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sfc: offload foreign RHS rules without an encap match

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Normally, if a TC filter on a tunnel netdev does not match on any
 encap fields, we decline to offload it, as it cannot meet our
 requirement for a <sip,dip,dport> tuple for the encap match.
However, if the rule has a nonzero chain_index, then for a packet to
 reach the rule, it must already have matched a LHS rule which will
 have included an encap match and determined the tunnel type, so in
 that case we can offload the right-hand-side rule.

Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree 2023-10-02 16:44:42 +01:00 committed by David S. Miller
parent ec1dc6c88c
commit 937a0feab4
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/sfc/tc.c
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@ -1683,7 +1683,7 @@ static int efx_tc_flower_replace_foreign(struct efx_nic *efx,
extack);
if (rc)
goto release;
} else {
} else if (!tc->common.chain_index) {
/* This is not a tunnel decap rule, ignore it */
netif_dbg(efx, drv, efx->net_dev,
"Ignoring foreign filter without encap match\n");