/* Partition Management classes for TWRP
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* The code was written from scratch by Dees_Troy dees_troy at
* yahoo
*
* Copyright (c) 2012
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/vfs.h>
#include <unistd.h>
#include <vector>
#include "variables.h"
#include "common.h"
#include "partitions.hpp"
#include "data.hpp"
#ifdef TW_INCLUDE_CRYPTO
#ifdef TW_INCLUDE_JB_CRYPTO
#include "crypto/jb/cryptfs.h"
#else
#include "crypto/ics/cryptfs.h"
#endif
#include "cutils/properties.h"
#endif
int TWPartitionManager::Process_Fstab(string Fstab_Filename, bool Display_Error) {
FILE *fstabFile;
char fstab_line[MAX_FSTAB_LINE_LENGTH];
fstabFile = fopen(Fstab_Filename.c_str(), "rt");
if (fstabFile == NULL) {
LOGE("Critical Error: Unable to open fstab at '%s'.\n", Fstab_Filename.c_str());
return false;
}
while (fgets(fstab_line, sizeof(fstab_line), fstabFile) != NULL) {
if (fstab_line[0] != '/')
continue;
TWPartition* partition = new TWPartition();
string line(fstab_line);
if (partition->Process_Fstab_Line(line, Display_Error)) {
Partitions.push_back(partition);
} else {
delete partition;
}
}
fclose(fstabFile);
if (!Write_Fstab()) {
if (Display_Error)
LOGE("Error creating fstab\n");
else
LOGI("Error creating fstab\n");
}
Update_System_Details();
return true;
}
int TWPartitionManager::Write_Fstab(void) {
FILE *fp;
std::vector<TWPartition*>::iterator iter;
string Line;
fp = fopen("/etc/fstab", "w");
if (fp == NULL) {
LOGI("Can not open /etc/fstab.\n");
return false;
}
for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
if ((*iter)->Can_Be_Mounted) {
if ((*iter)->Is_Decrypted)
Line = (*iter)->Decrypted_Block_Device + " " + (*iter)->Mount_Point + " " + (*iter)->Current_File_System + " rw\n";
else
Line = (*iter)->Block_Device + " " + (*iter)->Mount_Point + " " + (*iter)->Current_File_System + " rw\n";
fputs(Line.c_str(), fp);
// Handle subpartition tracking
if ((*iter)->Is_SubPartition) {
TWPartition* ParentPartition = Find_Partition_By_Path((*iter)->SubPartition_Of);
if (ParentPartition)
ParentPartition->Has_SubPartition = true;
else
LOGE("Unable to locate parent partition '%s' of '%s'\n", (*iter)->SubPartition_Of.c_str(), (*iter)->Mount_Point.c_str());
}
}
}
fclose(fp);
return true;
}
int TWPartitionManager::Mount_By_Path(string Path, bool Display_Error) {
std::vector<TWPartition*>::iterator iter;
int ret = false;
bool found = false;
string Local_Path = Get_Root_Path(Path);
// Iterate through all partitions
for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
if ((*iter)->Mount_Point == Local_Path) {
ret = (*iter)->Mount(Display_Error);
found = true;
} else if ((*iter)->Is_SubPartition && (*iter)->SubPartition_Of == Local_Path) {
(*iter)->Mount(Display_Error);
}
}
if (found) {
return ret;
} else if (Display_Error) {
LOGE("Mount: Unable to find partition for path '%s'\n", Local_Path.c_str());
} else {
LOGI("Mount: Unable to find partition for path '%s'\n", Local_Path.c_str());
}
return false;
}
int TWPartitionManager::Mount_By_Block(string Block, bool Display_Error) {
TWPartition* Part = Find_Partition_By_Block(Block);
if (Part) {
if (Part->Has_SubPartition) {
std::vector<TWPartition*>::iterator subpart;
for (subpart = Partitions.begin(); subpart != Partitions.end(); subpart++) {
