From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 12 Jan 2012 15:01:29 +0000 (+0100)
Subject: dm: do not forward ioctls from logical volumes to the underlying device
X-Git-Tag: v3.3-rc1~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec8013beddd717d1740cfefb1a9b900deef85462;p=pandora-kernel.git

dm: do not forward ioctls from logical volumes to the underlying device

A logical volume can map to just part of underlying physical volume.
In this case, it must be treated like a partition.

Based on a patch from Alasdair G Kergon.

Cc: Alasdair G Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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