Re: Need some help with the RBD Java bindings

[Wido den Hollander <wido@42on.com>]

On 08/20/2013 11:26 PM, Noah Watkins wrote:
> Wido,
>
> I pushed up a patch to
>
>     https://github.com/ceph/rados-java/commit/ca16d82bc5b596620609880e429ec9f4eaa4d5ce
>
> That includes a fix for this problem. The fix is a bit hacky, but the
> tests pass now. I included more details about the hack in the code.
>

I see. Works like a charm for me now. I'll do some further testing with 
CloudStack.

Wido

> On Thu, Aug 15, 2013 at 9:57 AM, Noah Watkins <noah.watkins@inktank.com> wrote:
>> On Thu, Aug 15, 2013 at 8:51 AM, Wido den Hollander <wido@42on.com> wrote:
>>>
>>> public List<RbdSnapInfo> snapList() throws RbdException {
>>>      IntByReference numSnaps = new IntByReference(16);
>>>      PointerByReference snaps = new PointerByReference();
>>>      List<RbdSnapInfo> list = new ArrayList<RbdSnapInfo>();
>>>      RbdSnapInfo snapInfo, snapInfos[];
>>>
>>>      while (true) {
>>>          int r = rbd.rbd_snap_list(this.getPointer(), snaps, numSnaps);
>>
>> I think you need to allocate the memory for `snaps` yourself. Here is
>> the RBD wrapper for Python which does that:
>>
>>    self.snaps = (rbd_snap_info_t * num_snaps.value)()
>>    ret = self.librbd.rbd_snap_list(image.image, byref(self.snaps),
>>                         byref(num_snaps))
>>
>> - Noah
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-- 
Wido den Hollander
42on B.V.

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