Re: [PATCH RFC] net: bridge: handle ports in locked mode for ll learning

Am Di., 10. Dez. 2024 um 15:55 Uhr schrieb Vladimir Oltean
[off-list ref]:

On Tue, Dec 10, 2024 at 03:47:11PM +0100, Jonas Gorski wrote:

quoted

Huh, indeed. Unexpected decision, didn't think that this was
intentional. I wonder what the use case for that is.

Ah well, then disregard my patch.

The discussion was here, I don't remember the details:
https://lore.kernel.org/all/20220630111634.610320-1-hans@kapio-technology.com/ (local)

Thanks for the pointer. Reading the discussion, it seems this was
before the explicit BR_PORT_MAB option and locked learning support, so
there was some ambiguity around whether learning on locked ports is
desired or not, and this was needed(?) for the out-of-tree(?) MAB
implementation.

But now that we do have an explicit flag for MAB, maybe this should be
revisited? Especially since with BR_PORT_MAB enabled, entries are
supposed to be learned as locked. But link local learned entries are
still learned unlocked. So no_linklocal_learn still needs to be
enabled for +locked, +learning, +mab.

AFACT at least Hans thought that this should be done when there an
explicit MAB opt in in
https://lore.kernel.org/all/CAKUejP6wCaOKiafvbxYqQs0-RibC0FMKtvkiG=R2Ts0Xfa3-tg@mail.gmail.com/ (local)
and https://lore.kernel.org/all/CAKUejP6xR81p1QeSCnDP_3uh9owafdYr1pifeCzekzUvU3_dPw@mail.gmail.com/ (local).

Best Regards,
Jonas

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