From c82954e529929c2d650589d8bccaaf19dec33431 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beno=C3=AEt=20Canet?= <benoit.canet@gmail.com>
Date: Fri, 23 Mar 2012 08:36:51 +0100
Subject: [PATCH] qed: add bdrv_invalidate_cache to be called after incoming
 live migration

The QED image is reopened to flush metadata and check consistency.

Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Reviewed-by: Stefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/qed.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/block/qed.c b/block/qed.c
index 19d87f3bef..a5e9d57082 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1510,6 +1510,15 @@ static int bdrv_qed_change_backing_file(BlockDriverState *bs,
     return ret;
 }
 
+static void bdrv_qed_invalidate_cache(BlockDriverState *bs)
+{
+    BDRVQEDState *s = bs->opaque;
+
+    bdrv_qed_close(bs);
+    memset(s, 0, sizeof(BDRVQEDState));
+    bdrv_qed_open(bs, bs->open_flags);
+}
+
 static int bdrv_qed_check(BlockDriverState *bs, BdrvCheckResult *result)
 {
     BDRVQEDState *s = bs->opaque;
@@ -1561,6 +1570,7 @@ static BlockDriver bdrv_qed = {
     .bdrv_getlength           = bdrv_qed_getlength,
     .bdrv_get_info            = bdrv_qed_get_info,
     .bdrv_change_backing_file = bdrv_qed_change_backing_file,
+    .bdrv_invalidate_cache    = bdrv_qed_invalidate_cache,
     .bdrv_check               = bdrv_qed_check,
 };