commit 62df066ffffdbd41b42ca91130611e40fbc53f0b
author Peter Xu <peterx@redhat.com> Wed May 02 18:47:38 2018 +0800
committer Juan Quintela <quintela@redhat.com> Tue May 15 22:12:41 2018 +0200
tree b834f0b0dc36054f7a883be9a3a8e10ea66dec32
parent 3b563c4be01f42d2a4e641d50736bd5ac8e3b15f

migration: introduce lock for to_dst_file

Let's introduce a lock for that QEMUFile since we are going to operate
on it in multiple threads.

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180502104740.12123-23-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

migration/channel.c

diff --git a/migration/channel.c b/migration/channel.c
index c5eaf0f..716192b 100644
--- a/migration/channel.c
+++ b/migration/channel.c
@@ -74,8 +74,9 @@
         } else {
             QEMUFile *f = qemu_fopen_channel_output(ioc);
 
+            qemu_mutex_lock(&s->qemu_file_lock);
             s->to_dst_file = f;
-
+            qemu_mutex_unlock(&s->qemu_file_lock);
         }
     }
     migrate_fd_connect(s, error);