[PATCH v2 0/3] qemu-img: map: implement support for compressed clusters

[PATCH v2 0/3] qemu-img: map: implement support for compressed clusters

[Andrey Drobyshev via]

v1 --> v2:
  * Add vmdk format to the 1st commit.  Tweak commit message accordingly;
  * Make "compressed" field in MapEntry optional.

v1: https://lists.nongnu.org/archive/html/qemu-block/2023-06/msg00184.html

Andrey Drobyshev (3):
  block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()
  qemu-img: map: report compressed data blocks
  qemu-iotests: update expected tests output to contain "compressed"
    field

 block/qcow.c                                  |   5 +-
 block/qcow2.c                                 |   3 +
 block/vmdk.c                                  |   2 +
 include/block/block-common.h                  |   3 +
 qapi/block-core.json                          |   7 +-
 qemu-img.c                                    |  16 +-
 tests/qemu-iotests/122.out                    |  84 ++++----
 tests/qemu-iotests/154.out                    | 194 +++++++++---------
 tests/qemu-iotests/179.out                    | 178 ++++++++--------
 tests/qemu-iotests/244.out                    |  24 +--
 tests/qemu-iotests/252.out                    |  10 +-
 tests/qemu-iotests/274.out                    |  48 ++---
 .../tests/nbd-qemu-allocation.out             |   6 +-
 13 files changed, 302 insertions(+), 278 deletions(-)

-- 
2.39.3

[PATCH v2 1/3] block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()

[Andrey Drobyshev via]

Functions qcow2_get_host_offset(), get_cluster_offset(),
vmdk_co_block_status() explicitly report compressed cluster types when data
is compressed.  However, this information is never passed further.  Let's
make use of it by adding new BDRV_BLOCK_COMPRESSED flag for
bdrv_block_status(), so that caller may know that the data range is
compressed.  In particular, we're going to use this flag to tweak
"qemu-img map" output.

This new flag is only being utilized by qcow, qcow2 and vmdk formats, as only
those support compression.

Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
---
 block/qcow.c                 | 5 ++++-
 block/qcow2.c                | 3 +++
 block/vmdk.c                 | 2 ++
 include/block/block-common.h | 3 +++
 4 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/block/qcow.c b/block/qcow.c
index 577bd70324..d56d24ab6d 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -549,7 +549,10 @@ qcow_co_block_status(BlockDriverState *bs, bool want_zero,
     if (!cluster_offset) {
         return 0;
     }
-    if ((cluster_offset & QCOW_OFLAG_COMPRESSED) || s->crypto) {
+    if (cluster_offset & QCOW_OFLAG_COMPRESSED) {
+        return BDRV_BLOCK_DATA | BDRV_BLOCK_COMPRESSED;
+    }
+    if (s->crypto) {
         return BDRV_BLOCK_DATA;
     }
     *map = cluster_offset | index_in_cluster;
diff --git a/block/qcow2.c b/block/qcow2.c
index c51388e99d..77885fe27c 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2162,6 +2162,9 @@ qcow2_co_block_status(BlockDriverState *bs, bool want_zero, int64_t offset,
     {
         status |= BDRV_BLOCK_RECURSE;
     }
+    if (type == QCOW2_SUBCLUSTER_COMPRESSED) {
+        status |= BDRV_BLOCK_COMPRESSED;
+    }
     return status;
 }
 
diff --git a/block/vmdk.c b/block/vmdk.c
index 70066c2b01..56b3d5151d 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1770,6 +1770,8 @@ vmdk_co_block_status(BlockDriverState *bs, bool want_zero,
             if (extent->flat) {
                 ret |= BDRV_BLOCK_RECURSE;
             }
+        } else {
+            ret |= BDRV_BLOCK_COMPRESSED;
         }
         *file = extent->file->bs;
         break;
diff --git a/include/block/block-common.h b/include/block/block-common.h
index e15395f2cb..f7a4e7d4db 100644
--- a/include/block/block-common.h
+++ b/include/block/block-common.h
@@ -282,6 +282,8 @@ typedef enum {
  *                       layer rather than any backing, set by block layer
  * BDRV_BLOCK_EOF: the returned pnum covers through end of file for this
  *                 layer, set by block layer
+ * BDRV_BLOCK_COMPRESSED: the underlying data is compressed; only valid for
+ *                        the formats supporting compression: qcow, qcow2
  *
  * Internal flags:
  * BDRV_BLOCK_RAW: for use by passthrough drivers, such as raw, to request
@@ -317,6 +319,7 @@ typedef enum {
 #define BDRV_BLOCK_ALLOCATED    0x10
 #define BDRV_BLOCK_EOF          0x20
 #define BDRV_BLOCK_RECURSE      0x40
+#define BDRV_BLOCK_COMPRESSED   0x80
 
 typedef QTAILQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue;
 
-- 
2.39.3

Re: [PATCH v2 1/3] block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()

[Denis V. Lunev]

On 7/6/23 18:30, Andrey Drobyshev wrote:
> Functions qcow2_get_host_offset(), get_cluster_offset(),
> vmdk_co_block_status() explicitly report compressed cluster types when data
> is compressed.  However, this information is never passed further.  Let's
> make use of it by adding new BDRV_BLOCK_COMPRESSED flag for
> bdrv_block_status(), so that caller may know that the data range is
> compressed.  In particular, we're going to use this flag to tweak
> "qemu-img map" output.
>
> This new flag is only being utilized by qcow, qcow2 and vmdk formats, as only
> those support compression.
>
> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
> ---
>   block/qcow.c                 | 5 ++++-
>   block/qcow2.c                | 3 +++
>   block/vmdk.c                 | 2 ++
>   include/block/block-common.h | 3 +++
>   4 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/block/qcow.c b/block/qcow.c
> index 577bd70324..d56d24ab6d 100644
> --- a/block/qcow.c
> +++ b/block/qcow.c
> @@ -549,7 +549,10 @@ qcow_co_block_status(BlockDriverState *bs, bool want_zero,
>       if (!cluster_offset) {
>           return 0;
>       }
> -    if ((cluster_offset & QCOW_OFLAG_COMPRESSED) || s->crypto) {
> +    if (cluster_offset & QCOW_OFLAG_COMPRESSED) {
> +        return BDRV_BLOCK_DATA | BDRV_BLOCK_COMPRESSED;
> +    }
> +    if (s->crypto) {
>           return BDRV_BLOCK_DATA;
>       }
>       *map = cluster_offset | index_in_cluster;
> diff --git a/block/qcow2.c b/block/qcow2.c
> index c51388e99d..77885fe27c 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c
> @@ -2162,6 +2162,9 @@ qcow2_co_block_status(BlockDriverState *bs, bool want_zero, int64_t offset,
>       {
>           status |= BDRV_BLOCK_RECURSE;
>       }
> +    if (type == QCOW2_SUBCLUSTER_COMPRESSED) {
> +        status |= BDRV_BLOCK_COMPRESSED;
> +    }
>       return status;
>   }
>   
> diff --git a/block/vmdk.c b/block/vmdk.c
> index 70066c2b01..56b3d5151d 100644
> --- a/block/vmdk.c
> +++ b/block/vmdk.c
> @@ -1770,6 +1770,8 @@ vmdk_co_block_status(BlockDriverState *bs, bool want_zero,
>               if (extent->flat) {
>                   ret |= BDRV_BLOCK_RECURSE;
>               }
> +        } else {
> +            ret |= BDRV_BLOCK_COMPRESSED;
>           }
>           *file = extent->file->bs;
>           break;
> diff --git a/include/block/block-common.h b/include/block/block-common.h
> index e15395f2cb..f7a4e7d4db 100644
> --- a/include/block/block-common.h
> +++ b/include/block/block-common.h
> @@ -282,6 +282,8 @@ typedef enum {
>    *                       layer rather than any backing, set by block layer
>    * BDRV_BLOCK_EOF: the returned pnum covers through end of file for this
>    *                 layer, set by block layer
> + * BDRV_BLOCK_COMPRESSED: the underlying data is compressed; only valid for
> + *                        the formats supporting compression: qcow, qcow2
>    *
>    * Internal flags:
>    * BDRV_BLOCK_RAW: for use by passthrough drivers, such as raw, to request
> @@ -317,6 +319,7 @@ typedef enum {
>   #define BDRV_BLOCK_ALLOCATED    0x10
>   #define BDRV_BLOCK_EOF          0x20
>   #define BDRV_BLOCK_RECURSE      0x40
> +#define BDRV_BLOCK_COMPRESSED   0x80
>   
>   typedef QTAILQ_HEAD(BlockReopenQueue, BlockReopenQueueEntry) BlockReopenQueue;
>   
Reviewed-by: Denis V. Lunev <den@openvz.org>

Re: [PATCH v2 1/3] block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()

[Hanna Czenczek]

On 06.07.23 18:30, Andrey Drobyshev wrote:
> Functions qcow2_get_host_offset(), get_cluster_offset(),
> vmdk_co_block_status() explicitly report compressed cluster types when data
> is compressed.  However, this information is never passed further.  Let's
> make use of it by adding new BDRV_BLOCK_COMPRESSED flag for
> bdrv_block_status(), so that caller may know that the data range is
> compressed.  In particular, we're going to use this flag to tweak
> "qemu-img map" output.
>
> This new flag is only being utilized by qcow, qcow2 and vmdk formats, as only
> those support compression.
>
> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
> ---
>   block/qcow.c                 | 5 ++++-
>   block/qcow2.c                | 3 +++
>   block/vmdk.c                 | 2 ++
>   include/block/block-common.h | 3 +++
>   4 files changed, 12 insertions(+), 1 deletion(-)

Reviewed-by: Hanna Czenczek <hreitz@redhat.com>

[PATCH v2 2/3] qemu-img: map: report compressed data blocks

[Andrey Drobyshev via]

Right now "qemu-img map" reports compressed blocks as containing data
but having no host offset.  This is not very informative.  Instead,
let's add another boolean field named "compressed" in case JSON output
mode is specified.  This is achieved by utilizing new allocation status
flag BDRV_BLOCK_COMPRESSED for bdrv_block_status().

Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
---
 qapi/block-core.json |  7 +++++--
 qemu-img.c           | 16 +++++++++++++---
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/qapi/block-core.json b/qapi/block-core.json
index 5dd5f7e4b0..b263d2cd30 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -409,6 +409,9 @@
 #
 # @zero: whether the virtual blocks read as zeroes
 #
+# @compressed: true indicates that data is stored compressed.  Optional,
+#     only valid for the formats whith support compression
+#
 # @depth: number of layers (0 = top image, 1 = top image's backing
 #     file, ..., n - 1 = bottom image (where n is the number of images
 #     in the chain)) before reaching one for which the range is
@@ -426,8 +429,8 @@
 ##
 { 'struct': 'MapEntry',
   'data': {'start': 'int', 'length': 'int', 'data': 'bool',
-           'zero': 'bool', 'depth': 'int', 'present': 'bool',
-           '*offset': 'int', '*filename': 'str' } }
+           'zero': 'bool', '*compressed': 'bool', 'depth': 'int',
+           'present': 'bool', '*offset': 'int', '*filename': 'str' } }
 
 ##
 # @BlockdevCacheInfo:
diff --git a/qemu-img.c b/qemu-img.c
index 27f48051b0..9bb69f58f6 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -3083,7 +3083,7 @@ static int img_info(int argc, char **argv)
 }
 
 static int dump_map_entry(OutputFormat output_format, MapEntry *e,
-                          MapEntry *next)
+                          MapEntry *next, bool can_compress)
 {
     switch (output_format) {
     case OFORMAT_HUMAN:
@@ -3112,6 +3112,9 @@ static int dump_map_entry(OutputFormat output_format, MapEntry *e,
                e->present ? "true" : "false",
                e->zero ? "true" : "false",
                e->data ? "true" : "false");
+        if (can_compress) {
+            printf(", \"compressed\": %s", e->compressed ? "true" : "false");
+        }
         if (e->has_offset) {
             printf(", \"offset\": %"PRId64"", e->offset);
         }
@@ -3172,6 +3175,7 @@ static int get_block_status(BlockDriverState *bs, int64_t offset,
         .length = bytes,
         .data = !!(ret & BDRV_BLOCK_DATA),
         .zero = !!(ret & BDRV_BLOCK_ZERO),
+        .compressed = !!(ret & BDRV_BLOCK_COMPRESSED),
         .offset = map,
         .has_offset = has_offset,
         .depth = depth,
@@ -3189,6 +3193,7 @@ static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next)
     }
     if (curr->zero != next->zero ||
         curr->data != next->data ||
+        curr->compressed != next->compressed ||
         curr->depth != next->depth ||
         curr->present != next->present ||
         !curr->filename != !next->filename ||
@@ -3218,6 +3223,7 @@ static int img_map(int argc, char **argv)
     bool force_share = false;
     int64_t start_offset = 0;
     int64_t max_length = -1;
+    bool can_compress = false;
 
     fmt = NULL;
     output = NULL;
@@ -3313,6 +3319,10 @@ static int img_map(int argc, char **argv)
         length = MIN(start_offset + max_length, length);
     }
 
+    if (output_format == OFORMAT_JSON) {
+        can_compress = block_driver_can_compress(bs->drv);
+    }
+
     curr.start = start_offset;
     while (curr.start + curr.length < length) {
         int64_t offset = curr.start + curr.length;
@@ -3330,7 +3340,7 @@ static int img_map(int argc, char **argv)
         }
 
         if (curr.length > 0) {
-            ret = dump_map_entry(output_format, &curr, &next);
+            ret = dump_map_entry(output_format, &curr, &next, can_compress);
             if (ret < 0) {
                 goto out;
             }
@@ -3338,7 +3348,7 @@ static int img_map(int argc, char **argv)
         curr = next;
     }
 
-    ret = dump_map_entry(output_format, &curr, NULL);
+    ret = dump_map_entry(output_format, &curr, NULL, can_compress);
     if (output_format == OFORMAT_JSON) {
         puts("]");
     }
-- 
2.39.3

Re: [PATCH v2 2/3] qemu-img: map: report compressed data blocks

[Denis V. Lunev]

On 7/6/23 18:30, Andrey Drobyshev wrote:
> Right now "qemu-img map" reports compressed blocks as containing data
> but having no host offset.  This is not very informative.  Instead,
> let's add another boolean field named "compressed" in case JSON output
> mode is specified.  This is achieved by utilizing new allocation status
> flag BDRV_BLOCK_COMPRESSED for bdrv_block_status().
>
> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
> ---
>   qapi/block-core.json |  7 +++++--
>   qemu-img.c           | 16 +++++++++++++---
>   2 files changed, 18 insertions(+), 5 deletions(-)
>
> diff --git a/qapi/block-core.json b/qapi/block-core.json
> index 5dd5f7e4b0..b263d2cd30 100644
> --- a/qapi/block-core.json
> +++ b/qapi/block-core.json
> @@ -409,6 +409,9 @@
>   #
>   # @zero: whether the virtual blocks read as zeroes
>   #
> +# @compressed: true indicates that data is stored compressed.  Optional,
> +#     only valid for the formats whith support compression
> +#
>   # @depth: number of layers (0 = top image, 1 = top image's backing
>   #     file, ..., n - 1 = bottom image (where n is the number of images
>   #     in the chain)) before reaching one for which the range is
> @@ -426,8 +429,8 @@
>   ##
>   { 'struct': 'MapEntry',
>     'data': {'start': 'int', 'length': 'int', 'data': 'bool',
> -           'zero': 'bool', 'depth': 'int', 'present': 'bool',
> -           '*offset': 'int', '*filename': 'str' } }
> +           'zero': 'bool', '*compressed': 'bool', 'depth': 'int',
> +           'present': 'bool', '*offset': 'int', '*filename': 'str' } }
>   
>   ##
>   # @BlockdevCacheInfo:
> diff --git a/qemu-img.c b/qemu-img.c
> index 27f48051b0..9bb69f58f6 100644
> --- a/qemu-img.c
> +++ b/qemu-img.c
> @@ -3083,7 +3083,7 @@ static int img_info(int argc, char **argv)
>   }
>   
>   static int dump_map_entry(OutputFormat output_format, MapEntry *e,
> -                          MapEntry *next)
> +                          MapEntry *next, bool can_compress)
>   {
>       switch (output_format) {
>       case OFORMAT_HUMAN:
> @@ -3112,6 +3112,9 @@ static int dump_map_entry(OutputFormat output_format, MapEntry *e,
>                  e->present ? "true" : "false",
>                  e->zero ? "true" : "false",
>                  e->data ? "true" : "false");
> +        if (can_compress) {
> +            printf(", \"compressed\": %s", e->compressed ? "true" : "false");
> +        }
>           if (e->has_offset) {
>               printf(", \"offset\": %"PRId64"", e->offset);
>           }
> @@ -3172,6 +3175,7 @@ static int get_block_status(BlockDriverState *bs, int64_t offset,
>           .length = bytes,
>           .data = !!(ret & BDRV_BLOCK_DATA),
>           .zero = !!(ret & BDRV_BLOCK_ZERO),
> +        .compressed = !!(ret & BDRV_BLOCK_COMPRESSED),
>           .offset = map,
>           .has_offset = has_offset,
>           .depth = depth,
> @@ -3189,6 +3193,7 @@ static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next)
>       }
>       if (curr->zero != next->zero ||
>           curr->data != next->data ||
> +        curr->compressed != next->compressed ||
>           curr->depth != next->depth ||
>           curr->present != next->present ||
>           !curr->filename != !next->filename ||
> @@ -3218,6 +3223,7 @@ static int img_map(int argc, char **argv)
>       bool force_share = false;
>       int64_t start_offset = 0;
>       int64_t max_length = -1;
> +    bool can_compress = false;
>   
>       fmt = NULL;
>       output = NULL;
> @@ -3313,6 +3319,10 @@ static int img_map(int argc, char **argv)
>           length = MIN(start_offset + max_length, length);
>       }
>   
> +    if (output_format == OFORMAT_JSON) {
> +        can_compress = block_driver_can_compress(bs->drv);
> +    }
> +
>       curr.start = start_offset;
>       while (curr.start + curr.length < length) {
>           int64_t offset = curr.start + curr.length;
> @@ -3330,7 +3340,7 @@ static int img_map(int argc, char **argv)
>           }
>   
>           if (curr.length > 0) {
> -            ret = dump_map_entry(output_format, &curr, &next);
> +            ret = dump_map_entry(output_format, &curr, &next, can_compress);
>               if (ret < 0) {
>                   goto out;
>               }
> @@ -3338,7 +3348,7 @@ static int img_map(int argc, char **argv)
>           curr = next;
>       }
>   
> -    ret = dump_map_entry(output_format, &curr, NULL);
> +    ret = dump_map_entry(output_format, &curr, NULL, can_compress);
>       if (output_format == OFORMAT_JSON) {
>           puts("]");
>       }
Reviewed-by: Denis V. Lunev <den@openvz.org>

Re: [PATCH v2 2/3] qemu-img: map: report compressed data blocks

[Hanna Czenczek]

On 06.07.23 18:30, Andrey Drobyshev wrote:
> Right now "qemu-img map" reports compressed blocks as containing data
> but having no host offset.  This is not very informative.  Instead,
> let's add another boolean field named "compressed" in case JSON output
> mode is specified.  This is achieved by utilizing new allocation status
> flag BDRV_BLOCK_COMPRESSED for bdrv_block_status().
>
> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
> ---
>   qapi/block-core.json |  7 +++++--
>   qemu-img.c           | 16 +++++++++++++---
>   2 files changed, 18 insertions(+), 5 deletions(-)

Patch 3 must be merged into this patch.  Every test must pass on every 
commit so we don’t break bisecting.

