net: flow_offload: add flow_block_cb_setup_simple()

Most drivers do the same thing to set up the flow block callbacks, this
patch adds a helper function to do this.

This preparation patch reduces the number of changes to adapt the
existing drivers to use the flow block callback API.

This new helper function takes a flow block list per-driver, which is
set to NULL until this driver list is used.

This patch also introduces the flow_block_command and
flow_block_binder_type enumerations, which are renamed to use
FLOW_BLOCK_* in follow up patches.

There are three definitions (aliases) in order to reduce the number of
updates in this patch, which go away once drivers are fully adapted to
use this flow block API.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 19 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index e4b06dc484b7..93ef80c16f07 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -3769,24 +3769,6 @@ static int stmmac_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
 	return ret;
 }
 
-static int stmmac_setup_tc_block(struct stmmac_priv *priv,
-				 struct tc_block_offload *f)
-{
-	if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
-		return -EOPNOTSUPP;
-
-	switch (f->command) {
-	case TC_BLOCK_BIND:
-		return tcf_block_cb_register(f->block, stmmac_setup_tc_block_cb,
-				priv, priv, f->extack);
-	case TC_BLOCK_UNBIND:
-		tcf_block_cb_unregister(f->block, stmmac_setup_tc_block_cb, priv);
-		return 0;
-	default:
-		return -EOPNOTSUPP;
-	}
-}
-
 static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
 			   void *type_data)
 {
@@ -3794,7 +3776,9 @@ static int stmmac_setup_tc(struct net_device *ndev, enum tc_setup_type type,
 
 	switch (type) {
 	case TC_SETUP_BLOCK:
-		return stmmac_setup_tc_block(priv, type_data);
+		return flow_block_cb_setup_simple(type_data, NULL,
+						  stmmac_setup_tc_block_cb,
+						  priv, priv, true);
 	case TC_SETUP_QDISC_CBS:
 		return stmmac_tc_setup_cbs(priv, priv, type_data);
 	default: