612161ef1c
[1] added a new API isSlotMarkedSuccessful() to actually query if a given slot has been marked as successful. [1]: commit 72c88c915d957bf2eba73950e7f0407b220d1ef4 Change-Id: I9155c9b9233882a295a9a6e607a844d9125e4c56
81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* This program verifies the integrity of the partitions after an A/B OTA
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* update. It gets invoked by init, and will only perform the verification if
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* it's the first boot post an A/B OTA update.
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*
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* It relies on dm-verity to capture any corruption on the partitions being
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* verified. dm-verity must be in enforcing mode, so that it will reboot the
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* device on dm-verity failures. When that happens, the bootloader should
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* mark the slot as unbootable and stops trying. We should never see a device
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* started in dm-verity logging mode but with isSlotMarkedSuccessful equals to
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* 0.
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*
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* The current slot will be marked as having booted successfully if the
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* verifier reaches the end after the verification.
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*
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* TODO: The actual verification part will be added later after we have the
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* A/B OTA package format in place.
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*/
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#include <string.h>
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#include <hardware/boot_control.h>
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#define LOG_TAG "update_verifier"
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#include <log/log.h>
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int main(int argc, char** argv) {
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for (int i = 1; i < argc; i++) {
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SLOGI("Started with arg %d: %s\n", i, argv[i]);
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}
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const hw_module_t* hw_module;
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if (hw_get_module("bootctrl", &hw_module) != 0) {
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SLOGE("Error getting bootctrl module.\n");
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return -1;
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}
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boot_control_module_t* module = reinterpret_cast<boot_control_module_t*>(
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const_cast<hw_module_t*>(hw_module));
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module->init(module);
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unsigned current_slot = module->getCurrentSlot(module);
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int is_successful= module->isSlotMarkedSuccessful(module, current_slot);
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SLOGI("Booting slot %u: isSlotMarkedSuccessful=%d\n", current_slot, is_successful);
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if (is_successful == 0) {
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// The current slot has not booted successfully.
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// TODO: Add the actual verification after we have the A/B OTA package
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// format in place.
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// TODO: Assert the dm-verity mode. Bootloader should never boot a newly
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// flashed slot (isSlotMarkedSuccessful == 0) with dm-verity logging mode.
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int ret = module->markBootSuccessful(module);
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if (ret != 0) {
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SLOGE("Error marking booted successfully: %s\n", strerror(-ret));
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return -1;
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}
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SLOGI("Marked slot %u as booted successfully.\n", current_slot);
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}
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SLOGI("Leaving update_verifier.\n");
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return 0;
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}
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