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block/dirty-bitmap: introduce bdrv_dirty_bitmap_status()

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Add a convenient function similar with bdrv_block_status() to get
status of dirty bitmap.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220303194349.2304213-9-vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2022-03-03 20:43:41 +01:00 • committed by Hanna Reitz
parent 84b1e80f67
commit a6426475a7
4 changed files with 53 additions and 0 deletions
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12
include/qemu/hbitmap.h
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@ -340,6 +340,18 @@ bool hbitmap_next_dirty_area(const HBitmap *hb, int64_t start, int64_t end,
int64_t max_dirty_count,
int64_t *dirty_start, int64_t *dirty_count);
/*
* bdrv_dirty_bitmap_status:
* @hb: The HBitmap to operate on
* @start: The bit to start from
* @count: Number of bits to proceed
* @pnum: Out-parameter. How many bits has same value starting from @start
*
* Returns true if bitmap is dirty at @start, false otherwise.
*/
bool hbitmap_status(const HBitmap *hb, int64_t start, int64_t count,
int64_t *pnum);
/**
* hbitmap_iter_next:
* @hbi: HBitmapIter to operate on.