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, 5 insertions, 21 deletions

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index e5c8aa08e1cd..920dc79e9dc9 100644
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -78,26 +78,6 @@ nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
 	return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
 }
 
-static int
-nsim_setup_tc_block(struct net_device *dev, struct tc_block_offload *f)
-{
-	struct netdevsim *ns = netdev_priv(dev);
-
-	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, nsim_setup_tc_block_cb,
-					     ns, ns, f->extack);
-	case TC_BLOCK_UNBIND:
-		tcf_block_cb_unregister(f->block, nsim_setup_tc_block_cb, ns);
-		return 0;
-	default:
-		return -EOPNOTSUPP;
-	}
-}
-
 static int nsim_set_vf_mac(struct net_device *dev, int vf, u8 *mac)
 {
 	struct netdevsim *ns = netdev_priv(dev);
@@ -226,9 +206,13 @@ static int nsim_set_vf_link_state(struct net_device *dev, int vf, int state)
 static int
 nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
 {
+	struct netdevsim *ns = netdev_priv(dev);
+
 	switch (type) {
 	case TC_SETUP_BLOCK:
-		return nsim_setup_tc_block(dev, type_data);
+		return flow_block_cb_setup_simple(type_data, NULL,
+						  nsim_setup_tc_block_cb,
+						  ns, ns, true);
 	default:
 		return -EOPNOTSUPP;
 	}