Re: [PATCH 0/3] Autoloading for RDMA netlink modules

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

On Tue, Jul 25, 2017 at 08:34:20AM -0600, Jason Gunthorpe wrote:

> > Second, from brief review, it is unclear to me, how do you protect
> > autoload caused by regular user who sends netlink message to ib_core.
> 
> You don't, that isn't how kernel auto loading works. Any user can
> attempt to create any kind of socket and the core kernel code will
> load the correct module to support that socket. That is the standard
> way kernel autoloading works, particularly for net families.

I should clarify some more that this is needed to avoid problematic
dependencies during boot up.

For instance, long term, I want to use rdma netlink from within udev
to fill in some more ID_ fields in the database, I cannot resolve the
race conditions with udev running and modules loading unless the
kernel can fully autoload the netlink subystem, just like other
netlink subsystems.

Jason
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