netdev - [PATCH v3 net-next 3/4] net: switchdev: Relay all replay messages through a central function

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Message-Id: <20240223114453.335809-4-tobias@waldekranz.com>
Date: Fri, 23 Feb 2024 12:44:52 +0100
From: Tobias Waldekranz <tobias@...dekranz.com>
To: davem@...emloft.net,
	kuba@...nel.org
Cc: roopa@...dia.com,
	razor@...ckwall.org,
	bridge@...ts.linux.dev,
	netdev@...r.kernel.org,
	jiri@...nulli.us,
	ivecera@...hat.com,
	rostedt@...dmis.org,
	mhiramat@...nel.org,
	linux-trace-kernel@...r.kernel.org
Subject: [PATCH v3 net-next 3/4] net: switchdev: Relay all replay messages through a central function

This will make it easier to add a tracepoint for all replay messages
later on.

Signed-off-by: Tobias Waldekranz <tobias@...dekranz.com>
---
 include/net/switchdev.h   |  3 +++
 net/bridge/br_switchdev.c | 10 +++++-----
 net/switchdev/switchdev.c | 18 ++++++++++++++++++
 3 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 9bf387664e71..df4db720183f 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -340,6 +340,9 @@ int switchdev_port_obj_add(struct net_device *dev,
 int switchdev_port_obj_del(struct net_device *dev,
 			   const struct switchdev_obj *obj);
 
+int switchdev_call_replay(struct notifier_block *nb, unsigned long type,
+			  struct switchdev_notifier_info *info);
+
 int register_switchdev_notifier(struct notifier_block *nb);
 int unregister_switchdev_notifier(struct notifier_block *nb);
 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
index 7b41ee8740cb..cc9ed7f6bf1c 100644
--- a/net/bridge/br_switchdev.c
+++ b/net/bridge/br_switchdev.c
@@ -306,7 +306,7 @@ br_switchdev_fdb_replay_one(struct net_bridge *br, struct notifier_block *nb,
 
 	br_switchdev_fdb_populate(br, &item, fdb, ctx);
 
-	err = nb->notifier_call(nb, action, &item);
+	err = switchdev_call_replay(nb, action, &item.info);
 	return notifier_to_errno(err);
 }
 
@@ -376,8 +376,8 @@ static int br_switchdev_vlan_attr_replay(struct net_device *br_dev,
 			attr.u.vlan_msti.vid = v->vid;
 			attr.u.vlan_msti.msti = v->msti;
 
-			err = nb->notifier_call(nb, SWITCHDEV_PORT_ATTR_SET,
-						&attr_info);
+			err = switchdev_call_replay(nb, SWITCHDEV_PORT_ATTR_SET,
+						    &attr_info.info);
 			err = notifier_to_errno(err);
 			if (err)
 				return err;
@@ -404,7 +404,7 @@ br_switchdev_vlan_replay_one(struct notifier_block *nb,
 	};
 	int err;
 
-	err = nb->notifier_call(nb, action, &obj_info);
+	err = switchdev_call_replay(nb, action, &obj_info.info);
 	return notifier_to_errno(err);
 }
 
@@ -590,7 +590,7 @@ br_switchdev_mdb_replay_one(struct notifier_block *nb, struct net_device *dev,
 	};
 	int err;
 
-	err = nb->notifier_call(nb, action, &obj_info);
+	err = switchdev_call_replay(nb, action, &obj_info.info);
 	return notifier_to_errno(err);
 }
 
diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c
index c9189a970eec..f73249269a87 100644
--- a/net/switchdev/switchdev.c
+++ b/net/switchdev/switchdev.c
@@ -380,6 +380,24 @@ bool switchdev_port_obj_act_is_deferred(struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(switchdev_port_obj_act_is_deferred);
 
+/**
+ *	switchdev_call_replay - Replay switchdev message to driver
+ *
+ *	@nb: notifier block to send the message to
+ *	@type: value passed unmodified to notifier function
+ *	@info: notifier information data
+ *
+ *	Called by a bridge, in a response to a replay request
+ *	initiated by a port that is either attaching to, or detaching
+ *	from, that bridge.
+ */
+int switchdev_call_replay(struct notifier_block *nb, unsigned long type,
+			  struct switchdev_notifier_info *info)
+{
+	return nb->notifier_call(nb, type, info);
+}
+EXPORT_SYMBOL_GPL(switchdev_call_replay);
+
 static ATOMIC_NOTIFIER_HEAD(switchdev_notif_chain);
 static BLOCKING_NOTIFIER_HEAD(switchdev_blocking_notif_chain);
 
-- 
2.34.1