Documentation/filesystems/overlayfs.rst

44 If all underlying filesystems support NFS file handles and export file
104 must provide valid d_type in readdir responses, so NFS is not suitable.
264 When the NFS export feature is enabled, every copied up directory is
274 NFS export support on an overlay filesystem with no upper layer requires
330 permissions (used by NFS, for example) being ignored (3).
417 With the "inodes index" feature, on the first time mount, an NFS file
425 does not support NFS export, lower filesystem does not have a valid UUID or
501 When the overlay NFS export feature is enabled, overlay filesystems
503 than the behavior when NFS export is disabled.
505 On every copy_up, an NFS file handle of the lower inode, along with the
509 When the NFS export feature is enabled, a lookup of a merged directory,
519 NFS export
522 When the underlying filesystems supports NFS export and the "nfs_export"
523 feature is enabled, an overlay filesystem may be exported to NFS.
575 used NFS export in this setup requires turning off redirect follow (e.g.
580 cause failures to lookup files over NFS.
582 When the NFS export feature is enabled, all directory index entries are