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charset="utf-8" `nf_flowtable_udp_timeout` sysctl option is available only if CONFIG_NFT_FLOW_OFFLOAD enabled. But infra for this flow offload UDP timeout was added under CONFIG_NF_FLOW_TABLE config option. So, if you have CONFIG_NFT_FLOW_OFFLOAD disabled and CONFIG_NF_FLOW_TABLE enabled, the `nf_flowtable_udp_timeout` is not present in sysfs. Please note, that TCP flow offload timeout sysctl option is present even CONFIG_NFT_FLOW_OFFLOAD is disabled. I suppose it was a typo in commit that adds UDP flow offload timeout and CONFIG_NF_FLOW_TABLE should be used instead. Fixes: 975c57504da1 ("netfilter: conntrack: Introduce udp offload timeout c= onfiguration") Signed-off-by: Volodymyr Mytnyk --- net/netfilter/nf_conntrack_standalone.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_con= ntrack_standalone.c index 3e1afd10a9b6..55aa55b252b2 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -823,7 +823,7 @@ static struct ctl_table nf_ct_sysctl_table[] =3D { .mode =3D 0644, .proc_handler =3D proc_dointvec_jiffies, }, -#if IS_ENABLED(CONFIG_NFT_FLOW_OFFLOAD) +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE) [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] =3D { .procname =3D "nf_flowtable_udp_timeout", .maxlen =3D sizeof(unsigned int), --=20 2.7.4