Eric Dumazet c77737b736 netfilter: conntrack: adopt safer max chain length ... Customers using GKE 1.25 and 1.26 are facing conntrack issues root caused to commit c9c3b6811f ("netfilter: conntrack: make max chain length random"). Even if we assume Uniform Hashing, a bucket often reachs 8 chained items while the load factor of the hash table is smaller than 0.5 With a limit of 16, we reach load factors of 3. With a limit of 32, we reach load factors of 11. With a limit of 40, we reach load factors of 15. With a limit of 50, we reach load factors of 24. This patch changes MIN_CHAINLEN to 50, to minimize risks. Ideally, we could in the future add a cushion based on expected load factor (2 * nf_conntrack_max / nf_conntrack_buckets), because some setups might expect unusual values. Fixes: c9c3b6811f ("netfilter: conntrack: make max chain length random") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>		2023-03-07 10:58:06 +01:00
..
ipset	net: Kconfig: fix spellos	2023-01-25 22:39:56 -08:00
ipvs	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next	2023-02-20 10:53:56 +00:00
core.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf	2023-02-22 21:25:23 -08:00
Kconfig	net: create nf_conntrack_ovs for ovs and tc use	2023-02-10 16:23:03 -08:00
Makefile	net: create nf_conntrack_ovs for ovs and tc use	2023-02-10 16:23:03 -08:00
nf_conncount.c
nf_conntrack_acct.c
nf_conntrack_amanda.c
nf_conntrack_bpf.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf	2023-02-22 21:25:23 -08:00
nf_conntrack_broadcast.c
nf_conntrack_core.c	netfilter: conntrack: adopt safer max chain length	2023-03-07 10:58:06 +01:00
nf_conntrack_ecache.c	netfilter: ctnetlink: make event listener tracking global	2023-02-22 00:28:47 +01:00
nf_conntrack_expect.c
nf_conntrack_extend.c
nf_conntrack_ftp.c
nf_conntrack_h323_asn1.c
nf_conntrack_h323_main.c
nf_conntrack_h323_types.c
nf_conntrack_helper.c	net: create nf_conntrack_ovs for ovs and tc use	2023-02-10 16:23:03 -08:00
nf_conntrack_irc.c
nf_conntrack_labels.c
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c	netfilter: ctnetlink: revert to dumping mark regardless of event type	2023-03-06 12:09:23 +01:00
nf_conntrack_ovs.c	net: extract nf_ct_handle_fragments to nf_conntrack_ovs	2023-02-10 16:23:03 -08:00
nf_conntrack_pptp.c
nf_conntrack_proto.c	netfilter: conntrack: remove pr_debug calls	2023-01-18 13:05:24 +01:00
nf_conntrack_proto_dccp.c
nf_conntrack_proto_generic.c
nf_conntrack_proto_gre.c
nf_conntrack_proto_icmp.c
nf_conntrack_proto_icmpv6.c
nf_conntrack_proto_sctp.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2023-02-02 14:49:55 -08:00
nf_conntrack_proto_tcp.c	netfilter: let reset rules clean out conntrack entries	2023-02-17 13:04:56 +01:00
nf_conntrack_proto_udp.c	netfilter: conntrack: udp: fix seen-reply test	2023-02-01 12:18:51 +01:00
nf_conntrack_sane.c
nf_conntrack_seqadj.c
nf_conntrack_sip.c
nf_conntrack_snmp.c
nf_conntrack_standalone.c	netfilter: conntrack: remote a return value of the 'seq_print_acct' function.	2023-02-01 12:18:52 +01:00
nf_conntrack_tftp.c
nf_conntrack_timeout.c
nf_conntrack_timestamp.c
nf_dup_netdev.c
nf_flow_table_core.c	netfilter: flowtable: fixup UDP timeout depending on ct state	2023-02-03 09:31:24 +00:00
nf_flow_table_inet.c	netfilter: flowtable: cache info of last offload	2023-02-03 09:31:24 +00:00
nf_flow_table_ip.c
nf_flow_table_offload.c	netfilter: flowtable: cache info of last offload	2023-02-03 09:31:24 +00:00
nf_flow_table_procfs.c
nf_hooks_lwtunnel.c
nf_internals.h
