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[PATCH v10 31/34] qcow2: Add the 'extended_l2' option and the QCOW2_INCO


From: Alberto Garcia
Subject: [PATCH v10 31/34] qcow2: Add the 'extended_l2' option and the QCOW2_INCOMPAT_EXTL2 bit
Date: Fri, 3 Jul 2020 17:58:17 +0200

Now that the implementation of subclusters is complete we can finally
add the necessary options to create and read images with this feature,
which we call "extended L2 entries".

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
---
 qapi/block-core.json             |   7 +++
 block/qcow2.h                    |   8 ++-
 include/block/block_int.h        |   1 +
 block/qcow2.c                    |  74 ++++++++++++++++++++--
 tests/qemu-iotests/031.out       |   8 +--
 tests/qemu-iotests/036.out       |   4 +-
 tests/qemu-iotests/049.out       | 102 +++++++++++++++----------------
 tests/qemu-iotests/060.out       |   1 +
 tests/qemu-iotests/061.out       |  20 +++---
 tests/qemu-iotests/065           |  12 ++--
 tests/qemu-iotests/082.out       |  48 ++++++++++++---
 tests/qemu-iotests/085.out       |  38 ++++++------
 tests/qemu-iotests/144.out       |   4 +-
 tests/qemu-iotests/182.out       |   2 +-
 tests/qemu-iotests/185.out       |   8 +--
 tests/qemu-iotests/198.out       |   2 +
 tests/qemu-iotests/206.out       |   4 ++
 tests/qemu-iotests/242.out       |   5 ++
 tests/qemu-iotests/255.out       |   8 +--
 tests/qemu-iotests/274.out       |  49 ++++++++-------
 tests/qemu-iotests/280.out       |   2 +-
 tests/qemu-iotests/291.out       |   6 +-
 tests/qemu-iotests/common.filter |   1 +
 23 files changed, 272 insertions(+), 142 deletions(-)

diff --git a/qapi/block-core.json b/qapi/block-core.json
index 0e1c6a59f2..24e002ebae 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -66,6 +66,9 @@
 #                 standalone (read-only) raw image without looking at qcow2
 #                 metadata (since: 4.0)
 #
+# @extended-l2: true if the image has extended L2 entries; only valid for
+#               compat >= 1.1 (since 5.1)
+#
 # @lazy-refcounts: on or off; only valid for compat >= 1.1
 #
 # @corrupt: true if the image has been marked corrupt; only valid for
@@ -87,6 +90,7 @@
       'compat': 'str',
       '*data-file': 'str',
       '*data-file-raw': 'bool',
+      '*extended-l2': 'bool',
       '*lazy-refcounts': 'bool',
       '*corrupt': 'bool',
       'refcount-bits': 'int',
@@ -4318,6 +4322,8 @@
 # @data-file-raw: True if the external data file must stay valid as a
 #                 standalone (read-only) raw image without looking at qcow2
 #                 metadata (default: false; since: 4.0)
+# @extended-l2      True to make the image have extended L2 entries
+#                   (default: false; since 5.1)
 # @size: Size of the virtual disk in bytes
 # @version: Compatibility level (default: v3)
 # @backing-file: File name of the backing file if a backing file
@@ -4338,6 +4344,7 @@
   'data': { 'file':             'BlockdevRef',
             '*data-file':       'BlockdevRef',
             '*data-file-raw':   'bool',
+            '*extended-l2':     'bool',
             'size':             'size',
             '*version':         'BlockdevQcow2Version',
             '*backing-file':    'str',
diff --git a/block/qcow2.h b/block/qcow2.h
index f3499e53bf..065ec3df0b 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -246,15 +246,18 @@ enum {
     QCOW2_INCOMPAT_CORRUPT_BITNR    = 1,
     QCOW2_INCOMPAT_DATA_FILE_BITNR  = 2,
     QCOW2_INCOMPAT_COMPRESSION_BITNR = 3,
+    QCOW2_INCOMPAT_EXTL2_BITNR      = 4,
     QCOW2_INCOMPAT_DIRTY            = 1 << QCOW2_INCOMPAT_DIRTY_BITNR,
     QCOW2_INCOMPAT_CORRUPT          = 1 << QCOW2_INCOMPAT_CORRUPT_BITNR,
     QCOW2_INCOMPAT_DATA_FILE        = 1 << QCOW2_INCOMPAT_DATA_FILE_BITNR,
     QCOW2_INCOMPAT_COMPRESSION      = 1 << QCOW2_INCOMPAT_COMPRESSION_BITNR,
+    QCOW2_INCOMPAT_EXTL2            = 1 << QCOW2_INCOMPAT_EXTL2_BITNR,
 
     QCOW2_INCOMPAT_MASK             = QCOW2_INCOMPAT_DIRTY
                                     | QCOW2_INCOMPAT_CORRUPT
                                     | QCOW2_INCOMPAT_DATA_FILE
-                                    | QCOW2_INCOMPAT_COMPRESSION,
+                                    | QCOW2_INCOMPAT_COMPRESSION
+                                    | QCOW2_INCOMPAT_EXTL2,
 };
 
 /* Compatible feature bits */
@@ -581,8 +584,7 @@ typedef enum QCow2MetadataOverlap {
 
 static inline bool has_subclusters(BDRVQcow2State *s)
 {
-    /* FIXME: Return false until this feature is complete */
-    return false;
+    return s->incompatible_features & QCOW2_INCOMPAT_EXTL2;
 }
 
 static inline size_t l2_entry_size(BDRVQcow2State *s)
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 791de6a59c..36e1993788 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -58,6 +58,7 @@
 #define BLOCK_OPT_DATA_FILE         "data_file"
 #define BLOCK_OPT_DATA_FILE_RAW     "data_file_raw"
 #define BLOCK_OPT_COMPRESSION_TYPE  "compression_type"
+#define BLOCK_OPT_EXTL2             "extended_l2"
 
