mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-17 09:43:59 +08:00
72d42504bd
We get a link error when EXPORTFS is not enabled:
ERROR: "exportfs_encode_fh" [fs/overlayfs/overlay.ko] undefined!
ERROR: "exportfs_decode_fh" [fs/overlayfs/overlay.ko] undefined!
This adds a Kconfig 'select' statement for overlayfs, the same way that
it is done for the other users of exportfs.
Fixes: 3a1e819b4e ("ovl: store file handle of lower inode on copy up")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
26 lines
1.1 KiB
Plaintext
26 lines
1.1 KiB
Plaintext
config OVERLAY_FS
|
|
tristate "Overlay filesystem support"
|
|
select EXPORTFS
|
|
help
|
|
An overlay filesystem combines two filesystems - an 'upper' filesystem
|
|
and a 'lower' filesystem. When a name exists in both filesystems, the
|
|
object in the 'upper' filesystem is visible while the object in the
|
|
'lower' filesystem is either hidden or, in the case of directories,
|
|
merged with the 'upper' object.
|
|
|
|
For more information see Documentation/filesystems/overlayfs.txt
|
|
|
|
config OVERLAY_FS_REDIRECT_DIR
|
|
bool "Overlayfs: turn on redirect dir feature by default"
|
|
depends on OVERLAY_FS
|
|
help
|
|
If this config option is enabled then overlay filesystems will use
|
|
redirects when renaming directories by default. In this case it is
|
|
still possible to turn off redirects globally with the
|
|
"redirect_dir=off" module option or on a filesystem instance basis
|
|
with the "redirect_dir=off" mount option.
|
|
|
|
Note, that redirects are not backward compatible. That is, mounting
|
|
an overlay which has redirects on a kernel that doesn't support this
|
|
feature will have unexpected results.
|