Handle non zero copy case in virtio device #174
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May 20, 2014 17:58
…mory The size argument of these functions should be uint64_t instead of int. Currently it causes issues with large guest RAM sizes (2G). Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
We have to properly handle the case when the zero copy is not properly initialised, i.e. vhost_user:rx_buffers() is not used as a source of RX buffers. When this is detected just get a buffer from rx_buffers() and copy everything in it. Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
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May 20, 2014
Handle non zero copy case in virtio device
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This pull request handles the case of receiving non-zero copy packets through the virtio device.
The basic operation is to detect the buffer origin and copy its data to a VM supplied buffer.
There is a special logic to detect when the vm buffers are exhausted and hold processing the incoming packets.