[dm-devel] [PATCH 00/10] fixes for kpartx -d

[Alasdair G Kergon]

On Sat, May 06, 2017 at 12:05:49AM +0200, Martin Wilck wrote:
>   3) kpartx should only delete "partitions", which are single-target
>      linear mappings into a block device. Other maps should not be touched.

The prefix on the dm device's uuid should guarantee this: all devices
kpartx creates should have the same initial characters (a
not-quite-standard form "part" IIRC instead of "KPARTX-") and any
devices without those initial characters must be ignored.

Alasdair