[Qemu-devel] [PATCH v8 11/16] block: Add list of all BlockDriverStates

[Max Reitz <mreitz@redhat.com>]

We need this list so that bdrv_close_all() can keep track of which BDSs
are still open after having removed the BDSs from all of the BBs and
having released all monitor BDS references.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
---
 block.c                   | 7 +++++++
 include/block/block_int.h | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/block.c b/block.c
index be89e8f..f8dd4a3 100644
--- a/block.c
+++ b/block.c
@@ -79,6 +79,9 @@ struct BdrvStates bdrv_states = QTAILQ_HEAD_INITIALIZER(bdrv_states);
 static QTAILQ_HEAD(, BlockDriverState) graph_bdrv_states =
     QTAILQ_HEAD_INITIALIZER(graph_bdrv_states);
 
+static QTAILQ_HEAD(, BlockDriverState) all_bdrv_states =
+    QTAILQ_HEAD_INITIALIZER(all_bdrv_states);
+
 static QLIST_HEAD(, BlockDriver) bdrv_drivers =
     QLIST_HEAD_INITIALIZER(bdrv_drivers);
 
@@ -267,6 +270,8 @@ BlockDriverState *bdrv_new(void)
     bs->refcnt = 1;
     bs->aio_context = qemu_get_aio_context();
 
+    QTAILQ_INSERT_TAIL(&all_bdrv_states, bs, bs_list);
+
     return bs;
 }
 
@@ -2370,6 +2375,8 @@ static void bdrv_delete(BlockDriverState *bs)
     /* remove from list, if necessary */
     bdrv_make_anon(bs);
 
+    QTAILQ_REMOVE(&all_bdrv_states, bs, bs_list);
+
     g_free(bs);
 }
 
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 8730cf6..1e4c518 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -443,6 +443,8 @@ struct BlockDriverState {
     QTAILQ_ENTRY(BlockDriverState) node_list;
     /* element of the list of "drives" the guest sees */
     QTAILQ_ENTRY(BlockDriverState) device_list;
+    /* element of the list of all BlockDriverStates (all_bdrv_states) */
+    QTAILQ_ENTRY(BlockDriverState) bs_list;
     QLIST_HEAD(, BdrvDirtyBitmap) dirty_bitmaps;
     int refcnt;
 
-- 
2.7.0