~]# guestmount --rw -a /var/lib/libvirt/images/common-ubuntu-test.bj-test.qcow2 -m /dev/ubuntu-vg/lv-0 /mnt/test
libguestfs: error: mount_options: mount exited with status 32: mount: wrong fs type, bad option, bad superblock on /dev/mapper/ubuntu--vg-lv--0,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.
guestmount: ‘/dev/ubuntu-vg/lv-0’ could not be mounted.
guestmount: Did you mean to mount one of these filesystems?
guestmount: 	/dev/sda1 (unknown)
guestmount: 	/dev/sda2 (xfs)
guestmount: 	/dev/ubuntu-vg/lv-0 (xfs)