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    tipc: introduce message evaluation function · 5a379074
    Jon Paul Maloy 提交于
    When a message arrives in a node and finds no destination
    socket, we may need to drop it, reject it, or forward it after
    a secondary destination lookup. The latter two cases currently
    results in a code path that is perceived as complex, because it
    follows a deep call chain via obscure functions such as
    net_route_named_msg() and net_route_msg().
    
    We now introduce a function, tipc_msg_eval(), that takes the
    decision about whether such a message should be rejected or
    forwarded, but leaves it to the caller to actually perform
    the indicated action.
    
    If the decision is 'reject', it is still the task of the recently
    introduced function tipc_msg_reverse() to take the final decision
    about whether the message is rejectable or not. In the latter case
    it drops the message.
    
    As a result of this change, we can finally eliminate the function
    net_route_named_msg(), and hence become independent of net_route_msg().
    Signed-off-by: NJon Maloy <jon.maloy@ericsson.com>
    Reviewed-by: NErik Hugne <erik.hugne@ericsson.com>
    Reviewed-by: NYing Xue <ying.xue@windriver.com>
    Signed-off-by: NDavid S. Miller <davem@davemloft.net>
    5a379074
socket.c 51.8 KB