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udp_tunnel: add the ability to hard-code IANA VXLAN

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mlx5 has the IANA VXLAN port (4789) hard coded by the device,
instead of being added dynamically when tunnels are created.

To support this add a workaround flag to struct udp_tunnel_nic_info.
Skipping updates for the port is fairly trivial, dumping the hard
coded port via ethtool requires some code duplication. The port
is not a part of any real table, we dump it in a special table
which has no tunnel types supported and only one entry.

This is the last known workaround / hack needed to convert
all drivers to the new infra.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Jakub Kicinski
2020-07-28 14:47:58 -07:00
committed by Saeed Mahameed
parent b206490940
commit 966e505976
4 changed files with 76 additions and 8 deletions
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3
Documentation/networking/ethtool-netlink.rst
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@@ -1263,6 +1263,9 @@ Kernel response contents:
| | | | ``ETHTOOL_A_TUNNEL_UDP_ENTRY_TYPE`` | u32 | tunnel type |
+-+-+-+---------------------------------------+--------+---------------------+
For UDP tunnel table empty ``ETHTOOL_A_TUNNEL_UDP_TABLE_TYPES`` indicates that
the table contains static entries, hard-coded by the NIC.
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