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[Qemu-block] [PATCH 22/24] qcow2: add .bdrv_remove_persistent_dirty_bitm
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[Qemu-block] [PATCH 22/24] qcow2: add .bdrv_remove_persistent_dirty_bitmap |
Date: |
Wed, 26 Apr 2017 14:30:36 +0300 |
Realize .bdrv_remove_persistent_dirty_bitmap interface.
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
Reviewed-by: John Snow <address@hidden>
---
block/qcow2-bitmap.c | 41 +++++++++++++++++++++++++++++++++++++++++
block/qcow2.c | 1 +
block/qcow2.h | 3 +++
3 files changed, 45 insertions(+)
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index c911a08d1b..b9b5ab56a8 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -1163,6 +1163,47 @@ static Qcow2Bitmap *find_bitmap_by_name(Qcow2BitmapList
*bm_list,
return NULL;
}
+void qcow2_remove_persistent_dirty_bitmap(BlockDriverState *bs,
+ const char *name,
+ Error **errp)
+{
+ int ret;
+ BDRVQcow2State *s = bs->opaque;
+ Qcow2Bitmap *bm;
+ Qcow2BitmapList *bm_list;
+
+ if (s->nb_bitmaps == 0) {
+ /* Absence of the bitmap is not an error: see explanation above
+ * bdrv_remove_persistent_dirty_bitmap() definition. */
+ return;
+ }
+
+ bm_list = bitmap_list_load(bs, s->bitmap_directory_offset,
+ s->bitmap_directory_size, errp);
+ if (bm_list == NULL) {
+ return;
+ }
+
+ bm = find_bitmap_by_name(bm_list, name);
+ if (bm == NULL) {
+ goto fail;
+ }
+
+ QSIMPLEQ_REMOVE(bm_list, bm, Qcow2Bitmap, entry);
+
+ ret = update_ext_header_and_dir(bs, bm_list);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "Failed to update bitmap extension");
+ goto fail;
+ }
+
+ free_bitmap_clusters(bs, &bm->table);
+
+fail:
+ bitmap_free(bm);
+ bitmap_list_free(bm_list);
+}
+
void qcow2_store_persistent_dirty_bitmaps(BlockDriverState *bs, Error **errp)
{
BdrvDirtyBitmap *bitmap;
diff --git a/block/qcow2.c b/block/qcow2.c
index fde4769e68..43bac94f08 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -3563,6 +3563,7 @@ BlockDriver bdrv_qcow2 = {
.bdrv_attach_aio_context = qcow2_attach_aio_context,
.bdrv_can_store_new_dirty_bitmap = qcow2_can_store_new_dirty_bitmap,
+ .bdrv_remove_persistent_dirty_bitmap =
qcow2_remove_persistent_dirty_bitmap,
};
static void bdrv_qcow2_init(void)
diff --git a/block/qcow2.h b/block/qcow2.h
index fd311f383d..93536d7a3f 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -626,5 +626,8 @@ bool qcow2_can_store_new_dirty_bitmap(BlockDriverState *bs,
const char *name,
uint32_t granularity,
Error **errp);
+void qcow2_remove_persistent_dirty_bitmap(BlockDriverState *bs,
+ const char *name,
+ Error **errp);
#endif
--
2.11.1
- [Qemu-block] [PATCH v17 00/24] qcow2: persistent dirty bitmaps, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 02/24] specs/qcow2: do not use wording 'bitmap header', Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 22/24] qcow2: add .bdrv_remove_persistent_dirty_bitmap,
Vladimir Sementsov-Ogievskiy <=
- [Qemu-block] [PATCH 20/24] iotests: test qcow2 persistent dirty bitmap, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 18/24] qmp: add autoload parameter to block-dirty-bitmap-add, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 04/24] tests: add hbitmap iter test, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 23/24] qmp: block-dirty-bitmap-remove: remove persistent, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 11/24] block: bdrv_close: release bitmaps after drv->bdrv_close, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 24/24] block: release persistent bitmaps on inactivate, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 12/24] block: introduce persistent dirty bitmaps, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 03/24] hbitmap: improve dirty iter, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 05/24] block: fix bdrv_dirty_bitmap_granularity signature, Vladimir Sementsov-Ogievskiy, 2017/04/26
- [Qemu-block] [PATCH 01/24] specs/qcow2: fix bitmap granularity qemu-specific note, Vladimir Sementsov-Ogievskiy, 2017/04/26