net: flow_offload: add flow_block_cb_{priv, incref, decref}()
This patch completes the flow block API to introduce: * flow_block_cb_priv() to access callback private data. * flow_block_cb_incref() to bump reference counter on this flow block. * flow_block_cb_decref() to decrement the reference counter. These functions are taken from the existing tcf_block_cb_priv(), tcf_block_cb_incref() and tcf_block_cb_decref(). Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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