[PATCH net-next,v3 06/11] net: flow_offload: add flow_block_cb_{priv,incref,decref}()

[Pablo Neira Ayuso <pablo@netfilter.org>]

This patch completes the flow block API to introduce:

* flow_block_cb_priv() to accept 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 function are taken from the existing tcf_block_cb_priv(),
tcf_block_cb_incref() and tcf_block_cb_decref().

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
v3: missing in previous batch.

 include/net/flow_offload.h |  4 ++++
 net/core/flow_offload.c    | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 06acde2960fa..342e6aef7e3a 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -277,6 +277,10 @@ struct flow_block_cb *flow_block_cb_lookup(struct net *net,
 					   struct list_head *driver_flow_block_list,
 					   tc_setup_cb_t *cb, void *cb_ident);
 
+void *flow_block_cb_priv(struct flow_block_cb *block_cb);
+void flow_block_cb_incref(struct flow_block_cb *block_cb);
+unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
+
 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
 				     struct flow_block_offload *offload)
 {
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index 85fd5f4a1e0f..916ff32e53e7 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -212,6 +212,24 @@ struct flow_block_cb *flow_block_cb_lookup(struct net *net,
 }
 EXPORT_SYMBOL(flow_block_cb_lookup);
 
+void *flow_block_cb_priv(struct flow_block_cb *block_cb)
+{
+	return block_cb->cb_priv;
+}
+EXPORT_SYMBOL(flow_block_cb_priv);
+
+void flow_block_cb_incref(struct flow_block_cb *block_cb)
+{
+	block_cb->refcnt++;
+}
+EXPORT_SYMBOL(flow_block_cb_incref);
+
+unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb)
+{
+	return --block_cb->refcnt;
+}
+EXPORT_SYMBOL(flow_block_cb_decref);
+
 int flow_block_cb_setup_simple(struct flow_block_offload *f,
 			       struct list_head *driver_block_list,
 			       tc_setup_cb_t *cb, void *cb_ident, void *cb_priv,
-- 
2.11.0