[Qemu-devel] [PATCH v4 08/24] scsi: commonize purging requests

[Paolo Bonzini <pbonzini@redhat.com>]

The code for canceling requests upon reset is already the same.  Clean
it up and move it to scsi-bus.c.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 hw/scsi-bus.c     |   12 ++++++++++++
 hw/scsi-disk.c    |   18 ++----------------
 hw/scsi-generic.c |   18 ++----------------
 hw/scsi.h         |    1 +
 4 files changed, 17 insertions(+), 32 deletions(-)

diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index 94a5873..a3eb522 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -549,6 +549,18 @@ void scsi_req_complete(SCSIRequest *req)
     scsi_req_unref(req);
 }
 
+void scsi_device_purge_requests(SCSIDevice *sdev)
+{
+    SCSIRequest *req;
+
+    while (!QTAILQ_EMPTY(&sdev->requests)) {
+        req = QTAILQ_FIRST(&sdev->requests);
+        sdev->info->cancel_io(req);
+        scsi_req_dequeue(req);
+        scsi_req_unref(req);
+    }
+}
+
 static char *scsibus_get_fw_dev_path(DeviceState *dev)
 {
     SCSIDevice *d = (SCSIDevice*)dev;
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 1fa5385..4b39f46 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -1144,26 +1144,12 @@ static int32_t scsi_send_command(SCSIRequest *req, uint8_t *buf)
     return len;
 }
 
-static void scsi_disk_purge_requests(SCSIDiskState *s)
-{
-    SCSIDiskReq *r;
-
-    while (!QTAILQ_EMPTY(&s->qdev.requests)) {
-        r = DO_UPCAST(SCSIDiskReq, req, QTAILQ_FIRST(&s->qdev.requests));
-        if (r->req.aiocb) {
-            bdrv_aio_cancel(r->req.aiocb);
-        }
-        scsi_req_dequeue(&r->req);
-        scsi_req_unref(&r->req);
-    }
-}
-
 static void scsi_disk_reset(DeviceState *dev)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev.qdev, dev);
     uint64_t nb_sectors;
 
-    scsi_disk_purge_requests(s);
+    scsi_device_purge_requests(&s->qdev);
 
     bdrv_get_geometry(s->bs, &nb_sectors);
     nb_sectors /= s->cluster_size;
@@ -1177,7 +1163,7 @@ static void scsi_destroy(SCSIDevice *dev)
 {
     SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
 
-    scsi_disk_purge_requests(s);
+    scsi_device_purge_requests(&s->qdev);
     blockdev_mark_auto_del(s->qdev.conf.bs);
 }
 
diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index a4b2a69..b0b6ae7 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -421,32 +421,18 @@ static int get_stream_blocksize(BlockDriverState *bdrv)
     return (buf[9] << 16) | (buf[10] << 8) | buf[11];
 }
 
-static void scsi_generic_purge_requests(SCSIGenericState *s)
-{
-    SCSIGenericReq *r;
-
-    while (!QTAILQ_EMPTY(&s->qdev.requests)) {
-        r = DO_UPCAST(SCSIGenericReq, req, QTAILQ_FIRST(&s->qdev.requests));
-        if (r->req.aiocb) {
-            bdrv_aio_cancel(r->req.aiocb);
-        }
-        scsi_req_dequeue(&r->req);
-        scsi_req_unref(&r->req);
-    }
-}
-
 static void scsi_generic_reset(DeviceState *dev)
 {
     SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev.qdev, dev);
 
-    scsi_generic_purge_requests(s);
+    scsi_device_purge_requests(&s->qdev);
 }
 
 static void scsi_destroy(SCSIDevice *d)
 {
     SCSIGenericState *s = DO_UPCAST(SCSIGenericState, qdev, d);
 
-    scsi_generic_purge_requests(s);
+    scsi_device_purge_requests(&s->qdev);
     blockdev_mark_auto_del(s->qdev.conf.bs);
 }
 
diff --git a/hw/scsi.h b/hw/scsi.h
index 3b6899c..55a24eb 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -114,5 +114,6 @@ 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_device_purge_requests(SCSIDevice *sdev);
 
 #endif
-- 
1.7.4.4