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Fix DMA message size calculation #788

Merged
merged 1 commit into from
Jan 24, 2024
Merged

Fix DMA message size calculation #788

merged 1 commit into from
Jan 24, 2024

Commits on Jan 24, 2024

  1. Fix DMA message size calculation 

    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]>
    @mnissler-rivos @jlevon
    mnissler-rivos authored and jlevon committed Jan 24, 2024
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