[Bug 2085018] Re: Commit "net/mlx5e: Don't offload internal port if filter device is out device" breaks OpenStack/OVN distributed gateway use case

** Description changed:

Consider a topology with two chassis, A and B:
* A acts as a distributed gateway connected to provider network on tagged VLAN and has GENEVE tunnel configured towards chassis B.
* B hosts the target instance.
* From a third machine connected to the provider network we can observe:
- * Only first ICMP ECHO reply from target instance is forwarded.
- * Attempt to establish TCP connection fails.
+   * Only first ICMP ECHO reply from target instance is forwarded.
+   * Attempt to establish TCP connection fails.

If we revert commit [0] the symptoms disappear.

+ The issue is also present in the most recent mainline version available,
+ so there does not appear to exist a fix for the issue.
+
0: 06b4eac9c4be ("net/mlx5e: Don't offload internal port if filter
device is out device")

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https://bugs.launchpad.net/bugs/2085018

Title:
Commit "net/mlx5e: Don't offload internal port if filter device is out
device" breaks OpenStack/OVN distributed gateway use case

Status in linux package in Ubuntu:
New

Bug description:
Consider a topology with two chassis, A and B:
* A acts as a distributed gateway connected to provider network on tagged VLAN and has GENEVE tunnel configured towards chassis B.
* B hosts the target instance.
* From a third machine connected to the provider network we can observe:
  * Only first ICMP ECHO reply from target instance is forwarded.
  * Attempt to establish TCP connection fails.

If we revert commit [0] the symptoms disappear.

The issue is also present in the most recent mainline version
available, so there does not appear to exist a fix for the issue.

0: 06b4eac9c4be ("net/mlx5e: Don't offload internal port if filter
device is out device")

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