diff options
Diffstat (limited to 'block/block-copy.c')
| -rw-r--r-- | block/block-copy.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/block/block-copy.c b/block/block-copy.c index 1c60368d72..9ee3dd7ef5 100644 --- a/block/block-copy.c +++ b/block/block-copy.c @@ -313,7 +313,12 @@ static int64_t block_copy_calculate_cluster_size(BlockDriverState *target, { int ret; BlockDriverInfo bdi; - bool target_does_cow = bdrv_backing_chain_next(target); + bool target_does_cow; + + GLOBAL_STATE_CODE(); + GRAPH_RDLOCK_GUARD_MAINLOOP(); + + target_does_cow = bdrv_backing_chain_next(target); /* * If there is no backing file on the target, we cannot rely on COW if our @@ -355,6 +360,8 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target, BdrvDirtyBitmap *copy_bitmap; bool is_fleecing; + GLOBAL_STATE_CODE(); + cluster_size = block_copy_calculate_cluster_size(target->bs, errp); if (cluster_size < 0) { return NULL; @@ -392,7 +399,9 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target, * For more information see commit f8d59dfb40bb and test * tests/qemu-iotests/222 */ + bdrv_graph_rdlock_main_loop(); is_fleecing = bdrv_chain_contains(target->bs, source->bs); + bdrv_graph_rdunlock_main_loop(); s = g_new(BlockCopyState, 1); *s = (BlockCopyState) { |