i40e: Rx QinQ strip does not work

https://bugs.dpdk.org/show_bug.cgi?id=1122

Bug ID: 1122
Summary: i40e: Rx QinQ strip does not work
Product: DPDK
Version: unspecified
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: Normal
Component: ethdev
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---

Test "usecases/vlan_strip_ip4" of the opensource ethdev verification suite [1] has detected a possible bug in i40e PMD: enabling Rx QinQ stripping has no effect.

The test sends a packet with two tags in the Ethernet header, the outer one having TPID=0x88A8 and the inner one having TPID=0x8100. The packet arrives to the receiver unaltered and with no indication of QinQ / VLAN presence in mbuf flags.

The problem manifests itself in IPv6 case, too.

Should you wish to explore a detailed log example, please refer to [2]. From over there, it is possible to observe results for other iterations exploring the effects of various conditions.

[1] http://mails.dpdk.org/archives/dev/2022-October/251663.html
[2] https://ts-factory.io/bublik/v2/log/163204?focusId=164376&mode=treeAndlog

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