Re: [PATCH 6/6] storage: fs: Don't fail volume update if backing store isn't accessible

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On 07/15/2014 07:25 AM, Peter Krempa wrote:
> When the backing store of a volume wasn't accessible while updating the
> volume definition the call would fail alltogether. In cases where we

s/alltogether/altogether/

> currently (incorrectly) treat remote backing stores as local one this
> might lead to strange errors.
> 
> Ignore the opening errors until we figure out how to track proper volume
> metadata.
> ---
>  src/storage/storage_backend.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
> index f5bfdee..fdcaada 100644
> --- a/src/storage/storage_backend.c
> +++ b/src/storage/storage_backend.c
> @@ -1465,7 +1465,8 @@ virStorageBackendUpdateVolInfo(virStorageVolDefPtr vol,
>          (ret = virStorageBackendUpdateVolTargetInfo(vol->target.backingStore,
>                                                      updateCapacity,
>                                                      withBlockVolFormat,
> -                                                    VIR_STORAGE_VOL_OPEN_DEFAULT)) < 0)
> +                                                    VIR_STORAGE_VOL_OPEN_DEFAULT |
> +                                                    VIR_STORAGE_VOL_OPEN_NOERROR) < 0))
>          return ret;
> 

Works for me as a stopgap.  (On IRC, we were discussing that we probably
want to update the storage volume XML for <backingStore> to look a bit
more like domain <disk> backingstore, at least for cases where we know
the backing store is not in the same pool as the source - but that's a
bigger project so worth later patches).

ACK.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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