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>
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