John Baldwin 778ce4f297 Return the correct status when a partially completed request is cancelled. ... After the previous changes to fix requests on blocking sockets to complete across multiple operations, an edge case exists where a request can be cancelled after it has partially completed. POSIX doesn't appear to dictate exactly how to handle this case, but in general I feel that aio_cancel() should arrange to cancel any request it can, but that any partially completed requests should return a partial completion rather than ECANCELED. To that end, fix the socket AIO cancellation routine to return a short read/write if a partially completed request is cancelled rather than ECANCELED. Sponsored by: Chelsio Communications		2016-05-24 21:09:05 +00:00
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