diff options
| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2019-01-15 18:26:49 -0500 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2019-01-15 18:26:49 -0500 |
| commit | 76d570dc495c56bbdcc4574bfc6d512dcb8e9aa9 (patch) | |
| tree | 80b114f05c7c9f30dcd1655cfa50c1f1330572d2 /include | |
| parent | 4b9f0b0f7c84eea2dfb0d5be3e0254bc91319dbc (diff) | |
dirty-bitmap: improve bdrv_dirty_bitmap_next_zero
Add bytes parameter to the function, to limit searched range.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/block/dirty-bitmap.h | 3 | ||||
| -rw-r--r-- | include/qemu/hbitmap.h | 10 |
2 files changed, 9 insertions, 4 deletions
diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index 8f38a3dec1..102ccdda32 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -99,7 +99,8 @@ 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); +int64_t bdrv_dirty_bitmap_next_zero(BdrvDirtyBitmap *bitmap, uint64_t offset, + uint64_t bytes); BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, Error **errp); diff --git a/include/qemu/hbitmap.h b/include/qemu/hbitmap.h index a7cb780592..135975530f 100644 --- a/include/qemu/hbitmap.h +++ b/include/qemu/hbitmap.h @@ -300,12 +300,16 @@ void hbitmap_iter_init(HBitmapIter *hbi, const HBitmap *hb, uint64_t first); unsigned long hbitmap_iter_skip_words(HBitmapIter *hbi); /* hbitmap_next_zero: + * + * Find next not dirty bit within selected range. If not found, return -1. + * * @hb: The HBitmap to operate on * @start: The bit to start from. - * - * Find next not dirty bit. + * @count: Number of bits to proceed. If @start+@count > bitmap size, the whole + * bitmap is looked through. You can use UINT64_MAX as @count to search up to + * the bitmap end. */ -int64_t hbitmap_next_zero(const HBitmap *hb, uint64_t start); +int64_t hbitmap_next_zero(const HBitmap *hb, uint64_t start, uint64_t count); /* hbitmap_create_meta: * Create a "meta" hbitmap to track dirtiness of the bits in this HBitmap. |