On Wed, Oct 25, 2017 at 10:09 PM, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > By default metadata only copy up is disabled. Provide a mount option so > that users can choose one way or other. > > Also provide a kernel config and module option to enable/disable > metacopy feature. > > Like index feature, when overlay is mounted, on root upper directory we > set ORIGIN which points to lower. And at later mount time it is verified > again. This hopes to get the configuration right. But this does only so > much as we don't verify all the lowers. So it is possible that a lower is > missing and later data copy up fails. Since you bother to specify the motivation for verifying lower root dir, FYI, the main motivation was to detect the case of copied layers. I still hold the opinion that new incompat features should enforce exclusive dir lock, so withholding Reviewed-by on this one for now. -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
