diff options
Diffstat (limited to '')
| -rw-r--r-- | bootloader_message/bootloader_message.cpp (renamed from uncrypt/bootloader_message_writer.cpp) | 82 | ||||
| -rw-r--r-- | uncrypt/Android.mk | 11 | ||||
| -rw-r--r-- | uncrypt/include/bootloader_message_writer.h | 35 | ||||
| -rw-r--r-- | uncrypt/uncrypt.cpp | 21 |
4 files changed, 98 insertions, 51 deletions
diff --git a/uncrypt/bootloader_message_writer.cpp b/bootloader_message/bootloader_message.cpp index 3bb106aa0..9de7dff40 100644 --- a/uncrypt/bootloader_message_writer.cpp +++ b/bootloader_message/bootloader_message.cpp @@ -14,6 +14,8 @@ * limitations under the License. */ +#include <bootloader_message/bootloader_message.h> + #include <errno.h> #include <fcntl.h> #include <string.h> @@ -27,8 +29,6 @@ #include <android-base/unique_fd.h> #include <fs_mgr.h> -#include "bootloader.h" - static struct fstab* read_fstab(std::string* err) { // The fstab path is always "/fstab.${ro.hardware}". std::string fstab_path = "/fstab."; @@ -58,7 +58,57 @@ static std::string get_misc_blk_device(std::string* err) { return record->blk_device; } -static bool write_bootloader_message(const bootloader_message& boot, std::string* err) { +// In recovery mode, recovery can get started and try to access the misc +// device before the kernel has actually created it. +static bool wait_for_device(const std::string& blk_device, std::string* err) { + int tries = 0; + int ret; + err->clear(); + do { + ++tries; + struct stat buf; + ret = stat(blk_device.c_str(), &buf); + if (ret == -1) { + *err += android::base::StringPrintf("failed to stat %s try %d: %s\n", + blk_device.c_str(), tries, strerror(errno)); + sleep(1); + } + } while (ret && tries < 10); + + if (ret) { + *err += android::base::StringPrintf("failed to stat %s\n", blk_device.c_str()); + } + return ret == 0; +} + +static bool read_misc_partition(void* p, size_t size, size_t offset, std::string* err) { + std::string misc_blk_device = get_misc_blk_device(err); + if (misc_blk_device.empty()) { + return false; + } + if (!wait_for_device(misc_blk_device, err)) { + return false; + } + android::base::unique_fd fd(open(misc_blk_device.c_str(), O_RDONLY)); + if (fd.get() == -1) { + *err = android::base::StringPrintf("failed to open %s: %s", misc_blk_device.c_str(), + strerror(errno)); + return false; + } + if (lseek(fd.get(), static_cast<off_t>(offset), SEEK_SET) != static_cast<off_t>(offset)) { + *err = android::base::StringPrintf("failed to lseek %s: %s", misc_blk_device.c_str(), + strerror(errno)); + return false; + } + if (!android::base::ReadFully(fd.get(), p, size)) { + *err = android::base::StringPrintf("failed to read %s: %s", misc_blk_device.c_str(), + strerror(errno)); + return false; + } + return true; +} + +static bool write_misc_partition(const void* p, size_t size, size_t offset, std::string* err) { std::string misc_blk_device = get_misc_blk_device(err); if (misc_blk_device.empty()) { return false; @@ -69,11 +119,17 @@ static bool write_bootloader_message(const bootloader_message& boot, std::string strerror(errno)); return false; } - if (!android::base::WriteFully(fd.get(), &boot, sizeof(boot))) { + if (lseek(fd.get(), static_cast<off_t>(offset), SEEK_SET) != static_cast<off_t>(offset)) { + *err = android::base::StringPrintf("failed to lseek %s: %s", misc_blk_device.c_str(), + strerror(errno)); + return false; + } + if (!android::base::WriteFully(fd.get(), p, size)) { *err = android::base::StringPrintf("failed to write %s: %s", misc_blk_device.c_str(), strerror(errno)); return false; } + // TODO: O_SYNC and fsync duplicates each other? if (fsync(fd.get()) == -1) { *err = android::base::StringPrintf("failed to fsync %s: %s", misc_blk_device.c_str(), @@ -83,6 +139,14 @@ static bool write_bootloader_message(const bootloader_message& boot, std::string return true; } +bool read_bootloader_message(bootloader_message* boot, std::string* err) { + return read_misc_partition(boot, sizeof(*boot), BOOTLOADER_MESSAGE_OFFSET_IN_MISC, err); +} + +bool write_bootloader_message(const bootloader_message& boot, std::string* err) { + return