Hi Andrew,

Thanks for helping!

Andrew Lunn [off-list ref] wrote on Mon, 28 Jan 2019 15:44:17 +0100:

quoted

I don't see where VLAN and bridge information are cached, can you point
me to the relevant locations?  

Miquèl

The bridge should have all that information. You need to ask it to
enumerate the current configuration and replay it to the switch.

There might be something in the Mellanox driver you can copy? But i've
not looked, i'm just guessing.

I am still searching but so far I did not find a mechanism reading the
configuration of the bridge out of a 'net' object. Indeed there are
multiple lists with the configuration but they are all 'mellanox'
objects, they do not belong to the core.

Maybe I don't find this configuration because I don't know what it is.
I imagine this configuration being one (or multiple) list(s), stored
somewhere in a net_device being a bridge. Am I on the wrong path?

Otherwise I might just save my own structures in net/dsa/switch.c like
I did for the mv88e6xx driver, and once this works, net-folks might
want to optimize the memory consumption and re-use the bridge
configuration directly?

We also need to think about how we are going to test this. There is a
lot of state information in a switch. So we are going to need some
pretty good tests to show we have recreated all of it.

My understanding of all this is rather short, until know I used what
you proposed in the v1 of this series but I am all ears if I need to
add anything to my test list.


Thanks,
Miquèl