> diff --git a/qapi/block-core.json b/qapi/block-core.json
> index 5dd5f7e4b0..b263d2cd30 100644
> --- a/qapi/block-core.json
> +++ b/qapi/block-core.json
> @@ -409,6 +409,9 @@
>   #
>   # @zero: whether the virtual blocks read as zeroes
>   #
> +# @compressed: true indicates that data is stored compressed.  Optional,
> +#     only valid for the formats whith support compression

This is missing information for when this field was introduced (i.e. a 
“(since 8.2)”).

I also wonder why this field is optional.  We have compression 
information even for formats that don’t support compression, 
specifically, nothing is compressed.  I would just make this field 
mandatory and print it always.  (A technical reason to do so is that 
this patch uses block_driver_can_compress() to figure out whether there 
is compression support; but that function only tells whether the driver 
can write compressed data.  Even if it cannot do that, the format may 
still support compression, and the driver may be able to read compressed 
data, just not write it.)

Hanna

> +#
>   # @depth: number of layers (0 = top image, 1 = top image's backing
>   #     file, ..., n - 1 = bottom image (where n is the number of images
>   #     in the chain)) before reaching one for which the range is
> @@ -426,8 +429,8 @@

Re: [PATCH v2 2/3] qemu-img: map: report compressed data blocks

[Andrey Drobyshev]

On 8/25/23 17:14, Hanna Czenczek wrote:
> On 06.07.23 18:30, Andrey Drobyshev wrote:
>> Right now "qemu-img map" reports compressed blocks as containing data
>> but having no host offset.  This is not very informative.  Instead,
>> let's add another boolean field named "compressed" in case JSON output
>> mode is specified.  This is achieved by utilizing new allocation status
>> flag BDRV_BLOCK_COMPRESSED for bdrv_block_status().
>>
>> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
>> ---
>>   qapi/block-core.json |  7 +++++--
>>   qemu-img.c           | 16 +++++++++++++---
>>   2 files changed, 18 insertions(+), 5 deletions(-)
> 
> Patch 3 must be merged into this patch.  Every test must pass on every
> commit so we don’t break bisecting.

Agreed, should've figured that myself.

> 
>> diff --git a/qapi/block-core.json b/qapi/block-core.json
>> index 5dd5f7e4b0..b263d2cd30 100644
>> --- a/qapi/block-core.json
>> +++ b/qapi/block-core.json
>> @@ -409,6 +409,9 @@
>>   #
>>   # @zero: whether the virtual blocks read as zeroes
>>   #
>> +# @compressed: true indicates that data is stored compressed.  Optional,
>> +#     only valid for the formats whith support compression
> 
> This is missing information for when this field was introduced (i.e. a
> “(since 8.2)”).

Noted.

> 
> I also wonder why this field is optional.  We have compression
> information even for formats that don’t support compression,
> specifically, nothing is compressed.  I would just make this field
> mandatory and print it always.  (A technical reason to do so is that
> this patch uses block_driver_can_compress() to figure out whether there
> is compression support; but that function only tells whether the driver
> can write compressed data.  Even if it cannot do that, the format may
> still support compression, and the driver may be able to read compressed
> data, just not write it.)
> 

I figured that for the formats which surely can't support compression,
such as "raw", this information would simply be redundant.  AFAICT right
now the only drivers which can read compressed data are exactly the ones
which can write it: vmdk, qcow and qcow2.  But if we assume that this
might change, and that we'd better show the field value no matter what
(as we do with "zero" field) -- I'm OK with it.

Re: [PATCH v2 2/3] qemu-img: map: report compressed data blocks

[Hanna Czenczek]

On 29.08.23 08:44, Andrey Drobyshev wrote:
> On 8/25/23 17:14, Hanna Czenczek wrote:
>> On 06.07.23 18:30, Andrey Drobyshev wrote:
>>> Right now "qemu-img map" reports compressed blocks as containing data
>>> but having no host offset.  This is not very informative.  Instead,
>>> let's add another boolean field named "compressed" in case JSON output
>>> mode is specified.  This is achieved by utilizing new allocation status
>>> flag BDRV_BLOCK_COMPRESSED for bdrv_block_status().
>>>
>>> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
>>> ---
>>>    qapi/block-core.json |  7 +++++--
>>>    qemu-img.c           | 16 +++++++++++++---
>>>    2 files changed, 18 insertions(+), 5 deletions(-)
>> Patch 3 must be merged into this patch.  Every test must pass on every
>> commit so we don’t break bisecting.
> Agreed, should've figured that myself.
>
>>> diff --git a/qapi/block-core.json b/qapi/block-core.json
>>> index 5dd5f7e4b0..b263d2cd30 100644
>>> --- a/qapi/block-core.json
>>> +++ b/qapi/block-core.json
>>> @@ -409,6 +409,9 @@
>>>    #
>>>    # @zero: whether the virtual blocks read as zeroes
>>>    #
>>> +# @compressed: true indicates that data is stored compressed.  Optional,
>>> +#     only valid for the formats whith support compression
>> This is missing information for when this field was introduced (i.e. a
>> “(since 8.2)”).
> Noted.
>
>> I also wonder why this field is optional.  We have compression
>> information even for formats that don’t support compression,
>> specifically, nothing is compressed.  I would just make this field
>> mandatory and print it always.  (A technical reason to do so is that
>> this patch uses block_driver_can_compress() to figure out whether there
>> is compression support; but that function only tells whether the driver
>> can write compressed data.  Even if it cannot do that, the format may
>> still support compression, and the driver may be able to read compressed
>> data, just not write it.)
>>
> I figured that for the formats which surely can't support compression,
> such as "raw", this information would simply be redundant.  AFAICT right
> now the only drivers which can read compressed data are exactly the ones
> which can write it: vmdk, qcow and qcow2.  But if we assume that this
> might change, and that we'd better show the field value no matter what
> (as we do with "zero" field) -- I'm OK with it.

It is indeed redundant, but as this is intended to be the 
machine-readable output, I don’t mind the output becoming arguably 
needlessly verbose.

[PATCH v2 3/3] qemu-iotests: update expected tests output to contain "compressed" field

[Andrey Drobyshev via]

The previous commit adds "compressed" boolean field to JSON output of
"qemu-img map" command.  Let's tweak expected tests output accordingly.

Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
---
 tests/qemu-iotests/122.out                    |  84 ++++----
 tests/qemu-iotests/154.out                    | 194 +++++++++---------
 tests/qemu-iotests/179.out                    | 178 ++++++++--------
 tests/qemu-iotests/244.out                    |  24 +--
 tests/qemu-iotests/252.out                    |  10 +-
 tests/qemu-iotests/274.out                    |  48 ++---
 .../tests/nbd-qemu-allocation.out             |   6 +-
 7 files changed, 272 insertions(+), 272 deletions(-)

diff --git a/tests/qemu-iotests/122.out b/tests/qemu-iotests/122.out
index e18766e167..6a1aa3fe2b 100644
--- a/tests/qemu-iotests/122.out
+++ b/tests/qemu-iotests/122.out
@@ -67,12 +67,12 @@ read 65536/65536 bytes at offset 4194304
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 65536/65536 bytes at offset 8388608
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 65536, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 4194304, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 4259840, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 8388608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 8454144, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 65536, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 4259840, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 8454144, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 read 65536/65536 bytes at offset 0
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 65536/65536 bytes at offset 4194304
@@ -94,12 +94,12 @@ wrote 1024/1024 bytes at offset 1046528
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 1024/1024 bytes at offset 0
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 65536, "length": 65536, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 131072, "length": 196608, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 327680, "length": 655360, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 983040, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 1048576, "length": 1046528, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 65536, "length": 65536, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 131072, "length": 196608, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 327680, "length": 655360, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 983040, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 1048576, "length": 1046528, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 read 16384/16384 bytes at offset 0
 16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 16384/16384 bytes at offset 16384
@@ -130,14 +130,14 @@ read 3145728/3145728 bytes at offset 0
 3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 63963136/63963136 bytes at offset 3145728
 61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
 
 convert -c -S 0:
 read 3145728/3145728 bytes at offset 0
 3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 63963136/63963136 bytes at offset 3145728
 61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true}]
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
 wrote 33554432/33554432 bytes at offset 0
 32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -152,7 +152,7 @@ read 30408704/30408704 bytes at offset 3145728
 29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 33554432/33554432 bytes at offset 33554432
 32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
 
 convert -c -S 0 with source backing file:
 read 3145728/3145728 bytes at offset 0
@@ -161,7 +161,7 @@ read 30408704/30408704 bytes at offset 3145728
 29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 33554432/33554432 bytes at offset 33554432
 32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true}]
 
 convert -S 0 -B ...
 read 3145728/3145728 bytes at offset 0
@@ -170,7 +170,7 @@ read 30408704/30408704 bytes at offset 3145728
 29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 33554432/33554432 bytes at offset 33554432
 32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
 
 convert -c -S 0 -B ...
 read 3145728/3145728 bytes at offset 0
@@ -179,7 +179,7 @@ read 30408704/30408704 bytes at offset 3145728
 29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 33554432/33554432 bytes at offset 33554432
 32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true}]
 
 === Non-zero -S ===
 
@@ -196,32 +196,32 @@ wrote 1024/1024 bytes at offset 66560
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
 convert -S 4k
-[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 4096, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 12288, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 20480, "length": 67088384, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 4096, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 12288, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 20480, "length": 67088384, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 convert -c -S 4k
-[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 convert -S 8k
-[{ "start": 0, "length": 24576, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 24576, "length": 67084288, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 24576, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 24576, "length": 67084288, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 convert -c -S 8k
-[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
-{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
+{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 === -n to a non-zero image ===
 
@@ -235,18 +235,18 @@ Images are identical.
 
 Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
-[{ "start": 0, "length": 67108864, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 === -n to an empty image with a backing file ===
 
 Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
-[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
+[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
 
 === -n -B to an image without a backing file ===
 
diff --git a/tests/qemu-iotests/154.out b/tests/qemu-iotests/154.out
index 1fa7ffc475..0199269add 100644
--- a/tests/qemu-iotests/154.out
+++ b/tests/qemu-iotests/154.out
@@ -11,14 +11,14 @@ wrote 2048/2048 bytes at offset 17408
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 2048/2048 bytes at offset 27648
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4096, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 12288, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 20480, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 24576, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4096, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 12288, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 20480, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 24576, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == backing file contains non-zero data before write_zeroes ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -41,11 +41,11 @@ read 1024/1024 bytes at offset 65536
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 2048/2048 bytes at offset 67584
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 36864, "length": 28672, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 69632, "length": 134148096, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 36864, "length": 28672, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 69632, "length": 134148096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == backing file contains non-zero data after write_zeroes ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -68,11 +68,11 @@ read 1024/1024 bytes at offset 44032
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 3072/3072 bytes at offset 40960
 3 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 36864, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 40960, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 45056, "length": 134172672, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 36864, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 40960, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 45056, "length": 134172672, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == write_zeroes covers non-zero data ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -101,15 +101,15 @@ wrote 2048/2048 bytes at offset 29696
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 4096/4096 bytes at offset 28672
 4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 4096, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 8192, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 12288, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 16384, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 20480, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 24576, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 28672, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 4096, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 8192, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 12288, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 16384, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 20480, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 24576, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 28672, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == spanning two clusters, non-zero before request ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -142,16 +142,16 @@ read 1024/1024 bytes at offset 67584
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 5120/5120 bytes at offset 68608
 5 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == spanning two clusters, non-zero after request ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -184,16 +184,16 @@ read 7168/7168 bytes at offset 65536
 7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 1024/1024 bytes at offset 72704
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == spanning two clusters, partially overwriting backing file ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -212,8 +212,8 @@ read 1024/1024 bytes at offset 5120
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 2048/2048 bytes at offset 6144
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 8192, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 8192, "length": 134209536, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 8192, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 8192, "length": 134209536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == spanning multiple clusters, non-zero in first cluster ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -226,10 +226,10 @@ read 2048/2048 bytes at offset 65536
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 10240/10240 bytes at offset 67584
 10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 69632, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 69632, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == spanning multiple clusters, non-zero in intermediate cluster ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -240,9 +240,9 @@ wrote 7168/7168 bytes at offset 67584
 7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 12288/12288 bytes at offset 65536
 12 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 65536, "length": 12288, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 65536, "length": 12288, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == spanning multiple clusters, non-zero in final cluster ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -255,10 +255,10 @@ read 10240/10240 bytes at offset 65536
 10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 2048/2048 bytes at offset 75776
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 65536, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 65536, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == spanning multiple clusters, partially overwriting backing file ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
@@ -277,88 +277,88 @@ read 2048/2048 bytes at offset 74752
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 1024/1024 bytes at offset 76800
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 
 == unaligned image tail cluster, no allocation needed ==
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
 wrote 512/512 bytes at offset 134217728
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
 wrote 512/512 bytes at offset 134219264
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
 wrote 1024/1024 bytes at offset 134218240
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
 wrote 2048/2048 bytes at offset 134217728
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 512/512 bytes at offset 134217728
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 512/512 bytes at offset 134219264
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 1024/1024 bytes at offset 134218240
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 2048/2048 bytes at offset 134217728
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 wrote 512/512 bytes at offset 134217728
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 512/512 bytes at offset 134217728
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 512/512 bytes at offset 134219264
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 1024/1024 bytes at offset 134218240
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 2048/2048 bytes at offset 134217728
 2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 2048/2048 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134218752
 wrote 1024/1024 bytes at offset 134217728
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -369,15 +369,15 @@ read 512/512 bytes at offset 134217728
 read 512/512 bytes at offset 134218240
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 1024/1024 bytes allocated at offset 128 MiB
-[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
+[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
 wrote 1024/1024 bytes at offset 134217728
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 1024/1024 bytes allocated at offset 128 MiB
 read 1024/1024 bytes at offset 134217728
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET}]
+[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET}]
 
 == unaligned image tail cluster, allocation required ==
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752
@@ -390,8 +390,8 @@ read 512/512 bytes at offset 134217728
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 1536/1536 bytes at offset 134218240
 1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
 Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752
 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
 wrote 512/512 bytes at offset 134218240
@@ -412,6 +412,6 @@ read 512/512 bytes at offset 134218240
 512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 read 1024/1024 bytes at offset 134218752
 1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
+[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
 *** done
diff --git a/tests/qemu-iotests/179.out b/tests/qemu-iotests/179.out
index 7cf22cd75f..65b909ebc2 100644
--- a/tests/qemu-iotests/179.out
+++ b/tests/qemu-iotests/179.out
@@ -13,11 +13,11 @@ wrote 2097152/2097152 bytes at offset 6291456
 2 MiB (0x200000) bytes not allocated at offset 4 MiB (0x400000)
 2 MiB (0x200000) bytes     allocated at offset 6 MiB (0x600000)
 56 MiB (0x3800000) bytes not allocated at offset 8 MiB (0x800000)
-[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 8388608, "length": 58720256, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 58720256, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 wrote 2097150/2097150 bytes at offset 10485761
 2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 2097150/2097150 bytes at offset 14680065
@@ -31,15 +31,15 @@ wrote 2097150/2097150 bytes at offset 14680065
 2 MiB (0x200000) bytes not allocated at offset 12 MiB (0xc00000)
 2 MiB (0x200000) bytes     allocated at offset 14 MiB (0xe00000)
 48 MiB (0x3000000) bytes not allocated at offset 16 MiB (0x1000000)
-[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 16777216, "length": 50331648, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 16777216, "length": 50331648, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 wrote 14680064/14680064 bytes at offset 18874368
 14 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 2097152/2097152 bytes at offset 20971520
@@ -57,21 +57,21 @@ wrote 6291456/6291456 bytes at offset 25165824
 2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000)
 14 MiB (0xe00000) bytes     allocated at offset 18 MiB (0x1200000)
 32 MiB (0x2000000) bytes not allocated at offset 32 MiB (0x2000000)
-[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 25165824, "length": 6291456, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 25165824, "length": 6291456, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
+{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 wrote 2097152/2097152 bytes at offset 27262976
 2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 2097152/2097152 bytes at offset 29360128
@@ -87,23 +87,23 @@ wrote 2097152/2097152 bytes at offset 29360128
 2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000)
 14 MiB (0xe00000) bytes     allocated at offset 18 MiB (0x1200000)
 32 MiB (0x2000000) bytes not allocated at offset 32 MiB (0x2000000)
-[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
+{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
+{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 wrote 8388608/8388608 bytes at offset 33554432
 8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 2097152/2097152 bytes at offset 35651584
@@ -121,24 +121,24 @@ wrote 2097152/2097152 bytes at offset 37748736
 2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000)
 22 MiB (0x1600000) bytes     allocated at offset 18 MiB (0x1200000)
 24 MiB (0x1800000) bytes not allocated at offset 40 MiB (0x2800000)
-[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 33554432, "length": 8388608, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 41943040, "length": 25165824, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
+{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
+{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 33554432, "length": 8388608, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 41943040, "length": 25165824, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 wrote 8388608/8388608 bytes at offset 41943040
 8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 wrote 8388608/8388608 bytes at offset 50331648
@@ -162,31 +162,31 @@ wrote 2097152/2097152 bytes at offset 62914560
 4 MiB (0x400000) bytes not allocated at offset 54 MiB (0x3600000)
 4 MiB (0x400000) bytes     allocated at offset 58 MiB (0x3a00000)
 2 MiB (0x200000) bytes not allocated at offset 62 MiB (0x3e00000)
-[{ "start": 0, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 2097152, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 6291456, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 8388608, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 10485760, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 12582912, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 14680064, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 16777216, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 18874368, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 20971520, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 23068672, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 25165824, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 27262976, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 29360128, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 31457280, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 33554432, "length": 10485760, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 44040192, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 48234496, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
-{ "start": 50331648, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 52428800, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 56623104, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 58720256, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 60817408, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 65011712, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 2097152, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 6291456, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 10485760, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 12582912, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 14680064, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 16777216, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 18874368, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 20971520, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 23068672, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 25165824, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
+{ "start": 27262976, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 29360128, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
+{ "start": 31457280, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 33554432, "length": 10485760, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 44040192, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 48234496, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 50331648, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 52428800, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 56623104, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 58720256, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 60817408, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 65011712, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 No errors were found on the image.
 No errors were found on the image.
 
diff --git a/tests/qemu-iotests/244.out b/tests/qemu-iotests/244.out
index 5e03add054..38ffbd7e1e 100644
--- a/tests/qemu-iotests/244.out
+++ b/tests/qemu-iotests/244.out
@@ -57,12 +57,12 @@ wrote 3145728/3145728 bytes at offset 3145728
 3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 No errors were found on the image.
 
