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[Qemu-devel] [PATCH v16 20/22] block/dirty-bitmap: add bdrv_remove_persi
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[Qemu-devel] [PATCH v16 20/22] block/dirty-bitmap: add bdrv_remove_persistent_dirty_bitmap |
Date: |
Sat, 25 Feb 2017 20:07:56 +0300 |
Interface for removing persistent bitmap from its storage.
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Reviewed-by: John Snow <address@hidden>
---
block/dirty-bitmap.c | 18 ++++++++++++++++++
include/block/block_int.h | 3 +++
include/block/dirty-bitmap.h | 3 +++
3 files changed, 24 insertions(+)
diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index b684d8b00e..05e0aaef90 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -327,12 +327,30 @@ 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.
*/
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);
+ }
+}
+
void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
{
assert(!bdrv_dirty_bitmap_frozen(bitmap));
diff --git a/include/block/block_int.h b/include/block/block_int.h
index f943a7c24e..f7f7dd7717 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -324,6 +324,9 @@ struct BlockDriver {
const char *name,
uint32_t granularity,
Error **errp);
+ void (*bdrv_remove_persistent_dirty_bitmap)(BlockDriverState *bs,
+ const char *name,
+ Error **errp);
QLIST_ENTRY(BlockDriver) list;
};
diff --git a/include/block/dirty-bitmap.h b/include/block/dirty-bitmap.h
index b022b34964..ce126109e0 100644
--- a/include/block/dirty-bitmap.h
+++ b/include/block/dirty-bitmap.h
@@ -25,6 +25,9 @@ BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs,
void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap);
void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap);
void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs);
+void bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs,
+ const char *name,
+ Error **errp);
void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
--
2.11.1
- [Qemu-devel] [PATCH v16 00/22] qcow2: persistent dirty bitmaps, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 16/22] qmp: add persistent flag to block-dirty-bitmap-add, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 20/22] block/dirty-bitmap: add bdrv_remove_persistent_dirty_bitmap,
Vladimir Sementsov-Ogievskiy <=
- [Qemu-devel] [PATCH v16 06/22] block/dirty-bitmap: add deserialize_ones func, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 10/22] block/dirty-bitmap: add autoload field to BdrvDirtyBitmap, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 11/22] block: introduce persistent dirty bitmaps, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 17/22] qmp: add autoload parameter to block-dirty-bitmap-add, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 19/22] iotests: test qcow2 persistent dirty bitmap, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 02/22] specs/qcow2: do not use wording 'bitmap header', Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 14/22] block: add bdrv_can_store_new_dirty_bitmap, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 05/22] block: fix bdrv_dirty_bitmap_granularity signature, Vladimir Sementsov-Ogievskiy, 2017/02/25
- [Qemu-devel] [PATCH v16 18/22] qmp: add x-debug-block-dirty-bitmap-sha256, Vladimir Sementsov-Ogievskiy, 2017/02/25