block dangerous passthrough operation

[Christoph Hellwig]

Hi all,

I recently had to debug some testing code that tried to send fabrics
commands and caused a major havoc.  This series adds checks for various
very low-level passthrough commands that have no business sent by anyone
but the driver itself.  The list might now be complete, so discussion
is welcome.

Diffstat:
 ioctl.c |   75 ++++++++++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 57 insertions(+), 18 deletions(-)