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net: bridge: guard the switchdev replay helpers against a NULL notifier block 

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>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2021-07-21 19:24:02 +03:00 committed by David S. Miller
parent 2f5dc00f7a
commit 7105b50b7e
3 changed files with 9 additions and 0 deletions
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3
net/bridge/br_fdb.c
View File

@ -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;

3
net/bridge/br_mdb.c
View File

@ -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;

3
net/bridge/br_vlan.c
View File

@ -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;