diff options
Diffstat (limited to 'update_verifier/include')
-rw-r--r-- | update_verifier/include/update_verifier/update_verifier.h | 53 |
1 files changed, 46 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..4c64b1ea1 100644 --- a/update_verifier/include/update_verifier/update_verifier.h +++ b/update_verifier/include/update_verifier/update_verifier.h @@ -16,17 +16,56 @@ #pragma once +#include <functional> +#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: + UpdateVerifier(); + + // 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(); + + // Verifies the new boot by reading all the cared blocks for partitions in |partition_map_|. + bool VerifyPartitions(); + + private: + friend class UpdateVerifierTest; + // 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); + + // Functions to override the care_map_prefix_ and property_reader_, used in test only. + void set_care_map_prefix(const std::string& prefix); + void set_property_reader(const std::function<std::string(const std::string&)>& property_reader); + + std::map<std::string, RangeSet> partition_map_; + // The path to the care_map excluding the filename extension; default value: + // "/data/ota_package/care_map" + std::string care_map_prefix_; + + // The function to read the device property; default value: android::base::GetProperty() + std::function<std::string(const std::string&)> property_reader_; +}; |