errno)));
return false;
}
void TWPartition::Wipe_Crypto_Key() {
Find_Actual_Block_Device();
if (Crypto_Key_Location.empty())
return;
else if (Crypto_Key_Location == "footer") {
int fd = open(Actual_Block_Device.c_str(), O_RDWR);
if (fd < 0) {
gui_print_color("warning", "Unable to open '%s' to wipe crypto key\n", Actual_Block_Device.c_str());
return;
}
unsigned int block_count;
if ((ioctl(fd, BLKGETSIZE, &block_count)) == -1) {
gui_print_color("warning", "Unable to get block size for wiping crypto footer.\n");
} else {
int newlen = Length < 0 ? -Length : CRYPT_FOOTER_OFFSET;
off64_t offset = ((off64_t)block_count * 512) - newlen;
if (lseek64(fd, offset, SEEK_SET) == -1) {
gui_print_color("warning", "Unable to lseek64 for wiping crypto footer.\n");
} else {
void* buffer = malloc(newlen);
if (!buffer) {
gui_print_color("warning", "Failed to malloc for wiping crypto footer.\n");
} else {
memset(buffer, 0, newlen);
int ret = write(fd, buffer, newlen);
if (ret != newlen) {
gui_print_color("warning", "Failed to wipe crypto footer.\n");
} else {
LOGINFO("Successfully wiped crypto footer.\n");
}
free(buffer);
}
}
}
close(fd);
} else {
if (TWFunc::IOCTL_Get_Block_Size(Crypto_Key_Location.c_str()) >= 16384LLU) {
string Command = "dd of='" + Crypto_Key_Location + "' if=/dev/zero bs=16384 count=1";
TWFunc::Exec_Cmd(Command);
} else {
LOGINFO("Crypto key location reports size < 16K so not wiping crypto footer.\n");
}
}
}
bool TWPartition::Backup_Tar(PartitionSettings *part_settings, pid_t *tar_fork_pid) {
string Full_FileName;
twrpTar tar;
if (!Mount(true))
return false;
TWFunc::GUI_Operation_Text(TW_BACKUP_TEXT, Backup_Display_Name, gui_parse_text("{@backing}"));
gui_msg(Msg("backing_up=Backing up {1}...")(Backup_Display_Name));
DataManager::GetValue(TW_USE_COMPRESSION_VAR, tar.use_compression);
#ifndef TW_EXCLUDE_ENCRYPTED_BACKUPS
if (Can_Encrypt_Backup) {
DataManager::GetValue("tw_encrypt_backup", tar.use_encryption);
if (tar.use_encryption) {
if (Use_Userdata_Encryption)
tar.userdata_encryption = tar.use_encryption;
string Password;
DataManager::GetValue("tw_backup_password", Password);
tar.setpassword(Password);
} else {
tar.use_encryption = 0;
}
}
#endif
Backup_FileName = Backup_Name + "." + Current_File_System + ".win";
Full_FileName = part_settings->Backup_Folder + "/" + Backup_FileName;
if (Has_Data_Media)
gui_msg(Msg(msg::kWarning, "backup_storage_warning=Backups of {1} do not include any files in internal storage such as pictures or downloads.")(Display_Name));
if (Mount_Point == "/data" && DataManager::GetIntValue(TW_IS_FBE)) {
std::vector<users_struct>::iterator iter;
std::vector<users_struct>* userList = PartitionManager.Get_Users_List();
for (iter = userList->begin(); iter