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At the vhostmd side virtio channels are Unix domain sockets from QEMU
which are created during a VM start and removed when the VM is stopped.
Basically this implementation
- monitors a directory for new virtio channels
- for valid IDs, also known by libvirtd, it connects to the UDS
- buffers VM/HOST metrics and handles request/response on the sockets
It provides the functions
virtio_init()
init function of virtio layer
virtio_run()
the start_routine for the virtio-thread to handle the virtio based
communication
virtio_metrics_update()
called for each VM/HOST metrics update to update the virtio internal
metrics buffer.
virtio_stop()
stop the virtio-thread