 #define BLOCK_PROBE_BUF_SIZE        512
 
diff --git a/block/qcow2.c b/block/qcow2.c
index 04572f39e1..3dfb56ccca 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1438,6 +1438,12 @@ static int coroutine_fn qcow2_do_open(BlockDriverState 
*bs, QDict *options,
     s->subcluster_size = s->cluster_size / s->subclusters_per_cluster;
     s->subcluster_bits = ctz32(s->subcluster_size);
 
+    if (s->subcluster_size < (1 << MIN_CLUSTER_BITS)) {
+        error_setg(errp, "Unsupported subcluster size: %d", 
s->subcluster_size);
+        ret = -EINVAL;
+        goto fail;
+    }
+
     /* Check support for various header values */
     if (header.refcount_order > 6) {
         error_setg(errp, "Reference count entry width too large; may not "
@@ -2924,6 +2930,11 @@ int qcow2_update_header(BlockDriverState *bs)
                 .bit  = QCOW2_INCOMPAT_COMPRESSION_BITNR,
                 .name = "compression type",
             },
+            {
+                .type = QCOW2_FEAT_TYPE_INCOMPATIBLE,
+                .bit  = QCOW2_INCOMPAT_EXTL2_BITNR,
+                .name = "extended L2 entries",
+            },
             {
                 .type = QCOW2_FEAT_TYPE_COMPATIBLE,
                 .bit  = QCOW2_COMPAT_LAZY_REFCOUNTS_BITNR,
@@ -3271,7 +3282,8 @@ static int64_t qcow2_calc_prealloc_size(int64_t 
total_size,
     return meta_size + aligned_total_size;
 }
 
-static bool validate_cluster_size(size_t cluster_size, Error **errp)
+static bool validate_cluster_size(size_t cluster_size, bool extended_l2,
+                                  Error **errp)
 {
     int cluster_bits = ctz32(cluster_size);
     if (cluster_bits < MIN_CLUSTER_BITS || cluster_bits > MAX_CLUSTER_BITS ||
@@ -3281,16 +3293,28 @@ static bool validate_cluster_size(size_t cluster_size, 
Error **errp)
                    "%dk", 1 << MIN_CLUSTER_BITS, 1 << (MAX_CLUSTER_BITS - 10));
         return false;
     }
+
+    if (extended_l2) {
+        unsigned min_cluster_size =
+            (1 << MIN_CLUSTER_BITS) * QCOW_EXTL2_SUBCLUSTERS_PER_CLUSTER;
+        if (cluster_size < min_cluster_size) {
+            error_setg(errp, "Extended L2 entries are only supported with "
+                       "cluster sizes of at least %u bytes", min_cluster_size);
+            return false;
+        }
+    }
+
     return true;
 }
 
-static size_t qcow2_opt_get_cluster_size_del(QemuOpts *opts, Error **errp)
+static size_t qcow2_opt_get_cluster_size_del(QemuOpts *opts, bool extended_l2,
+                                             Error **errp)
 {
     size_t cluster_size;
 
     cluster_size = qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE,
                                          DEFAULT_CLUSTER_SIZE);
-    if (!validate_cluster_size(cluster_size, errp)) {
+    if (!validate_cluster_size(cluster_size, extended_l2, errp)) {
         return 0;
     }
     return cluster_size;
@@ -3405,7 +3429,20 @@ qcow2_co_create(BlockdevCreateOptions *create_options, 
Error **errp)
         cluster_size = DEFAULT_CLUSTER_SIZE;
     }
 
-    if (!validate_cluster_size(cluster_size, errp)) {
+    if (!qcow2_opts->has_extended_l2) {
+        qcow2_opts->extended_l2 = false;
+    }
+    if (qcow2_opts->extended_l2) {
+        if (version < 3) {
+            error_setg(errp, "Extended L2 entries are only supported with "
+                       "compatibility level 1.1 and above (use version=v3 or "
+                       "greater)");
+            ret = -EINVAL;
+            goto out;
+        }
+    }
+
+    if (!validate_cluster_size(cluster_size, qcow2_opts->extended_l2, errp)) {
         ret = -EINVAL;
         goto out;
     }
@@ -3556,6 +3593,11 @@ qcow2_co_create(BlockdevCreateOptions *create_options, 
Error **errp)
             cpu_to_be64(QCOW2_INCOMPAT_COMPRESSION);
     }
 
+    if (qcow2_opts->extended_l2) {
+        header->incompatible_features |=
+            cpu_to_be64(QCOW2_INCOMPAT_EXTL2);
+    }
+
     ret = blk_pwrite(blk, 0, header, cluster_size, 0);
     g_free(header);
     if (ret < 0) {
@@ -3736,6 +3778,7 @@ static int coroutine_fn qcow2_co_create_opts(BlockDriver 
*drv,
         { BLOCK_OPT_BACKING_FMT,        "backing-fmt" },
         { BLOCK_OPT_CLUSTER_SIZE,       "cluster-size" },
         { BLOCK_OPT_LAZY_REFCOUNTS,     "lazy-refcounts" },
+        { BLOCK_OPT_EXTL2,              "extended-l2" },
         { BLOCK_OPT_REFCOUNT_BITS,      "refcount-bits" },
         { BLOCK_OPT_ENCRYPT,            BLOCK_OPT_ENCRYPT_FORMAT },
         { BLOCK_OPT_COMPAT_LEVEL,       "version" },
@@ -4854,11 +4897,14 @@ static BlockMeasureInfo *qcow2_measure(QemuOpts *opts, 
BlockDriverState *in_bs,
     PreallocMode prealloc;
     bool has_backing_file;
     bool has_luks;
-    bool extended_l2 = false; /* Set to false until the option is added */
+    bool extended_l2;
     size_t l2e_size;
 
