[Qemu-devel] [PATCH v4 09/24] scsi: introduce scsi_req_abort

[Paolo Bonzini <pbonzini@redhat.com>]

This covers the case of canceling a request's I/O and still
completing it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 hw/scsi-bus.c    |    9 +++++++++
 hw/scsi.h        |    1 +
 hw/spapr_vscsi.c |    8 ++------
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index a3eb522..b4ba8cd 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -549,6 +549,15 @@ void scsi_req_complete(SCSIRequest *req)
     scsi_req_unref(req);
 }
 
+void scsi_req_abort(SCSIRequest *req, int status)
+{
+    req->status = status;
+    if (req->dev && req->dev->info->cancel_io) {
+        req->dev->info->cancel_io(req);
+    }
+    scsi_req_complete(req);
+}
+
 void scsi_device_purge_requests(SCSIDevice *sdev)
 {
     SCSIRequest *req;
diff --git a/hw/scsi.h b/hw/scsi.h
index 55a24eb..e915ef8 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -114,6 +114,7 @@ int scsi_req_parse(SCSIRequest *req, uint8_t *buf);
 void scsi_req_print(SCSIRequest *req);
 void scsi_req_data(SCSIRequest *req, int len);
 void scsi_req_complete(SCSIRequest *req);
+void scsi_req_abort(SCSIRequest *req, int status);
 void scsi_device_purge_requests(SCSIDevice *sdev);
 
 #endif
diff --git a/hw/spapr_vscsi.c b/hw/spapr_vscsi.c
index cf2ed73..678cd00 100644
--- a/hw/spapr_vscsi.c
+++ b/hw/spapr_vscsi.c
@@ -463,10 +463,8 @@ static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req)
     dprintf("VSCSI: Queued request sense tag 0x%x\n", req->qtag);
     if (n < 0) {
         fprintf(stderr, "VSCSI: REQUEST_SENSE wants write data !?!?!?\n");
-        sdev->info->cancel_io(req->sreq);
         vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
-        vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
-        vscsi_put_req(s, req);
+        scsi_req_abort(req->sreq, CHECK_CONDITION);
         return;
     } else if (n == 0) {
         return;
@@ -547,10 +545,8 @@ static void vscsi_command_complete(SCSIRequest *sreq, int reason, uint32_t arg)
     }
     if (rc < 0) {
         fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
-        sdev->info->cancel_io(sreq);
         vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
-        vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
-        vscsi_put_req(s, req);
+        scsi_req_abort(req->sreq, CHECK_CONDITION);
         return;
     }
 
-- 
1.7.4.4