netfilter: cttimeout: decouple unlink and free on netns destruction

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Make it so netns pre_exit unlinks the objects from the pernet list, so
they cannot be found anymore.

netns core issues a synchronize_rcu() before calling the exit hooks so
any the time the exit hooks run unconfirmed nf_conn entries have been
free'd or they have been committed to the hashtable.

The exit hook still tags unconfirmed entries as dying, this can
now be removed in a followup change.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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Florian Westphal 2022-04-11 13:01:19 +02:00 • committed by Pablo Neira Ayuso

parent 1397af5bfd

commit 78222bacfc

2 changed files with 28 additions and 10 deletions

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8

include/net/netfilter/nf_conntrack_timeout.h

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