diff options
| author | Oz Shlomo <ozsh@nvidia.com> | 2021-06-03 15:12:34 +0300 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2021-06-07 12:23:37 +0200 |
| commit | 975c57504da1114551fdb3a91ed61dda7739613e (patch) | |
| tree | b0847114ca10b421e2efe116aa9fff49d3723a3b /net/netfilter | |
| parent | ef8ed5ea091bf21648d0c4c1fa4a962d079eab2b (diff) | |
netfilter: conntrack: Introduce udp offload timeout configuration
UDP connections may be offloaded from nf conntrack to nf flow table.
Offloaded connections are aged after 30 seconds of inactivity.
Once aged, ownership is returned to conntrack with a hard coded pickup
time of 30 seconds, after which the connection may be deleted.
eted. The current aging intervals may be too aggressive for some users.
Provide users with the ability to control the nf flow table offload
aging and pickup time intervals via sysctl parameter as a pre-step for
configuring the nf flow table GC timeout intervals.
Signed-off-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_conntrack_proto_udp.c | 5 | ||||
| -rw-r--r-- | net/netfilter/nf_conntrack_standalone.c | 22 |
2 files changed, 27 insertions, 0 deletions
diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c index af402f458ee0..68911fcaa0f1 100644 --- a/net/netfilter/nf_conntrack_proto_udp.c +++ b/net/netfilter/nf_conntrack_proto_udp.c @@ -270,6 +270,11 @@ void nf_conntrack_udp_init_net(struct net *net) for (i = 0; i < UDP_CT_MAX; i++) un->timeouts[i] = udp_timeouts[i]; + +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE) + un->offload_timeout = 30 * HZ; + un->offload_pickup = 30 * HZ; +#endif } const struct nf_conntrack_l4proto nf_conntrack_l4proto_udp = diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c index 67b0fcd1a787..f57a951c9b5e 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -582,6 +582,10 @@ enum nf_ct_sysctl_index { NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS, NF_SYSCTL_CT_PROTO_TIMEOUT_UDP, NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM, +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE) + NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD, + NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD_PICKUP, +#endif NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP, NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6, #ifdef CONFIG_NF_CT_PROTO_SCTP @@ -812,6 +816,20 @@ static struct ctl_table nf_ct_sysctl_table[] = { .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, +#if IS_ENABLED(CONFIG_NFT_FLOW_OFFLOAD) + [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = { + .procname = "nf_flowtable_udp_timeout", + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_dointvec_jiffies, + }, + [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD_PICKUP] = { + .procname = "nf_flowtable_udp_pickup", + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = proc_dointvec_jiffies, + }, +#endif [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = { .procname = "nf_conntrack_icmp_timeout", .maxlen = sizeof(unsigned int), @@ -1081,6 +1099,10 @@ static int nf_conntrack_standalone_init_sysctl(struct net *net) table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout; table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED]; table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED]; +#if IS_ENABLED(CONFIG_NF_FLOW_TABLE) + table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout; + table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD_PICKUP].data = &un->offload_pickup; +#endif nf_conntrack_standalone_init_tcp_sysctl(net, table); nf_conntrack_standalone_init_sctp_sysctl(net, table); |