if ((*subpart)->Is_SubPartition && (*subpart)->SubPartition_Of == Part->Mount_Point)
(*subpart)->Mount(Display_Error);
}
return Part->Mount(Display_Error);
} else
return Part->Mount(Display_Error);
}
if (Display_Error)
LOGE("Mount: Unable to find partition for block '%s'\n", Block.c_str());
else
LOGI("Mount: Unable to find partition for block '%s'\n", Block.c_str());
return false;
}
int TWPartitionManager::Mount_By_Name(string Name, bool Display_Error) {
TWPartition* Part = Find_Partition_By_Name(Name);
if (Part) {
if (Part->Has_SubPartition) {
std::vector<TWPartition*>::iterator subpart;
for (subpart = Partitions.begin(); subpart != Partitions.end(); subpart++) {
if ((*subpart)->Is_SubPartition && (*subpart)->SubPartition_Of == Part->Mount_Point)
(*subpart)->Mount(Display_Error);
}
return Part->Mount(Display_Error);
} else
return Part->Mount(Display_Error);
}
if (Display_Error)
LOGE("Mount: Unable to find partition for name '%s'\n", Name.c_str());
else
LOGI("Mount: Unable to find partition for name '%s'\n", Name.c_str());
return false;
}
int TWPartitionManager::UnMount_By_Path(string Path, bool Display_Error) {
std::vector<TWPartition*>::iterator iter;
int ret = false;
bool found = false;
string Local_Path = Get_Root_Path(Path);
// Iterate through all partitions
for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
if ((*iter)->Mount_Point == Local_Path) {
ret = (*iter)->UnMount(Display_Error);
found = true;
} else if ((*iter)->Is_SubPartition && (*iter)->SubPartition_Of == Local_Path) {
(*iter)->UnMount(Display_Error);
}
}
if (found) {
return ret;
} else if (Display_Error) {
LOGE("UnMount: Unable to find partition for path '%s'\n", Local_Path.c_str());
} else {
LOGI("UnMount: Unable to find partition for path '%s'\n", Local_Path.c_str());
}
return false;
}
int TWPartitionManager::UnMount_By_Block(string Block, bool Display_Error) {
TWPartition* Part = Find_Partition_By_Block(Block);
if (Part) {
if (Part->Has_SubPartition) {
std::vector<TWPartition*>::iterator subpart;
for (subpart = Partitions.begin(); subpart != Partitions.end(); subpart++) {
if ((*subpart)->Is_SubPartition && (*subpart)->SubPartition_Of == Part->Mount_Point)
(*subpart)->UnMount(Display_Error);
}
return Part->UnMount(Display_Error);
} else
return Part->UnMount(Display_Error);
}
if (Display_Error)
LOGE("UnMount: Unable to find partition for block '%s'\n", Block.c_str());
else
LOGI("UnMount: Unable to find partition for block '%s'\n", Block.c_str());
return false;
}
int TWPartitionManager::UnMount_By_Name(string Name, bool Display_Error) {
TWPartition* Part = Find_Partition_By_Name(Name);
if (Part) {
if (Part->Has_SubPartition) {
std::vector<TWPartition*>::iterator subpart;
for (subpart = Partitions.begin(); subpart != Partitions.end(); subpart++) {
if ((*subpart)->Is_SubPartition && (*subpart)->SubPartition_Of == Part->Mount_Point)
(*subpart)->UnMount(Display_Error);
}
return Part->UnMount(Display_Error);
} else
return Part->UnMount(Display_Error);
}
if (Display_Error)
LOGE("UnMount: Unable to find partition for name '%s'\n", Name.c_str());
else
LOGI("UnMount: Unable to find partition for name '%s'\n", Name.c_str());
return false;
}
int TWPartitionManager::Is_Mounted_By_Path(string Path) {
TWPartition* Part = Find_Partition_By_Path(Path);