-[{ "start": 0, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false},
-{ "start": 1048576, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "offset": 1048576},
-{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false, "offset": 4194304},
-{ "start": 5242880, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 6291456, "length": 60817408, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 1048576, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 1048576},
+{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 4194304},
+{ "start": 5242880, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 6291456, "length": 60817408, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 read 1048576/1048576 bytes at offset 0
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -94,10 +94,10 @@ wrote 3145728/3145728 bytes at offset 3145728
 3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 No errors were found on the image.
 
-[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": 0},
-{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 4194304, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": 4194304},
-{ "start": 6291456, "length": 60817408, "depth": 0, "present": true, "zero": false, "data": true, "offset": 6291456}]
+[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 0},
+{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 4194304, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 4194304},
+{ "start": 6291456, "length": 60817408, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 6291456}]
 
 read 1048576/1048576 bytes at offset 0
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -123,8 +123,8 @@ read 1048576/1048576 bytes at offset 0
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 Offset          Length          Mapped to       File
 0               0x100000        0               TEST_DIR/t.qcow2.data
-[{ "start": 0, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "offset": 0},
-{ "start": 1048576, "length": 66060288, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 0},
+{ "start": 1048576, "length": 66060288, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 === Copy offloading ===
 
diff --git a/tests/qemu-iotests/252.out b/tests/qemu-iotests/252.out
index c578129c25..b1aa94cb05 100644
--- a/tests/qemu-iotests/252.out
+++ b/tests/qemu-iotests/252.out
@@ -23,8 +23,8 @@ read 131072/131072 bytes at offset 131072
 read 131072/131072 bytes at offset 262144
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
-[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 262144, "length": 131072, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 262144, "length": 131072, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 read 131072/131072 bytes at offset 0
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -33,7 +33,7 @@ read 131072/131072 bytes at offset 131072
 read 131072/131072 bytes at offset 262144
 128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
-[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 262144, "length": 65536, "depth": 0, "present": true, "zero": true, "data": false},
-{ "start": 327680, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
+{ "start": 262144, "length": 65536, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
+{ "start": 327680, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 *** done
diff --git a/tests/qemu-iotests/274.out b/tests/qemu-iotests/274.out
index acd8b166a6..c2967335ca 100644
--- a/tests/qemu-iotests/274.out
+++ b/tests/qemu-iotests/274.out
@@ -20,18 +20,18 @@ read 1048576/1048576 bytes at offset 1048576
 0/1048576 bytes allocated at offset 1 MiB
 
 === Checking map ===
-[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
+[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
 
 Offset          Length          Mapped to       File
 0               0x200000        0x50000         TEST_DIR/PID-base
 
-[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "offset": 327680}]
+[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
 
 Offset          Length          Mapped to       File
 0               0x100000        0x50000         TEST_DIR/PID-base
 
-[{ "start": 0, "length": 1048576, "depth": 2, "present": true, "zero": false, "data": true, "offset": 327680},
-{ "start": 1048576, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 1048576, "depth": 2, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
+{ "start": 1048576, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
 
 Offset          Length          Mapped to       File
 0               0x100000        0x50000         TEST_DIR/PID-base
@@ -186,8 +186,8 @@ read 65536/65536 bytes at offset 5368709120
 1 GiB (0x40000000) bytes not allocated at offset 0 bytes (0x0)
 7 GiB (0x1c0000000) bytes     allocated at offset 1 GiB (0x40000000)
 
-[{ "start": 0, "length": 1073741824, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 1073741824, "length": 7516192768, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 1073741824, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 1073741824, "length": 7516192768, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 
 === preallocation=metadata ===
 wrote 65536/65536 bytes at offset 33285996544
@@ -201,13 +201,13 @@ read 65536/65536 bytes at offset 33285996544
 30 GiB (0x780000000) bytes not allocated at offset 0 bytes (0x0)
 3 GiB (0xc0000000) bytes     allocated at offset 30 GiB (0x780000000)
 
-[{ "start": 0, "length": 32212254720, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 32212254720, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 327680},
-{ "start": 32749125632, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 537264128},
-{ "start": 33285996544, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 1074200576},
-{ "start": 33822867456, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 1611137024},
-{ "start": 34359738368, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 2148139008},
-{ "start": 34896609280, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 2685075456}]
+[{ "start": 0, "length": 32212254720, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 32212254720, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 327680},
+{ "start": 32749125632, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 537264128},
+{ "start": 33285996544, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 1074200576},
+{ "start": 33822867456, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 1611137024},
+{ "start": 34359738368, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 2148139008},
+{ "start": 34896609280, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 2685075456}]
 
 === preallocation=falloc ===
 wrote 65536/65536 bytes at offset 9437184
@@ -221,8 +221,8 @@ read 65536/65536 bytes at offset 9437184
 5 MiB (0x500000) bytes not allocated at offset 0 bytes (0x0)
 10 MiB (0xa00000) bytes     allocated at offset 5 MiB (0x500000)
 
-[{ "start": 0, "length": 5242880, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 5242880, "length": 10485760, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
+[{ "start": 0, "length": 5242880, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 5242880, "length": 10485760, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
 
 === preallocation=full ===
 wrote 65536/65536 bytes at offset 11534336
@@ -236,8 +236,8 @@ read 65536/65536 bytes at offset 11534336
 8 MiB (0x800000) bytes not allocated at offset 0 bytes (0x0)
 4 MiB (0x400000) bytes     allocated at offset 8 MiB (0x800000)
 
-[{ "start": 0, "length": 8388608, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 8388608, "length": 4194304, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
+[{ "start": 0, "length": 8388608, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 8388608, "length": 4194304, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
 
 === preallocation=off ===
 wrote 65536/65536 bytes at offset 259072
@@ -251,9 +251,9 @@ read 65536/65536 bytes at offset 259072
 192 KiB (0x30000) bytes not allocated at offset 0 bytes (0x0)
 320 KiB (0x50000) bytes     allocated at offset 192 KiB (0x30000)
 
-[{ "start": 0, "length": 196608, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 196608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680},
-{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 196608, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 196608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
+{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 
 === preallocation=off ===
 wrote 65536/65536 bytes at offset 344064
@@ -267,8 +267,8 @@ read 65536/65536 bytes at offset 344064
 256 KiB (0x40000) bytes not allocated at offset 0 bytes (0x0)
 256 KiB (0x40000) bytes     allocated at offset 256 KiB (0x40000)
 
-[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 
 === preallocation=off ===
 wrote 65536/65536 bytes at offset 446464
@@ -282,6 +282,6 @@ read 65536/65536 bytes at offset 446464
 256 KiB (0x40000) bytes not allocated at offset 0 bytes (0x0)
 244 KiB (0x3d000) bytes     allocated at offset 256 KiB (0x40000)
 
-[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false},
-{ "start": 262144, "length": 249856, "depth": 0, "present": true, "zero": true, "data": false}]
+[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
+{ "start": 262144, "length": 249856, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
 
diff --git a/tests/qemu-iotests/tests/nbd-qemu-allocation.out b/tests/qemu-iotests/tests/nbd-qemu-allocation.out
index 9d938db24e..c1e60277f2 100644
--- a/tests/qemu-iotests/tests/nbd-qemu-allocation.out
+++ b/tests/qemu-iotests/tests/nbd-qemu-allocation.out
@@ -11,9 +11,9 @@ wrote 2097152/2097152 bytes at offset 1048576
 
 === Check allocation over NBD ===
 
-[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "offset": 327680},
-{ "start": 1048576, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680},
-{ "start": 3145728, "length": 1048576, "depth": 1, "present": false, "zero": true, "data": false}]
+[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
+{ "start": 1048576, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
+{ "start": 3145728, "length": 1048576, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
 exports available: 1
  export: ''
   size:  4194304
-- 
2.39.3

Re: [PATCH v2 3/3] qemu-iotests: update expected tests output to contain "compressed" field

[Denis V. Lunev]

