[Libguestfs] LIBGUESTFS mount disk failure

[Richard W.M. Jones]

On Sat, Sep 16, 2023 at 03:56:07PM +0000, Teja Konapalli wrote:
> Hi Richard & Team,
> 
>  
> 
> Could you please help here on the below failure of mounting disk using
> libguestfs.
> 
>  
> 
> OS version: RHEL 8.2
> 
> Libguestfs version: 1.38.0 stable
> 
>  
> 
>  
> 
> Error logs:
> 
>  
> 
> libguestfs: trace: add_drive_ro "/var/opt/tmp/GRE//RAJA/RAJAT-flat.vmdk"
> libguestfs: trace: add_drive "/var/opt/tmp/GRE//RAJA/RAJAT-flat.vmdk"
> "readonly:true"
> libguestfs: creating COW overlay to protect original drive content
> libguestfs: trace: disk_create "/tmp/libguestfsCpl8My/overlay3.qcow2" "qcow2"
> -1 "backingfile:/var/opt/tmp/GRE//RAJA/RAJAT-flat.vmdk"
> libguestfs: command: run: qemu-img
> libguestfs: command: run: \ create
> libguestfs: command: run: \ -f qcow2
> libguestfs: command: run: \ -o backing_file=/var/opt/tmp/GRE//RAJA/
> RAJAT-flat.vmdk
> libguestfs: command: run: \ /tmp/libguestfsCpl8My/overlay3.qcow2
> Formatting '/tmp/libguestfsCpl8My/overlay3.qcow2', fmt=qcow2 size=21474836480
> backing_file=/var/opt/tmp/GRE//RAJA/RAJAT-flat.vmdk cluster_size=65536
> lazy_refcounts=off refcount_bits=16
> libguestfs: trace: disk_create = -1 (error)

^^ There should be an error message between this two lines.  Without
seeing what the error is, it's hard to know what the problem is.

Is this happening in a program you wrote?  If so you probably want to
read the bit about how to handle error messages:

https://libguestfs.org/guestfs.3.html#error-handling

Rich.

> libguestfs: trace: add_drive = -1 (error)
> libguestfs: trace: add_drive_ro = -1 (error)
> libguestfs: trace: close
> libguestfs: closing guestfs handle 0x1e89340 (state 0)
> libguestfs: command: run: rm
> libguestfs: command: run: \ -rf /tmp/libguestfsCpl8My
> 

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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