     /* Parse image creation options */
-    cluster_size = qcow2_opt_get_cluster_size_del(opts, &local_err);
+    extended_l2 = qemu_opt_get_bool_del(opts, BLOCK_OPT_EXTL2, false);
+
+    cluster_size = qcow2_opt_get_cluster_size_del(opts, extended_l2,
+                                                  &local_err);
     if (local_err) {
         goto err;
     }
@@ -5062,6 +5108,8 @@ static ImageInfoSpecific 
*qcow2_get_specific_info(BlockDriverState *bs,
             .corrupt            = s->incompatible_features &
                                   QCOW2_INCOMPAT_CORRUPT,
             .has_corrupt        = true,
+            .has_extended_l2    = true,
+            .extended_l2        = has_subclusters(s),
             .refcount_bits      = s->refcount_bits,
             .has_bitmaps        = !!bitmaps,
             .bitmaps            = bitmaps,
@@ -5491,6 +5539,14 @@ static int qcow2_amend_options(BlockDriverState *bs, 
QemuOpts *opts,
                                  "is not supported");
                 return -ENOTSUP;
             }
+        } else if (!strcmp(desc->name, BLOCK_OPT_EXTL2)) {
+            bool extended_l2 = qemu_opt_get_bool(opts, BLOCK_OPT_EXTL2,
+                                                 has_subclusters(s));
+            if (extended_l2 != has_subclusters(s)) {
+                error_setg(errp, "Toggling extended L2 entries "
+                           "is not supported");
+                return -ENOTSUP;
+            }
         } else {
             /* if this point is reached, this probably means a new option was
              * added without having it covered here */
@@ -5751,6 +5807,12 @@ static QemuOptsList qcow2_create_opts = {
             .help = "Postpone refcount updates",
             .def_value_str = "off"
         },
+        {
+            .name = BLOCK_OPT_EXTL2,
+            .type = QEMU_OPT_BOOL,
+            .help = "Extended L2 tables",
+            .def_value_str = "off"
+        },
         {
             .name = BLOCK_OPT_REFCOUNT_BITS,
             .type = QEMU_OPT_NUMBER,
diff --git a/tests/qemu-iotests/031.out b/tests/qemu-iotests/031.out
index 4b21d6a9ba..0054c2ed97 100644
--- a/tests/qemu-iotests/031.out
+++ b/tests/qemu-iotests/031.out
@@ -117,7 +117,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 Header extension:
@@ -150,7 +150,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 Header extension:
@@ -164,7 +164,7 @@ No errors were found on the image.
 
 magic                     0x514649fb
 version                   3
-backing_file_offset       0x210
+backing_file_offset       0x240
 backing_file_size         0x17
 cluster_bits              16
 size                      67108864
@@ -188,7 +188,7 @@ data                      'host_device'
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 Header extension:
diff --git a/tests/qemu-iotests/036.out b/tests/qemu-iotests/036.out
index a9bed828e5..1fa7cad28d 100644
--- a/tests/qemu-iotests/036.out
+++ b/tests/qemu-iotests/036.out
@@ -26,7 +26,7 @@ compatible_features       []
 autoclear_features        [63]
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 
@@ -38,7 +38,7 @@ compatible_features       []
 autoclear_features        []
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 *** done
diff --git a/tests/qemu-iotests/049.out b/tests/qemu-iotests/049.out
index c54ae21b86..c8356be551 100644
--- a/tests/qemu-iotests/049.out
+++ b/tests/qemu-iotests/049.out
@@ -4,90 +4,90 @@ QA output created by 049
 == 1. Traditional size parameter ==
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024b
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1k
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1K
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1048576 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1048576 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1G
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1073741824 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1073741824 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1T
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1099511627776 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1099511627776 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024.0
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1024.0b
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5k
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5K
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1572864 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1572864 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5G
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1610612736 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1610612736 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 TEST_DIR/t.qcow2 1.5T
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1649267441664 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1649267441664 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 == 2. Specifying size via -o ==
 
 qemu-img create -f qcow2 -o size=1024 TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1024b TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1k TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1K TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1M TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1048576 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1048576 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1G TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1073741824 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1073741824 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1T TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1099511627776 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1099511627776 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1024.0 TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1024.0b TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1024 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1.5k TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1.5K TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1536 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1.5M TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1572864 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1572864 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1.5G TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1610612736 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1610612736 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o size=1.5T TEST_DIR/t.qcow2
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1649267441664 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=1649267441664 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 == 3. Invalid sizes ==
 
@@ -129,84 +129,84 @@ qemu-img: TEST_DIR/t.qcow2: The image size must be 
specified only once
 == Check correct interpretation of suffixes for cluster size ==
 
 qemu-img create -f qcow2 -o cluster_size=1024 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=1024b TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=1k TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=1K TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=1M TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1048576 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1048576 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=1024.0 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=1024.0b TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=1024 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=0.5k TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=512 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=512 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=0.5K TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=512 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=512 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 qemu-img create -f qcow2 -o cluster_size=0.5M TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=524288 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=524288 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 == Check compat level option ==
 
 qemu-img create -f qcow2 -o compat=0.10 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.10 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.10 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o compat=1.1 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=1.1 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=1.1 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o compat=0.42 TEST_DIR/t.qcow2 64M
 qemu-img: TEST_DIR/t.qcow2: Invalid parameter '0.42'
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.42 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.42 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o compat=foobar TEST_DIR/t.qcow2 64M
 qemu-img: TEST_DIR/t.qcow2: Invalid parameter 'foobar'
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=foobar 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=foobar 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 == Check preallocation option ==
 
 qemu-img create -f qcow2 -o preallocation=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=65536 
preallocation=off lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=65536 
preallocation=off lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o preallocation=metadata TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=65536 
preallocation=metadata lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=65536 
preallocation=metadata lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o preallocation=1234 TEST_DIR/t.qcow2 64M
 qemu-img: TEST_DIR/t.qcow2: Invalid parameter '1234'
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=65536 
preallocation=1234 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 cluster_size=65536 
preallocation=1234 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 == Check encryption option ==
 
 qemu-img create -f qcow2 -o encryption=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 encryption=off 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 encryption=off 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 --object secret,id=sec0,data=123456 -o 
encryption=on,encrypt.key-secret=sec0 TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 encryption=on 
encrypt.key-secret=sec0 cluster_size=65536 lazy_refcounts=off refcount_bits=16 
compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 encryption=on 
encrypt.key-secret=sec0 cluster_size=65536 lazy_refcounts=off extended_l2=off 
refcount_bits=16 compression_type=zlib
 
