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netfilter: nf_conntrack: add IPS_HW_OFFLOAD status bit

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This bit indicates that the conntrack entry is offloaded to hardware
flow table. nf_conntrack entry will be tagged with [HW_OFFLOAD] if
it's offload to hardware.

cat /proc/net/nf_conntrack
	ipv4 2 tcp 6 \
	src=1.1.1.17 dst=1.1.1.16 sport=56394 dport=5001 \
	src=1.1.1.16 dst=1.1.1.17 sport=5001 dport=56394 [HW_OFFLOAD] \
	mark=0 zone=0 use=3

Note that HW_OFFLOAD/OFFLOAD/ASSURED are mutually exclusive.

Changelog:

* V1->V2:
- Remove check of lastused from stats. It was meant for cases such
  as removing driver module while traffic still running. Better to
  handle such cases from garbage collector.

Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Bodong Wang 2020-04-21 10:04:16 -05:00 • committed by Pablo Neira Ayuso
parent 3fd8dc269f
commit 74f99482ea
3 changed files with 12 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

8
include/uapi/linux/netfilter/nf_conntrack_common.h
View file

@ -114,15 +114,19 @@ enum ip_conntrack_status {
IPS_OFFLOAD_BIT = 14,
IPS_OFFLOAD = (1 << IPS_OFFLOAD_BIT),
/* Conntrack has been offloaded to hardware. */
IPS_HW_OFFLOAD_BIT = 15,
IPS_HW_OFFLOAD = (1 << IPS_HW_OFFLOAD_BIT),
/* Be careful here, modifying these bits can make things messy,
* so don't let users modify them directly.
*/
IPS_UNCHANGEABLE_MASK = (IPS_NAT_DONE_MASK | IPS_NAT_MASK |
IPS_EXPECTED | IPS_CONFIRMED | IPS_DYING |
IPS_SEQ_ADJUST | IPS_TEMPLATE | IPS_UNTRACKED |
IPS_OFFLOAD),
IPS_OFFLOAD | IPS_HW_OFFLOAD),
__IPS_MAX_BIT = 15,
__IPS_MAX_BIT = 16,
};
/* Connection tracking event types */