From: Max Reitz <mreitz@redhat.com>

The commit, mirror, and blkreplay block nodes are filters, so they should
be marked as such.

Signed-off-by: Max Reitz <mreitz@redhat.com>
---
 block/blkreplay.c | 1 +
 block/commit.c    | 2 ++
 block/mirror.c    | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/block/blkreplay.c b/block/blkreplay.c
index c96ac8f4bc..131c9e8477 100644
--- a/block/blkreplay.c
+++ b/block/blkreplay.c
@@ -135,6 +135,7 @@ static int blkreplay_snapshot_goto(BlockDriverState *bs,
 static BlockDriver bdrv_blkreplay = {
     .format_name            = "blkreplay",
     .instance_size          = 0,
+    .is_filter              = true,
 
     .bdrv_open              = blkreplay_open,
     .bdrv_child_perm        = bdrv_filter_default_perms,
diff --git a/block/commit.c b/block/commit.c
index 87f6096d90..445a28069b 100644
--- a/block/commit.c
+++ b/block/commit.c
@@ -240,6 +240,8 @@ static BlockDriver bdrv_commit_top = {
     .bdrv_co_block_status       = bdrv_co_block_status_from_backing,
     .bdrv_refresh_filename      = bdrv_commit_top_refresh_filename,
     .bdrv_child_perm            = bdrv_commit_top_child_perm,
+
+    .is_filter                  = true,
 };
 
 void commit_start(const char *job_id, BlockDriverState *bs,
diff --git a/block/mirror.c b/block/mirror.c
index aca95c9bc9..b6de24bc3c 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1527,6 +1527,8 @@ static BlockDriver bdrv_mirror_top = {
     .bdrv_co_block_status       = bdrv_co_block_status_from_backing,
     .bdrv_refresh_filename      = bdrv_mirror_top_refresh_filename,
     .bdrv_child_perm            = bdrv_mirror_top_child_perm,
+
+    .is_filter                  = true,
 };
 
 static BlockJob *mirror_start_job(
-- 
2.21.0