diff options
Diffstat (limited to 'block/dirty-bitmap.c')
| -rw-r--r-- | block/dirty-bitmap.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 017ee9db46..8ac933cf1c 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -314,7 +314,7 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs, return NULL; } - if (!hbitmap_merge(parent->bitmap, successor->bitmap)) { + if (!hbitmap_merge(parent->bitmap, successor->bitmap, parent->bitmap)) { error_setg(errp, "Merging of parent and successor bitmap failed"); return NULL; } @@ -791,8 +791,10 @@ int64_t bdrv_dirty_bitmap_next_zero(BdrvDirtyBitmap *bitmap, uint64_t offset) } void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src, - Error **errp) + HBitmap **backup, Error **errp) { + bool ret; + /* only bitmaps from one bds are supported */ assert(dest->mutex == src->mutex); @@ -810,11 +812,20 @@ void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src, goto out; } - if (!hbitmap_merge(dest->bitmap, src->bitmap)) { + if (!hbitmap_can_merge(dest->bitmap, src->bitmap)) { error_setg(errp, "Bitmaps are incompatible and can't be merged"); goto out; } + if (backup) { + *backup = dest->bitmap; + dest->bitmap = hbitmap_alloc(dest->size, hbitmap_granularity(*backup)); + ret = hbitmap_merge(*backup, src->bitmap, dest->bitmap); + } else { + ret = hbitmap_merge(dest->bitmap, src->bitmap, dest->bitmap); + } + assert(ret); + out: qemu_mutex_unlock(dest->mutex); } |