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[ Upstream commit5ce2dced8e] Report the "ipoib pkey", "mode" and "umcast" netlink attributes for every IPoiB interface type, not just children created with 'ip link add'. After setting the rtnl_link_ops for the parent interface, implement the dellink() callback to block users from trying to remove it. Fixes:862096a8bb("IB/ipoib: Add more rtnl_link_ops callbacks") Link: https://lore.kernel.org/r/20201004132948.26669-1-kamalheib1@gmail.com Signed-off-by: Kamal Heib <kamalheib1@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>