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parallels: mark driver as supporting CBT 

Parallels driver indeed support Parallels Dirty Bitmap Feature in
read-only mode. The patch adds bdrv_supports_persistent_dirty_bitmap()
callback which always return 1 to indicate that.

This will allow to copy CBT from Parallels image with qemu-img.

Note: read-write support is signalled through
bdrv_co_can_store_new_dirty_bitmap() and is different.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
This commit is contained in:
Denis V. Lunev 2023-09-18 20:00:39 +02:00
parent bb16991fe0
commit 73f3e13692
1 changed files with 6 additions and 0 deletions
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6
block/parallels.c
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@ -1248,6 +1248,11 @@ static void parallels_close(BlockDriverState *bs)
error_free(s->migration_blocker); error_free(s->migration_blocker);
} }
static bool parallels_is_support_dirty_bitmaps(BlockDriverState *bs)
{
return 1;
}
static BlockDriver bdrv_parallels = { static BlockDriver bdrv_parallels = {
.format_name = "parallels", .format_name = "parallels",
.instance_size = sizeof(BDRVParallelsState), .instance_size = sizeof(BDRVParallelsState),
@ -1256,6 +1261,7 @@ static BlockDriver bdrv_parallels = {
.supports_backing = true, .supports_backing = true,
.bdrv_has_zero_init = bdrv_has_zero_init_1, .bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_supports_persistent_dirty_bitmap = parallels_is_support_dirty_bitmaps,
.bdrv_probe = parallels_probe, .bdrv_probe = parallels_probe,
.bdrv_open = parallels_open, .bdrv_open = parallels_open,