[PATCH 3/5] multifd: Introduce multifd-internal.h

[Lukas Straub <lukasstraub2@web.de>]

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Introduce multifd-internal.h so code that would normally go into
multifd.c can go into an extra file. This way, multifd.c hopefully
won't grow to 4000 lines like ram.c

This will be used in the next commits to add colo support to multifd.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
---
 migration/multifd-internal.h | 34 ++++++++++++++++++++++++++++++++++
 migration/multifd.c          | 15 ++++-----------
 2 files changed, 38 insertions(+), 11 deletions(-)
 create mode 100644 migration/multifd-internal.h

diff --git a/migration/multifd-internal.h b/migration/multifd-internal.h
new file mode 100644
index 0000000000..6eeaa028e7
--- /dev/null
+++ b/migration/multifd-internal.h
@@ -0,0 +1,34 @@
+/*
+ * Internal Multifd header
+ *
+ * Copyright (c) 2019-2020 Red Hat Inc
+ *
+ * Authors:
+ *  Juan Quintela <quintela@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifdef QEMU_MIGRATION_MULTIFD_INTERNAL_H
+#error Only include this header directly
+#endif
+#define QEMU_MIGRATION_MULTIFD_INTERNAL_H
+
+#ifndef MULTIFD_INTERNAL
+#error This header is internal to multifd
+#endif
+
+struct MultiFDRecvState {
+    MultiFDRecvParams *params;
+    /* number of created threads */
+    int count;
+    /* syncs main thread and channels */
+    QemuSemaphore sem_sync;
+    /* global number of generated multifd packets */
+    uint64_t packet_num;
+    /* multifd ops */
+    MultiFDMethods *ops;
+};
+
+extern struct MultiFDRecvState *multifd_recv_state;
diff --git a/migration/multifd.c b/migration/multifd.c
index 4e71c19292..f6bad69b6c 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -31,6 +31,9 @@
 #include "io/channel-socket.h"
 #include "yank_functions.h"
 
+#define MULTIFD_INTERNAL
+#include "multifd-internal.h"
+
 /* Multiple fd's */
 
 #define MULTIFD_MAGIC 0x11223344U
@@ -967,17 +970,7 @@ int multifd_save_setup(Error **errp)
     return 0;
 }
 
-struct {
-    MultiFDRecvParams *params;
-    /* number of created threads */
-    int count;
-    /* syncs main thread and channels */
-    QemuSemaphore sem_sync;
-    /* global number of generated multifd packets */
-    uint64_t packet_num;
-    /* multifd ops */
-    MultiFDMethods *ops;
-} *multifd_recv_state;
+struct MultiFDRecvState *multifd_recv_state;
 
 static void multifd_recv_terminate_threads(Error *err)
 {
-- 
2.39.2


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