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64200ed61c
The srch compact and orphan scan workers called sync request RPCs that would block indefinitely if the server stopped answering. Both workers are idempotent and reschedule on error, so blocking forever buys nothing compared to treating a stalled RPC as a failure and trying again on the next tick. Add scoutfs_net_sync_request_timeout, a bounded-wait variant that returns -ETIMEDOUT if the response doesn't arrive in time. Response state lives on a refcounted heap allocation rather than the caller's stack so a late callback can't scribble into freed memory. On timeout we race with an arriving response for the msend under conn->lock: if find_request wins we queue_dead_free and drop the callback's ref; otherwise we wait for the in-flight callback to complete before returning. Add _timeout typed wrappers for the four RPCs these workers use and thread a 5 minute bound in from each worker. All other callers keep the unbounded client_sync_request path with its reconnect retries. Signed-off-by: Auke Kok <auke.kok@versity.com>