[libvirt] [RFC] Usage about 'virsh vol-wipe vol_name'

[Osier Yang]

On 12/04/13 11:16, harryxiyou wrote:
> On Fri, Apr 12, 2013 at 10:22 AM, harryxiyou <harryxiyou at gmail.com> wrote:
>> Hi all,
>>
>> I am not very clear about the usage of ‘virsh vol-wipe vol_name’. I think
>> if 'virsh vol-wipe vol_name' can just wipe all the datas in this volume and
>> it is similar as we format a volume which the datas would be wiped, right?
>> After this wipe, we can use this volume like a new one.
> After i read the back-end storage drivers for libvirt, i cannot find any storage
> driver like following
>
> 128     VIR_STORAGE_POOL_DIR,      /* Local directory */
> 129     VIR_STORAGE_POOL_FS,       /* Local filesystem */
> 130     VIR_STORAGE_POOL_NETFS,    /* Networked filesystem - eg NFS, GFS, etc */
> 131     VIR_STORAGE_POOL_LOGICAL,  /* Logical volume groups / volumes */
> 132     VIR_STORAGE_POOL_DISK,     /* Disk partitions */
> 133     VIR_STORAGE_POOL_ISCSI,    /* iSCSI targets */
> 134     VIR_STORAGE_POOL_SCSI,     /* SCSI HBA */
> 135     VIR_STORAGE_POOL_MPATH,    /* Multipath devices */
> 136     VIR_STORAGE_POOL_RBD,      /* RADOS Block Device */
> 137     VIR_STORAGE_POOL_SHEEPDOG, /* Sheepdog device */
>
> has realized storageVolumeWipe feature. So how could we test this feature?

As Michal suggested in your previous mail, cscope is a good choice for
you to learn libvirt. E.g. If you looked at the public API for volWipe in
src/libvirt.c, and using cscope like:

cs find s volWipe

You will get where it's implemented.

>
> Could anyone please give me some suggestions? Thanks in advance.
>
>> However, if users just want to wipe portions data of this volume, which
>> command(interface) of libvirt could finish?
>>
>>
>> --
>> Thanks
>> Harry Wei
>
>
> --
> Thanks
> Harry Wei