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
Reviewed-by: Eric Blake
Reviewed-by: Max Reitz
---
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_SIZE512
diff --git a/block/qcow2.c b/block/qcow2.c
index 04572f39e1..3dfb56ccca 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1438
