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vmm: config: Fix generic vhost-user parsing

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The generic vhost-user device took its virtio device type on the
command line via the `virtio_id` parameter, but the same value is
called `device_type` in the API and the resulting config struct. This
irregularity was due to churn during the review process, `device_type`
was the intended name.

Accept `device_type` on the command line and keep `virtio_id` as a
deprecated alias that logs a warning. The alias will then be removed in
a later release.

Fixes: #8545

Assisted-by: Claude:Opus-4.8
Signed-off-by: Rob Bradford <rbradford@meta.com>
This commit is contained in:
Rob Bradford
2026-07-08 12:18:58 -07:00
parent 30c0fdaff1
commit 818fc07266
4 changed files with 32 additions and 14 deletions
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4
docs/generic-vhost-user.md
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@@ -43,14 +43,14 @@ similar to this:
--disk path=your-linux-image.iso \
--kernel vmlinux \
--cmdline "console=hvc0 root=/dev/vda1 rw" \
--generic-vhost-user "socket=\"${path_to_virtiofsd_socket//\"/\"\"}\",virtio_id=26,queue_sizes=[512,512]" \
--generic-vhost-user "socket=\"${path_to_virtiofsd_socket//\"/\"\"}\",device_type=26,queue_sizes=[512,512]" \
"${other_cloud_hypervisor_options[@]}"
```
26 is the ID for a virtio-fs device. The IDs for other devices are defined
by the VIRTIO specification. The odd-looking variable expansion escapes
any double quotes in the socket path. It is also possible to provide
the name that is defined by the virtio specification, so `virtio_id=fs`
the name that is defined by the virtio specification, so `device_type=fs`
will also work.
Inside the guest, you can mount the virtio-fs device with