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A previous commit gave the LXC driver the ability to mount block devices for the container filesystem. Through use of the loopback device functionality, we can build on this to support use of plain file images for LXC filesytems. By setting the LO_FLAGS_AUTOCLEAR flag we can ensure that the loop device automatically disappears when the container dies / shuts down * src/lxc/lxc_container.c: Raise error if we see a file based filesystem, since it should have been turned into a loopback device already * src/lxc/lxc_controller.c: Rewrite any filesystems of type=file, into type=block, by binding the file image to a free loop device
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>