net/mlx5e: TC, Support sample offload action for tunneled traffic

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Currently the sample offload actions send the encapsulated packet
to software. This commit decapsulates the packet before performing
the sampling and set the tunnel properties on the skb metadata
fields to make the behavior consistent with OVS sFlow.

If decapsulating first, we can't use the same match like before in
default table. So instantiate a post action instance to continue
processing the action list. If HW can preserve reg_c, also use the
post action instance.

Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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This commit is contained in:

Chris Mi 2021-06-21 10:49:50 +03:00 • committed by Saeed Mahameed

parent ee950e5db1

commit 2741f22309

4 changed files with 214 additions and 91 deletions

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292

drivers/net/ethernet/mellanox/mlx5/core/en/tc/sample.c

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drivers/net/ethernet/mellanox/mlx5/core/en/tc/sample.h

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drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

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drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c

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