From 2f272c0551f984e83bc5abaf240e0dddb38a3326 Mon Sep 17 00:00:00 2001 From: Yabin Cui Date: Fri, 24 Jun 2016 18:22:02 -0700 Subject: Create bootloader_message static library. bootloader_messages merges bootloader_message_writer and bootloader.cpp, so we can use the same library to manage bootloader_message in normal boot and recovery mode. Bug: 29582118 Change-Id: I9efdf776ef8f02b53911ff43a518e035e0c29618 --- bootloader.cpp | 235 --------------------------------------------------------- 1 file changed, 235 deletions(-) delete mode 100644 bootloader.cpp (limited to 'bootloader.cpp') diff --git a/bootloader.cpp b/bootloader.cpp deleted file mode 100644 index f6c0e9341..000000000 --- a/bootloader.cpp +++ /dev/null @@ -1,235 +0,0 @@ -/* - * 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 -#include -#include -#include -#include -#include -#include -#include - -#include - -#include - -#include "bootloader.h" -#include "common.h" -#include "mtdutils/mtdutils.h" -#include "roots.h" -#include "unique_fd.h" - -static int get_bootloader_message_mtd(bootloader_message* out, const Volume* v); -static int set_bootloader_message_mtd(const bootloader_message* in, const Volume* v); -static bool read_misc_partition(const Volume* v, size_t offset, size_t size, std::string* out); -static bool write_misc_partition(const Volume* v, size_t offset, const std::string& in); - -int get_bootloader_message(bootloader_message* out) { - Volume* v = volume_for_path("/misc"); - if (v == nullptr) { - LOGE("Cannot load volume /misc!\n"); - return -1; - } - if (strcmp(v->fs_type, "mtd") == 0) { - return get_bootloader_message_mtd(out, v); - } else if (strcmp(v->fs_type, "emmc") == 0) { - std::string s; - if (!read_misc_partition(v, BOOTLOADER_MESSAGE_OFFSET_IN_MISC, sizeof(bootloader_message), - &s)) { - return -1; - } - memcpy(out, s.data(), s.size()); - return 0; - } - LOGE("Unknown misc partition fs_type \"%s\"\n", v->fs_type); - return -1; -} - -bool read_wipe_package(size_t size, std::string* out) { - Volume* v = volume_for_path("/misc"); - if (v == nullptr) { - LOGE("Cannot load volume /misc!\n"); - return false; - } - if (strcmp(v->fs_type, "mtd") == 0) { - LOGE("Read wipe package on mtd is not supported.\n"); - return false; - } else if (strcmp(v->fs_type, "emmc") == 0) { - return read_misc_partition(v, WIPE_PACKAGE_OFFSET_IN_MISC, size, out); - } - LOGE("Unknown misc partition fs_type \"%s\"\n", v->fs_type); - return false; -} - -int set_bootloader_message(const bootloader_message* in) { - Volume* v = volume_for_path("/misc"); - if (v == nullptr) { - LOGE("Cannot load volume /misc!\n"); - return -1; - } - if (strcmp(v->fs_type, "mtd") == 0) { - return set_bootloader_message_mtd(in, v); - } else if (strcmp(v->fs_type, "emmc") == 0) { - std::string s(reinterpret_cast(in), sizeof(*in)); - bool success = write_misc_partition(v, BOOTLOADER_MESSAGE_OFFSET_IN_MISC, s); - return success ? 0 : -1; - } - LOGE("Unknown misc partition fs_type \"%s\"\n", v->fs_type); - 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(bootloader_message* out, - const Volume* v) { - size_t write_size; - mtd_scan_partitions(); - const MtdPartition* part = mtd_find_partition_by_name(v->blk_device); - if (part == nullptr || mtd_partition_info(part, nullptr, nullptr, &write_size)) { - LOGE("failed to find \"%s\"\n", v->blk_device); - return -1; - } - - MtdReadContext* read = mtd_read_partition(part); - if (read == nullptr) { - LOGE("failed to open \"%s\": %s\n", v->blk_device, 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("failed to read \"%s\": %s\n", v->blk_device, 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 bootloader_message* in, - const Volume* v) { - size_t write_size; - mtd_scan_partitions(); - const MtdPartition* part = mtd_find_partition_by_name(v->blk_device); - if (part == nullptr || mtd_partition_info(part, nullptr, nullptr, &write_size)) { - LOGE("failed to find \"%s\"\n", v->blk_device); - return -1; - } - - MtdReadContext* read = mtd_read_partition(part); - if (read == nullptr) { - LOGE("failed to open \"%s\": %s\n", v->blk_device, 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("failed to read \"%s\": %s\n", v->blk_device, 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 == nullptr) { - LOGE("failed to open \"%s\": %s\n", v->blk_device, strerror(errno)); - return -1; - } - if (mtd_write_data(write, data, size) != size) { - LOGE("failed to write \"%s\": %s\n", v->blk_device, strerror(errno)); - mtd_write_close(write); - return -1; - } - if (mtd_write_close(write)) { - LOGE("failed to finish \"%s\": %s\n", v->blk_device, 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; - do { - ++tries; - struct stat buf; - ret = stat(fn, &buf); - if (ret == -1) { - printf("failed to 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 bool read_misc_partition(const Volume* v, size_t offset, size_t size, std::string* out) { - wait_for_device(v->blk_device); - unique_fd fd(open(v->blk_device, O_RDONLY)); - if (fd.get() == -1) { - LOGE("Failed to open \"%s\": %s\n", v->blk_device, strerror(errno)); - return false; - } - if (lseek(fd.get(), static_cast(offset), SEEK_SET) != static_cast(offset)) { - LOGE("Failed to lseek \"%s\": %s\n", v->blk_device, strerror(errno)); - return false; - } - out->resize(size); - if (!android::base::ReadFully(fd.get(), &(*out)[0], size)) { - LOGE("Failed to read \"%s\": %s\n", v->blk_device, strerror(errno)); - return false; - } - return true; -} - -static bool write_misc_partition(const Volume* v, size_t offset, const std::string& in) { - wait_for_device(v->blk_device); - unique_fd fd(open(v->blk_device, O_WRONLY | O_SYNC)); - if (fd.get() == -1) { - LOGE("Failed to open \"%s\": %s\n", v->blk_device, strerror(errno)); - return false; - } - if (lseek(fd.get(), static_cast(offset), SEEK_SET) != static_cast(offset)) { - LOGE("Failed to lseek \"%s\": %s\n", v->blk_device, strerror(errno)); - return false; - } - if (!android::base::WriteFully(fd.get(), in.data(), in.size())) { - LOGE("Failed to write \"%s\": %s\n", v->blk_device, strerror(errno)); - return false; - } - - if (fsync(fd.get()) == -1) { - LOGE("Failed to fsync \"%s\": %s\n", v->blk_device, strerror(errno)); - return false; - } - return true; -} -- cgit v1.2.3