On 7/6/23 18:30, Andrey Drobyshev wrote:
> The previous commit adds "compressed" boolean field to JSON output of
> "qemu-img map" command.  Let's tweak expected tests output accordingly.
>
> Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
> ---
>   tests/qemu-iotests/122.out                    |  84 ++++----
>   tests/qemu-iotests/154.out                    | 194 +++++++++---------
>   tests/qemu-iotests/179.out                    | 178 ++++++++--------
>   tests/qemu-iotests/244.out                    |  24 +--
>   tests/qemu-iotests/252.out                    |  10 +-
>   tests/qemu-iotests/274.out                    |  48 ++---
>   .../tests/nbd-qemu-allocation.out             |   6 +-
>   7 files changed, 272 insertions(+), 272 deletions(-)
>
> diff --git a/tests/qemu-iotests/122.out b/tests/qemu-iotests/122.out
> index e18766e167..6a1aa3fe2b 100644
> --- a/tests/qemu-iotests/122.out
> +++ b/tests/qemu-iotests/122.out
> @@ -67,12 +67,12 @@ read 65536/65536 bytes at offset 4194304
>   64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 65536/65536 bytes at offset 8388608
>   64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 65536, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 4194304, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 4259840, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 8388608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 8454144, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 65536, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 4259840, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 8388608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 8454144, "length": 4128768, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   read 65536/65536 bytes at offset 0
>   64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 65536/65536 bytes at offset 4194304
> @@ -94,12 +94,12 @@ wrote 1024/1024 bytes at offset 1046528
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   wrote 1024/1024 bytes at offset 0
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 65536, "length": 65536, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 131072, "length": 196608, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 327680, "length": 655360, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 983040, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 1048576, "length": 1046528, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 65536, "length": 65536, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 131072, "length": 196608, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 327680, "length": 655360, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 983040, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 1048576, "length": 1046528, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   read 16384/16384 bytes at offset 0
>   16 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 16384/16384 bytes at offset 16384
> @@ -130,14 +130,14 @@ read 3145728/3145728 bytes at offset 0
>   3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 63963136/63963136 bytes at offset 3145728
>   61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
>   
>   convert -c -S 0:
>   read 3145728/3145728 bytes at offset 0
>   3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 63963136/63963136 bytes at offset 3145728
>   61 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true}]
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
>   wrote 33554432/33554432 bytes at offset 0
>   32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> @@ -152,7 +152,7 @@ read 30408704/30408704 bytes at offset 3145728
>   29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 33554432/33554432 bytes at offset 33554432
>   32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
>   
>   convert -c -S 0 with source backing file:
>   read 3145728/3145728 bytes at offset 0
> @@ -161,7 +161,7 @@ read 30408704/30408704 bytes at offset 3145728
>   29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 33554432/33554432 bytes at offset 33554432
>   32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true}]
>   
>   convert -S 0 -B ...
>   read 3145728/3145728 bytes at offset 0
> @@ -170,7 +170,7 @@ read 30408704/30408704 bytes at offset 3145728
>   29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 33554432/33554432 bytes at offset 33554432
>   32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
>   
>   convert -c -S 0 -B ...
>   read 3145728/3145728 bytes at offset 0
> @@ -179,7 +179,7 @@ read 30408704/30408704 bytes at offset 3145728
>   29 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 33554432/33554432 bytes at offset 33554432
>   32 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true}]
>   
>   === Non-zero -S ===
>   
> @@ -196,32 +196,32 @@ wrote 1024/1024 bytes at offset 66560
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   
>   convert -S 4k
> -[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 4096, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 12288, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 20480, "length": 67088384, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 4096, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 12288, "length": 4096, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 20480, "length": 67088384, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   convert -c -S 4k
> -[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   convert -S 8k
> -[{ "start": 0, "length": 24576, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 24576, "length": 67084288, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 24576, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 24576, "length": 67084288, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   convert -c -S 8k
> -[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true},
> -{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 1024, "length": 7168, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 8192, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 9216, "length": 8192, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 17408, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": true},
> +{ "start": 18432, "length": 67090432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   === -n to a non-zero image ===
>   
> @@ -235,18 +235,18 @@ Images are identical.
>   
>   Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   === -n to an empty image with a backing file ===
>   
>   Formatting 'TEST_DIR/t.IMGFMT.orig', fmt=IMGFMT size=67108864
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
> -[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
> +[{ "start": 0, "length": 67108864, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
>   
>   === -n -B to an image without a backing file ===
>   
> diff --git a/tests/qemu-iotests/154.out b/tests/qemu-iotests/154.out
> index 1fa7ffc475..0199269add 100644
> --- a/tests/qemu-iotests/154.out
> +++ b/tests/qemu-iotests/154.out
> @@ -11,14 +11,14 @@ wrote 2048/2048 bytes at offset 17408
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   wrote 2048/2048 bytes at offset 27648
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4096, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 12288, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 20480, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 24576, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4096, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 8192, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 12288, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 16384, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 20480, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 24576, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == backing file contains non-zero data before write_zeroes ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -41,11 +41,11 @@ read 1024/1024 bytes at offset 65536
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 2048/2048 bytes at offset 67584
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 36864, "length": 28672, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 69632, "length": 134148096, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 36864, "length": 28672, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 69632, "length": 134148096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == backing file contains non-zero data after write_zeroes ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -68,11 +68,11 @@ read 1024/1024 bytes at offset 44032
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 3072/3072 bytes at offset 40960
>   3 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 36864, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 40960, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 45056, "length": 134172672, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 36864, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 40960, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 45056, "length": 134172672, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == write_zeroes covers non-zero data ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -101,15 +101,15 @@ wrote 2048/2048 bytes at offset 29696
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 4096/4096 bytes at offset 28672
>   4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 4096, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 8192, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 12288, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 16384, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 20480, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 24576, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 28672, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 4096, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 8192, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 12288, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 16384, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 20480, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 24576, "length": 4096, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 28672, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 32768, "length": 134184960, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == spanning two clusters, non-zero before request ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -142,16 +142,16 @@ read 1024/1024 bytes at offset 67584
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 5120/5120 bytes at offset 68608
>   5 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == spanning two clusters, non-zero after request ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -184,16 +184,16 @@ read 7168/7168 bytes at offset 65536
>   7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 1024/1024 bytes at offset 72704
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 32768, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 32768, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 36864, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 40960, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 49152, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 53248, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 57344, "length": 8192, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 73728, "length": 134144000, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == spanning two clusters, partially overwriting backing file ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -212,8 +212,8 @@ read 1024/1024 bytes at offset 5120
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 2048/2048 bytes at offset 6144
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 8192, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 8192, "length": 134209536, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 8192, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 8192, "length": 134209536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == spanning multiple clusters, non-zero in first cluster ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -226,10 +226,10 @@ read 2048/2048 bytes at offset 65536
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 10240/10240 bytes at offset 67584
>   10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 69632, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 69632, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == spanning multiple clusters, non-zero in intermediate cluster ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -240,9 +240,9 @@ wrote 7168/7168 bytes at offset 67584
>   7 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 12288/12288 bytes at offset 65536
>   12 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 65536, "length": 12288, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 65536, "length": 12288, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == spanning multiple clusters, non-zero in final cluster ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -255,10 +255,10 @@ read 10240/10240 bytes at offset 65536
>   10 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 2048/2048 bytes at offset 75776
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 65536, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 65536, "length": 8192, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == spanning multiple clusters, partially overwriting backing file ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134217728
> @@ -277,88 +277,88 @@ read 2048/2048 bytes at offset 74752
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 1024/1024 bytes at offset 76800
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 65536, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 69632, "length": 4096, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 73728, "length": 4096, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 77824, "length": 134139904, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   == unaligned image tail cluster, no allocation needed ==
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
>   wrote 512/512 bytes at offset 134217728
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
>   wrote 512/512 bytes at offset 134219264
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
>   wrote 1024/1024 bytes at offset 134218240
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776
>   wrote 2048/2048 bytes at offset 134217728
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 512/512 bytes at offset 134217728
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 512/512 bytes at offset 134219264
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 1024/1024 bytes at offset 134218240
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 2048/2048 bytes at offset 134217728
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   wrote 512/512 bytes at offset 134217728
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 512/512 bytes at offset 134217728
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 512/512 bytes at offset 134219264
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 1024/1024 bytes at offset 134218240
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 2048/2048 bytes at offset 134217728
>   2 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   2048/2048 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134218752
>   wrote 1024/1024 bytes at offset 134217728
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> @@ -369,15 +369,15 @@ read 512/512 bytes at offset 134217728
>   read 512/512 bytes at offset 134218240
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   1024/1024 bytes allocated at offset 128 MiB
> -[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
> +[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
>   wrote 1024/1024 bytes at offset 134217728
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   1024/1024 bytes allocated at offset 128 MiB
>   read 1024/1024 bytes at offset 134217728
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET}]
> +[{ "start": 0, "length": 134217728, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 1024, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET}]
>   
>   == unaligned image tail cluster, allocation required ==
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752
> @@ -390,8 +390,8 @@ read 512/512 bytes at offset 134217728
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 1536/1536 bytes at offset 134218240
>   1.500 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
>   Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=134218752
>   Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=134219776 backing_file=TEST_DIR/t.IMGFMT.base backing_fmt=IMGFMT
>   wrote 512/512 bytes at offset 134218240
> @@ -412,6 +412,6 @@ read 512/512 bytes at offset 134218240
>   512 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   read 1024/1024 bytes at offset 134218752
>   1 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> -[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET}]
> +[{ "start": 0, "length": 134217728, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 134217728, "length": 2048, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET}]
>   *** done
> diff --git a/tests/qemu-iotests/179.out b/tests/qemu-iotests/179.out
> index 7cf22cd75f..65b909ebc2 100644
> --- a/tests/qemu-iotests/179.out
> +++ b/tests/qemu-iotests/179.out
> @@ -13,11 +13,11 @@ wrote 2097152/2097152 bytes at offset 6291456
>   2 MiB (0x200000) bytes not allocated at offset 4 MiB (0x400000)
>   2 MiB (0x200000) bytes     allocated at offset 6 MiB (0x600000)
>   56 MiB (0x3800000) bytes not allocated at offset 8 MiB (0x800000)
> -[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 8388608, "length": 58720256, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 8388608, "length": 58720256, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   wrote 2097150/2097150 bytes at offset 10485761
>   2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   wrote 2097150/2097150 bytes at offset 14680065
> @@ -31,15 +31,15 @@ wrote 2097150/2097150 bytes at offset 14680065
>   2 MiB (0x200000) bytes not allocated at offset 12 MiB (0xc00000)
>   2 MiB (0x200000) bytes     allocated at offset 14 MiB (0xe00000)
>   48 MiB (0x3000000) bytes not allocated at offset 16 MiB (0x1000000)
> -[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 16777216, "length": 50331648, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 16777216, "length": 50331648, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   wrote 14680064/14680064 bytes at offset 18874368
>   14 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   wrote 2097152/2097152 bytes at offset 20971520