if (Part)
return Part->Is_Mounted();
else
LOGI("Is_Mounted: Unable to find partition for path '%s'\n", Path.c_str());
return false;
}
int TWPartitionManager::Is_Mounted_By_Block(string Block) {
TWPartition* Part = Find_Partition_By_Block(Block);
if (Part)
return Part->Is_Mounted();
else
LOGI("Is_Mounted: Unable to find partition for block '%s'\n", Block.c_str());
return false;
}
int TWPartitionManager::Is_Mounted_By_Name(string Name) {
TWPartition* Part = Find_Partition_By_Name(Name);
if (Part)
return Part->Is_Mounted();
else
LOGI("Is_Mounted: Unable to find partition for name '%s'\n", Name.c_str());
return false;
}
int TWPartitionManager::Mount_Current_Storage(bool Display_Error) {
string current_storage_path = DataManager::GetCurrentStoragePath();
if (Mount_By_Path(current_storage_path, Display_Error)) {
TWPartition* FreeStorage = Find_Partition_By_Path(current_storage_path);
if (FreeStorage)
DataManager::SetValue(TW_STORAGE_FREE_SIZE, (int)(FreeStorage->Free / 1048576LLU));
return true;
}
return false;
}
int TWPartitionManager::Mount_Settings_Storage(bool Display_Error) {
return Mount_By_Path(DataManager::GetSettingsStoragePath(), Display_Error);
}
TWPartition* TWPartitionManager::Find_Partition_By_Path(string Path) {
std::vector<TWPartition*>::iterator iter;
string Local_Path = Get_Root_Path(Path);
for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
if ((*iter)->Mount_Point == Local_Path)
return (*iter);
}
return NULL;
}
TWPartition* TWPartitionManager::Find_Partition_By_Block(string Block) {
std::vector<TWPartition*>::iterator iter;
for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
if ((*iter)->Block_Device == Block || (*iter)->Alternate_Block_Device == Block || ((*iter)->Is_Decrypted && (*iter)->Decrypted_Block_Device == Block))
return (*iter);
}
return NULL;
}
TWPartition* TWPartitionManager::Find_Partition_By_Name(string Name) {
std::vector<TWPartition*>::iterator iter;
for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
if ((*iter)->Display_Name == Name)
return (*iter);
}
return NULL;
}
int TWPartitionManager::Run_Backup(string Backup_Name) {
LOGI("STUB TWPartitionManager::Run_Backup, Backup_Name: '%s'\n", Backup_Name.c_str());
return 1;
}
int TWPartitionManager::Run_Restore(string Restore_Name) {
LOGI("STUB TWPartitionManager::Run_Restore, Restore_Name: '%s'\n", Restore_Name.c_str());
return 1;
}
void TWPartitionManager::Set_Restore_Files(string Restore_Name) {
LOGI("STUB TWPartitionManager::Set_Restore_Files\n");
return;
}
int TWPartitionManager::Wipe_By_Path(string Path) {
LOGI("STUB TWPartitionManager::Wipe_By_Path, Path: '%s'\n", Path.c_str());
return 1;
}
int TWPartitionManager::Wipe_By_Block(string Block) {
LOGI("STUB TWPartitionManager::Wipe_By_Block, Block: '%s'\n", Block.c_str());
return 1;
}
int TWPartitionManager::Wipe_By_Name(string Name) {
LOGI("STUB TWPartitionManager::Wipe_By_Name, Name: '%s'\n", Name.c_str());
return 1;
}
int TWPartitionManager::Factory_Reset(void) {
LOGI("STUB TWPartitionManager::Factory_Reset\n");
return 1;
}
void TWPartitionManager::Refresh_Sizes(void) {
Update_System_Details();
return;
}
void TWPartitionManager::Update_System_Details(void) {
std::vector<TWPartition*>::iterator iter;
int data_size = 0;
LOGI("Updating system details...\n");
