Many thanks for a quick reply,
 
see also
https://bugzilla.redhat.com/show_bug.cgi?id=1413499#c5
 
Looks like the same issue as mine. But any way - a full log of guestmount, running it with -v -x and host + VM info are attached, probably I've missed something important in the output.
 
Thank you!
 
29.03.2017, 15:47, "Pino Toscano" <ptoscano@redhat.com>:

Hi,

On Wednesday, 29 March 2017 06:28:06 CEST Гюльнара Невежина wrote:

 Does anybody know if the package libguestfs-xfs exists for CentOS 6?


In RHEL/CentOS 6, the support for XFS filesystems in libguestfs is
provided already by the appliance in the 'libguestfs' package.
 

 I faced the problem when tried to change passwd for XFS virtual
 machine based on ext4 CentOS 6 parent server:

 guestmount -a /dev/lvm/xfs.test -i /tmp/cp_mount/xfs.test
 guestmount: no operating system was found on this disk

 If using guestfish '-i' option, remove this option and instead
 use the commands 'run' followed by 'list-filesystems'.
 You can then mount filesystems you want by hand using the
 'mount' or 'mount-ro' command.

 If using guestmount '-i', remove this option and choose the
 filesystem(s) you want to see by manually adding '-m' option(s).
 Use 'virt-filesystems' to see what filesystems are available.

 If using other virt tools, this disk image won't work
 with these tools. Use the guestfish equivalent commands
 (see the virt tool manual page).

 I found that libguestfs-xfs in old Ubuntu distros is included inside
 libguestfs main package but not sure if the same is valid for
 CentOS 6. Right now I can't update my parent server so any advices
 will be greatly appreciated.


Which host system was the XFS filesystem created on? The xfs module in
the RHEL/CentOS 6 kernel is too old to support XFS v5 filesystems
created by more recent kernels -- see also
https://bugzilla.redhat.com/show_bug.cgi?id=1413499#c5
for few more details.

In case your filesystem was created on a RHEL/CentOS 6 host/VM, please
provide a full log of guestmount, running it with -v -x.
 

--
Pino Toscano