Commit 878db9f0 authored Jan 25, 2018 by Jakub Kicinski Committed by David S. Miller Jan 25, 2018

pkt_cls: add new tc cls helper to check offload flag and chain index

Very few (mlxsw) upstream drivers seem to allow offload of chains
other than 0. Save driver developers typing and add a helper for
checking both if ethtool's TC offload flag is on and if chain is 0.
This helper will set the extack appropriately in both error cases.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent fdd6d771

include/net/pkt_cls.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -656,6 +656,20 @@ static inline bool tc_can_offload_extack(const struct net_device *dev,
		return can;
		}

		static inline bool
		tc_cls_can_offload_and_chain0(const struct net_device *dev,
		struct tc_cls_common_offload *common)
		{
		if (!tc_can_offload_extack(dev, common->extack))
		return false;
		if (common->chain_index) {
		NL_SET_ERR_MSG(common->extack,
		"Driver supports only offload of chain 0");
		return false;
		}
		return true;
		}

		static inline bool tc_skip_hw(u32 flags)
		{
		return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;