On Wed, Jun 20, 2012 at 7:18 PM, Goffredo Baroncelli <kreijack@xxxxxxxxx> wrote: > Hi Alexander, > > On 06/20/2012 12:35 PM, Alexander Block wrote: >> The patch also does proper vfs mount checks, so cross mount >> point reflinks are not possible with this patch. It only allows cross >> reflinks between two subvolumes which are in the same mount point. > > Thanks for working on that. What happens if two subvolumes of the same > filesystem are mounted on two different places ? > > I usually do: > mount -o subvol=__active /dev/sdX / > mount -o subvol=. /dev/sdX /var/btrfs > > So two different subvolumes of the same filesystem (the one on /dev/sdX) > are mounted on two different places. > > Is it possible to do > cp --reflink /tmp/foo /var/btrfs/tmp/foo2 This will fail with -EXDEV. The patch explicitly forbids reflinks crossing vfs mount boundaries. > > Thanks > G.Baroncelli > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
