From 612ff3d8876a6df0484aa6ebb5cae4575f7514c5 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Tue, 22 Nov 2011 16:51:12 +0100
Subject: [PATCH] vpc: Add migration blocker

vpc caches the BAT. For migration to work, it would have to be
invalidated. Block migration for now.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 block/vpc.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/block/vpc.c b/block/vpc.c
index 39a324705d..75d7d4ac77 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -25,6 +25,7 @@
 #include "qemu-common.h"
 #include "block_int.h"
 #include "module.h"
+#include "migration.h"
 
 /**************************************************************/
 
@@ -128,6 +129,8 @@ typedef struct BDRVVPCState {
 
     uint64_t last_bitmap;
 #endif
+
+    Error *migration_blocker;
 } BDRVVPCState;
 
 static uint32_t vpc_checksum(uint8_t* buf, size_t size)
@@ -228,6 +231,13 @@ static int vpc_open(BlockDriverState *bs, int flags)
 #endif
 
     qemu_co_mutex_init(&s->lock);
+
+    /* Disable migration when VHD images are used */
+    error_set(&s->migration_blocker,
+              QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
+              "vpc", bs->device_name, "live migration");
+    migrate_add_blocker(s->migration_blocker);
+
     return 0;
  fail:
     return err;
@@ -651,6 +661,9 @@ static void vpc_close(BlockDriverState *bs)
 #ifdef CACHE
     g_free(s->pageentry_u8);
 #endif
+
+    migrate_del_blocker(s->migration_blocker);
+    error_free(s->migration_blocker);
 }
 
 static QEMUOptionParameter vpc_create_options[] = {
-- 
2.11.0