On Mon, Aug 02, 2021 at 03:32:45PM -0500, Patrick Goetz wrote:

On 8/2/21 7:39 AM, J. Bruce Fields wrote:

quoted

On Mon, Aug 02, 2021 at 02:18:29PM +1000, NeilBrown wrote:

quoted

For btrfs, the "location" is root.objectid ++ file.objectid.  I think
the inode should become (file.objectid ^ swab64(root.objectid)).  This
will provide numbers that are unique until you get very large subvols,
and very many subvols.

If you snapshot a filesystem, I'd expect, at least by default, that
inodes in the snapshot to stay the same as in the snapshotted
filesystem.

For copy on right systems like ZFS, how could it be otherwise?

I'm reacting to Neil's suggesting above, which (as I understand it)
would result in different inode numbers.

--b.