> @@ -57,21 +57,21 @@ wrote 6291456/6291456 bytes at offset 25165824
>   2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000)
>   14 MiB (0xe00000) bytes     allocated at offset 18 MiB (0x1200000)
>   32 MiB (0x2000000) bytes not allocated at offset 32 MiB (0x2000000)
> -[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 25165824, "length": 6291456, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
> -{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 25165824, "length": 6291456, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
> +{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   wrote 2097152/2097152 bytes at offset 27262976
>   2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   wrote 2097152/2097152 bytes at offset 29360128
> @@ -87,23 +87,23 @@ wrote 2097152/2097152 bytes at offset 29360128
>   2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000)
>   14 MiB (0xe00000) bytes     allocated at offset 18 MiB (0x1200000)
>   32 MiB (0x2000000) bytes not allocated at offset 32 MiB (0x2000000)
> -[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
> -{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
> -{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
> +{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
> +{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 33554432, "length": 33554432, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   wrote 8388608/8388608 bytes at offset 33554432
>   8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   wrote 2097152/2097152 bytes at offset 35651584
> @@ -121,24 +121,24 @@ wrote 2097152/2097152 bytes at offset 37748736
>   2 MiB (0x200000) bytes not allocated at offset 16 MiB (0x1000000)
>   22 MiB (0x1600000) bytes     allocated at offset 18 MiB (0x1200000)
>   24 MiB (0x1800000) bytes not allocated at offset 40 MiB (0x2800000)
> -[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
> -{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": OFFSET},
> -{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 33554432, "length": 8388608, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 41943040, "length": 25165824, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 6291456, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 8388608, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 10485760, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 12582912, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 14680064, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 16777216, "length": 2097152, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 18874368, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 20971520, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 23068672, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 25165824, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
> +{ "start": 27262976, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 29360128, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
> +{ "start": 31457280, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 33554432, "length": 8388608, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 41943040, "length": 25165824, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   wrote 8388608/8388608 bytes at offset 41943040
>   8 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   wrote 8388608/8388608 bytes at offset 50331648
> @@ -162,31 +162,31 @@ wrote 2097152/2097152 bytes at offset 62914560
>   4 MiB (0x400000) bytes not allocated at offset 54 MiB (0x3600000)
>   4 MiB (0x400000) bytes     allocated at offset 58 MiB (0x3a00000)
>   2 MiB (0x200000) bytes not allocated at offset 62 MiB (0x3e00000)
> -[{ "start": 0, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 2097152, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 6291456, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 8388608, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 10485760, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 12582912, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 14680064, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 16777216, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 18874368, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 20971520, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 23068672, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 25165824, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "offset": OFFSET},
> -{ "start": 27262976, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 29360128, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "offset": OFFSET},
> -{ "start": 31457280, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 33554432, "length": 10485760, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 44040192, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 48234496, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false},
> -{ "start": 50331648, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 52428800, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 56623104, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 58720256, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 60817408, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 65011712, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 2097152, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
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> +{ "start": 8388608, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 10485760, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
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> +{ "start": 16777216, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 18874368, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
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> +{ "start": 23068672, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 25165824, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
> +{ "start": 27262976, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 29360128, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false, "offset": OFFSET},
> +{ "start": 31457280, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 33554432, "length": 10485760, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 44040192, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 48234496, "length": 2097152, "depth": 1, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 50331648, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 52428800, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 56623104, "length": 2097152, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 58720256, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 60817408, "length": 4194304, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 65011712, "length": 2097152, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   No errors were found on the image.
>   No errors were found on the image.
>   
> diff --git a/tests/qemu-iotests/244.out b/tests/qemu-iotests/244.out
> index 5e03add054..38ffbd7e1e 100644
> --- a/tests/qemu-iotests/244.out
> +++ b/tests/qemu-iotests/244.out
> @@ -57,12 +57,12 @@ wrote 3145728/3145728 bytes at offset 3145728
>   3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   No errors were found on the image.
>   
> -[{ "start": 0, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false},
> -{ "start": 1048576, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "offset": 1048576},
> -{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false, "offset": 4194304},
> -{ "start": 5242880, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 6291456, "length": 60817408, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 1048576, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 1048576},
> +{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 4194304},
> +{ "start": 5242880, "length": 1048576, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 6291456, "length": 60817408, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   read 1048576/1048576 bytes at offset 0
>   1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> @@ -94,10 +94,10 @@ wrote 3145728/3145728 bytes at offset 3145728
>   3 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   No errors were found on the image.
>   
> -[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": 0},
> -{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 4194304, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "offset": 4194304},
> -{ "start": 6291456, "length": 60817408, "depth": 0, "present": true, "zero": false, "data": true, "offset": 6291456}]
> +[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 0},
> +{ "start": 2097152, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 4194304, "length": 2097152, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 4194304},
> +{ "start": 6291456, "length": 60817408, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 6291456}]
>   
>   read 1048576/1048576 bytes at offset 0
>   1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> @@ -123,8 +123,8 @@ read 1048576/1048576 bytes at offset 0
>   1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   Offset          Length          Mapped to       File
>   0               0x100000        0               TEST_DIR/t.qcow2.data
> -[{ "start": 0, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "offset": 0},
> -{ "start": 1048576, "length": 66060288, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 1048576, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 0},
> +{ "start": 1048576, "length": 66060288, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   === Copy offloading ===
>   
> diff --git a/tests/qemu-iotests/252.out b/tests/qemu-iotests/252.out
> index c578129c25..b1aa94cb05 100644
> --- a/tests/qemu-iotests/252.out
> +++ b/tests/qemu-iotests/252.out
> @@ -23,8 +23,8 @@ read 131072/131072 bytes at offset 131072
>   read 131072/131072 bytes at offset 262144
>   128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   
> -[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 262144, "length": 131072, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 262144, "length": 131072, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   read 131072/131072 bytes at offset 0
>   128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
> @@ -33,7 +33,7 @@ read 131072/131072 bytes at offset 131072
>   read 131072/131072 bytes at offset 262144
>   128 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
>   
> -[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "offset": OFFSET},
> -{ "start": 262144, "length": 65536, "depth": 0, "present": true, "zero": true, "data": false},
> -{ "start": 327680, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 262144, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": OFFSET},
> +{ "start": 262144, "length": 65536, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false},
> +{ "start": 327680, "length": 65536, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   *** done
> diff --git a/tests/qemu-iotests/274.out b/tests/qemu-iotests/274.out
> index acd8b166a6..c2967335ca 100644
> --- a/tests/qemu-iotests/274.out
> +++ b/tests/qemu-iotests/274.out
> @@ -20,18 +20,18 @@ read 1048576/1048576 bytes at offset 1048576
>   0/1048576 bytes allocated at offset 1 MiB
>   
>   === Checking map ===
> -[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
> +[{ "start": 0, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
>   
>   Offset          Length          Mapped to       File
>   0               0x200000        0x50000         TEST_DIR/PID-base
>   
> -[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "offset": 327680}]
> +[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
>   
>   Offset          Length          Mapped to       File
>   0               0x100000        0x50000         TEST_DIR/PID-base
>   
> -[{ "start": 0, "length": 1048576, "depth": 2, "present": true, "zero": false, "data": true, "offset": 327680},
> -{ "start": 1048576, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 1048576, "depth": 2, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
> +{ "start": 1048576, "length": 1048576, "depth": 0, "present": false, "zero": true, "data": false, "compressed": false}]
>   
>   Offset          Length          Mapped to       File
>   0               0x100000        0x50000         TEST_DIR/PID-base
> @@ -186,8 +186,8 @@ read 65536/65536 bytes at offset 5368709120
>   1 GiB (0x40000000) bytes not allocated at offset 0 bytes (0x0)
>   7 GiB (0x1c0000000) bytes     allocated at offset 1 GiB (0x40000000)
>   
> -[{ "start": 0, "length": 1073741824, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 1073741824, "length": 7516192768, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 1073741824, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 1073741824, "length": 7516192768, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   
>   === preallocation=metadata ===
>   wrote 65536/65536 bytes at offset 33285996544
> @@ -201,13 +201,13 @@ read 65536/65536 bytes at offset 33285996544
>   30 GiB (0x780000000) bytes not allocated at offset 0 bytes (0x0)
>   3 GiB (0xc0000000) bytes     allocated at offset 30 GiB (0x780000000)
>   
> -[{ "start": 0, "length": 32212254720, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 32212254720, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 327680},
> -{ "start": 32749125632, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 537264128},
> -{ "start": 33285996544, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 1074200576},
> -{ "start": 33822867456, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 1611137024},
> -{ "start": 34359738368, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 2148139008},
> -{ "start": 34896609280, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "offset": 2685075456}]
> +[{ "start": 0, "length": 32212254720, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 32212254720, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 327680},
> +{ "start": 32749125632, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 537264128},
> +{ "start": 33285996544, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 1074200576},
> +{ "start": 33822867456, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 1611137024},
> +{ "start": 34359738368, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 2148139008},
> +{ "start": 34896609280, "length": 536870912, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false, "offset": 2685075456}]
>   
>   === preallocation=falloc ===
>   wrote 65536/65536 bytes at offset 9437184
> @@ -221,8 +221,8 @@ read 65536/65536 bytes at offset 9437184
>   5 MiB (0x500000) bytes not allocated at offset 0 bytes (0x0)
>   10 MiB (0xa00000) bytes     allocated at offset 5 MiB (0x500000)
>   
> -[{ "start": 0, "length": 5242880, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 5242880, "length": 10485760, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
> +[{ "start": 0, "length": 5242880, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 5242880, "length": 10485760, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
>   
>   === preallocation=full ===
>   wrote 65536/65536 bytes at offset 11534336
> @@ -236,8 +236,8 @@ read 65536/65536 bytes at offset 11534336
>   8 MiB (0x800000) bytes not allocated at offset 0 bytes (0x0)
>   4 MiB (0x400000) bytes     allocated at offset 8 MiB (0x800000)
>   
> -[{ "start": 0, "length": 8388608, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 8388608, "length": 4194304, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680}]
> +[{ "start": 0, "length": 8388608, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 8388608, "length": 4194304, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680}]
>   
>   === preallocation=off ===
>   wrote 65536/65536 bytes at offset 259072
> @@ -251,9 +251,9 @@ read 65536/65536 bytes at offset 259072
>   192 KiB (0x30000) bytes not allocated at offset 0 bytes (0x0)
>   320 KiB (0x50000) bytes     allocated at offset 192 KiB (0x30000)
>   
> -[{ "start": 0, "length": 196608, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 196608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680},
> -{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 196608, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 196608, "length": 65536, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
> +{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   
>   === preallocation=off ===
>   wrote 65536/65536 bytes at offset 344064
> @@ -267,8 +267,8 @@ read 65536/65536 bytes at offset 344064
>   256 KiB (0x40000) bytes not allocated at offset 0 bytes (0x0)
>   256 KiB (0x40000) bytes     allocated at offset 256 KiB (0x40000)
>   
> -[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 262144, "length": 262144, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   
>   === preallocation=off ===
>   wrote 65536/65536 bytes at offset 446464
> @@ -282,6 +282,6 @@ read 65536/65536 bytes at offset 446464
>   256 KiB (0x40000) bytes not allocated at offset 0 bytes (0x0)
>   244 KiB (0x3d000) bytes     allocated at offset 256 KiB (0x40000)
>   
> -[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false},
> -{ "start": 262144, "length": 249856, "depth": 0, "present": true, "zero": true, "data": false}]
> +[{ "start": 0, "length": 262144, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false},
> +{ "start": 262144, "length": 249856, "depth": 0, "present": true, "zero": true, "data": false, "compressed": false}]
>   
> diff --git a/tests/qemu-iotests/tests/nbd-qemu-allocation.out b/tests/qemu-iotests/tests/nbd-qemu-allocation.out
> index 9d938db24e..c1e60277f2 100644
> --- a/tests/qemu-iotests/tests/nbd-qemu-allocation.out
> +++ b/tests/qemu-iotests/tests/nbd-qemu-allocation.out
> @@ -11,9 +11,9 @@ wrote 2097152/2097152 bytes at offset 1048576
>   
>   === Check allocation over NBD ===
>   
> -[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "offset": 327680},
> -{ "start": 1048576, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "offset": 327680},
> -{ "start": 3145728, "length": 1048576, "depth": 1, "present": false, "zero": true, "data": false}]
> +[{ "start": 0, "length": 1048576, "depth": 1, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
> +{ "start": 1048576, "length": 2097152, "depth": 0, "present": true, "zero": false, "data": true, "compressed": false, "offset": 327680},
> +{ "start": 3145728, "length": 1048576, "depth": 1, "present": false, "zero": true, "data": false, "compressed": false}]
>   exports available: 1
>    export: ''
>     size:  4194304
Reviewed-by: Denis V. Lunev <den@openvz.org>

