block/copy-before-write.h: global state API + assertions
copy-before-write functions always run under BQL.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220303151616.325444-24-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/block/copy-before-write.c b/block/copy-before-write.c
index c30a5ff..80b7684 100644
--- a/block/copy-before-write.c
+++ b/block/copy-before-write.c
@@ -223,6 +223,7 @@
QDict *opts;
assert(source->total_sectors == target->total_sectors);
+ GLOBAL_STATE_CODE();
opts = qdict_new();
qdict_put_str(opts, "driver", "copy-before-write");
@@ -245,6 +246,7 @@
void bdrv_cbw_drop(BlockDriverState *bs)
{
+ GLOBAL_STATE_CODE();
bdrv_drop_filter(bs, &error_abort);
bdrv_unref(bs);
}
diff --git a/block/copy-before-write.h b/block/copy-before-write.h
index 51847e7..6e72bb2 100644
--- a/block/copy-before-write.h
+++ b/block/copy-before-write.h
@@ -29,6 +29,13 @@
#include "block/block_int.h"
#include "block/block-copy.h"
+/*
+ * Global state (GS) API. These functions run under the BQL.
+ *
+ * See include/block/block-global-state.h for more information about
+ * the GS API.
+ */
+
BlockDriverState *bdrv_cbw_append(BlockDriverState *source,
BlockDriverState *target,
const char *filter_node_name,
