From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This QEMU patch sets VirtIOSCSIConfig->max_target=0 for vhost-scsi operation
to restrict virtio-scsi LLD guest scanning to max_id=0 (a single target ID
instance) when connected to individual tcm_vhost endpoints.
This ensures that virtio-scsi LLD only attempts to scan target IDs up to
VIRTIO_SCSI_MAX_TARGET when connected via virtio-scsi-raw.
Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxxxxxxxxxx>
Cc: Zhi Yong Wu <wuzhy@xxxxxxxxxxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
hw/virtio-scsi.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/hw/virtio-scsi.c b/hw/virtio-scsi.c
index edda097..ab5ca72 100644
--- a/hw/virtio-scsi.c
+++ b/hw/virtio-scsi.c
@@ -546,7 +546,11 @@ static void virtio_scsi_get_config(VirtIODevice *vdev,
stl_raw(&scsiconf->sense_size, s->sense_size);
stl_raw(&scsiconf->cdb_size, s->cdb_size);
stl_raw(&scsiconf->max_channel, VIRTIO_SCSI_MAX_CHANNEL);
- stl_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET);
+ if (s->vhost_scsi) {
+ stl_raw(&scsiconf->max_target, 0);
+ } else {
+ stl_raw(&scsiconf->max_target, VIRTIO_SCSI_MAX_TARGET);
+ }
stl_raw(&scsiconf->max_lun, VIRTIO_SCSI_MAX_LUN);
}
--
1.7.2.5
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