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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2018-03-13 15:34:00 -0400 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2018-03-13 17:04:54 -0400 |
| commit | 044ee8e143576abd72acf452080e8da531fb13c8 (patch) | |
| tree | 76dc801405afe2e5f2844e552efc456dc8666ff1 | |
| parent | 604ab74bb5cfb48ca67bef7537b38faf142f67dc (diff) | |
| download | focaccia-qemu-044ee8e143576abd72acf452080e8da531fb13c8.tar.gz focaccia-qemu-044ee8e143576abd72acf452080e8da531fb13c8.zip | |
block/dirty-bitmap: add _locked version of bdrv_reclaim_dirty_bitmap
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 20180207155837.92351-4-vsementsov@virtuozzo.com Signed-off-by: John Snow <jsnow@redhat.com>
| -rw-r--r-- | block/dirty-bitmap.c | 28 | ||||
| -rw-r--r-- | include/block/dirty-bitmap.h | 3 |
2 files changed, 21 insertions, 10 deletions
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 75435f6c2f..ce00ff3474 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -320,17 +320,13 @@ BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs, * In cases of failure where we can no longer safely delete the parent, * we may wish to re-join the parent and child/successor. * The merged parent will be un-frozen, but not explicitly re-enabled. - * Called with BQL taken. + * Called within bdrv_dirty_bitmap_lock..unlock and with BQL taken. */ -BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, - BdrvDirtyBitmap *parent, - Error **errp) +BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs, + BdrvDirtyBitmap *parent, + Error **errp) { - BdrvDirtyBitmap *successor; - - qemu_mutex_lock(parent->mutex); - - successor = parent->successor; + BdrvDirtyBitmap *successor = parent->successor; if (!successor) { error_setg(errp, "Cannot reclaim a successor when none is present"); @@ -344,9 +340,21 @@ BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, bdrv_release_dirty_bitmap_locked(bs, successor); parent->successor = NULL; + return parent; +} + +/* Called with BQL taken. */ +BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs, + BdrvDirtyBitmap *parent, + Error **errp) +{ + BdrvDirtyBitmap *ret; + + qemu_mutex_lock(parent->mutex); + ret = bdrv_reclaim_dirty_bitmap_locked(bs, parent, errp); qemu_mutex_unlock(parent->mutex); - return parent; + return ret; } /** diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h index e0ebc96b01..5c239be74d 100644 --- a/include/block/dirty-bitmap.h +++ b/include/block/dirty-bitmap.h @@ -93,5 +93,8 @@ 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); +BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BlockDriverState *bs, + BdrvDirtyBitmap *bitmap, + Error **errp); #endif |