netdev - [PATCH v5 net-next 03/15] net: bridge: allow br_fdb_replay to be called for the bridge device

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Message-Id: <20210629140658.2510288-4-olteanv@gmail.com>
Date:   Tue, 29 Jun 2021 17:06:46 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ido Schimmel <idosch@...sch.org>,
        Tobias Waldekranz <tobias@...dekranz.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        bridge@...ts.linux-foundation.org,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH v5 net-next 03/15] net: bridge: allow br_fdb_replay to be called for the bridge device

From: Vladimir Oltean <vladimir.oltean@....com>

When a port joins a bridge which already has local FDB entries pointing
to the bridge device itself, we would like to offload those, so allow
the "dev" argument to be equal to the bridge too. The code already does
what we need in that case.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
v4->v5: split in 2 separate checks, one for br_dev and one for dev,
        because it looks better

 net/bridge/br_fdb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index bad7e84d76af..2b862cffc03a 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -760,7 +760,10 @@ int br_fdb_replay(const struct net_device *br_dev, const struct net_device *dev,
 	unsigned long action;
 	int err = 0;
 
-	if (!netif_is_bridge_master(br_dev) || !netif_is_bridge_port(dev))
+	if (!netif_is_bridge_master(br_dev))
+		return -EINVAL;
+
+	if (!netif_is_bridge_port(dev) && !netif_is_bridge_master(dev))
 		return -EINVAL;
 
 	br = netdev_priv(br_dev);
-- 
2.25.1