Add backup size checking
Converted bootloader.cpp to TWRP and removed AOSP fstab parsing from startup
This commit is contained in:
Dees_Troy
204
twbootloader.cpp
Normal file
204
twbootloader.cpp
Normal file
@@ -0,0 +1,204 @@
|
||||
/*
|
||||
* Copyright (C) 2008 The Android Open Source Project
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
#include "bootloader.h"
|
||||
#include "common.h"
|
||||
extern "C" {
|
||||
#include "mtdutils/mtdutils.h"
|
||||
}
|
||||
|
||||
#include <errno.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <sys/stat.h>
|
||||
#include <unistd.h>
|
||||
#include "partitions.hpp"
|
||||
|
||||
static int get_bootloader_message_mtd(struct bootloader_message *out, const TWPartition* Partition);
|
||||
static int set_bootloader_message_mtd(const struct bootloader_message *in, const TWPartition* Partition);
|
||||
static int get_bootloader_message_block(struct bootloader_message *out, const TWPartition* Partition);
|
||||
static int set_bootloader_message_block(const struct bootloader_message *in, const TWPartition* Partition);
|
||||
|
||||
int get_bootloader_message(struct bootloader_message *out) {
|
||||
TWPartition* Part = PartitionManager.Find_Partition_By_Path("/misc");
|
||||
if (Part == NULL) {
|
||||
//LOGE("Cannot load volume /misc!\n");
|
||||
return -1;
|
||||
}
|
||||
if (Part->Current_File_System == "mtd") {
|
||||
return get_bootloader_message_mtd(out, Part);
|
||||
} else if (Part->Current_File_System == "emmc") {
|
||||
return get_bootloader_message_block(out, Part);
|
||||
}
|
||||
LOGE("unknown misc partition fs_type \"%s\"\n", Part->Current_File_System.c_str());
|
||||
return -1;
|
||||
}
|
||||
|
||||
int set_bootloader_message(const struct bootloader_message *in) {
|
||||
TWPartition* Part = PartitionManager.Find_Partition_By_Path("/misc");
|
||||
if (Part == NULL) {
|
||||
//LOGE("Cannot load volume /misc!\n");
|
||||
return -1;
|
||||
}
|
||||
if (Part->Current_File_System == "mtd") {
|
||||
return set_bootloader_message_mtd(in, Part);
|
||||
} else if (Part->Current_File_System == "emmc") {
|
||||
return set_bootloader_message_block(in, Part);
|
||||
}
|
||||
LOGE("unknown misc partition fs_type \"%s\"\n", Part->Current_File_System.c_str());
|
||||
return -1;
|
||||
}
|
||||
|
||||
// ------------------------------
|
||||
// for misc partitions on MTD
|
||||
// ------------------------------
|
||||
|
||||
static const int MISC_PAGES = 3; // number of pages to save
|
||||
static const int MISC_COMMAND_PAGE = 1; // bootloader command is this page
|
||||
|
||||
static int get_bootloader_message_mtd(struct bootloader_message *out,
|
||||
const TWPartition* Partition) {
|
||||
size_t write_size;
|
||||
mtd_scan_partitions();
|
||||
const MtdPartition *part = mtd_find_partition_by_name(Partition->Actual_Block_Device.c_str());
|
||||
if (part == NULL || mtd_partition_info(part, NULL, NULL, &write_size)) {
|
||||
LOGE("Can't find %s\n", Partition->Actual_Block_Device.c_str());
|
||||
return -1;
|
||||
}
|
||||
|
||||
MtdReadContext *read = mtd_read_partition(part);
|
||||
if (read == NULL) {
|
||||
LOGE("Can't open %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
const ssize_t size = write_size * MISC_PAGES;
|
||||
char data[size];
|
||||
ssize_t r = mtd_read_data(read, data, size);
|
||||
if (r != size) LOGE("Can't read %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
mtd_read_close(read);
|
||||
if (r != size) return -1;
|
||||
|
||||
memcpy(out, &data[write_size * MISC_COMMAND_PAGE], sizeof(*out));
|
||||