Re: [PATCH v2 0/3] qemu-img: map: implement support for compressed clusters

[Andrey Drobyshev]

On 7/6/23 19:30, Andrey Drobyshev wrote:
> v1 --> v2:
>   * Add vmdk format to the 1st commit.  Tweak commit message accordingly;
>   * Make "compressed" field in MapEntry optional.
> 
> v1: https://lists.nongnu.org/archive/html/qemu-block/2023-06/msg00184.html
> 
> Andrey Drobyshev (3):
>   block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()
>   qemu-img: map: report compressed data blocks
>   qemu-iotests: update expected tests output to contain "compressed"
>     field
> 
>  block/qcow.c                                  |   5 +-
>  block/qcow2.c                                 |   3 +
>  block/vmdk.c                                  |   2 +
>  include/block/block-common.h                  |   3 +
>  qapi/block-core.json                          |   7 +-
>  qemu-img.c                                    |  16 +-
>  tests/qemu-iotests/122.out                    |  84 ++++----
>  tests/qemu-iotests/154.out                    | 194 +++++++++---------
>  tests/qemu-iotests/179.out                    | 178 ++++++++--------
>  tests/qemu-iotests/244.out                    |  24 +--
>  tests/qemu-iotests/252.out                    |  10 +-
>  tests/qemu-iotests/274.out                    |  48 ++---
>  .../tests/nbd-qemu-allocation.out             |   6 +-
>  13 files changed, 302 insertions(+), 278 deletions(-)
> 

Ping

Re: [PATCH v2 0/3] qemu-img: map: implement support for compressed clusters

[Andrey Drobyshev]

On 7/24/23 16:10, Andrey Drobyshev wrote:
> On 7/6/23 19:30, Andrey Drobyshev wrote:
>> v1 --> v2:
>>   * Add vmdk format to the 1st commit.  Tweak commit message accordingly;
>>   * Make "compressed" field in MapEntry optional.
>>
>> v1: https://lists.nongnu.org/archive/html/qemu-block/2023-06/msg00184.html
>>
>> Andrey Drobyshev (3):
>>   block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()
>>   qemu-img: map: report compressed data blocks
>>   qemu-iotests: update expected tests output to contain "compressed"
>>     field
>>
>>  block/qcow.c                                  |   5 +-
>>  block/qcow2.c                                 |   3 +
>>  block/vmdk.c                                  |   2 +
>>  include/block/block-common.h                  |   3 +
>>  qapi/block-core.json                          |   7 +-
>>  qemu-img.c                                    |  16 +-
>>  tests/qemu-iotests/122.out                    |  84 ++++----
>>  tests/qemu-iotests/154.out                    | 194 +++++++++---------
>>  tests/qemu-iotests/179.out                    | 178 ++++++++--------
>>  tests/qemu-iotests/244.out                    |  24 +--
>>  tests/qemu-iotests/252.out                    |  10 +-
>>  tests/qemu-iotests/274.out                    |  48 ++---
>>  .../tests/nbd-qemu-allocation.out             |   6 +-
>>  13 files changed, 302 insertions(+), 278 deletions(-)
>>
> 
> Ping

Yet another ping

Re: [PATCH v2 0/3] qemu-img: map: implement support for compressed clusters

[Andrey Drobyshev]

On 7/31/23 17:45, Andrey Drobyshev wrote:
> On 7/24/23 16:10, Andrey Drobyshev wrote:
>> On 7/6/23 19:30, Andrey Drobyshev wrote:
>>> v1 --> v2:
>>>   * Add vmdk format to the 1st commit.  Tweak commit message accordingly;
>>>   * Make "compressed" field in MapEntry optional.
>>>
>>> v1: https://lists.nongnu.org/archive/html/qemu-block/2023-06/msg00184.html
>>>
>>> Andrey Drobyshev (3):
>>>   block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()
>>>   qemu-img: map: report compressed data blocks
>>>   qemu-iotests: update expected tests output to contain "compressed"
>>>     field
>>>
>>>  block/qcow.c                                  |   5 +-
>>>  block/qcow2.c                                 |   3 +
>>>  block/vmdk.c                                  |   2 +
>>>  include/block/block-common.h                  |   3 +
>>>  qapi/block-core.json                          |   7 +-
>>>  qemu-img.c                                    |  16 +-
>>>  tests/qemu-iotests/122.out                    |  84 ++++----
>>>  tests/qemu-iotests/154.out                    | 194 +++++++++---------
>>>  tests/qemu-iotests/179.out                    | 178 ++++++++--------
>>>  tests/qemu-iotests/244.out                    |  24 +--
>>>  tests/qemu-iotests/252.out                    |  10 +-
>>>  tests/qemu-iotests/274.out                    |  48 ++---
>>>  .../tests/nbd-qemu-allocation.out             |   6 +-
>>>  13 files changed, 302 insertions(+), 278 deletions(-)
>>>
>>
>> Ping
> 
> Yet another ping

One more ping after 6 weeks

Re: [PATCH v2 0/3] qemu-img: map: implement support for compressed clusters

[Andrey Drobyshev]

On 8/16/23 12:22, Andrey Drobyshev wrote:
> On 7/31/23 17:45, Andrey Drobyshev wrote:
>> On 7/24/23 16:10, Andrey Drobyshev wrote:
>>> On 7/6/23 19:30, Andrey Drobyshev wrote:
>>>> v1 --> v2:
>>>>   * Add vmdk format to the 1st commit.  Tweak commit message accordingly;
>>>>   * Make "compressed" field in MapEntry optional.
>>>>
>>>> v1: https://lists.nongnu.org/archive/html/qemu-block/2023-06/msg00184.html
>>>>
>>>> Andrey Drobyshev (3):
>>>>   block: add BDRV_BLOCK_COMPRESSED flag for bdrv_block_status()
>>>>   qemu-img: map: report compressed data blocks
>>>>   qemu-iotests: update expected tests output to contain "compressed"
>>>>     field
>>>>
>>>>  block/qcow.c                                  |   5 +-
>>>>  block/qcow2.c                                 |   3 +
>>>>  block/vmdk.c                                  |   2 +
>>>>  include/block/block-common.h                  |   3 +
>>>>  qapi/block-core.json                          |   7 +-
>>>>  qemu-img.c                                    |  16 +-
>>>>  tests/qemu-iotests/122.out                    |  84 ++++----
>>>>  tests/qemu-iotests/154.out                    | 194 +++++++++---------
>>>>  tests/qemu-iotests/179.out                    | 178 ++++++++--------
>>>>  tests/qemu-iotests/244.out                    |  24 +--
>>>>  tests/qemu-iotests/252.out                    |  10 +-
>>>>  tests/qemu-iotests/274.out                    |  48 ++---
>>>>  .../tests/nbd-qemu-allocation.out             |   6 +-
>>>>  13 files changed, 302 insertions(+), 278 deletions(-)
>>>>
>>>
>>> Ping
>>
>> Yet another ping
> 
> One more ping after 6 weeks

One more friendly ping