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Message-ID: <54049344.4010502@gmail.com>
Date: Mon, 01 Sep 2014 17:39:48 +0200
From: Francis Moreau <francis.moro@gmail.com>
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To: util-linux@vger.kernel.org
Subject: Weird behaviour with lsblk and freshly created loop device
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Sender: util-linux-owner@vger.kernel.org
List-ID: <util-linux.vger.kernel.org>

Hello,

Right after associating a loop device with a disk image file, I'm using
lsblk to retrieve some info about the partitions.

If I'm doing this as root:

  $ losetup /dev/loop0 /tmp/installer-disks/disk0.img && lsblk -n --raw
--paths -o NAME,PARTTYPE /dev/loop0 && losetup -d /dev/loop0

then the output is missing the parttypes:

  /dev/loop0
  /dev/loop0p1
  /dev/loop0p2

However adding a sleep or 'udevadm settle' after setting the loop device
the parttypes are correctly showed:

   $ losetup /dev/loop0 /tmp/installer-disks/disk0.img && udevadm settle
&& lsblk -n --raw --paths -o NAME,PARTTYPE /dev/loop0 && losetup -d
/dev/loop0
  /dev/loop0
  /dev/loop0p1 0657fd6d-a4ab-43c4-84e5-0933c84b4f4f
  /dev/loop0p2 4f68bce3-e8cd-4db1-96e7-fbcaf984b709

Could anybody tell me if that's expected ?

Thanks.