The VhostUserConfig carries a message with a payload, the contents of
which depend on the kind of device being emulated.
With this change, we calculate the offset of the payload within the
message, check its size corresponds to the expected one, and pass it
to the backend as a reference to a slice adjusted to the payload
dimensions.
The backend will be responsible of validating the payload, as it's the
one aware of its expected contents.
Signed-off-by: Sergio Lopez <slp@redhat.com>
In order to avoid cloud-hypervisor to rely on a pending PR for the empty
crate "vhost", this commit temporarily copies the content of the crate
based on branch jiangliu/v1 18b5081d9199c76eca49da1971c9d1a65e53e5ff.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
