Petr Machata e4f8647767
vxlan: Track reserved bits explicitly as part of the configuration ...
In order to make it possible to configure which bits in VXLAN header should
be considered reserved, introduce a new field vxlan_config::reserved_bits.
Have it cover the whole header, except for the VNI-present bit and the bits
for VNI itself, and have individual enabled features clear more bits off
reserved_bits.
(This is expressed as first constructing a used_bits set, and then
inverting it to get the reserved_bits. The set of used_bits will be useful
on its own for validation of user-set reserved_bits in a following patch.)
The patch also moves a comment relevant to the validation from the unparsed
validation site up to the new site. Logically this patch should add the new
comment, and a later patch that removes the unparsed bits would remove the
old comment. But keeping both legs in the same patch is better from the
history spelunking point of view.
Signed-off-by: Petr Machata <petrm@nvidia.com >
Reviewed-by: Ido Schimmel <idosch@nvidia.com >
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org >
Link: https://patch.msgid.link/984dbf98d5940d3900268dbffaf70961f731d4a4.1733412063.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org >
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