 == Check lazy_refcounts option (only with v3) ==
 
 qemu-img create -f qcow2 -o compat=1.1,lazy_refcounts=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=1.1 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=1.1 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o compat=1.1,lazy_refcounts=on TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=1.1 
cluster_size=65536 lazy_refcounts=on refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=1.1 
cluster_size=65536 lazy_refcounts=on extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o compat=0.10,lazy_refcounts=off TEST_DIR/t.qcow2 64M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.10 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.10 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 qemu-img create -f qcow2 -o compat=0.10,lazy_refcounts=on TEST_DIR/t.qcow2 64M
 qemu-img: TEST_DIR/t.qcow2: Lazy refcounts only supported with compatibility 
level 1.1 and above (use version=v3 or greater)
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.10 
cluster_size=65536 lazy_refcounts=on refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 compat=0.10 
cluster_size=65536 lazy_refcounts=on extended_l2=off refcount_bits=16 
compression_type=zlib
 
 *** done
diff --git a/tests/qemu-iotests/060.out b/tests/qemu-iotests/060.out
index fa3d68f0df..bb98fa5db8 100644
--- a/tests/qemu-iotests/060.out
+++ b/tests/qemu-iotests/060.out
@@ -21,6 +21,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: true
+    extended l2: false
 qemu-io: can't open device TEST_DIR/t.IMGFMT: IMGFMT: Image is corrupt; cannot 
be opened read/write
 no file open, try 'help open'
 read 512/512 bytes at offset 0
diff --git a/tests/qemu-iotests/061.out b/tests/qemu-iotests/061.out
index 2f03cf045c..f618259d47 100644
--- a/tests/qemu-iotests/061.out
+++ b/tests/qemu-iotests/061.out
@@ -26,7 +26,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 magic                     0x514649fb
@@ -84,7 +84,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 magic                     0x514649fb
@@ -140,7 +140,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 ERROR cluster 5 refcount=0 reference=1
@@ -195,7 +195,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 magic                     0x514649fb
@@ -264,7 +264,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 read 65536/65536 bytes at offset 44040192
@@ -326,7 +326,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 ERROR cluster 5 refcount=0 reference=1
@@ -355,7 +355,7 @@ header_length             112
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 read 131072/131072 bytes at offset 0
@@ -525,6 +525,7 @@ Format specific information:
     data file: TEST_DIR/t.IMGFMT.data
     data file raw: false
     corrupt: false
+    extended l2: false
 No errors were found on the image.
 
 === Try changing the external data file ===
@@ -546,6 +547,7 @@ Format specific information:
     data file: foo
     data file raw: false
     corrupt: false
+    extended l2: false
 
 qemu-img: Could not open 'TEST_DIR/t.IMGFMT': 'data-file' is required for this 
image
 image: TEST_DIR/t.IMGFMT
@@ -559,6 +561,7 @@ Format specific information:
     refcount bits: 16
     data file raw: false
     corrupt: false
+    extended l2: false
 
 === Clearing and setting data-file-raw ===
 
@@ -575,6 +578,7 @@ Format specific information:
     data file: TEST_DIR/t.IMGFMT.data
     data file raw: true
     corrupt: false
+    extended l2: false
 No errors were found on the image.
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
@@ -588,6 +592,7 @@ Format specific information:
     data file: TEST_DIR/t.IMGFMT.data
     data file raw: false
     corrupt: false
+    extended l2: false
 No errors were found on the image.
 qemu-img: data-file-raw cannot be set on existing images
 image: TEST_DIR/t.IMGFMT
@@ -602,5 +607,6 @@ Format specific information:
     data file: TEST_DIR/t.IMGFMT.data
     data file raw: false
     corrupt: false
+    extended l2: false
 No errors were found on the image.
 *** done
diff --git a/tests/qemu-iotests/065 b/tests/qemu-iotests/065
index 18dc488c7a..29a7f7ad60 100755
--- a/tests/qemu-iotests/065
+++ b/tests/qemu-iotests/065
@@ -98,20 +98,20 @@ class TestQCow3NotLazy(TestQemuImgInfo):
     img_options = 'compat=1.1,lazy_refcounts=off'
     json_compare = { 'compat': '1.1', 'lazy-refcounts': False,
                      'refcount-bits': 16, 'corrupt': False,
-                     'compression-type': 'zlib' }
+                     'compression-type': 'zlib', 'extended-l2': False }
     human_compare = [ 'compat: 1.1', 'compression type: zlib',
                       'lazy refcounts: false', 'refcount bits: 16',
-                      'corrupt: false' ]
+                      'corrupt: false', 'extended l2: false' ]
 
 class TestQCow3Lazy(TestQemuImgInfo):
     '''Testing a qcow2 version 3 image with lazy refcounts enabled'''
     img_options = 'compat=1.1,lazy_refcounts=on'
     json_compare = { 'compat': '1.1', 'lazy-refcounts': True,
                      'refcount-bits': 16, 'corrupt': False,
-                     'compression-type': 'zlib' }
+                     'compression-type': 'zlib', 'extended-l2': False }
     human_compare = [ 'compat: 1.1', 'compression type: zlib',
                       'lazy refcounts: true', 'refcount bits: 16',
-                      'corrupt: false' ]
+                      'corrupt: false', 'extended l2: false' ]
 
 class TestQCow3NotLazyQMP(TestQMP):
     '''Testing a qcow2 version 3 image with lazy refcounts disabled, opening
@@ -120,7 +120,7 @@ class TestQCow3NotLazyQMP(TestQMP):
     qemu_options = 'lazy-refcounts=on'
     compare = { 'compat': '1.1', 'lazy-refcounts': False,
                 'refcount-bits': 16, 'corrupt': False,
-                'compression-type': 'zlib' }
+                'compression-type': 'zlib', 'extended-l2': False }
 
 
 class TestQCow3LazyQMP(TestQMP):
@@ -130,7 +130,7 @@ class TestQCow3LazyQMP(TestQMP):
     qemu_options = 'lazy-refcounts=off'
     compare = { 'compat': '1.1', 'lazy-refcounts': True,
                 'refcount-bits': 16, 'corrupt': False,
-                'compression-type': 'zlib' }
+                'compression-type': 'zlib', 'extended-l2': False }
 
