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This patch adds the ability to make the filesystem for a filesystem pool during a pool build. The patch adds two new flags, no overwrite and overwrite, to control when mkfs gets executed. By default, the patch preserves the current behavior, i.e., if no flags are specified, pool build on a filesystem pool only makes the directory on which the filesystem will be mounted. If the no overwrite flag is specified, the target device is checked to determine if a filesystem of the type specified in the pool is present. If a filesystem of that type is already present, mkfs is not executed and the build call returns an error. Otherwise, mkfs is executed and any data present on the device is overwritten. If the overwrite flag is specified, mkfs is always executed, and any existing data on the target device is overwritten unconditionally.
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>