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net: bridge: mst: Add helper to check if MST is enabled

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This is useful for switchdev drivers that might want to refuse to join
a bridge where MST is enabled, if the hardware can't support it.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Tobias Waldekranz
2022-03-16 16:08:50 +01:00
committed by Jakub Kicinski
parent cceac97afa
commit 48d57b2e5f
2 changed files with 15 additions and 0 deletions
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9
net/bridge/br_mst.c
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@@ -13,6 +13,15 @@
DEFINE_STATIC_KEY_FALSE(br_mst_used);
bool br_mst_enabled(const struct net_device *dev)
{
if (!netif_is_bridge_master(dev))
return false;
return br_opt_get(netdev_priv(dev), BROPT_MST_ENABLED);
}
EXPORT_SYMBOL_GPL(br_mst_enabled);
int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids)
{
const struct net_bridge_vlan_group *vg;