diff options
author | Tianjie Xu <xunchang@google.com> | 2018-09-21 07:54:57 +0200 |
---|---|---|
committer | android-build-merger <android-build-merger@google.com> | 2018-09-21 07:54:57 +0200 |
commit | 4c65ab54c1211362ce5f135be804d22866603b3f (patch) | |
tree | 953295f16c621146f623963000f345f9307814af /update_verifier/include/update_verifier/update_verifier.h | |
parent | Merge "Move the parse of last_install to recovery-persist" (diff) | |
parent | Merge "Refactor update_verifier into a class" (diff) | |
download | android_bootable_recovery-4c65ab54c1211362ce5f135be804d22866603b3f.tar android_bootable_recovery-4c65ab54c1211362ce5f135be804d22866603b3f.tar.gz android_bootable_recovery-4c65ab54c1211362ce5f135be804d22866603b3f.tar.bz2 android_bootable_recovery-4c65ab54c1211362ce5f135be804d22866603b3f.tar.lz android_bootable_recovery-4c65ab54c1211362ce5f135be804d22866603b3f.tar.xz android_bootable_recovery-4c65ab54c1211362ce5f135be804d22866603b3f.tar.zst android_bootable_recovery-4c65ab54c1211362ce5f135be804d22866603b3f.zip |
Diffstat (limited to 'update_verifier/include/update_verifier/update_verifier.h')
-rw-r--r-- | update_verifier/include/update_verifier/update_verifier.h | 42 |
1 files changed, 35 insertions, 7 deletions
diff --git a/update_verifier/include/update_verifier/update_verifier.h b/update_verifier/include/update_verifier/update_verifier.h index 534384e1d..bdfabed0c 100644 --- a/update_verifier/include/update_verifier/update_verifier.h +++ b/update_verifier/include/update_verifier/update_verifier.h @@ -16,17 +16,45 @@ #pragma once +#include <map> #include <string> +#include <vector> -int update_verifier(int argc, char** argv); +#include "otautil/rangeset.h" + +// The update verifier performs verification upon the first boot to a new slot on A/B devices. +// During the verification, it reads all the blocks in the care_map. And if a failure happens, +// it rejects the current boot and triggers a fallback. -// Returns true to indicate a passing verification (or the error should be ignored); Otherwise -// returns false on fatal errors, where we should reject the current boot and trigger a fallback. -// This function tries to process the care_map.txt as protobuf message; and falls back to use the -// plain text format if the parse failed. -// // Note that update_verifier should be backward compatible to not reject care_map.txt from old // releases, which could otherwise fail to boot into the new release. For example, we've changed // the care_map format between N and O. An O update_verifier would fail to work with N care_map.txt. // This could be a result of sideloading an O OTA while the device having a pending N update. -bool verify_image(const std::string& care_map_name); +int update_verifier(int argc, char** argv); + +// The UpdateVerifier parses the content in the care map, and continues to verify the +// partitions by reading the cared blocks if there's no format error in the file. Otherwise, +// it should skip the verification to avoid bricking the device. +class UpdateVerifier { + public: + // This function tries to process the care_map.pb as protobuf message; and falls back to use + // care_map.txt if the pb format file doesn't exist. If the parsing succeeds, put the result of + // the pair <partition_name, ranges> into the |partition_map_|. + bool ParseCareMap(const std::string& file_name = ""); + + // Verifies the new boot by reading all the cared blocks for partitions in |partition_map_|. + bool VerifyPartitions(); + + private: + // Parses the legacy care_map.txt in plain text format. + bool ParseCareMapPlainText(const std::string& content); + + // Finds all the dm-enabled partitions, and returns a map of <partition_name, block_device>. + std::map<std::string, std::string> FindDmPartitions(); + + // Returns true if we successfully read the blocks in |ranges| of the |dm_block_device|. + bool ReadBlocks(const std::string partition_name, const std::string& dm_block_device, + const RangeSet& ranges); + + std::map<std::string, RangeSet> partition_map_; +}; |