Re: [PATCH v3] vfs: new O_NODE open flag

[Alan Cox]

> Maybe alan was worried about the O_NODE | O_RDWR, etc. case?  That
> simply doesn't make any sense for special files.

I am concerned primarily about the lack of ability to get rid of such a
handle in a controlled fashion. The udev/device unload case is simply one
obvious way to exploit it.

I still don't believe O_NODE makes sense without revoke(), and even then
needs huge amounts of care on the device side of things.
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