diff options
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/overlayfs.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/filesystems/overlayfs.rst b/Documentation/filesystems/overlayfs.rst index d55381d3fa0f..8275ed735f77 100644 --- a/Documentation/filesystems/overlayfs.rst +++ b/Documentation/filesystems/overlayfs.rst @@ -671,6 +671,9 @@ controlled by the "uuid" mount option, which supports these values: UUID of underlying layers is ignored. - "on": UUID of overlayfs is generated and used to report a unique fsid. + UUID is stored in xattr "trusted.overlay.uuid", making overlayfs fsid + unique and persistent. This option requires an overlayfs with upper + filesystem that supports xattrs. Volatile mount |