hw: Convert from BlockDriverState to BlockBackend, mostly

Device models should access their block backends only through the
block-backend.h API.  Convert them, and drop direct includes of
inappropriate headers.

Just four uses of BlockDriverState are left:

* The Xen paravirtual block device backend (xen_disk.c) opens images
  itself when set up via xenbus, bypassing blockdev.c.  I figure it
  should go through qmp_blockdev_add() instead.

* Device model "usb-storage" prompts for keys.  No other device model
  does, and this one probably shouldn't do it, either.

* ide_issue_trim_cb() uses bdrv_aio_discard() instead of
  blk_aio_discard() because it fishes its backend out of a BlockAIOCB,
  which has only the BlockDriverState.

* PC87312State has an unused BlockDriverState[] member.

The next two commits take care of the latter two.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

2 files changed, 14 insertions, 14 deletions

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index f2bd954be5..65901ef10e 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -13,6 +13,7 @@
 #include "net/net.h"
 #include "hw/qdev.h"
 #include "qapi/qmp/qerror.h"
+#include "sysemu/block-backend.h"
 #include "sysemu/blockdev.h"
 #include "hw/block/block.h"
 #include "net/hub.h"
@@ -68,16 +69,16 @@ static void set_pointer(Object *obj, Visitor *v, Property *prop,
 
 static int parse_drive(DeviceState *dev, const char *str, void **ptr)
 {
-    BlockDriverState *bs;
+    BlockBackend *blk;
 
-    bs = bdrv_find(str);
-    if (bs == NULL) {
+    blk = blk_by_name(str);
+    if (!blk) {
         return -ENOENT;
     }
-    if (bdrv_attach_dev(bs, dev) < 0) {
+    if (blk_attach_dev(blk, dev) < 0) {
         return -EEXIST;
     }
-    *ptr = bs;
+    *ptr = blk;
     return 0;
 }
 
@@ -85,17 +86,17 @@ static void release_drive(Object *obj, const char *name, void *opaque)
 {
     DeviceState *dev = DEVICE(obj);
     Property *prop = opaque;
-    BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
+    BlockBackend **ptr = qdev_get_prop_ptr(dev, prop);
 
     if (*ptr) {
-        bdrv_detach_dev(*ptr, dev);
+        blk_detach_dev(*ptr, dev);
         blockdev_auto_del(*ptr);
     }
 }
 
 static char *print_drive(void *ptr)
 {
-    return g_strdup(bdrv_get_device_name(ptr));
+    return g_strdup(blk_name(ptr));
 }
 
 static void get_drive(Object *obj, Visitor *v, void *opaque,
@@ -335,12 +336,11 @@ PropertyInfo qdev_prop_vlan = {
 };
 
 int qdev_prop_set_drive(DeviceState *dev, const char *name,
-                        BlockDriverState *value)
+                        BlockBackend *value)
 {
     Error *err = NULL;
-    const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
-    object_property_set_str(OBJECT(dev), bdrv_name,
-                            name, &err);
+    object_property_set_str(OBJECT(dev),
+                            value ? blk_name(value) : "", name, &err);
     if (err) {
         qerror_report_err(err);
         error_free(err);
@@ -350,7 +350,7 @@ int qdev_prop_set_drive(DeviceState *dev, const char *name,
 }
 
 void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name,
-                                BlockDriverState *value)
+                                BlockBackend *value)
 {
     if (qdev_prop_set_drive(dev, name, value) < 0) {
         exit(1);
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 2ed995f2b7..2e47f70eb4 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -1,7 +1,7 @@
 #include "net/net.h"
 #include "hw/qdev.h"
 #include "qapi/qmp/qerror.h"
-#include "sysemu/blockdev.h"
+#include "sysemu/block-backend.h"
 #include "hw/block/block.h"
 #include "net/hub.h"
 #include "qapi/visitor.h"