query-block, query-named-block-nodes, and query-blockstats now return
any filtered child under "backing", not just bs->backing or COW
children. This is so that filters do not interrupt the reported backing
chain. This changes the output for iotest 184, as the throttled node
now appears as a backing child.
Signed-off-by: Max Reitz <mre...@redhat.com>
---
block/qapi.c | 39 +++++++++++++++++++++++---------------
tests/qemu-iotests/184.out | 7 ++++++-
2 files changed, 30 insertions(+), 16 deletions(-)
diff --git a/block/qapi.c b/block/qapi.c
index 9a185cba48..4f59ac1c0f 100644
--- a/block/qapi.c
+++ b/block/qapi.c
@@ -156,9 +156,13 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
return NULL;
}
- if (bs0->drv && bs0->backing) {
+ if (bs0->drv && bdrv_filtered_child(bs0)) {
+ /*
+ * Put any filtered child here (for backwards compatibility to when
+ * we put bs0->backing here, which might be any filtered child).
+ */
info->backing_file_depth++;
- bs0 = bs0->backing->bs;
+ bs0 = bdrv_filtered_bs(bs0);
(*p_image_info)->has_backing_image = true;
p_image_info = &((*p_image_info)->backing_image);
} else {
@@ -167,9 +171,8 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
/* Skip automatically inserted nodes that the user isn't aware of for
* query-block (blk != NULL), but not for query-named-block-nodes */
- while (blk && bs0->drv && bs0->implicit) {
- bs0 = backing_bs(bs0);
- assert(bs0);
+ if (blk) {
+ bs0 = bdrv_skip_implicit_filters(bs0);
}
}
@@ -354,9 +357,9 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo
**p_info,
BlockDriverState *bs = blk_bs(blk);
char *qdev;
- /* Skip automatically inserted nodes that the user isn't aware of */
- while (bs && bs->drv && bs->implicit) {
- bs = backing_bs(bs);
+ if (bs) {
+ /* Skip automatically inserted nodes that the user isn't aware of */
+ bs = bdrv_skip_implicit_filters(bs);
}
info->device = g_strdup(blk_name(blk));
@@ -513,6 +516,7 @@ static void bdrv_query_blk_stats(BlockDeviceStats *ds,
BlockBackend *blk)
static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
bool blk_level)
{
+ BlockDriverState *storage_bs, *filtered_bs;
BlockStats *s = NULL;
s = g_malloc0(sizeof(*s));
@@ -525,9 +529,8 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState
*bs,
/* Skip automatically inserted nodes that the user isn't aware of in
* a BlockBackend-level command. Stay at the exact node for a node-level
* command. */
- while (blk_level && bs->drv && bs->implicit) {
- bs = backing_bs(bs);
- assert(bs);
+ if (blk_level) {
+ bs = bdrv_skip_implicit_filters(bs);
}
if (bdrv_get_node_name(bs)[0]) {
@@ -537,14 +540,20 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState
*bs,
s->stats->wr_highest_offset = stat64_get(&bs->wr_highest_offset);
- if (bs->file) {
+ storage_bs = bdrv_storage_bs(bs);
+ if (storage_bs) {
s->has_parent = true;
- s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
+ s->parent = bdrv_query_bds_stats(storage_bs, blk_level);
}
- if (blk_level && bs->backing) {
+ filtered_bs = bdrv_filtered_bs(bs);
+ if (blk_level && filtered_bs) {
+ /*
+ * Put any filtered child here (for backwards compatibility to when
+ * we put bs0->backing here, which might be any filtered child).
+ */
s->has_backing = true;
- s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level);
+ s->backing = bdrv_query_bds_stats(filtered_bs, blk_level);
}
return s;
diff --git a/tests/qemu-iotests/184.out b/tests/qemu-iotests/184.out
index 3deb3cfb94..1d61f7e224 100644
--- a/tests/qemu-iotests/184.out
+++ b/tests/qemu-iotests/184.out
@@ -27,6 +27,11 @@ Testing:
"iops_rd": 0,
"detect_zeroes": "off",
"image": {
+ "backing-image": {
+ "virtual-size": 1073741824,
+ "filename": "null-co://",
+ "format": "null-co"
+ },
"virtual-size": 1073741824,
"filename": "json:{\"throttle-group\": \"group0\", \"driver\":
\"throttle\", \"file\": {\"driver\": \"null-co\"}}",
"format": "throttle"
@@ -34,7 +39,7 @@ Testing:
"iops_wr": 0,
"ro": false,
"node-name": "throttle0",
- "backing_file_depth": 0,
+ "backing_file_depth": 1,
"drv": "throttle",
"iops": 0,
"bps_wr": 0,
--
2.21.0
