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Chris Lu
21af729cb4
For non-versioned, non-object-lock buckets, PutObject and unversioned DeleteObject now send their metadata write straight to the object key's owner filer (resolved from the lock-ring view) with the precondition attached. The owner serializes the write with its local per-path lock and evaluates the condition atomically, so these paths no longer acquire a distributed lock. The fast path is opt-in per request and falls back to withObjectWriteLock for anything it does not fully cover: versioned or object-lock buckets, conditions that do not reduce to a single primitive (ETag lists, weak ETags, time-based, combined headers), an unresolved owner, or an unreachable owner filer. So behavior is unchanged outside the safe subset. Multi-step finalizations (copy, CompleteMultipartUpload) and versioned writes keep the distributed lock: they mutate several entries under one held lock, which a single conditional create or delete does not cover. DeleteEntry gains the same optional WriteCondition and per-path lock as CreateEntry so a routed conditional delete is atomic on the owner.