linux

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Florian Westphal 19c942f7d2 netfilter: nfnetlink: re-enable conntrack expectation events

commit 0b2f3212b551a87fe936701fa0813032861a3308 upstream.

To avoid allocation of the conntrack extension area when possible,
the default behaviour was changed to only allocate the event extension
if a userspace program is subscribed to a notification group.

Problem is that while 'conntrack -E' does enable the event allocation
behind the scenes, 'conntrack -E expect' does not: no expectation events
are delivered unless user sets
"net.netfilter.nf_conntrack_events" back to 1 (always on).

Fix the autodetection to also consider EXP type group.

We need to track the 6 event groups (3+3, new/update/destroy for events and
for expectations each) independently, else we'd disable events again
if an expectation group becomes empty while there is still an active
event group.

Fixes: 2794cdb0b97b ("netfilter: nfnetlink: allow to detect if ctnetlink listeners exist")
Reported-by: Yi Chen <yiche@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-08-25 11:45:30 +02:00

bpf.h

bpf: Invert the dependency between bpf-netns.h and netns/bpf.h

2021-12-29 20:03:05 -08:00

can.h

can: remove obsolete version strings

2020-10-12 10:06:39 +02:00

conntrack.h

netfilter: nfnetlink: re-enable conntrack expectation events

2022-08-25 11:45:30 +02:00

core.h

txhash: Make rethinking txhash behavior configurable via sysctl