On Fri, Aug 05, 2016 at 02:46:11PM +0000, Andre Goree wrote:
>
> I seem to be having trouble using guestmount to mount a Fedora 24 disk that is using XFS. This is the error messings I get when I try:
>
> root@cpdev-cn5:/var/lib/libvirt/images/base# guestmount --rw -a ${disk_path}/${disk_name} -m /dev/${target}1 /tmp/fedora-master/
> libguestfs: error: mount_options: /dev/vda1 on /: mount: wrong fs type, bad option, bad superblock on /dev/vda1,
> missing codepage or helper program, or other error
> In some cases useful info is found in syslog - try
> dmesg | tail or so
> guestmount: '/dev/sda1' could not be mounted. Did you mean one of these?
> /dev/sda1 (xfs)
>
>
>
> Verbose output shows:
> libguestfs: recv_from_daemon: received GUESTFS_LAUNCH_FLAG
> libguestfs: [03647ms] appliance is up
> libguestfs: send_to_daemon: 72 bytes: 00 00 00 44 | 20 00 f5 f5 | 00 00 00 04 | 00 00 00 4a | 00 00 00 00 | ...
> guestfsd: main_loop: new request, len 0x44
> /dev/sda1: No such file or directory
> mount -o /dev/vda1 /sysroot/
> [ 1.759120] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled
> [ 1.762869] XFS (vda1): Version 5 superblock detected. This kernel has EXPERIMENTAL support enabled!
> [ 1.762869] Use of these features in this kernel is at your own risk!
> [ 1.764819] XFS (vda1): Superblock has unknown read-only compatible features (0x1) enabled.
> [ 1.765834] XFS (vda1): Attempted to mount read-only compatible filesystem read-write.
> [ 1.765834] Filesystem can only be safely mounted read only.
> [ 1.767472] XFS (vda1): SB validate failed with error 22.
> mount: wrong fs type, bad option, bad superblock on /dev/vda1,
> missing codepage or helper program, or other error
> In some cases useful info is found in syslog - try
> dmesg | tail or so
>
> guestfsd: error: /dev/vda1 on /: mount: wrong fs type, bad option, bad superblock on /dev/vda1,
> missing codepage or helper program, or other error
> In some cases useful info is found in syslog - try
> dmesg | tail or so
> guestfsd: main_loop: proc 74 (mount_options) took 0.09 seconds
> libguestfs: recv_from_daemon: 272 bytes: 20 00 f5 f5 | 00 00 00 04 | 00 00 00 4a | 00 00 00 01 | 00 12 34 00 | ...
> libguestfs: error: mount_options: /dev/vda1 on /: mount: wrong fs type, bad option, bad superblock on /dev/vda1,
> missing codepage or helper program, or other error
> In some cases useful info is found in syslog - try
> dmesg | tail or so
>
>
>
> I've tried with both /dev/sda1 and /dev/vda1 but no luck. Interestingly enough, a CentOS 7.2 image with XFS and the same setup (i.e., a single partition formatted with XFS) mounts without issue. Any ideas?
You probably need to install libguestfs-xfs on the host.
Rich.
--
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