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dirty-bitmap: improve bdrv_dirty_bitmap_next_zero

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Add bytes parameter to the function, to limit searched range.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2019-01-15 18:26:49 -05:00 • committed by John Snow
parent 4b9f0b0f7c
commit 76d570dc49
7 changed files with 38 additions and 14 deletions
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10
include/qemu/hbitmap.h
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@ -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.