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From: Vladimir Oltean <vladimir.oltean@nxp.com>
To: netdev@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,
	"David S. Miller" <davem@davemloft.net>
Cc: Andrew Lunn <andrew@lunn.ch>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Jiri Pirko <jiri@resnulli.us>, Ido Schimmel <idosch@idosch.org>,
	Tobias Waldekranz <tobias@waldekranz.com>,
	Roopa Prabhu <roopa@nvidia.com>,
	Nikolay Aleksandrov <nikolay@nvidia.com>,
	Stephen Hemminger <stephen@networkplumber.org>,
	bridge@lists.linux-foundation.org,
	Grygorii Strashko <grygorii.strashko@ti.com>,
	Marek Behun <kabel@blackhole.sk>,
	DENG Qingfang <dqfext@gmail.com>
Subject: [PATCH v6 net-next 6/7] net: bridge: guard the switchdev replay helpers against a NULL notifier block
Date: Wed, 21 Jul 2021 19:24:02 +0300	[thread overview]
Message-ID: <20210721162403.1988814-7-vladimir.oltean@nxp.com> (raw)
In-Reply-To: <20210721162403.1988814-1-vladimir.oltean@nxp.com>

There is a desire to make the object and FDB replay helpers optional
when moving them inside the bridge driver. For example a certain driver
might not offload host MDBs and there is no case where the replay
helpers would be of immediate use to it.

So it would be nice if we could allow drivers to pass NULL pointers for
the atomic and blocking notifier blocks, and the replay helpers to do
nothing in that case.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 net/bridge/br_fdb.c  | 3 +++
 net/bridge/br_mdb.c  | 3 +++
 net/bridge/br_vlan.c | 3 +++
 3 files changed, 9 insertions(+)

diff --git a/net/bridge/br_fdb.c b/net/bridge/br_fdb.c
index 2b862cffc03a..47f190b6bfa3 100644
--- a/net/bridge/br_fdb.c
+++ b/net/bridge/br_fdb.c
@@ -760,6 +760,9 @@ int br_fdb_replay(const struct net_device *br_dev, const struct net_device *dev,
 	unsigned long action;
 	int err = 0;
 
+	if (!nb)
+		return 0;
+
 	if (!netif_is_bridge_master(br_dev))
 		return -EINVAL;
 
diff --git a/net/bridge/br_mdb.c b/net/bridge/br_mdb.c
index d3383a47a2f2..09358c475787 100644
--- a/net/bridge/br_mdb.c
+++ b/net/bridge/br_mdb.c
@@ -617,6 +617,9 @@ int br_mdb_replay(struct net_device *br_dev, struct net_device *dev,
 
 	ASSERT_RTNL();
 
+	if (!nb)
+		return 0;
+
 	if (!netif_is_bridge_master(br_dev) || !netif_is_bridge_port(dev))
 		return -EINVAL;
 
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index e66b004df763..45ef07f682f1 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -1856,6 +1856,9 @@ int br_vlan_replay(struct net_device *br_dev, struct net_device *dev,
 
 	ASSERT_RTNL();
 
+	if (!nb)
+		return 0;
+
 	if (!netif_is_bridge_master(br_dev))
 		return -EINVAL;
 
-- 
2.25.1


  parent reply	other threads:[~2021-07-21 16:26 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-21 16:23 [PATCH v6 net-next 0/7] Let switchdev drivers offload and unoffload bridge ports at their own convenience Vladimir Oltean
2021-07-21 16:23 ` [PATCH v6 net-next 1/7] net: dpaa2-switch: use extack in dpaa2_switch_port_bridge_join Vladimir Oltean
2021-07-21 16:23 ` [PATCH v6 net-next 2/7] net: dpaa2-switch: refactor prechangeupper sanity checks Vladimir Oltean
2021-07-21 16:23 ` [PATCH v6 net-next 3/7] net: bridge: disambiguate offload_fwd_mark Vladimir Oltean
2021-07-21 16:24 ` [PATCH v6 net-next 4/7] net: bridge: switchdev: recycle unused hwdoms Vladimir Oltean
2021-07-21 16:24 ` [PATCH v6 net-next 5/7] net: bridge: switchdev: let drivers inform which bridge ports are offloaded Vladimir Oltean
2021-07-26 13:51   ` Naresh Kamboju
2021-07-26 14:08     ` Andrew Lunn
2021-07-26 14:37       ` Vladimir Oltean
2021-07-27  4:03       ` Naresh Kamboju
2021-07-21 16:24 ` Vladimir Oltean [this message]
2021-07-21 16:27   ` [PATCH v6 net-next 6/7] net: bridge: guard the switchdev replay helpers against a NULL notifier block Florian Fainelli
2021-07-21 16:24 ` [PATCH v6 net-next 7/7] net: bridge: move the switchdev object replay helpers to "push" mode Vladimir Oltean
2021-07-22  7:40 ` [PATCH v6 net-next 0/7] Let switchdev drivers offload and unoffload bridge ports at their own convenience patchwork-bot+netdevbpf

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