return 0;
|
||||
}
|
||||
static int set_bootloader_message_mtd(const struct bootloader_message *in,
|
||||
const TWPartition* Partition) {
|
||||
size_t write_size;
|
||||
mtd_scan_partitions();
|
||||
const MtdPartition *part = mtd_find_partition_by_name(Partition->Actual_Block_Device.c_str());
|
||||
if (part == NULL || mtd_partition_info(part, NULL, NULL, &write_size)) {
|
||||
LOGE("Can't find %s\n", Partition->Actual_Block_Device.c_str());
|
||||
return -1;
|
||||
}
|
||||
|
||||
MtdReadContext *read = mtd_read_partition(part);
|
||||
if (read == NULL) {
|
||||
LOGE("Can't open %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
ssize_t size = write_size * MISC_PAGES;
|
||||
char data[size];
|
||||
ssize_t r = mtd_read_data(read, data, size);
|
||||
if (r != size) LOGE("Can't read %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
mtd_read_close(read);
|
||||
if (r != size) return -1;
|
||||
|
||||
memcpy(&data[write_size * MISC_COMMAND_PAGE], in, sizeof(*in));
|
||||
|
||||
MtdWriteContext *write = mtd_write_partition(part);
|
||||
if (write == NULL) {
|
||||
LOGE("Can't open %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
if (mtd_write_data(write, data, size) != size) {
|
||||
LOGE("Can't write %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
mtd_write_close(write);
|
||||
return -1;
|
||||
}
|
||||
if (mtd_write_close(write)) {
|
||||
LOGE("Can't finish %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
LOGI("Set boot command \"%s\"\n", in->command[0] != 255 ? in->command : "");
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
// ------------------------------------
|
||||
// for misc partitions on block devices
|
||||
// ------------------------------------
|
||||
|
||||
static void wait_for_device(const char* fn) {
|
||||
int tries = 0;
|
||||
int ret;
|
||||
struct stat buf;
|
||||
do {
|
||||
++tries;
|
||||
ret = stat(fn, &buf);
|
||||
if (ret) {
|
||||
printf("stat %s try %d: %s\n", fn, tries, strerror(errno));
|
||||
sleep(1);
|
||||
}
|
||||
} while (ret && tries < 10);
|
||||
if (ret) {
|
||||
printf("failed to stat %s\n", fn);
|
||||
}
|
||||
}
|
||||
|
||||
static int get_bootloader_message_block(struct bootloader_message *out,
|
||||
const TWPartition* Partition) {
|
||||
wait_for_device(Partition->Actual_Block_Device.c_str());
|
||||
FILE* f = fopen(Partition->Actual_Block_Device.c_str(), "rb");
|
||||
if (f == NULL) {
|
||||
LOGE("Can't open %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
struct bootloader_message temp;
|
||||
int count = fread(&temp, sizeof(temp), 1, f);
|
||||
if (count != 1) {
|
||||
LOGE("Failed reading %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
if (fclose(f) != 0) {
|
||||
LOGE("Failed closing %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
memcpy(out, &temp, sizeof(temp));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int set_bootloader_message_block(const struct bootloader_message *in,
|
||||
const TWPartition* Partition) {
|
||||
wait_for_device(Partition->Actual_Block_Device.c_str());
|
||||
FILE* f = fopen(Partition->Actual_Block_Device.c_str(), "wb");
|
||||
if (f == NULL) {
|
||||
LOGE("Can't open %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
int count = fwrite(in, sizeof(*in), 1, f);
|
||||
if (count != 1) {
|
||||
LOGE("Failed writing %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
if (fclose(f) != 0) {
|
||||
LOGE("Failed closing %s\n(%s)\n", Partition->Actual_Block_Device.c_str(), strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user