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net: bridge: mst: Allow changing a VLAN's MSTI

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Allow a VLAN to move out of the CST (MSTI 0), to an independent tree.

The user manages the VID to MSTI mappings via a global VLAN
setting. The proposed iproute2 interface would be:

    bridge vlan global set dev br0 vid <VID> msti <MSTI>

Changing the state in non-zero MSTIs is still not supported, but will
be addressed in upcoming changes.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.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 16:08:44 +01:00 • committed by Jakub Kicinski
parent ec7328b591
commit 8c678d6056
4 changed files with 59 additions and 0 deletions
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1
include/uapi/linux/if_bridge.h
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@ -564,6 +564,7 @@ enum {
BRIDGE_VLANDB_GOPTS_MCAST_QUERIER,
BRIDGE_VLANDB_GOPTS_MCAST_ROUTER_PORTS,
BRIDGE_VLANDB_GOPTS_MCAST_QUERIER_STATE,
BRIDGE_VLANDB_GOPTS_MSTI,
__BRIDGE_VLANDB_GOPTS_MAX
};
#define BRIDGE_VLANDB_GOPTS_MAX (__BRIDGE_VLANDB_GOPTS_MAX - 1)