 TestImageInfoSpecific = None
 TestQemuImgInfo = None
diff --git a/tests/qemu-iotests/082.out b/tests/qemu-iotests/082.out
index 529a1214e1..efc0328e8d 100644
--- a/tests/qemu-iotests/082.out
+++ b/tests/qemu-iotests/082.out
@@ -3,14 +3,14 @@ QA output created by 082
 === create: Options specified more than once ===
 
 Testing: create -f foo -f qcow2 TEST_DIR/t.qcow2 128M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
 virtual size: 128 MiB (134217728 bytes)
 cluster_size: 65536
 
 Testing: create -f qcow2 -o cluster_size=4k -o lazy_refcounts=on 
TEST_DIR/t.qcow2 128M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=4096 
lazy_refcounts=on refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=4096 
lazy_refcounts=on extended_l2=off refcount_bits=16 compression_type=zlib
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
 virtual size: 128 MiB (134217728 bytes)
@@ -21,9 +21,10 @@ Format specific information:
     lazy refcounts: true
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Testing: create -f qcow2 -o cluster_size=4k -o lazy_refcounts=on -o 
cluster_size=8k TEST_DIR/t.qcow2 128M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=8192 
lazy_refcounts=on refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=8192 
lazy_refcounts=on extended_l2=off refcount_bits=16 compression_type=zlib
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
 virtual size: 128 MiB (134217728 bytes)
@@ -34,9 +35,10 @@ Format specific information:
     lazy refcounts: true
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Testing: create -f qcow2 -o cluster_size=4k,cluster_size=8k TEST_DIR/t.qcow2 
128M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=8192 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=8192 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
 virtual size: 128 MiB (134217728 bytes)
@@ -62,6 +64,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -86,6 +89,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -110,6 +114,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -134,6 +139,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -158,6 +164,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -182,6 +189,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -206,6 +214,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -230,6 +239,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -237,10 +247,10 @@ Supported options:
   size=<size>            - Virtual disk size
 
 Testing: create -f qcow2 -u -o backing_file=TEST_DIR/t.qcow2,,help 
TEST_DIR/t.qcow2 128M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2,,help cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2,,help cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 Testing: create -f qcow2 -u -o backing_file=TEST_DIR/t.qcow2,,? 
TEST_DIR/t.qcow2 128M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2,,? cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2,,? cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 Testing: create -f qcow2 -o backing_file=TEST_DIR/t.qcow2, -o help 
TEST_DIR/t.qcow2 128M
 qemu-img: Invalid option list: backing_file=TEST_DIR/t.qcow2,
@@ -269,6 +279,7 @@ Supported qcow2 options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -290,7 +301,7 @@ qemu-img: Format driver 'bochs' does not support image 
creation
 === convert: Options specified more than once ===
 
 Testing: create -f qcow2 TEST_DIR/t.qcow2 128M
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=134217728 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 Testing: convert -f foo -f qcow2 TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 image: TEST_DIR/t.IMGFMT.base
@@ -314,6 +325,7 @@ Format specific information:
     lazy refcounts: true
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Testing: convert -O qcow2 -o cluster_size=4k -o lazy_refcounts=on -o 
cluster_size=8k TEST_DIR/t.qcow2 TEST_DIR/t.qcow2.base
 image: TEST_DIR/t.IMGFMT.base
@@ -326,6 +338,7 @@ Format specific information:
     lazy refcounts: true
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Testing: convert -O qcow2 -o cluster_size=4k,cluster_size=8k TEST_DIR/t.qcow2 
TEST_DIR/t.qcow2.base
 image: TEST_DIR/t.IMGFMT.base
@@ -353,6 +366,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -377,6 +391,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -401,6 +416,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -425,6 +441,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -449,6 +466,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -473,6 +491,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -497,6 +516,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -521,6 +541,7 @@ Supported options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   nocow=<bool (on/off)>  - Turn off copy-on-write (valid only on btrfs)
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
@@ -560,6 +581,7 @@ Supported qcow2 options:
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -605,6 +627,7 @@ Format specific information:
     lazy refcounts: true
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Testing: amend -f qcow2 -o size=130M -o lazy_refcounts=off TEST_DIR/t.qcow2
 image: TEST_DIR/t.IMGFMT
@@ -617,6 +640,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Testing: amend -f qcow2 -o size=8M -o lazy_refcounts=on -o size=132M 
TEST_DIR/t.qcow2
 image: TEST_DIR/t.IMGFMT
@@ -629,6 +653,7 @@ Format specific information:
     lazy refcounts: true
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Testing: amend -f qcow2 -o size=4M,size=148M TEST_DIR/t.qcow2
 image: TEST_DIR/t.IMGFMT
@@ -656,6 +681,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -681,6 +707,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -706,6 +733,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -731,6 +759,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -756,6 +785,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -781,6 +811,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -806,6 +837,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -831,6 +863,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
@@ -873,6 +906,7 @@ Creation options for 'qcow2':
   encrypt.ivgen-hash-alg=<str> - Name of IV generator hash algorithm
   encrypt.key-secret=<str> - ID of secret providing qcow AES key or LUKS 
passphrase
   encryption=<bool (on/off)> - Encrypt the image with format 'aes'. 
(Deprecated in favor of encrypt.format=aes)
+  extended_l2=<bool (on/off)> - Extended L2 tables
   lazy_refcounts=<bool (on/off)> - Postpone refcount updates
   preallocation=<str>    - Preallocation mode (allowed values: off, metadata, 
falloc, full)
   refcount_bits=<num>    - Width of a reference count entry in bits
diff --git a/tests/qemu-iotests/085.out b/tests/qemu-iotests/085.out
index a822ff4ef6..0431743808 100644
--- a/tests/qemu-iotests/085.out
+++ b/tests/qemu-iotests/085.out
@@ -13,7 +13,7 @@ Formatting 'TEST_DIR/t.IMGFMT.2', fmt=IMGFMT size=134217728
 === Create a single snapshot on virtio0 ===
 
