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since commit b884fa46177659 ("netfilter: conntrack: unify sysctl handling")
conntrack no longer exposes most of its sysctls (e.g. tcp timeouts
settings) to network namespaces that are not owned by the initial user
namespace.
This patch exposes all sysctls even if the namespace is unpriviliged.
compared to a 4.19 kernel, the newly visible and writeable sysctls are:
net.netfilter.nf_conntrack_acct
net.netfilter.nf_conntrack_timestamp
.. to allow to enable accouting and timestamp extensions.
net.netfilter.nf_conntrack_events
.. to turn off conntrack event notifications.
net.netfilter.nf_conntrack_checksum
.. to disable checksum validation.
net.netfilter.nf_conntrack_log_invalid
.. to enable logging of packets deemed invalid by conntrack.
newly visible sysctls that are only exported as read-only:
net.netfilter.nf_conntrack_count
.. current number of conntrack entries living in this netns.
net.netfilter.nf_conntrack_max
.. global upperlimit (maximum size of the table).
net.netfilter.nf_conntrack_buckets
.. size of the conntrack table (hash buckets).
net.netfilter.nf_conntrack_expect_max
.. maximum number of permitted expectations in this netns.
net.netfilter.nf_conntrack_helper
.. conntrack helper auto assignment.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
d0febd81ae