Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

[mirror_qemu.git] / block.c

diff --git a/block.c b/block.c
index 2a2d0696672207cbc97ee930c509658a49b54e4a..59441248451e40b15cb3584cfe835dde80a0eb33 100644 (file)
--- a/block.c
+++ b/block.c
@@ -4165,7 +4165,6 @@ void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to,
 {
     BdrvChild *c, *next;
     GSList *list = NULL, *p;
-    uint64_t old_perm, old_shared;
     uint64_t perm = 0, shared = BLK_PERM_ALL;
     int ret;
 
@@ -4211,8 +4210,8 @@ void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to,
         bdrv_unref(from);
     }
 
-    bdrv_get_cumulative_perm(to, &old_perm, &old_shared);
-    bdrv_set_perm(to, old_perm | perm, old_shared | shared);
+    bdrv_get_cumulative_perm(to, &perm, &shared);
+    bdrv_set_perm(to, perm, shared);
 
 out:
     g_slist_free(list);
@@ -5078,6 +5077,27 @@ int bdrv_has_zero_init(BlockDriverState *bs)
     return 0;
 }
 
+int bdrv_has_zero_init_truncate(BlockDriverState *bs)
+{
+    if (!bs->drv) {
+        return 0;
+    }
+
+    if (bs->backing) {
+        /* Depends on the backing image length, but better safe than sorry */
+        return 0;
+    }
+    if (bs->drv->bdrv_has_zero_init_truncate) {
+        return bs->drv->bdrv_has_zero_init_truncate(bs);
+    }
+    if (bs->file && bs->drv->is_filter) {
+        return bdrv_has_zero_init_truncate(bs->file->bs);
+    }
+
+    /* safe default */
+    return 0;
+}
+
 bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs)
 {
     BlockDriverInfo bdi;
@@ -5346,7 +5366,7 @@ static void coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs,
     for (bm = bdrv_dirty_bitmap_next(bs, NULL); bm;
          bm = bdrv_dirty_bitmap_next(bs, bm))
     {
-        bdrv_dirty_bitmap_set_migration(bm, false);
+        bdrv_dirty_bitmap_skip_store(bm, false);
     }
 
     ret = refresh_total_sectors(bs, bs->total_sectors);