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authorVladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>2017-06-28 15:05:27 +0300
committerMax Reitz <mreitz@redhat.com>2017-07-11 17:44:59 +0200
commit56f364e6d745e46c9f6686df9a5d512d32e182ad (patch)
treeeab33b954b490e619039f99ce66de027cfeaa5e1 /block/dirty-bitmap.c
parentfc905d3a0cd527e70af5fcce19c43596b7f5c046 (diff)
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block/dirty-bitmap: add bdrv_remove_persistent_dirty_bitmap
Interface for removing persistent bitmap from its storage. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 20170628120530.31251-28-vsementsov@virtuozzo.com Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/dirty-bitmap.c')
-rw-r--r--block/dirty-bitmap.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 5fcf917..b2ca78b 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -395,6 +395,7 @@ void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
/**
* Release all named dirty bitmaps attached to a BDS (for use in bdrv_close()).
* There must not be any frozen bitmaps attached.
+ * This function does not remove persistent bitmaps from the storage.
* Called with BQL taken.
*/
void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs)
@@ -402,6 +403,23 @@ void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs)
bdrv_do_release_matching_dirty_bitmap(bs, NULL, true);
}
+/**
+ * Remove persistent dirty bitmap from the storage if it exists.
+ * Absence of bitmap is not an error, because we have the following scenario:
+ * BdrvDirtyBitmap can have .persistent = true but not yet saved and have no
+ * stored version. For such bitmap bdrv_remove_persistent_dirty_bitmap() should
+ * not fail.
+ * This function doesn't release corresponding BdrvDirtyBitmap.
+ */
+void bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs,
+ const char *name,
+ Error **errp)
+{
+ if (bs->drv && bs->drv->bdrv_remove_persistent_dirty_bitmap) {
+ bs->drv->bdrv_remove_persistent_dirty_bitmap(bs, name, errp);
+ }
+}
+
/* Called with BQL taken. */
void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
{