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net: bridge: vlan options: add support for tunnel id dumping

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Add a new option - BRIDGE_VLANDB_ENTRY_TUNNEL_ID which is used to dump
the tunnel id mapping. Since they're unique per vlan they can enter a
vlan range if they're consecutive, thus we can calculate the tunnel id
range map simply as: vlan range end id - vlan range start id. The
starting point is the tunnel id in BRIDGE_VLANDB_ENTRY_TUNNEL_ID. This
is similar to how the tunnel entries can be created in a range via the
old API (a vlan range maps to a tunnel range).

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov
2020-03-17 14:08:35 +02:00
committed by David S. Miller
parent 53e96632ab
commit 188c67dd19
4 changed files with 31 additions and 5 deletions
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include/uapi/linux/if_bridge.h
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@@ -192,6 +192,7 @@ enum {
BRIDGE_VLANDB_ENTRY_INFO,
BRIDGE_VLANDB_ENTRY_RANGE,
BRIDGE_VLANDB_ENTRY_STATE,
BRIDGE_VLANDB_ENTRY_TUNNEL_ID,
__BRIDGE_VLANDB_ENTRY_MAX,
};
#define BRIDGE_VLANDB_ENTRY_MAX (__BRIDGE_VLANDB_ENTRY_MAX - 1)