write_misc_partition(&boot, sizeof(boot), BOOTLOADER_MESSAGE_OFFSET_IN_MISC, err); +} + bool clear_bootloader_message(std::string* err) { bootloader_message boot = {}; return write_bootloader_message(boot, err); @@ -101,6 +165,16 @@ bool write_bootloader_message(const std::vector<std::string>& options, std::stri return write_bootloader_message(boot, err); } +bool read_wipe_package(std::string* package_data, size_t size, std::string* err) { + package_data->resize(size); + return read_misc_partition(&(*package_data)[0], size, WIPE_PACKAGE_OFFSET_IN_MISC, err); +} + +bool write_wipe_package(const std::string& package_data, std::string* err) { + return write_misc_partition(package_data.data(), package_data.size(), + WIPE_PACKAGE_OFFSET_IN_MISC, err); +} + extern "C" bool write_bootloader_message(const char* options) { std::string err; return write_bootloader_message({options}, &err); diff --git a/uncrypt/Android.mk b/uncrypt/Android.mk index 09cfdfca5..bb276edd5 100644 --- a/uncrypt/Android.mk +++ b/uncrypt/Android.mk @@ -15,15 +15,6 @@ LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) -LOCAL_CLANG := true -LOCAL_SRC_FILES := bootloader_message_writer.cpp -LOCAL_MODULE := libbootloader_message_writer -LOCAL_STATIC_LIBRARIES := libbase libfs_mgr -LOCAL_C_INCLUDES := $(LOCAL_PATH)/.. -LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include -include $(BUILD_STATIC_LIBRARY) - -include $(CLEAR_VARS) LOCAL_CLANG := true @@ -33,7 +24,7 @@ LOCAL_C_INCLUDES := $(LOCAL_PATH)/.. LOCAL_MODULE := uncrypt -LOCAL_STATIC_LIBRARIES := libbootloader_message_writer libbase \ +LOCAL_STATIC_LIBRARIES := libbootloader_message libbase \ liblog libfs_mgr libcutils \ LOCAL_INIT_RC := uncrypt.rc diff --git a/uncrypt/include/bootloader_message_writer.h b/uncrypt/include/bootloader_message_writer.h deleted file mode 100644 index e0ca3f44a..000000000 --- a/uncrypt/include/bootloader_message_writer.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * Copyright (C) 2016 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. - */ - -#ifndef BOOTLOADER_MESSAGE_WRITER_H -#define BOOTLOADER_MESSAGE_WRITER_H - -#ifdef __cplusplus -#include <string> -#include <vector> - -bool clear_bootloader_message(std::string* err); - -bool write_bootloader_message(const std::vector<std::string>& options, std::string* err); - -#else -#include <stdbool.h> - -// C Interface. -bool write_bootloader_message(const char* options); -#endif - -#endif // BOOTLOADER_MESSAGE_WRITER_H diff --git a/uncrypt/uncrypt.cpp b/uncrypt/uncrypt.cpp index 7adf88cac..b7867edc5 100644 --- a/uncrypt/uncrypt.cpp +++ b/uncrypt/uncrypt.cpp @@ -110,7 +110,7 @@ #include <android-base/stringprintf.h> #include <android-base/strings.h> #include <android-base/unique_fd.h> -#include <bootloader_message_writer.h> +#include <bootloader_message/bootloader_message.h> #include <cutils/android_reboot.h> #include <cutils/properties.h> #include <cutils/sockets.h> @@ -498,14 +498,31 @@ static bool setup_bcb(const int socket) { return false; } LOG(INFO) << " received command: [" << content << "] (" << content.size() << ")"; + std::vector<std::string> options = android::base::Split(content, "\n"); + std::string wipe_package; + for (auto& option : options) { + if (android::base::StartsWith(option, "--wipe_package=")) { + std::string path = option.substr(strlen("--wipe_package=")); + if (!android::base::ReadFileToString(path, &wipe_package)) { + PLOG(ERROR) << "failed to read " << path; + return false; + } + option = android::base::StringPrintf("--wipe_package_size=%zu", wipe_package.size()); + } + } // c8. setup the bcb command std::string err; - if (!write_bootloader_message({content}, &err)) { + if (!write_bootloader_message(options, &err)) { LOG(ERROR) << "failed to set bootloader message: " << err; write_status_to_socket(-1, socket); return false; } + if (!wipe_package.empty() && !write_wipe_package(wipe_package, &err)) { + PLOG(ERROR) << "failed to set wipe package: " << err; + write_status_to_socket(-1, socket); + return false; + } // c10. send "100" status write_status_to_socket(100, socket); return true; |