 { 'execute': 'blockdev-snapshot-sync', 'arguments': { 'device': 'virtio0', 
'snapshot-file':'TEST_DIR/1-snapshot-v0.IMGFMT', 'format': 'IMGFMT' } }
-Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2.1 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2.1 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 
 === Invalid command - missing device and nodename ===
@@ -30,40 +30,40 @@ Formatting 'TEST_DIR/1-snapshot-v0.qcow2', fmt=qcow2 
size=134217728 backing_file
 === Create several transactional group snapshots ===
 
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/2-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/2-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/2-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/1-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/2-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2.2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/2-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/1-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/2-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/t.qcow2.2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/3-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/3-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/3-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/2-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/3-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/2-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/3-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/2-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/3-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/2-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/4-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/4-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/4-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/3-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/4-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/3-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/4-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/3-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/4-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/3-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/5-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/5-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/5-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/4-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/5-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/4-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/5-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/4-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/5-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/4-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/6-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/6-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/6-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/5-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/6-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/5-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/6-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/5-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/6-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/5-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/7-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/7-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/7-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/6-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/7-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/6-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/7-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/6-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/7-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/6-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/8-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/8-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/8-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/7-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/8-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/7-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/8-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/7-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/8-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/7-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/9-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 'data' 
: { 'device': 'virtio1', 'snapshot-file': 'TEST_DIR/9-snapshot-v1.IMGFMT' } } ] 
} }
-Formatting 'TEST_DIR/9-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/8-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/9-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/8-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/9-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/8-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/9-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/8-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'transaction', 'arguments': {'actions': [ { 'type': 
'blockdev-snapshot-sync', 'data' : { 'device': 'virtio0', 'snapshot-file': 
'TEST_DIR/10-snapshot-v0.IMGFMT' } }, { 'type': 'blockdev-snapshot-sync', 
'data' : { 'device': 'virtio1', 'snapshot-file': 
'TEST_DIR/10-snapshot-v1.IMGFMT' } } ] } }
-Formatting 'TEST_DIR/10-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/9-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
-Formatting 'TEST_DIR/10-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/9-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/10-snapshot-v0.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/9-snapshot-v0.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/10-snapshot-v1.qcow2', fmt=qcow2 size=134217728 
backing_file=TEST_DIR/9-snapshot-v1.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 
 === Create a couple of snapshots using blockdev-snapshot ===
diff --git a/tests/qemu-iotests/144.out b/tests/qemu-iotests/144.out
index 885a8874a5..a2627f0cc5 100644
--- a/tests/qemu-iotests/144.out
+++ b/tests/qemu-iotests/144.out
@@ -9,7 +9,7 @@ Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=536870912
 { 'execute': 'qmp_capabilities' }
 {"return": {}}
 { 'execute': 'blockdev-snapshot-sync', 'arguments': { 'device': 'virtio0', 
'snapshot-file':'TEST_DIR/tmp.IMGFMT', 'format': 'IMGFMT' } }
-Formatting 'TEST_DIR/tmp.qcow2', fmt=qcow2 size=536870912 
backing_file=TEST_DIR/t.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/tmp.qcow2', fmt=qcow2 size=536870912 
backing_file=TEST_DIR/t.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 
 === Performing block-commit on active layer ===
@@ -31,6 +31,6 @@ Formatting 'TEST_DIR/tmp.qcow2', fmt=qcow2 size=536870912 
backing_file=TEST_DIR/
 === Performing Live Snapshot 2 ===
 
 { 'execute': 'blockdev-snapshot-sync', 'arguments': { 'device': 'virtio0', 
'snapshot-file':'TEST_DIR/tmp2.IMGFMT', 'format': 'IMGFMT' } }
-Formatting 'TEST_DIR/tmp2.qcow2', fmt=qcow2 size=536870912 
backing_file=TEST_DIR/t.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/tmp2.qcow2', fmt=qcow2 size=536870912 
backing_file=TEST_DIR/t.qcow2 backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 *** done
diff --git a/tests/qemu-iotests/182.out b/tests/qemu-iotests/182.out
index ae43654d32..e4290ec028 100644
--- a/tests/qemu-iotests/182.out
+++ b/tests/qemu-iotests/182.out
@@ -13,7 +13,7 @@ Is another process using the image [TEST_DIR/t.qcow2]?
 {'execute': 'blockdev-add', 'arguments': { 'node-name': 'node0', 'driver': 
'file', 'filename': 'TEST_DIR/t.IMGFMT', 'locking': 'on' } }
 {"return": {}}
 {'execute': 'blockdev-snapshot-sync', 'arguments': { 'node-name': 'node0', 
'snapshot-file': 'TEST_DIR/t.IMGFMT.overlay', 'snapshot-node-name': 'node1' } }
-Formatting 'TEST_DIR/t.qcow2.overlay', fmt=qcow2 size=197120 
backing_file=TEST_DIR/t.qcow2 backing_fmt=file cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2.overlay', fmt=qcow2 size=197120 
backing_file=TEST_DIR/t.qcow2 backing_fmt=file cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 {'execute': 'blockdev-add', 'arguments': { 'node-name': 'node1', 'driver': 
'file', 'filename': 'TEST_DIR/t.IMGFMT', 'locking': 'on' } }
 {"return": {}}
diff --git a/tests/qemu-iotests/185.out b/tests/qemu-iotests/185.out
index ac5ab16bc8..4e0f018bf2 100644
--- a/tests/qemu-iotests/185.out
+++ b/tests/qemu-iotests/185.out
@@ -9,14 +9,14 @@ Formatting 'TEST_DIR/t.IMGFMT.base', fmt=IMGFMT size=67108864
 === Creating backing chain ===
 
