Xen devel - Feb 2010 - [PATCH] Fix blktap2 test in xen-hotplug-cleanup

The blktap2 test in xen-hotplug-cleanup was not quite right, causing
orphaned /vm/<uuid>/device node in xenstore.  Attempt to reattach the
device failed:

xen53: # xm block-attach 0 file:/tmp/d0 /dev/xvdp r
xen53: # xm block-detach 0 /dev/xvdp
xen53: # xenstore-ls /vm/00000000-0000-0000-0000-000000000000/device
vbd = ""
 51952 = ""
  frontend = "/local/domain/0/device/vbd/51952"
  frontend-id = "0"
  backend-id = "0"
  backend = "/local/domain/0/backend/vbd/0/51952"
xen53: # xm block-attach 0 file:/tmp/d0 /dev/xvdp r
Error: Device /dev/xvdp (51952, vbd) is already connected.
Usage: xm block-attach <Domain> <BackDev> <FrontDev>
<Mode> [BackDomain]

Attached patch fixes the test.

Regards,
Jim


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