On Sat, Aug 7, 2021 at 1:17 PM Zhihao Cheng <chengzhihao1@xxxxxxxxxx> wrote: > > Hi, all. > > As title said. I wonder to know the reason for overlayfs mount failure > with '-o nfs_export=on,metacopy=on'. > > I modified kernel to enable these two options 'on', it looks like that > overlayfs can still work fine under nfs_v4. > > Besides, I can get no more information about the reason from source > code, maybe I missed something. > It's because ovl_obtain_alias() (decoding a disconnected non-dir file handle) does not know how to construct a metacopy overlayfs inode. Maybe Vivek will be able to point you to the discussion that lead to making the features mutually exclusive. I don't remember any other reason. Thanks, Amir.
