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| author |   Tobias Waldekranz <tobias@waldekranz.com> | 2022-03-16 16:08:49 +0100 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2022-03-17 16:49:58 -0700 |
| commit | cceac97afa090284b3ceecd93ea6b7b527116767 (patch) | |
| tree | 4e9f098f59d678bff0828c7db417d67e84cc7d7a /net/bridge | |
| parent | net: bridge: mst: Notify switchdev drivers of MST state changes (diff) | |
| download | linux-dev-cceac97afa090284b3ceecd93ea6b7b527116767.tar.xz linux-dev-cceac97afa090284b3ceecd93ea6b7b527116767.zip | |
net: bridge: mst: Add helper to map an MSTI to a VID set
br_mst_get_info answers the question: "On this bridge, which VIDs are
mapped to the given MSTI?"
This is useful in switchdev drivers, which might have to fan-out
operations, relating to an MSTI, per VLAN.
An example: When a port's MST state changes from forwarding to
blocking, a driver may choose to flush the dynamic FDB entries on that
port to get faster reconvergence of the network, but this should only
be done in the VLANs that are managed by the MSTI in question.
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>
Diffstat (limited to 'net/bridge')
| -rw-r--r-- | net/bridge/br_mst.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/net/bridge/br_mst.c b/net/bridge/br_mst.c index 00935a19afcc..00b36e629224 100644 --- a/net/bridge/br_mst.c +++ b/net/bridge/br_mst.c @@ -13,6 +13,32 @@ DEFINE_STATIC_KEY_FALSE(br_mst_used); +int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids) +{ + const struct net_bridge_vlan_group *vg; + const struct net_bridge_vlan *v; + const struct net_bridge *br; + + ASSERT_RTNL(); + + if (!netif_is_bridge_master(dev)) + return -EINVAL; + + br = netdev_priv(dev); + if (!br_opt_get(br, BROPT_MST_ENABLED)) + return -EINVAL; + + vg = br_vlan_group(br); + + list_for_each_entry(v, &vg->vlan_list, vlist) { + if (v->msti == msti) + __set_bit(v->vid, vids); + } + + return 0; +} +EXPORT_SYMBOL_GPL(br_mst_get_info); + static void br_mst_vlan_set_state(struct net_bridge_port *p, struct net_bridge_vlan *v, u8 state) { |