File 0090-migration-fix-inability-to-save-VM-.patch of Package qemu.3505

From 1ffa3dbe9ea375c525dca4d72c1c3852ba2c0f7a Mon Sep 17 00:00:00 2001
From: "Denis V. Lunev" <den@openvz.org>
Date: Wed, 15 Jun 2016 18:06:43 +0300
Subject: [PATCH] migration: fix inability to save VM after snapshot

The following sequence of operations fails:
    virsh start vm
    virsh snapshot-create vm
    virshh save vm --file file
with the following error
    error: Failed to save domain vm to file
    error: internal error: unable to execute QEMU command 'migrate':
    There's a migration process in progress

The problem is that qemu_savevm_state() calls migrate_init() which sets
migration state to MIGRATION_STATUS_SETUP and never cleaned it up.
This patch do the job.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
CC: Juan Quintela <quintela@redhat.com>
CC: Amit Shah <amit.shah@redhat.com>
Message-Id: <1466003203-26263-1-git-send-email-den@openvz.org>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
(cherry picked from commit 6dcf66681aea2a371ddd63770bf80615652f5c94)
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 migration/savevm.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/migration/savevm.c b/migration/savevm.c
index 8346649..a2f9df5 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1167,10 +1167,12 @@ static int qemu_savevm_state(QEMUFile *f, Error **errp)
         .shared = 0
     };
     MigrationState *ms = migrate_init(&params);
+    MigrationStatus status;
     ms->to_dst_file = f;
 
     if (migration_is_blocked(errp)) {
-        return -EINVAL;
+        ret = -EINVAL;
+        goto done;
     }
 
     qemu_mutex_unlock_iothread();
@@ -1193,6 +1195,14 @@ static int qemu_savevm_state(QEMUFile *f, Error **errp)
     if (ret != 0) {
         error_setg_errno(errp, -ret, "Error while writing VM state");
     }
+
+done:
+    if (ret != 0) {
+        status = MIGRATION_STATUS_FAILED;
+    } else {
+        status = MIGRATION_STATUS_COMPLETED;
+    }
+    migrate_set_state(&ms->state, MIGRATION_STATUS_SETUP, status);
     return ret;
 }