um: Add a generic "fd" vector transport

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Learn to take a pre-opened file-descriptor for vector IO.

Instead of teaching the driver to open a FD in multiple ways, it can
rely on management layer to do it on its behalf. For example, this
allows inheriting a preconfigured device fd or a simple socketpair()
setup, without further arguments, privileges or system access by UML.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

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Marc-André Lureau 2020-04-07 22:28:53 +02:00 • committed by Richard Weinberger

parent 38bccfbeb0

commit bc8f8e4e6e

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arch/um/drivers/vector_user.c

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