 { 'execute': 'blockdev-snapshot-sync', 'arguments': { 'device': 'disk', 
'snapshot-file': 'TEST_DIR/t.IMGFMT.mid', 'format': 'IMGFMT', 'mode': 
'absolute-paths' } }
-Formatting 'TEST_DIR/t.qcow2.mid', fmt=qcow2 size=67108864 
backing_file=TEST_DIR/t.qcow2.base backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2.mid', fmt=qcow2 size=67108864 
backing_file=TEST_DIR/t.qcow2.base backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 { 'execute': 'human-monitor-command', 'arguments': { 'command-line': 'qemu-io 
disk "write 0 4M"' } }
 wrote 4194304/4194304 bytes at offset 0
 4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 {"return": ""}
 { 'execute': 'blockdev-snapshot-sync', 'arguments': { 'device': 'disk', 
'snapshot-file': 'TEST_DIR/t.IMGFMT', 'format': 'IMGFMT', 'mode': 
'absolute-paths' } }
-Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 
backing_file=TEST_DIR/t.qcow2.mid backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 
backing_file=TEST_DIR/t.qcow2.mid backing_fmt=qcow2 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"return": {}}
 
 === Start commit job and exit qemu ===
@@ -48,7 +48,7 @@ Formatting 'TEST_DIR/t.qcow2', fmt=qcow2 size=67108864 
backing_file=TEST_DIR/t.q
 { 'execute': 'qmp_capabilities' }
 {"return": {}}
 { 'execute': 'drive-mirror', 'arguments': { 'device': 'disk', 'target': 
'TEST_DIR/t.IMGFMT.copy', 'format': 'IMGFMT', 'sync': 'full', 'speed': 65536 } }
-Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=67108864 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=67108864 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": 
"JOB_STATUS_CHANGE", "data": {"status": "created", "id": "disk"}}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": 
"JOB_STATUS_CHANGE", "data": {"status": "running", "id": "disk"}}
 {"return": {}}
@@ -62,7 +62,7 @@ Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=67108864 
cluster_size=65536 l
 { 'execute': 'qmp_capabilities' }
 {"return": {}}
 { 'execute': 'drive-backup', 'arguments': { 'device': 'disk', 'target': 
'TEST_DIR/t.IMGFMT.copy', 'format': 'IMGFMT', 'sync': 'full', 'speed': 65536 } }
-Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=67108864 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/t.qcow2.copy', fmt=qcow2 size=67108864 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": 
"JOB_STATUS_CHANGE", "data": {"status": "created", "id": "disk"}}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": 
"JOB_STATUS_CHANGE", "data": {"status": "running", "id": "disk"}}
 {"timestamp": {"seconds":  TIMESTAMP, "microseconds":  TIMESTAMP}, "event": 
"JOB_STATUS_CHANGE", "data": {"status": "paused", "id": "disk"}}
diff --git a/tests/qemu-iotests/198.out b/tests/qemu-iotests/198.out
index 6280ae6eed..821a052bb1 100644
--- a/tests/qemu-iotests/198.out
+++ b/tests/qemu-iotests/198.out
@@ -73,6 +73,7 @@ Format specific information:
                 key offset: 1810432
         payload offset: 2068480
         master key iters: 1024
+    extended l2: false
 
 == checking image layer ==
 image: json:{ /* filtered */ }
@@ -117,4 +118,5 @@ Format specific information:
                 key offset: 1810432
         payload offset: 2068480
         master key iters: 1024
+    extended l2: false
 *** done
diff --git a/tests/qemu-iotests/206.out b/tests/qemu-iotests/206.out
index 1a14255a83..363c5abe35 100644
--- a/tests/qemu-iotests/206.out
+++ b/tests/qemu-iotests/206.out
@@ -22,6 +22,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 === Successful image creation (inline blockdev-add, explicit defaults) ===
 
@@ -45,6 +46,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 === Successful image creation (v3 non-default options) ===
 
@@ -68,6 +70,7 @@ Format specific information:
     lazy refcounts: true
     refcount bits: 1
     corrupt: false
+    extended l2: false
 
 === Successful image creation (v2 non-default options) ===
 
@@ -146,6 +149,7 @@ Format specific information:
         payload offset: 528384
         master key iters: XXX
     corrupt: false
+    extended l2: false
 
 === Invalid BlockdevRef ===
 
diff --git a/tests/qemu-iotests/242.out b/tests/qemu-iotests/242.out
index 091b9126ce..3759c99284 100644
--- a/tests/qemu-iotests/242.out
+++ b/tests/qemu-iotests/242.out
@@ -16,6 +16,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 No bitmap in JSON format output
 
@@ -42,6 +43,7 @@ Format specific information:
             granularity: 32768
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 The same bitmaps in JSON format:
 [
@@ -80,6 +82,7 @@ Format specific information:
             granularity: 65536
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 The same bitmaps in JSON format:
 [
@@ -123,6 +126,7 @@ Format specific information:
             granularity: 65536
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 The same bitmaps in JSON format:
 [
@@ -167,5 +171,6 @@ Format specific information:
             granularity: 16384
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 Test complete
diff --git a/tests/qemu-iotests/255.out b/tests/qemu-iotests/255.out
index a3c99fd62e..38ac1a4e95 100644
--- a/tests/qemu-iotests/255.out
+++ b/tests/qemu-iotests/255.out
@@ -3,9 +3,9 @@ Finishing a commit job with background reads
 
 === Create backing chain and start VM ===
 
-Formatting 'TEST_DIR/PID-t.qcow2.mid', fmt=qcow2 size=134217728 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-t.qcow2.mid', fmt=qcow2 size=134217728 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
-Formatting 'TEST_DIR/PID-t.qcow2', fmt=qcow2 size=134217728 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-t.qcow2', fmt=qcow2 size=134217728 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 === Start background read requests ===
 
