mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2025-02-22 03:12:22 +00:00
f5b4c14155
virStorageBackendVolDownloadLocal and virStorageBackendVolUploadLocal use virFDStreamOpenFile function to work with the volume fd. virFDStreamOpenFile calls virFDStreamOpenFileInternal that implements handling of the non-blocking I/O. If a file is not a character device and not a fifo, it uses libvirt_iohelper. On FreeBSD, it doesn't work as expected because disk devices (including ZFS volumes) are exposed as character devices, and ZFS volumes do not support open(2) with O_NONBLOCK. To overcome this, introduce a forceIOHelper flag to virFDStreamOpenFileInternal that forces using libvirt_iohelper. And introduce virFDStreamOpenBlockDevice that calls virFDStreamOpenFileInternal with the forceIOHelper set to true.
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>