[Qemu-devel] [PATCH 02/14] block: complete all IOs before resizing a device

[Kevin Wolf]

From: Peter Lieven <address@hidden>

this patch ensures that all pending IOs are completed
before a device is resized. this is especially important
if a device is shrinked as it the bdrv_check_request()
result is invalidated.

Signed-off-by: Peter Lieven <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
 blockdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/blockdev.c b/blockdev.c
index 09f76b7..6f2b759 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1127,6 +1127,9 @@ void qmp_block_resize(const char *device, int64_t size, 
Error **errp)
         return;
     }
 
+    /* complete all in-flight operations before resizing the device */
+    bdrv_drain_all();
+
     switch (bdrv_truncate(bs, size)) {
     case 0:
         break;
-- 
1.8.1.4