NAME

rumpfs — rump kernel root file system

LIBRARY

rump kernel (librumpvfs, -lrumpvfs)

DESCRIPTION

rumpfs is a simple in-memory file system for rump kernels. It is automatically mounted as the root file system of a rump kernel at boot time, provided that the VFS faction is configured into the rump kernel instance.

The three main features of rumpfs are:

1. providing a hook for accessing host files via the rump_etfs(3) interfaces.
2. supporting enough of file and directory interfaces to facilitate simple operations such as hosting config files or creating mount points.
3. being small and lightweight so as to keep a barebones rump kernel lightweight.

rumpfs is not intended for hosting large files or big directory hierarchies. If faced with such a use case, mounting a tmpfs file system inside the rump kernel is recommended.

SEE ALSO

rump(3)

HISTORY

rumpfs first appeared in NetBSD 6.0.