On Wed, 27 Feb 2019 20:26:02 -0500, Michael S. Tsirkin wrote: > On Wed, Feb 27, 2019 at 04:52:05PM -0800, Jakub Kicinski wrote: > > On Wed, 27 Feb 2019 19:41:32 -0500, Michael S. Tsirkin wrote: > > > > As this scheme adds much complexity to the kernel naming convention > > > > (currently it's just ethX names) that no userspace can understand. > > > > > > Anything that pokes at slaves needs to be specially designed anyway. > > > Naming seems like a minor issue. > > > > Can the users who care about the naming put net_failover into > > "user space will do the bond enslavement" mode, and do the bond > > creation/management themselves from user space (in systemd/ > > Network Manager) based on the failover flag? > > Putting issues of compatibility aside (userspace tends to be confused if > you give it two devices with same MAC), how would you have it work in > practice? Timer based hacks like netvsc where if userspace didn't > respond within X seconds we assume it won't and do everything ourselves?
Well, what I'm saying is basically if user space knows how to deal with the auto-bonding, we can put aside net_failover for the most part. It can either be blacklisted or it can have some knob which will effectively disable the auto-enslavement. Auto-bonding capable user space can do the renames, spawn the bond, etc. all by itself. I'm basically going back to my initial proposal here :) There is a RedHat bugzilla for the NetworkManager team to do this, but we merged net_failover before those folks got around to implementing it. IOW if NM/systemd is capable of doing the auto-bonding itself it can disable the kernel mechanism and take care of it all. If kernel is booted with an old user space which doesn't have capable NM/systemd - net_failover will kick in and do its best.
