Currently the driver allows to configure matching by VLAN EtherType.
However, the retrieval function does not report it back to the user. Add
it.

Before:
|root@host:~# ethtool -N enp3s0 flow-type ether vlan-etype 0x8100 action 0
|Added rule with ID 63
|root@host:~# ethtool --show-ntuple enp3s0
|4 RX rings available
|Total 1 rules
|
|Filter: 63
|        Flow Type: Raw Ethernet
|        Src MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
|        Dest MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
|        Ethertype: 0x0 mask: 0xFFFF
|        Action: Direct to queue 0

After:
|root@host:~# ethtool -N enp3s0 flow-type ether vlan-etype 0x8100 action 0
|Added rule with ID 63
|root@host:~# ethtool --show-ntuple enp3s0
|4 RX rings available
|Total 1 rules
|
|Filter: 63
|        Flow Type: Raw Ethernet
|        Src MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
|        Dest MAC addr: 00:00:00:00:00:00 mask: FF:FF:FF:FF:FF:FF
|        Ethertype: 0x0 mask: 0xFFFF
|        VLAN EtherType: 0x8100 mask: 0x0
|        VLAN: 0x0 mask: 0xffff
|        User-defined: 0x0 mask: 0xffffffffffffffff
|        Action: Direct to queue 0

Fixes: 2b477d057e33 ("igc: Integrate flex filter into ethtool ops")
Signed-off-by: Kurt Kanzenbach <k...@linutronix.de>
Acked-by: Vinicius Costa Gomes <vinicius.go...@intel.com>
---
 drivers/net/ethernet/intel/igc/igc_ethtool.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/intel/igc/igc_ethtool.c 
b/drivers/net/ethernet/intel/igc/igc_ethtool.c
index 785eaa8e0ba8..69b2fd006293 100644
--- a/drivers/net/ethernet/intel/igc/igc_ethtool.c
+++ b/drivers/net/ethernet/intel/igc/igc_ethtool.c
@@ -980,6 +980,12 @@ static int igc_ethtool_get_nfc_rule(struct igc_adapter 
*adapter,
                fsp->m_u.ether_spec.h_proto = ETHER_TYPE_FULL_MASK;
        }
 
+       if (rule->filter.match_flags & IGC_FILTER_FLAG_VLAN_ETYPE) {
+               fsp->flow_type |= FLOW_EXT;
+               fsp->h_ext.vlan_etype = rule->filter.vlan_etype;
+               fsp->m_ext.vlan_etype = ETHER_TYPE_FULL_MASK;
+       }
+
        if (rule->filter.match_flags & IGC_FILTER_FLAG_VLAN_TCI) {
                fsp->flow_type |= FLOW_EXT;
                fsp->h_ext.vlan_tci = htons(rule->filter.vlan_tci);
-- 
2.39.2

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