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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-26 14:41:16 +07:00
90964016e5
This new bit tells us that the conntrack entry is owned by the flow table offload infrastructure. # cat /proc/net/nf_conntrack ipv4 2 tcp 6 src=10.141.10.2 dst=147.75.205.195 sport=36392 dport=443 src=147.75.205.195 dst=192.168.2.195 sport=443 dport=36392 [OFFLOAD] mark=0 zone=0 use=2 Note the [OFFLOAD] tag in the listing. The timer of such conntrack entries look like stopped from userspace. In practise, to make sure the conntrack entry does not go away, the conntrack timer is periodically set to an arbitrary large value that gets refreshed on every iteration from the garbage collector, so it never expires- and they display no internal state in the case of TCP flows. This allows us to save a bitcheck from the packet path via nf_ct_is_expired(). Conntrack entries that have been offloaded to the flow table infrastructure cannot be deleted/flushed via ctnetlink. The flow table infrastructure is also responsible for releasing this conntrack entry. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> |
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| linux | ||
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