migration/multifd: initialize packet->magic/version once at setup stage

MultiFDPacket_t's magic and version field never changes during
migration, so move these two fields in setup stage.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Message-Id: <20191011085050.17622-4-richardw.yang@linux.intel.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

diff --git a/migration/ram.c b/migration/ram.c
index 84c5953a84796a8653d0c8ec87b61f2fdaa9d481..963e795ed0a1da6c52f65342f53a88c51122789a 100644 (file)
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -793,8 +793,6 @@ static void multifd_send_fill_packet(MultiFDSendParams *p)
     MultiFDPacket_t *packet = p->packet;
     int i;
 
-    packet->magic = cpu_to_be32(MULTIFD_MAGIC);
-    packet->version = cpu_to_be32(MULTIFD_VERSION);
     packet->flags = cpu_to_be32(p->flags);
     packet->pages_alloc = cpu_to_be32(p->pages->allocated);
     packet->pages_used = cpu_to_be32(p->pages->used);
@@ -1240,6 +1238,8 @@ int multifd_save_setup(void)
         p->packet_len = sizeof(MultiFDPacket_t)
                       + sizeof(ram_addr_t) * page_count;
         p->packet = g_malloc0(p->packet_len);
+        p->packet->magic = cpu_to_be32(MULTIFD_MAGIC);
+        p->packet->version = cpu_to_be32(MULTIFD_VERSION);
         p->name = g_strdup_printf("multifdsend_%d", i);
         socket_send_channel_create(multifd_new_send_channel_async, p);
     }