From patchwork Mon Jul 23 14:23:00 2012
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Subject: [V4,
 3/3] migration: block migration when any of the block device is busy
From: Benoit Canet <benoit.canet@gmail.com>
X-Patchwork-Id: 172697
Message-Id: <1343053380-12133-4-git-send-email-benoit@irqsave.net>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, stefanha@gmail.com,
 =?UTF-8?q?Beno=C3=AEt=20Canet?= <benoit@irqsave.net>,
 stefanha@linux.vnet.ibm.com, pbonzini@redhat.com
Date: Mon, 23 Jul 2012 16:23:00 +0200

From: Benoît Canet <benoit@irqsave.net>

Signed-off-by: Benoit Canet <benoit@irqsave.net>

---
migration.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/migration.c b/migration.c
index 8db1b43..3d68996 100644
--- a/migration.c
+++ b/migration.c
@@ -425,6 +425,11 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
         return;
     }
 
+    if (bdrv_are_busy()) {
+        error_set(errp, QERR_BLOCK_DEV_IN_USE_MIGRATION_PREVENTED);
+        return;
+    }
+
     s = migrate_init(&params);
 
     if (strstart(uri, "tcp:", &p)) {