66559946ac
Avoid imbalance in host multicast database updates Signed-off-by: Felix Fietkau <nbd@nbd.name>
43 lines
1.3 KiB
Diff
43 lines
1.3 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 22 Aug 2024 18:02:17 +0200
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Subject: [PATCH] net: bridge: fix switchdev host mdb entry updates
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When a mdb entry is removed, the bridge switchdev code can issue a
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switchdev_port_obj_del call for a port that was not offloaded.
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This leads to an imbalance in switchdev_port_obj_add/del calls, since
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br_switchdev_mdb_replay has not been called for the port before.
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This can lead to potential multicast forwarding issues and messages such as:
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mt7915e 0000:01:00.0 wl1-ap0: Failed to del Host Multicast Database entry
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(object id=3) with error: -ENOENT (-2).
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Fix this issue by checking the port offload status when iterating over
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lower devs.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/bridge/br_switchdev.c
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+++ b/net/bridge/br_switchdev.c
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@@ -568,10 +568,18 @@ static void br_switchdev_host_mdb(struct
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struct net_bridge_mdb_entry *mp, int type)
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{
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struct net_device *lower_dev;
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+ struct net_bridge_port *port;
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struct list_head *iter;
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- netdev_for_each_lower_dev(dev, lower_dev, iter)
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+ rcu_read_lock();
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+ netdev_for_each_lower_dev(dev, lower_dev, iter) {
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+ port = br_port_get_rcu(lower_dev);
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+ if (!port || !port->offload_count)
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+ continue;
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+
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br_switchdev_host_mdb_one(dev, lower_dev, mp, type);
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+ }
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+ rcu_read_unlock();
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}
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static int
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