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