mlx5 silently fails to create an ethernet rte_flow rule

https://bugs.dpdk.org/show_bug.cgi?id=563

            Bug ID: 563
           Summary: mlx5 silently fails to create an ethernet rte_flow
                    rule
           Product: DPDK
           Version: 20.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: [email protected]
          Reporter: [email protected]

Target Milestone: ---

With 20.11-rc1 (since at least -rc0 but maybe before), a rule such as:

flow create 0 ingress pattern eth type is 0x0800 / end actions drop / end

will say "Flow rule #0 created". But nothing is actually programmed in the NIC, and ipv4 packets are not dropped.

But also ones matching mac addresses (anything except eth alone according to my tests). It's also not linked to the action, eg queue index 0 on table 1 to un-drop packets sent to table 1 does not work either.

I also verified with the mlx_steering_dump/mlx_steering_dump_parser.py tool and the rule is indeed not there.

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