On Wed, Jul 08, 2015 at 09:20:46PM -0400, james harvey wrote: > Would (I think): > * btrfs subvolume create <dest-subvolume> > * cp -ax --reflink=always <source-subvolume>/* <dest-subvolume>/ > > Particularly useful to avoid "Invalid cross-device link" when using cp > -ax, when source and dest are seen as different devices. > > Such as if there is a top-level subvolume mounted as /, with others > mounted elsewhere. Required workaround is to mount with subvolid=0 to > /mnt, cp -ax --reflink=always /mnt/...source /mnt/...dest
This is a known limitation of reflinks and intentional, ie. no cross-mountpoint operations are allowed to a single filesystem. The same holds for hardlinks and the reflink duplicates the restrictions. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
