Commit | Line | Data |
---|---|---|
ef94b186 | 1 | config OVERLAY_FS |
e9be9d5e | 2 | tristate "Overlay filesystem support" |
72d42504 | 3 | select EXPORTFS |
e9be9d5e MS |
4 | help |
5 | An overlay filesystem combines two filesystems - an 'upper' filesystem | |
6 | and a 'lower' filesystem. When a name exists in both filesystems, the | |
7 | object in the 'upper' filesystem is visible while the object in the | |
8 | 'lower' filesystem is either hidden or, in the case of directories, | |
9 | merged with the 'upper' object. | |
10 | ||
11 | For more information see Documentation/filesystems/overlayfs.txt | |
688ea0e5 MS |
12 | |
13 | config OVERLAY_FS_REDIRECT_DIR | |
14 | bool "Overlayfs: turn on redirect dir feature by default" | |
15 | depends on OVERLAY_FS | |
16 | help | |
17 | If this config option is enabled then overlay filesystems will use | |
18 | redirects when renaming directories by default. In this case it is | |
19 | still possible to turn off redirects globally with the | |
20 | "redirect_dir=off" module option or on a filesystem instance basis | |
21 | with the "redirect_dir=off" mount option. | |
22 | ||
23 | Note, that redirects are not backward compatible. That is, mounting | |
24 | an overlay which has redirects on a kernel that doesn't support this | |
25 | feature will have unexpected results. |