Zach Brown 17dec65a52 scoutfs: add bidirectional network messages ...

The client and server networking code was a bit too rudimentary.

The existing code only had support for the client synchronously and
actively sending requests that the server could only passively respond
to.  We're going to need the server to be able to send requests to
connected clients and it can't block waiting for responses from each
one.

This refactors sending and receiving in both the client and server code
into shared networking code.  It's built around a connection struct that
then holds the message state.  Both peers on the connection can send
requests and send responses.

The existing code only retransmitted requests down newly established
connections.  Requests could be processed twice.

This adds robust reliability guarantees.  Requests are resend until
their response is received.  Requests are only processed once by a given
peer, regardless of the connection's transport socket.  Responses are
reiably resent until acknowledged.

This only adds the new refactored code and disables the old unused code
to keep the diff foot print minmal.  A following commit will remove all
the unused code.

Signed-off-by: Zach Brown <zab@versity.com>

2018-07-27 09:50:21 -07:00

kmod

scoutfs: add bidirectional network messages

2018-07-27 09:50:21 -07:00

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