On Wed, 21 Jun 2006 20:31:21 +0100
Alasdair G Kergon <[email protected]> wrote:
> From: Milan Broz <[email protected]>
>
> Extend the core device-mapper infrastructure to accept arbitrary ioctls
> on a mapped device provided that it has exactly one target and it is
> capable of supporting ioctls.
I don't understand that. We're taking an ioctl against a dm device and
we're passing it through to an underlying device? Or something else?
Care to flesh this out a bit?
> [We can't use unlocked_ioctl because we need 'inode': 'file' might be NULL.
> Is it worth changing this?]
It _should_ be possible to use unlocked_ioctl() - unlocked_ioctl() would be
pretty useless if someone was passing it a NULL file*. More details?
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