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qcow2: Add support for ImageInfoSpecific

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Add a new ImageInfoSpecificQCow2 type as a subtype of ImageInfoSpecific.
This contains the compatibility level as a string and an optional
lazy_refcounts boolean (optional means mandatory for compat >= 1.1 and
not available for compat == 0.10).

Also, add qcow2_get_specific_info, which returns this information.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz 2013-10-09 10:46:18 +02:00 committed by Kevin Wolf
parent a8d8ecb77f
commit 37764dfb71
2 changed files with 44 additions and 0 deletions
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28
block/qcow2.c
View File

@ -1810,6 +1810,33 @@ static int qcow2_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
return 0;
}
static ImageInfoSpecific *qcow2_get_specific_info(BlockDriverState *bs)
{
BDRVQcowState *s = bs->opaque;
ImageInfoSpecific *spec_info = g_new(ImageInfoSpecific, 1);
*spec_info = (ImageInfoSpecific){
.kind = IMAGE_INFO_SPECIFIC_KIND_QCOW2,
{
.qcow2 = g_new(ImageInfoSpecificQCow2, 1),
},
};
if (s->qcow_version == 2) {
*spec_info->qcow2 = (ImageInfoSpecificQCow2){
.compat = g_strdup("0.10"),
};
} else if (s->qcow_version == 3) {
*spec_info->qcow2 = (ImageInfoSpecificQCow2){
.compat = g_strdup("1.1"),
.lazy_refcounts = s->compatible_features &
QCOW2_COMPAT_LAZY_REFCOUNTS,
.has_lazy_refcounts = true,
};
}
return spec_info;
}
#if 0
static void dump_refcounts(BlockDriverState *bs)
{
@ -2130,6 +2157,7 @@ static BlockDriver bdrv_qcow2 = {
.bdrv_snapshot_list = qcow2_snapshot_list,
.bdrv_snapshot_load_tmp = qcow2_snapshot_load_tmp,
.bdrv_get_info = qcow2_get_info,
.bdrv_get_specific_info = qcow2_get_specific_info,
.bdrv_save_vmstate = qcow2_save_vmstate,
.bdrv_load_vmstate = qcow2_load_vmstate,

16
qapi-schema.json
View File

@ -209,6 +209,21 @@
'date-sec': 'int', 'date-nsec': 'int',
'vm-clock-sec': 'int', 'vm-clock-nsec': 'int' } }
##
# @ImageInfoSpecificQCow2:
#
# @compat: compatibility level
#
# @lazy-refcounts: #optional on or off; only valid for compat >= 1.1
#
# Since: 1.7
##
{ 'type': 'ImageInfoSpecificQCow2',
'data': {
'compat': 'str',
'*lazy-refcounts': 'bool'
} }
##
# @ImageInfoSpecific:
#
@ -219,6 +234,7 @@
{ 'union': 'ImageInfoSpecific',
'data': {
'qcow2': 'ImageInfoSpecificQCow2'
} }
##