Re: pending changes for TOE support

Reset is fine, given that internally it just calls t3_send_reset.


On 12/16/07, Robert Watson <rwatson_at_freebsd.org> wrote:
>
> On Sat, 15 Dec 2007, Kip Macy wrote:
>
> >> + * + tu_abort
> >> + *   - closes the connection and sends a RST to peer
> >> + *   - driver is expectd to trigger an RST and detach the toepcb
> >>
> >> In regular TCP, the pru_abort method is only called on pending
> connections
> >> while still in the listen queues of a listen socket.  Is this true of
> >> tu_abort, or is tu_abort a more general method to be used to cancel
> >> connections?  If so, probably worth commenting on that.
> >
> > tu_abort is called in place of tcp_output in pru_abort.
>
> The reason I ask is that it appears tu_abort appears to be the only
> interface
> allowing the stack to request that TOE reset of a connection.  In regular
> TCP,
> soabort/pru_abort/tcp_usr_abort are used only on nascent unaccepted
> connections; at least one other path, used by tcpdrop(8), can lead to
> connections being reset as well.  Perhaps a more general tu_reset could be
> used to address this?  I'm not sure what other direct-to-reset paths exist
> but
> a review for them may be called for.
>
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
>