[PATCH] xfs_quota: fall back silently if XFS_GETNEXTQUOTA fails

[Christoph Hellwig]

On Tue, Aug 02, 2016 at 02:49:00PM +0800, Zorro Lang wrote:
> After XFS_GETNEXTQUOTA feature has been merged into linux kernel and
> xfsprogs, xfs_quota use Q_XGETNEXTQUOTA for report and dump, and
> fall back to old XFS_GETQUOTA ioctl if XFS_GETNEXTQUOTA fails.
> 
> But when XFS_GETNEXTQUOTA fails, xfs_quota print a warning as
> "XFS_GETQUOTA: Invalid argument". That's due to kernel can't
> recognize XFS_GETNEXTQUOTA ioctl and return EINVAL. At this time,
> the warning is helpless, xfs_quota just need to fall back.

We'd still want to report other errors, right?