nf_log.c
nf_log_syslog.c	netfilter: use skb_ip_totlen and iph_totlen	2023-02-01 20:54:27 -08:00
nf_nat_amanda.c
nf_nat_bpf.c	bpf: Add __bpf_kfunc tag to all kfuncs	2023-02-02 00:25:14 +01:00
nf_nat_core.c
nf_nat_ftp.c
nf_nat_helper.c
nf_nat_irc.c
nf_nat_masquerade.c
nf_nat_ovs.c	net: move the nat function to nf_nat_ovs for ovs and tc	2022-12-12 10:14:03 +00:00
nf_nat_proto.c
nf_nat_redirect.c
nf_nat_sip.c
nf_nat_tftp.c
nf_queue.c
nf_sockopt.c
nf_synproxy_core.c
nf_tables_api.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf	2023-02-22 21:25:23 -08:00
nf_tables_core.c	netfilter: nf_tables: avoid retpoline overhead for some ct expression calls	2023-01-18 13:05:25 +01:00
nf_tables_offload.c
nf_tables_trace.c
nfnetlink.c	netfilter: ctnetlink: make event listener tracking global	2023-02-22 00:28:47 +01:00
nfnetlink_acct.c
nfnetlink_cthelper.c
nfnetlink_cttimeout.c
nfnetlink_hook.c
nfnetlink_log.c
nfnetlink_osf.c
nfnetlink_queue.c
nft_bitwise.c
nft_byteorder.c
nft_chain_filter.c
nft_chain_nat.c
nft_chain_route.c
nft_cmp.c
nft_compat.c
nft_connlimit.c
nft_counter.c
nft_ct.c	netfilter: nf_tables: avoid retpoline overhead for some ct expression calls	2023-01-18 13:05:25 +01:00
nft_ct_fast.c	netfilter: nf_tables: avoid retpoline overhead for some ct expression calls	2023-01-18 13:05:25 +01:00
nft_dup_netdev.c
nft_dynset.c
nft_exthdr.c
nft_fib.c
nft_fib_inet.c
nft_fib_netdev.c
nft_flow_offload.c
nft_fwd_netdev.c
nft_hash.c
nft_immediate.c
nft_inner.c
nft_last.c	netfilter: nft_last: copy content when cloning expression	2023-03-01 17:23:23 +01:00
nft_limit.c
nft_log.c
nft_lookup.c
nft_masq.c
nft_meta.c
nft_nat.c
nft_numgen.c
nft_objref.c	netfilter: nf_tables: avoid retpoline overhead for objref calls	2023-01-18 13:05:25 +01:00
nft_osf.c
nft_payload.c	netfilter: nft_payload: incorrect arithmetics when fetching VLAN header bits	2023-01-11 19:18:04 +01:00
nft_queue.c
nft_quota.c	netfilter: nft_quota: copy content when cloning expression	2023-03-01 17:23:23 +01:00
nft_range.c
nft_redir.c
nft_reject.c
nft_reject_inet.c
nft_reject_netdev.c
nft_rt.c
nft_set_bitmap.c
nft_set_hash.c
nft_set_pipapo.c
nft_set_pipapo.h
nft_set_pipapo_avx2.c
nft_set_pipapo_avx2.h
nft_set_rbtree.c	netfilter: nft_set_rbtree: skip elements in transaction from garbage collection	2023-01-23 21:38:33 +01:00
nft_socket.c
nft_synproxy.c
nft_tproxy.c
nft_tunnel.c
nft_xfrm.c
utils.c
x_tables.c
xt_addrtype.c
xt_AUDIT.c
xt_bpf.c
xt_cgroup.c
xt_CHECKSUM.c
xt_CLASSIFY.c
xt_cluster.c
xt_comment.c
xt_connbytes.c
xt_connlabel.c
xt_connlimit.c
xt_connmark.c
xt_CONNSECMARK.c
xt_conntrack.c
xt_cpu.c
xt_CT.c
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c
xt_ecn.c
xt_esp.c
xt_hashlimit.c
xt_helper.c
xt_hl.c
xt_HL.c
xt_HMARK.c
xt_IDLETIMER.c	treewide: Convert del_timer*() to timer_shutdown*()	2022-12-25 13:38:09 -08:00
xt_ipcomp.c
xt_iprange.c
xt_ipvs.c
xt_l2tp.c
xt_LED.c	treewide: Convert del_timer*() to timer_shutdown*()	2022-12-25 13:38:09 -08:00
xt_length.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf	2023-02-22 21:25:23 -08:00
xt_limit.c
xt_LOG.c
xt_mac.c
xt_mark.c
xt_MASQUERADE.c
xt_multiport.c
xt_nat.c
xt_NETMAP.c
xt_nfacct.c
xt_NFLOG.c
xt_NFQUEUE.c
xt_osf.c
xt_owner.c
xt_physdev.c
xt_pkttype.c
xt_policy.c
xt_quota.c
xt_rateest.c
xt_RATEEST.c
xt_realm.c
xt_recent.c
xt_REDIRECT.c
xt_repldata.h
xt_sctp.c
xt_SECMARK.c
xt_set.c
xt_socket.c
xt_state.c
xt_statistic.c
xt_string.c
xt_TCPMSS.c
xt_tcpmss.c
xt_TCPOPTSTRIP.c
xt_tcpudp.c
xt_TEE.c
xt_time.c
xt_TPROXY.c
xt_TRACE.c
xt_u32.c