Lennart Poettering
75bf2627b0
We keep adding fields to the header, and it's fine reading files with different header sizes, as we check via the size if the fields we need are included. However, let's be stricter when writing journal files than when reading, and insist that the header structure in the file actually matches our expectations. Refuse otherwise, so that a new file is created after rotation that then matches our expectations. This makes sure that mismatch in header size is treated exactly as unknown "compatible" flags, which is our other mechanism to allow extending the journal file format in a non-breaking way.
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