Fix DMA message size calculation #788
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mnissler-rivos
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FWIW, the arch-202307 failure looks unrelated to this change. |
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arch appears to be fundamentally unstable, see #770 |
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please add your signed-off-by |
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LGTM otherwise |
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Thanks for the quick reply!
Gah, my favorite mistake. Fixed now. |
tmakatos
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Jan 24, 2024
jlevon
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When performing DMA via VFIO-user commands over the socket, vfu_dma_transfer breaks large requests into chunks according to the client's maximum data transfer size negotiated at connection setup time. This change fixes the calculation of the chunk size for the case where the last chunk is less than the maximum transfer size. Unfortunately, the existing test didn't catch this due to the request size being a multiple of that maximum data transfer size. Adjust the test to make the last chunk size a true remainder. Signed-off-by: Mattias Nissler <[email protected]>
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Thanks for the quick turnaround, much appreciated! |
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When performing DMA via VFIO-user commands over the socket, vfu_dma_transfer breaks large requests into chunks according to the client's maximum data transfer size negotiated at connection setup time. This change fixes the calculation of the chunk size for the case where the last chunk is less than the maximum transfer size.
Unfortunately, the existing test didn't catch this due to the request size being a multiple of that maximum data transfer size. Adjust the test to make the last chunk size a true remainder.