[PATCH 6.6 1291/1424] net: Add MDB bulk deletion device operation

From
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date
2026-09-12 15:11:29
Also in
linux-patches
Reply to
Greg Kroah-Hartman, 2026-09-12
6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ido Schimmel <idosch@nvidia.com>

[ Upstream commit 1a36e0f50f963465e9b2b980d250ab38b8fcd7a3 ]

Add MDB net device operation that will be invoked by rtnetlink code in
response to received 'RTM_DELMDB' messages with the 'NLM_F_BULK' flag
set. Subsequent patches will implement the operation in the bridge and
VXLAN drivers.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: bc2dc66a6693 ("vxlan: mdb: Fix use-after-free in vxlan_mdb_flush()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/linux/netdevice.h | 6 ++++++
 1 file changed, 6 insertions(+)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 2b4094ac2e3bc..b6e63bcfff30a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1307,6 +1307,9 @@ struct netdev_net_notifier {
  * int (*ndo_mdb_del)(struct net_device *dev, struct nlattr *tb[],
  *		      struct netlink_ext_ack *extack);
  *	Deletes the MDB entry from dev.
+ * int (*ndo_mdb_del_bulk)(struct net_device *dev, struct nlattr *tb[],
+ *			   struct netlink_ext_ack *extack);
+ *	Bulk deletes MDB entries from dev.
  * int (*ndo_mdb_dump)(struct net_device *dev, struct sk_buff *skb,
  *		       struct netlink_callback *cb);
  *	Dumps MDB entries from dev. The first argument (marker) in the netlink
@@ -1591,6 +1594,9 @@ struct net_device_ops {
 	int			(*ndo_mdb_del)(struct net_device *dev,
 					       struct nlattr *tb[],
 					       struct netlink_ext_ack *extack);
+	int			(*ndo_mdb_del_bulk)(struct net_device *dev,
+						    struct nlattr *tb[],
+						    struct netlink_ext_ack *extack);
 	int			(*ndo_mdb_dump)(struct net_device *dev,
 						struct sk_buff *skb,
 						struct netlink_callback *cb);
-- 
2.53.0


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