@@ -23,9 +23,9 @@ Closing the VM while a job is being cancelled
 
 === Create images and start VM ===
 
-Formatting 'TEST_DIR/PID-src.qcow2', fmt=qcow2 size=134217728 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-src.qcow2', fmt=qcow2 size=134217728 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
-Formatting 'TEST_DIR/PID-dst.qcow2', fmt=qcow2 size=134217728 
cluster_size=65536 lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-dst.qcow2', fmt=qcow2 size=134217728 
cluster_size=65536 lazy_refcounts=off extended_l2=off refcount_bits=16 
compression_type=zlib
 
 wrote 1048576/1048576 bytes at offset 0
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
diff --git a/tests/qemu-iotests/274.out b/tests/qemu-iotests/274.out
index d24ff681af..47edc3c423 100644
--- a/tests/qemu-iotests/274.out
+++ b/tests/qemu-iotests/274.out
@@ -1,9 +1,9 @@
 == Commit tests ==
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 
backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 
backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 2097152/2097152 bytes at offset 0
 2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -56,6 +56,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 read 1048576/1048576 bytes at offset 0
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -64,11 +65,11 @@ read 1048576/1048576 bytes at offset 1048576
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
 === Testing HMP commit (top -> mid) ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 
backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 
backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 2097152/2097152 bytes at offset 0
 2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -86,6 +87,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 read 1048576/1048576 bytes at offset 0
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -94,11 +96,11 @@ read 1048576/1048576 bytes at offset 1048576
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
 
 === Testing QMP active commit (top -> mid) ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=2097152 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-mid', fmt=qcow2 size=1048576 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 
backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=2097152 
backing_file=TEST_DIR/PID-mid cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 2097152/2097152 bytes at offset 0
 2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -122,6 +124,7 @@ Format specific information:
     lazy refcounts: false
     refcount bits: 16
     corrupt: false
+    extended l2: false
 
 read 1048576/1048576 bytes at offset 0
 1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -131,9 +134,9 @@ read 1048576/1048576 bytes at offset 1048576
 
 == Resize tests ==
 === preallocation=off ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=6442450944 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=6442450944 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=1073741824 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=1073741824 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 65536/65536 bytes at offset 5368709120
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -150,9 +153,9 @@ read 65536/65536 bytes at offset 5368709120
 { "start": 1073741824, "length": 7516192768, "depth": 0, "zero": true, "data": 
false}]
 
 === preallocation=metadata ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=34359738368 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=34359738368 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=32212254720 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=32212254720 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 65536/65536 bytes at offset 33285996544
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -174,9 +177,9 @@ read 65536/65536 bytes at offset 33285996544
 { "start": 34896609280, "length": 536870912, "depth": 0, "zero": true, "data": 
false, "offset": 2685075456}]
 
 === preallocation=falloc ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=10485760 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=10485760 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=5242880 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=5242880 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 65536/65536 bytes at offset 9437184
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -193,9 +196,9 @@ read 65536/65536 bytes at offset 9437184
 { "start": 5242880, "length": 10485760, "depth": 0, "zero": false, "data": 
true, "offset": 327680}]
 
 === preallocation=full ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=16777216 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=16777216 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=8388608 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=8388608 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 65536/65536 bytes at offset 11534336
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -212,9 +215,9 @@ read 65536/65536 bytes at offset 11534336
 { "start": 8388608, "length": 4194304, "depth": 0, "zero": false, "data": 
true, "offset": 327680}]
 
 === preallocation=off ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=393216 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=393216 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=259072 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=259072 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 65536/65536 bytes at offset 259072
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -232,9 +235,9 @@ read 65536/65536 bytes at offset 259072
 { "start": 262144, "length": 262144, "depth": 0, "zero": true, "data": false}]
 
 === preallocation=off ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=409600 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=409600 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=262144 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=262144 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 65536/65536 bytes at offset 344064
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
@@ -251,9 +254,9 @@ read 65536/65536 bytes at offset 344064
 { "start": 262144, "length": 262144, "depth": 0, "zero": true, "data": false}]
 
 === preallocation=off ===
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=524288 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=524288 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
-Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=262144 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-top', fmt=qcow2 size=262144 
backing_file=TEST_DIR/PID-base cluster_size=65536 lazy_refcounts=off 
extended_l2=off refcount_bits=16 compression_type=zlib
 
 wrote 65536/65536 bytes at offset 446464
 64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
diff --git a/tests/qemu-iotests/280.out b/tests/qemu-iotests/280.out
index 92e4d14079..372e9f70ad 100644
--- a/tests/qemu-iotests/280.out
+++ b/tests/qemu-iotests/280.out
@@ -1,4 +1,4 @@
-Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=67108864 cluster_size=65536 
lazy_refcounts=off refcount_bits=16 compression_type=zlib
+Formatting 'TEST_DIR/PID-base', fmt=qcow2 size=67108864 cluster_size=65536 
lazy_refcounts=off extended_l2=off refcount_bits=16 compression_type=zlib
 
 === Launch VM ===
 Enabling migration QMP events on VM...
diff --git a/tests/qemu-iotests/291.out b/tests/qemu-iotests/291.out
index 08bfaaaa6b..83e3ec821c 100644
--- a/tests/qemu-iotests/291.out
+++ b/tests/qemu-iotests/291.out
@@ -22,7 +22,7 @@ data                      'qcow2'
 
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 Header extension:
@@ -60,6 +60,7 @@ Format specific information:
             granularity: 65536
     refcount bits: 16
     corrupt: false
+    extended l2: false
 image: TEST_DIR/t.IMGFMT
 file format: IMGFMT
 virtual size: 10 MiB (10485760 bytes)
@@ -84,10 +85,11 @@ Format specific information:
             granularity: 65536
     refcount bits: 16
     corrupt: false
+    extended l2: false
 Check resulting qcow2 header extensions:
 Header extension:
 magic                     0x6803f857 (Feature table)
-length                    336
+length                    384
 data                      <binary>
 
 Header extension:
diff --git a/tests/qemu-iotests/common.filter b/tests/qemu-iotests/common.filter
index 03e4f71808..2ca66de0f0 100644
--- a/tests/qemu-iotests/common.filter
+++ b/tests/qemu-iotests/common.filter
@@ -146,6 +146,7 @@ _filter_img_create()
         -e "s# adapter_type=[^ ]*##g" \
         -e "s# hwversion=[^ ]*##g" \
         -e "s# lazy_refcounts=\\(on\\|off\\)##g" \
+        -e "s# extended_l2=\\(on\\|off\\)##g" \
         -e "s# block_size=[0-9]\\+##g" \
         -e "s# block_state_zero=\\(on\\|off\\)##g" \
         -e "s# log_size=[0-9]\\+##g" \
-- 
2.20.1




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