net: sched: cls_bpf: implement offload tcf_proto_op
Add the offload tcf_proto_op in cls_bpf to generate an offload message for each bpf prog in the given tcf_proto. Call the specified callback with this new offload message. The function only returns an error if the callback rejects adding a 'hardware only' prog. A prog contains a flag to indicate if it is in hardware or not. To ensure the offload function properly maintains this flag, keep a reference counter for the number of instances of the prog that are in hardware. Only update the flag when this counter changes from or to 0. Signed-off-by: NJohn Hurley <john.hurley@netronome.com> Signed-off-by: NJakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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