On Wed, Mar 30, 2022 at 12:23:50PM +0200, Christian Brauner wrote: > Make the two locations where exportfs helpers check permission to lookup > a given inode idmapped mount aware by switching it to the lookup_one() > helper. This is a bugfix for the open_by_handle_at() system call which > doesn't take idmapped mounts into account currently. It's not tied to a > specific commit so we'll just Cc stable. > > In addition this is required to support idmapped base layers in overlay. > The overlay filesystem uses exportfs to encode and decode file handles > for its index=on mount option and when nfs_export=on. This probably wants a Fixes tag, as without it NFS exporting idmapped file will give slightly unexpected results. Otherwise looks fine: Reviewed-by: Christoph Hellwig <hch@xxxxxx>
