Section 5.6.6.3 of VirtIO specification states, "Events will also be reported via sense codes..." However, no sense data is sent when VIRTIO_SCSI_EVT_RESET_RESCAN or VIRTIO_SCSI_EVT_RESET_REMOVED events are reported (when disk hotplug/hotunplug events occur). SCSI layer on Solaris depends on this sense data, and hence does not handle disk hotplug/hotunplug events.
As specified in SAM-4, Section 5.14 (h), return a CHECK_CONDITION status with sense data of 0x06/0x3F/0x0E (sense code REPORTED_LUNS_CHANGED) when the disk inventory changes and a command other than INQUIRY, REPORT_LUNS, or REQUEST_SENSE is received. Signed-off-by: Venu Busireddy <venu.busire...@oracle.com> v1 -> v2: - Send the sense data for VIRTIO_SCSI_EVT_RESET_REMOVED event too. --- hw/scsi/virtio-scsi.c | 16 +++++++++++++++- include/hw/virtio/virtio-scsi.h | 1 + 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 41f2a5630173..69194c7ae23c 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -608,7 +608,19 @@ static void virtio_scsi_command_complete(SCSIRequest *r, size_t resid) req->resp.cmd.response = VIRTIO_SCSI_S_OK; req->resp.cmd.status = r->status; - if (req->resp.cmd.status == GOOD) { + if (req->dev->reported_luns_changed && + (req->req.cmd.cdb[0] != INQUIRY) && + (req->req.cmd.cdb[0] != REPORT_LUNS) && + (req->req.cmd.cdb[0] != REQUEST_SENSE)) { + req->dev->reported_luns_changed = false; + req->resp.cmd.resid = 0; + req->resp.cmd.status_qualifier = 0; + req->resp.cmd.status = CHECK_CONDITION; + sense_len = scsi_build_sense(sense, SENSE_CODE(REPORTED_LUNS_CHANGED)); + qemu_iovec_from_buf(&req->resp_iov, sizeof(req->resp.cmd), + sense, sense_len); + req->resp.cmd.sense_len = virtio_tswap32(vdev, sense_len); + } else if (req->resp.cmd.status == GOOD) { req->resp.cmd.resid = virtio_tswap32(vdev, resid); } else { req->resp.cmd.resid = 0; @@ -956,6 +968,7 @@ static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev, virtio_scsi_push_event(s, sd, VIRTIO_SCSI_T_TRANSPORT_RESET, VIRTIO_SCSI_EVT_RESET_RESCAN); + s->reported_luns_changed = true; virtio_scsi_release(s); } } @@ -973,6 +986,7 @@ static void virtio_scsi_hotunplug(HotplugHandler *hotplug_dev, DeviceState *dev, virtio_scsi_push_event(s, sd, VIRTIO_SCSI_T_TRANSPORT_RESET, VIRTIO_SCSI_EVT_RESET_REMOVED); + s->reported_luns_changed = true; virtio_scsi_release(s); } diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h index a36aad9c8695..efbcf9ba069a 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -81,6 +81,7 @@ struct VirtIOSCSI { SCSIBus bus; int resetting; bool events_dropped; + bool reported_luns_changed; /* Fields for dataplane below */ AioContext *ctx; /* one iothread per virtio-scsi-pci for now */