[Qemu-devel] [PATCH v3 10/14] block: Add bdrv_next_monitor_owned()

[Max Reitz]

Add a function for iterating over all monitor-owned BlockDriverStates so
the generic block layer can do so.

Signed-off-by: Max Reitz <address@hidden>
---
 blockdev.c                      | 7 +++++++
 include/block/block.h           | 1 +
 stubs/Makefile.objs             | 1 +
 stubs/bdrv-next-monitor-owned.c | 6 ++++++
 4 files changed, 15 insertions(+)
 create mode 100644 stubs/bdrv-next-monitor-owned.c

diff --git a/blockdev.c b/blockdev.c
index 6b929a9..6370490 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -722,6 +722,13 @@ void blockdev_close_all_bdrv_states(void)
     }
 }
 
+/* Iterates over the list of monitor-owned BlockDriverStates */
+BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
+{
+    return bs ? QTAILQ_NEXT(bs, monitor_list)
+              : QTAILQ_FIRST(&monitor_bdrv_states);
+}
+
 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
                             Error **errp)
 {
diff --git a/include/block/block.h b/include/block/block.h
index db9e0f5..bd27e6c 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -413,6 +413,7 @@ BlockDriverState *bdrv_lookup_bs(const char *device,
 bool bdrv_chain_contains(BlockDriverState *top, BlockDriverState *base);
 BlockDriverState *bdrv_next_node(BlockDriverState *bs);
 BlockDriverState *bdrv_next(BlockDriverState *bs);
+BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs);
 int bdrv_is_encrypted(BlockDriverState *bs);
 int bdrv_key_required(BlockDriverState *bs);
 int bdrv_set_key(BlockDriverState *bs, const char *key);
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index 9d9f1d0..b6d1e65 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -1,4 +1,5 @@
 stub-obj-y += arch-query-cpu-def.o
+stub-obj-y += bdrv-next-monitor-owned.o
 stub-obj-y += blk-commit-all.o
 stub-obj-y += blockdev-close-all-bdrv-states.o
 stub-obj-y += clock-warp.o
diff --git a/stubs/bdrv-next-monitor-owned.c b/stubs/bdrv-next-monitor-owned.c
new file mode 100644
index 0000000..09028db
--- /dev/null
+++ b/stubs/bdrv-next-monitor-owned.c
@@ -0,0 +1,6 @@
+#include "block/block.h"
+
+BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
+{
+    return NULL;
+}
-- 
2.7.1