Roy Shterman 47b6881b97 Libiscsi: Adding abstraction to async functions ...

future iSER implementation will include different implementations
for all socket relative function. in iSER we get event only when
there is new entry in completion queue opposed to TCP that we get event
when we can write to the socket.

1. iscsi_get_fd -
	TCP - returns socket fd.
	ISER - returns completion queue channel fd.
2. iscsi_service -
	TCP -   processing the event type got from the socket
		and handles it.
	ISER -  rearming the event mechanism in the completion queue
		and polling all available completion queue entries for
		process.
3. iscsi_which_events -
	TCP -   returns which type of event the library is waiting for
		(Read, Write or both).
	ISER -  in iSER we are waiting only for POLLIN event, hence this
		function always returns POLLIN.

Signed-off-by: Roy Shterman <roysh@mellanox.com>

2016-06-03 18:54:02 -07:00

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