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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 /tests/system-kmod-macros.at | |
| 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 'tests/system-kmod-macros.at')
| -rw-r--r-- | tests/system-kmod-macros.at | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/tests/system-kmod-macros.at b/tests/system-kmod-macros.at index 15628a7c6..86d633ac4 100644 --- a/tests/system-kmod-macros.at +++ b/tests/system-kmod-macros.at @@ -99,6 +99,17 @@ m4_define([CHECK_CONNTRACK_FRAG_OVERLAP], # m4_define([CHECK_CONNTRACK_NAT]) +# CHECK_CONNTRACK_ZEROIP_SNAT() +# +# Perform requirements checks for running conntrack all-zero IP SNAT tests. +# The kernel always supports all-zero IP SNAT, so no check is needed. +# However, the Windows datapath using the same netlink interface does not. +# +m4_define([CHECK_CONNTRACK_ZEROIP_SNAT], +[ + AT_SKIP_IF([test "$IS_WIN32" = "yes"]) +]) + # CHECK_CONNTRACK_TIMEOUT() # # Perform requirements checks for running conntrack customized timeout tests. |