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Date:   Wed, 15 Jan 2020 21:46:28 +0100
From:   Jiri Pirko <>
To:     David Ahern <>
Cc:     Jay Vosburgh <>,
        Leon Romanovsky <>,
        Maor Gottlieb <>,
        "" <>,
        "" <>,
        "" <>,
        Saeed Mahameed <>,
        Jason Gunthorpe <>,
        Jiri Pirko <>,
        Alex Rosenbaum <>,
        "" <>,
        Mark Zhang <>,
        Parav Pandit <>
Subject: Re: Expose bond_xmit_hash function

Wed, Jan 15, 2020 at 07:12:54PM CET, wrote:
>On 1/15/20 11:04 AM, Jay Vosburgh wrote:
>>> Something similar is needed for xdp and not necessarily tied to a
>>> specific bond mode. Some time back I was using this as a prototype:
>>> It is incomplete, but shows the intent - exporting bond_egress_slave for
>>> use by other code to take a bond device and return an egress leg.
>> 	This seems much less awful, but would it make bonding a
>> dependency on pretty much everything?
>The intent is to hide the bond details beyond the general "a bond has
>multiple egress paths and we need to pick one". ie., all of the logic
>and data structures are still private.
>Exporting the function for use by modules is the easy part.
>Making it accessible to core code (XDP) means ??? Obviously not a
>concern when bond is built in but the usual case is a module. One
>solution is to repeat the IPv6 stub format; not great from an indirect
>call perspective. I have not followed the work on INDIRECT_CALL to know
>if that mitigates the concern about the stub when bond is a module.

Why it can't be an ndo as I previously suggested in this thread? It is
not specific to bond, others might like to fillup this ndo too (team,
ovs, bridge).

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