Module mountcompat 

Compatibility helpers for older Linux kernel mount APIs.

This module provides fallback implementations for mount operations on kernels that don’t support the modern mount API, including loopback device setup and temporary mount handling.

Modules

loopback 🔒

Required before 6.12: erofs can’t directly mount files.

tmpmount 🔒

Functions

make_erofs_mountable

Prepares an open erofs image file for mounting.

overlayfs_set_fd

Sets one of the “dir” mount options on an overlayfs to the given file descriptor.

overlayfs_set_lower_and_data_fds

Sets the “lowerdir+” and “datadir+” mount options of an overlayfs mount to the provided file descriptors.

prepare_mount

Prepares a mounted filesystem for further use.