The function checks existing of the bitmap without loading it. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com> --- block/dirty-bitmap.c | 15 +++++++++++++++ block/qcow2-dirty-bitmap.c | 5 +++++ block/qcow2.c | 1 + block/qcow2.h | 1 + include/block/block_int.h | 2 ++ include/block/dirty-bitmap.h | 1 + 6 files changed, 25 insertions(+)
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 982f930..115efb8 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -514,3 +514,18 @@ int bdrv_dirty_bitmap_store(const BdrvDirtyBitmap *bitmap, BlockDriverState *bs, { return hbitmap_store(bitmap->bitmap, bs, table, table_size, cluster_size); } + +bool bdrv_load_check_dirty_bitmap(BlockDriverState *file, const char *name) +{ + BlockDriver *drv = file->drv; + if (!drv) { + return false; + } + if (drv->bdrv_dirty_bitmap_load_check) { + return drv->bdrv_dirty_bitmap_load_check(file, name); + } + if (file->file) { + return bdrv_load_check_dirty_bitmap(file->file->bs, name); + } + return false; +} diff --git a/block/qcow2-dirty-bitmap.c b/block/qcow2-dirty-bitmap.c index 979e17e..9f8ad6b 100644 --- a/block/qcow2-dirty-bitmap.c +++ b/block/qcow2-dirty-bitmap.c @@ -274,6 +274,11 @@ static int load_bitmap_data(BlockDriverState *bs, const uint64_t *bitmap_table, return ret; } +bool qcow2_bitmap_load_check(BlockDriverState *file, const char *name) +{ + return find_bitmap_by_name(file, name) != NULL; +} + static BdrvDirtyBitmap *load_bitmap(BlockDriverState *bs, QCow2Bitmap *bm, Error **errp) { diff --git a/block/qcow2.c b/block/qcow2.c index 6b6914d..0e75eeb 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3436,6 +3436,7 @@ BlockDriver bdrv_qcow2 = { .bdrv_get_specific_info = qcow2_get_specific_info, .bdrv_dirty_bitmap_load = qcow2_bitmap_load, + .bdrv_dirty_bitmap_load_check = qcow2_bitmap_load_check, .bdrv_dirty_bitmap_store = qcow2_bitmap_store, .bdrv_save_vmstate = qcow2_save_vmstate, diff --git a/block/qcow2.h b/block/qcow2.h index e4a517c..423c279 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -620,6 +620,7 @@ int qcow2_read_snapshots(BlockDriverState *bs); void qcow2_free_bitmaps(BlockDriverState *bs); int qcow2_read_bitmaps(BlockDriverState *bs, Error **errp); +bool qcow2_bitmap_load_check(BlockDriverState *file, const char *name); BdrvDirtyBitmap *qcow2_bitmap_load(BlockDriverState *bs, const char *name, Error **errp); void qcow2_bitmap_store(BlockDriverState *bs, const BdrvDirtyBitmap *bitmap, diff --git a/include/block/block_int.h b/include/block/block_int.h index be8f8a3..59948e9 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -214,6 +214,8 @@ struct BlockDriver { int (*bdrv_get_info)(BlockDriverState *bs, BlockDriverInfo *bdi); ImageInfoSpecific *(*bdrv_get_specific_info)(BlockDriverState *bs); + bool (*bdrv_dirty_bitmap_load_check)(BlockDriverState *file, + const char *name); BdrvDirtyBitmap *(*bdrv_dirty_bitmap_load)(BlockDriverState *bs, const char *name, Error **errp); diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 1e16a5f..5d8c2c1 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -78,5 +78,6 @@ int bdrv_dirty_bitmap_prepare_store(const BdrvDirtyBitmap *bitmap, int bdrv_dirty_bitmap_store(const BdrvDirtyBitmap *bitmap, BlockDriverState *bs, const uint64_t *table, uint32_t table_size, uint32_t cluster_size); +bool bdrv_load_check_dirty_bitmap(BlockDriverState *file, const char *name); #endif -- 1.8.3.1