Implement a binary cache for OS Login passwd entries.#180
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google-oss-prow[bot] merged 2 commits intoGoogleCloudPlatform:masterfrom Feb 24, 2026
Merged
Implement a binary cache for OS Login passwd entries.#180google-oss-prow[bot] merged 2 commits intoGoogleCloudPlatform:masterfrom
google-oss-prow[bot] merged 2 commits intoGoogleCloudPlatform:masterfrom
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This change introduces a new binary cache format for storing OS Login passwd information. It includes: - `OsLoginPasswdCacheWriter`: A C++ class to build and write the cache file. It buffers user entries, sorts them, and writes them to a temporary file before atomically renaming it. - `oslogin_passwd_cache_reader`: A C implementation for reading from the cache file using mmap. It provides functions compatible with NSS modules for looking up entries by UID, name, and iterating through all entries. - `eytzinger_layout.h`: A template function to convert a sorted vector into an Eytzinger layout, used for the name index to improve cache locality during lookups. - `oslogin_index_structs.h`: Defines the structures used for the UID and Name indices. - New unit tests (`eytzinger_layout_test.cc`, `oslogin_passwd_cache_reader_test.cc`, `round_trip_test.cc`) to validate the cache functionality, including concurrent read access. - The `Makefile` is updated to build and run the new tests. The `main` function is removed from `oslogin_utils_test.cc` as `gtest_main.cc` is now linked.
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: anandadalton, ChaitanyaKulkarni28 The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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This change introduces a new binary cache format for storing OS Login passwd information. It includes:
OsLoginPasswdCacheWriter: A C++ class to build and write the cache file. It buffers user entries, sorts them, and writes them to a temporary file before atomically renaming it.oslogin_passwd_cache_reader: A C implementation for reading from the cache file using mmap. It provides functions compatible with NSS modules for looking up entries by UID, name, and iterating through all entries.eytzinger_layout.h: A template function to convert a sorted vector into an Eytzinger layout, used for the name index to improve cache locality during lookups.oslogin_index_structs.h: Defines the structures used for the UID and Name indices.eytzinger_layout_test.cc,oslogin_passwd_cache_reader_test.cc,round_trip_test.cc) to validate the cache functionality, including concurrent read access.Makefileis updated to build and run the new tests. Themainfunction is removed fromoslogin_utils_test.ccasgtest_main.ccis now linked.