Re: [PATCH nf] netfilter: restore default behavior for nf_conntrack_events

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Hi Nicolas,

On Tue, Jun 04, 2024 at 03:54:38PM +0200, Nicolas Dichtel wrote:
> Since the below commit, there are regressions for legacy setups:
> 1/ conntracks are created while there are no listener
> 2/ a listener starts and dumps all conntracks to get the current state
> 3/ conntracks deleted before the listener has started are not advertised
> 
> This is problematic in containers, where conntracks could be created early.
> This sysctl is part of unsafe sysctl and could not be changed easily in
> some environments.
> 
> Let's switch back to the legacy behavior.

Maybe it is possible to annotate destroy events in a percpu area if
the conntrack extension is not available. This code used to follow
such approach time ago.




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