CONFIG_OVERLAY_FS_INDEX: Overlayfs: turn on inodes index feature by default

General informations

The Linux kernel configuration item CONFIG_OVERLAY_FS_INDEX:

• prompt: Overlayfs: turn on inodes index feature by default
• type: bool
• depends on: CONFIG_OVERLAY_FS
• defined in fs/overlayfs/Kconfig
• found in Linux kernels: 4.13–4.20, 5.0–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

If this config option is enabled then overlay filesystems will use the index directory to map lower inodes to upper inodes by default. In this case it is still possible to turn off index globally with the "index=off" module option or on a filesystem instance basis with the "index=off" mount option.

The inodes index feature prevents breaking of lower hardlinks on copy up.

Note, that the inodes index feature is not backward compatible. That is, mounting an overlay which has an inodes index on a kernel that doesn't support this feature will have unexpected results.

If unsure, say N.

Hardware

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This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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