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vhost-scsi: support VIRTIO_SCSI_F_HOTPLUG

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So far there isn't way to test host kernel vhost-scsi event queue path,
because VIRTIO_SCSI_F_HOTPLUG isn't supported by QEMU.

virtio-scsi.c and vhost-user-scsi.c already support VIRTIO_SCSI_F_HOTPLUG
as property "hotplug".

Add support to vhost-scsi.c to help evaluate and test event queue.

To test the feature:

1. Create vhost-scsi target with targetcli.

targetcli /backstores/fileio create name=storage file_or_dev=disk01.raw
targetcli /vhost create naa.1123451234512345
targetcli /vhost/naa.1123451234512345/tpg1/luns create /backstores/fileio/storage

2. Create QEMU instance with vhost-scsi.

-device vhost-scsi-pci,wwpn=naa.1123451234512345,hotplug=true

3. Once guest bootup, hotplug a new LUN from host.

targetcli /backstores/fileio create name=storage02 file_or_dev=disk02.raw
targetcli /vhost/naa.1123451234512345/tpg1/luns create /backstores/fileio/storage02

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Message-Id: <20250203005215.1502-1-dongli.zhang@oracle.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
This commit is contained in:
Dongli Zhang 2025-02-02 16:52:15 -08:00 • committed by Michael S. Tsirkin
parent bc85aae420
commit 1a5a2629ea
1 changed files with 3 additions and 0 deletions
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3
hw/scsi/vhost-scsi.c
View file

@ -359,6 +359,9 @@ static const Property vhost_scsi_properties[] = {
DEFINE_PROP_BIT64("t10_pi", VHostSCSICommon, host_features,
VIRTIO_SCSI_F_T10_PI,
false),
DEFINE_PROP_BIT64("hotplug", VHostSCSICommon, host_features,
VIRTIO_SCSI_F_HOTPLUG,
false),
DEFINE_PROP_BOOL("migratable", VHostSCSICommon, migratable, false),
DEFINE_PROP_BOOL("worker_per_virtqueue", VirtIOSCSICommon,
conf.worker_per_virtqueue, false),