diff options
| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2017-10-12 16:53:09 +0300 |
|---|---|---|
| committer | Jeff Cody <jcody@redhat.com> | 2017-12-18 10:54:13 -0500 |
| commit | 56207df55ea546f3e72578a5920e68a346440b1a (patch) | |
| tree | f3402035ecf937a994f7567663c54408e66939bf /include | |
| parent | 411ad78115ebeb3411cf4b7622784b93dfabe259 (diff) | |
hbitmap: add next_zero function
The function searches for next zero bit.
Also add interface for BdrvDirtyBitmap and unit test.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20171012135313.227864-2-vsementsov@virtuozzo.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/dirty-bitmap.h | 1 | ||||
| -rw-r--r-- | include/qemu/hbitmap.h | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 3579a7597c..a591c27213 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -91,5 +91,6 @@ bool bdrv_has_changed_persistent_bitmaps(BlockDriverState *bs); BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BlockDriverState *bs, BdrvDirtyBitmap *bitmap); char *bdrv_dirty_bitmap_sha256(const BdrvDirtyBitmap *bitmap, Error **errp); +int64_t bdrv_dirty_bitmap_next_zero(BdrvDirtyBitmap *bitmap, uint64_t start); #endif diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h index 81e78043d1..6b6490ecad 100644 --- a/include/qemu/hbitmap.h +++ b/include/qemu/hbitmap.h @@ -292,6 +292,14 @@ void hbitmap_iter_init(HBitmapIter *hbi, const HBitmap *hb, uint64_t first); */ unsigned long hbitmap_iter_skip_words(HBitmapIter *hbi); +/* hbitmap_next_zero: + * @hb: The HBitmap to operate on + * @start: The bit to start from. + * + * Find next not dirty bit. + */ +int64_t hbitmap_next_zero(const HBitmap *hb, uint64_t start); + /* hbitmap_create_meta: * Create a "meta" hbitmap to track dirtiness of the bits in this HBitmap. * The caller owns the created bitmap and must call hbitmap_free_meta(hb) to |