nbd: Change external interface to BlockBackend

Substitute BlockDriverState by BlockBackend in every globally visible
function provided by nbd.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1416309679-333-5-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/nbd.c b/nbd.c
index a7bce45..3fd5743 100644
--- a/nbd.c
+++ b/nbd.c
@@ -19,6 +19,7 @@
 #include "block/nbd.h"
 #include "block/block.h"
 #include "block/block_int.h"
+#include "sysemu/block-backend.h"
 
 #include "block/coroutine.h"
 
@@ -957,10 +958,10 @@ static void bs_aio_detach(void *opaque)
     exp->ctx = NULL;
 }
 
-NBDExport *nbd_export_new(BlockDriverState *bs, off_t dev_offset,
-                          off_t size, uint32_t nbdflags,
-                          void (*close)(NBDExport *))
+NBDExport *nbd_export_new(BlockBackend *blk, off_t dev_offset, off_t size,
+                          uint32_t nbdflags, void (*close)(NBDExport *))
 {
+    BlockDriverState *bs = blk_bs(blk);
     NBDExport *exp = g_malloc0(sizeof(NBDExport));
     exp->refcount = 1;
     QTAILQ_INIT(&exp->clients);
@@ -1056,9 +1057,9 @@ void nbd_export_put(NBDExport *exp)
     }
 }
 
-BlockDriverState *nbd_export_get_blockdev(NBDExport *exp)
+BlockBackend *nbd_export_get_blockdev(NBDExport *exp)
 {
-    return exp->bs;
+    return exp->bs->blk;
 }
 
 void nbd_export_close_all(void)