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+++ This bug was initially created as a clone of Bug #975760 +++

Description of problem:
add-drive-ro-with-if will hung when specified virtio type.


Version-Release number of selected component (if applicable):
libguestfs-1.20.8-5.el6.x86_64

How reproducible:
100%


Steps to Reproduce:
[root]# qemu-img create /tmp/image 1G
[root]# guestfish add-drive-ro-with-if /tmp/image virtio : run

Actual results:
gueshfish hung

Expected results:
Execute successfully


Additional info:
It works in libguestfs-1.16.32-2.el6.x86_64, Regression

For rhel7, need "export LIBGUESTFS_BACKEND=direct" before boot guestfish

libguestfs-1.22.2-1.el7.x86_64

Fixed upstream in:
f7fe7e8db021b13f40aba56722d6ebe58e3777d2

Regression test:
d8a3185823e608dbddbc6185209951140b8f3b33

Verified with libguestfs-1.22.6-16.el7.x86_64

# export LIBGUESTFS_BACKEND=direct
# qemu-img create /tmp/image 1G
Formatting '/tmp/image', fmt=raw size=1073741824 
# guestfish add-drive-ro-with-if /tmp/image virtio : run

Works well, no hung here

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.