diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-02-17 15:08:24 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-02-17 15:08:24 -0800 |
| commit | 0ba83f0968f34543e57d4a4eddc0a9d0c8c88627 (patch) | |
| tree | 552bc50d1b9b2de8d15750bc434adac5d8132bd6 /Documentation | |
| parent | 1d22968feb2095136dd5f03aae2832a6b6aa6628 (diff) | |
| parent | 869056dbbd636f8f256b695f39c102eb3ce2edd0 (diff) | |
Merge tag 'ovl-update-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs
Pull overlayfs update from Amir Goldstein:
"Relax the semantics of uuid=off to cater to a use case of overlayfs
lower layers on btrfs clones, whose UUID are ephemeral and an upper
layer on a different filesystem"
* tag 'ovl-update-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs:
ovl: relax requirement for uuid=off,index=on
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/overlayfs.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/filesystems/overlayfs.rst b/Documentation/filesystems/overlayfs.rst index ab989807a2cb..af5a69f87da4 100644 --- a/Documentation/filesystems/overlayfs.rst +++ b/Documentation/filesystems/overlayfs.rst @@ -753,9 +753,9 @@ Note: the mount options index=off,nfs_export=on are conflicting for a read-write mount and will result in an error. Note: the mount option uuid=off can be used to replace UUID of the underlying -filesystem in file handles with null, and effectively disable UUID checks. This +filesystem in file handles with null, in order to relax the UUID checks. This can be useful in case the underlying disk is copied and the UUID of this copy -is changed. This is only applicable if all lower/upper/work directories are on +is changed. This is only applicable if all lower directories are on the same filesystem, otherwise it will fallback to normal behaviour. @@ -769,7 +769,7 @@ controlled by the "uuid" mount option, which supports these values: UUID of overlayfs is null. fsid is taken from upper most filesystem. - "off": UUID of overlayfs is null. fsid is taken from upper most filesystem. - UUID of underlying layers is ignored. + UUID of underlying layers is ignored and null used instead. - "on": UUID of overlayfs is generated and used to report a unique fsid. UUID is stored in xattr "trusted.overlay.uuid", making overlayfs fsid |