for (iter = Partitions.begin(); iter != Partitions.end(); iter++) {
if ((*iter)->Can_Be_Mounted) {
(*iter)->Update_Size(true);
if ((*iter)->Mount_Point == "/system") {
int backup_display_size = (int)((*iter)->Backup_Size / 1048576LLU);
DataManager::SetValue(TW_BACKUP_SYSTEM_SIZE, backup_display_size);
} else if ((*iter)->Mount_Point == "/data" || (*iter)->Mount_Point == "/datadata") {
data_size += (int)((*iter)->Backup_Size / 1048576LLU);
} else if ((*iter)->Mount_Point == "/cache") {
int backup_display_size = (int)((*iter)->Backup_Size / 1048576LLU);
DataManager::SetValue(TW_BACKUP_CACHE_SIZE, backup_display_size);
} else if ((*iter)->Mount_Point == "/sd-ext") {
int backup_display_size = (int)((*iter)->Backup_Size / 1048576LLU);
DataManager::SetValue(TW_BACKUP_SDEXT_SIZE, backup_display_size);
if ((*iter)->Backup_Size == 0) {
DataManager::SetValue(TW_HAS_SDEXT_PARTITION, 0);
DataManager::SetValue(TW_BACKUP_SDEXT_VAR, 0);
} else
DataManager::SetValue(TW_HAS_SDEXT_PARTITION, 1);
}
}
}
DataManager::SetValue(TW_BACKUP_DATA_SIZE, data_size);
string current_storage_path = DataManager::GetCurrentStoragePath();
TWPartition* FreeStorage = Find_Partition_By_Path(current_storage_path);
if (FreeStorage)
DataManager::SetValue(TW_STORAGE_FREE_SIZE, (int)(FreeStorage->Free / 1048576LLU));
else
LOGI("Unable to find storage partition '%s'.\n", current_storage_path.c_str());
if (!Write_Fstab())
LOGE("Error creating fstab\n");
return;
}
int TWPartitionManager::Decrypt_Device(string Password) {
#ifdef TW_INCLUDE_CRYPTO
int ret_val, password_len;
char crypto_blkdev[255], cPassword[255];
size_t result;
property_set("ro.crypto.state", "encrypted");
#ifdef TW_INCLUDE_JB_CRYPTO
// No extra flags needed
#else
property_set("ro.crypto.fs_type", CRYPTO_FS_TYPE);
property_set("ro.crypto.fs_real_blkdev", CRYPTO_REAL_BLKDEV);
property_set("ro.crypto.fs_mnt_point", CRYPTO_MNT_POINT);
property_set("ro.crypto.fs_options", CRYPTO_FS_OPTIONS);
property_set("ro.crypto.fs_flags", CRYPTO_FS_FLAGS);
property_set("ro.crypto.keyfile.userdata", CRYPTO_KEY_LOC);
#endif
strcpy(cPassword, Password.c_str());
if (cryptfs_check_passwd(cPassword) != 0) {
LOGE("Failed to decrypt data.\n");
return -1;
}
property_get("ro.crypto.fs_crypto_blkdev", crypto_blkdev, "error");
if (strcmp(crypto_blkdev, "error") == 0) {
LOGE("Error retrieving decrypted data block device.\n");
} else {
TWPartition* dat = Find_Partition_By_Path("/data");
if (dat != NULL) {
DataManager::SetValue(TW_DATA_BLK_DEVICE, dat->Block_Device);
DataManager::SetValue(TW_IS_DECRYPTED, 1);
dat->Is_Decrypted = true;
dat->Decrypted_Block_Device = crypto_blkdev;
LOGI("Data successfully decrypted, new block device: '%s'\n", crypto_blkdev);
// Sleep for a bit so that the device will be ready
sleep(1);
Update_System_Details();
} else
LOGE("Unable to locate data partition.\n");
}
return 0;
#else
LOGE("No crypto support was compiled into this build.\n");
return -1;
#endif
return 1;
}
string TWPartitionManager::Get_Root_Path(string Path) {
string Local_Path = Path;
// Make sure that we have a leading slash
if (Local_Path.substr(0, 1) != "/")
Local_Path = "/" + Local_Path;
// Trim the path to get the root path only
size_t position = Local_Path.find("/", 2);
if (position != string::npos) {
Local_Path.resize(position);
}
return Local_Path;
}