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| author | Eelco Chaudron <echaudro@redhat.com> | 2021-06-10 11:24:15 +0200 |
|---|---|---|
| committer | Ilya Maximets <i.maximets@ovn.org> | 2021-07-08 21:19:14 +0200 |
| commit | e6ad4d8d9c9273f226ec9a993b64fccfb50bdf4c (patch) | |
| tree | 230b18e5fbc47aa8367f6b2f0bd24993e77747c0 /ofproto/ofproto-dpif.h | |
| parent | 355fef6f2ccbcf78797b938421cb4cef9b59af13 (diff) | |
| download | openvswitch-e6ad4d8d9c9273f226ec9a993b64fccfb50bdf4c.tar.gz | |
conntrack: Document all-zero IP SNAT behavior and add a test case.
Currently, conntrack in the kernel has an undocumented feature referred
to as all-zero IP address SNAT. Basically, when a source port
collision is detected during the commit, the source port will be
translated to an ephemeral port. If there is no collision, no SNAT is
performed.
This patchset documents this behavior and adds a self-test to verify
it's not changing. In addition, a datapath feature flag is added for
the all-zero IP SNAT case. This will help applications on top of OVS,
like OVN, to determine this feature can be used.
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Acked-by: Aaron Conole <aconole@redhat.com>
Acked-by: Dumitru Ceara <dceara@redhat.com>
Acked-by: Alin-Gabriel Serdean <aserdean@ovn.org>
Acked-by: Paolo Valerio <pvalerio@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Diffstat (limited to 'ofproto/ofproto-dpif.h')
| -rw-r--r-- | ofproto/ofproto-dpif.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/ofproto/ofproto-dpif.h b/ofproto/ofproto-dpif.h index b41c3d82a..191cfcb0d 100644 --- a/ofproto/ofproto-dpif.h +++ b/ofproto/ofproto-dpif.h @@ -204,7 +204,10 @@ struct group_dpif *group_dpif_lookup(struct ofproto_dpif *, DPIF_SUPPORT_FIELD(bool, explicit_drop_action, "Explicit Drop action") \ \ /* True if the datapath supports balance_tcp optimization */ \ - DPIF_SUPPORT_FIELD(bool, lb_output_action, "Optimized Balance TCP mode") + DPIF_SUPPORT_FIELD(bool, lb_output_action, "Optimized Balance TCP mode")\ + \ + /* True if the datapath supports all-zero IP SNAT. */ \ + DPIF_SUPPORT_FIELD(bool, ct_zero_snat, "Conntrack all-zero IP SNAT") /* Stores the various features which the corresponding backer supports. */ |