block: Propagate AioContext change to all children

Instead of propagating any change of a BDS's AioContext only to its file
and backing children and letting driver-specific code do the rest, just
propagate it to all and drop the thus superfluous implementations of
bdrv_{at,de}tach_aio_context() in Quorum, blkverify and VMDK.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 6 insertions, 10 deletions

diff --git a/block.c b/block.c
index cbc10f7480..1205ef8860 100644
--- a/block.c
+++ b/block.c
@@ -3609,6 +3609,7 @@ AioContext *bdrv_get_aio_context(BlockDriverState *bs)
 void bdrv_detach_aio_context(BlockDriverState *bs)
 {
     BdrvAioNotifier *baf;
+    BdrvChild *child;
 
     if (!bs->drv) {
         return;
@@ -3621,11 +3622,8 @@ void bdrv_detach_aio_context(BlockDriverState *bs)
     if (bs->drv->bdrv_detach_aio_context) {
         bs->drv->bdrv_detach_aio_context(bs);
     }
-    if (bs->file) {
-        bdrv_detach_aio_context(bs->file->bs);
-    }
-    if (bs->backing) {
-        bdrv_detach_aio_context(bs->backing->bs);
+    QLIST_FOREACH(child, &bs->children, next) {
+        bdrv_detach_aio_context(child->bs);
     }
 
     bs->aio_context = NULL;
@@ -3635,6 +3633,7 @@ void bdrv_attach_aio_context(BlockDriverState *bs,
                              AioContext *new_context)
 {
     BdrvAioNotifier *ban;
+    BdrvChild *child;
 
     if (!bs->drv) {
         return;
@@ -3642,11 +3641,8 @@ void bdrv_attach_aio_context(BlockDriverState *bs,
 
     bs->aio_context = new_context;
 
-    if (bs->backing) {
-        bdrv_attach_aio_context(bs->backing->bs, new_context);
-    }
-    if (bs->file) {
-        bdrv_attach_aio_context(bs->file->bs, new_context);
+    QLIST_FOREACH(child, &bs->children, next) {
+        bdrv_attach_aio_context(child->bs, new_context);
     }
     if (bs->drv->bdrv_attach_aio_context) {
         bs->drv->bdrv_attach_aio_context(bs, new_context);