net: Add extack argument to ndo_fdb_add()

Drivers may not be able to support certain FDB entries, and an error
code is insufficient to give clear hints as to the reasons of rejection.

In order to make it possible to communicate the rejection reason, extend
ndo_fdb_add() with an extack argument. Adapt the existing
implementations of ndo_fdb_add() to take the parameter (and ignore it).
Pass the extack parameter when invoking ndo_fdb_add() from rtnl_fdb_add().

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index fc726ce4c164..084a1b3fbc80 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -963,7 +963,8 @@ static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
 static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                            struct net_device *dev,
                            const unsigned char *addr, u16 vid,
-                           u16 flags)
+                           u16 flags,
+                           struct netlink_ext_ack *extack)
 {
         struct macvlan_dev *vlan = netdev_priv(dev);
         int err = -EINVAL;