From: Vladimir Sementsov-Ogievskiy <address@hidden>
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>
Message-id: address@hidden
Signed-off-by: Max Reitz <address@hidden>
+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);
+}