blockdev_commit_backing_mask_on:test backing_mask on

[aliang123]

When doing commit with backing_mask_protocol on,
the backing raw image format can be identified
correctly as "raw" for "raw format blockdev
elimination".

id:2808

[aliang123]

(1/1) Host_RHEL.m9.ux.ovmf.nbd.raw.virtio_scsi.up.virtio_net.Guest.RHEL.9.x.0.x86_64.io-github-autotest-qemu.blockdev_commit_backing_mask_on.q35: PASS (107.54 s)

details:
{"execute": "block-commit", "arguments": {"base-node": "drive_data", "top-node": "drive_sn3", "backing-mask-protocol": true, "device": "drive_sn4", "job-id": "drive_sn4_RCUg"}, "id": "m5j2cgQT"}

#qemu-img info -U /root/avocado/data/avocado-vt/sn4.qcow2 --output=human
file format: qcow2
virtual size: 2 GiB (2147483648 bytes)
disk size: 11 MiB
cluster_size: 65536
backing file: nbd://10.72.140.40:10831
backing file format: raw

[aliang123]

@zhencliu @XueqiangWei @maxujun , please help review it, thanks.

[maxujun]

(1/1) Host_RHEL.m8.u10.product_rhel.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.8.10.0.ppc64le.io-github-autotest-qemu.blockdev_commit_backing_mask_on: STARTED
(1/1) Host_RHEL.m8.u10.product_rhel.qcow2.virtio_scsi.up.virtio_net.Guest.RHEL.8.10.0.ppc64le.io-github-autotest-qemu.blockdev_commit_backing_mask_on: CANCEL: Got host qemu version:6.2.0-52, which is not in [9.0.0,) (2.95 s)

Not support from ppc side. LGTM.

[XueqiangWei]

LGTM,
Acked-by: [email protected]