migration: Create include for migration snapshots

Start removing migration code from sysemu/sysemu.h.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

hmp.c

@@ -42,6 +42,7 @@
 #include "qemu/error-report.h"
 #include "exec/ramlist.h"
 #include "hw/intc/intc.h"
+#include "migration/snapshot.h"
 
 #ifdef CONFIG_SPICE
 #include <spice/enums.h>
@@ -1284,7 +1285,7 @@ void hmp_loadvm(Monitor *mon, const QDict *qdict)
 
     vm_stop(RUN_STATE_RESTORE_VM);
 
-    if (load_vmstate(name, &err) == 0 && saved_vm_running) {
+    if (load_snapshot(name, &err) == 0 && saved_vm_running) {
         vm_start();
     }
     hmp_handle_error(mon, &err);
@@ -1294,7 +1295,7 @@ void hmp_savevm(Monitor *mon, const QDict *qdict)
 {
     Error *err = NULL;
 
-    save_vmstate(qdict_get_try_str(qdict, "name"), &err);
+    save_snapshot(qdict_get_try_str(qdict, "name"), &err);
     hmp_handle_error(mon, &err);
 }
 

include/block/block_int.h

@@ -601,8 +601,8 @@ struct BlockDriverState {
     int copy_on_read;
 
     /* If we are reading a disk image, give its size in sectors.
-     * Generally read-only; it is written to by load_vmstate and save_vmstate,
-     * but the block layer is quiescent during those.
+     * Generally read-only; it is written to by load_snapshot and
+     * save_snaphost, but the block layer is quiescent during those.
      */
     int64_t total_sectors;
 

include/migration/snapshot.h

@@ -0,0 +1,21 @@
+/*
+ * QEMU snapshots
+ *
+ * Copyright (c) 2004-2008 Fabrice Bellard
+ * Copyright (c) 2009-2015 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.
+ */
+
+#ifndef QEMU_MIGRATION_SNAPSHOT_H
+#define QEMU_MIGRATION_SNAPSHOT_H
+
+int save_snapshot(const char *name, Error **errp);
+int load_snapshot(const char *name, Error **errp);
+
+#endif

include/sysemu/sysemu.h

@@ -92,9 +92,6 @@ void qemu_remove_exit_notifier(Notifier *notify);
 void qemu_add_machine_init_done_notifier(Notifier *notify);
 void qemu_remove_machine_init_done_notifier(Notifier *notify);
 
-int save_vmstate(const char *name, Error **errp);
-int load_vmstate(const char *name, Error **errp);
-
 void qemu_announce_self(void);
 
 extern int autostart;

migration/savevm.c

@@ -35,6 +35,7 @@
 #include "sysemu/sysemu.h"
 #include "qemu/timer.h"
 #include "migration/migration.h"
+#include "migration/snapshot.h"
 #include "qemu-file-channel.h"
 #include "qemu-file.h"
 #include "savevm.h"
@@ -2067,7 +2068,7 @@ int qemu_loadvm_state(QEMUFile *f)
     return ret;
 }
 
-int save_vmstate(const char *name, Error **errp)
+int save_snapshot(const char *name, Error **errp)
 {
     BlockDriverState *bs, *bs1;
     QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
@@ -2224,7 +2225,7 @@ void qmp_xen_load_devices_state(const char *filename, Error **errp)
     migration_incoming_state_destroy();
 }
 
-int load_vmstate(const char *name, Error **errp)
+int load_snapshot(const char *name, Error **errp)
 {
     BlockDriverState *bs, *bs_vm_state;
     QEMUSnapshotInfo sn;

replay/replay-snapshot.c

@@ -19,6 +19,7 @@
 #include "qapi/qmp/qstring.h"
 #include "qemu/error-report.h"
 #include "migration/vmstate.h"
+#include "migration/snapshot.h"
 
 static void replay_pre_save(void *opaque)
 {
@@ -66,13 +67,13 @@ void replay_vmstate_init(void)
 
     if (replay_snapshot) {
         if (replay_mode == REPLAY_MODE_RECORD) {
-            if (save_vmstate(replay_snapshot, &err) != 0) {
+            if (save_snapshot(replay_snapshot, &err) != 0) {
                 error_report_err(err);
                 error_report("Could not create snapshot for icount record");
                 exit(1);
             }
         } else if (replay_mode == REPLAY_MODE_PLAY) {
-            if (load_vmstate(replay_snapshot, &err) != 0) {
+            if (load_snapshot(replay_snapshot, &err) != 0) {
                 error_report_err(err);
                 error_report("Could not load snapshot for icount replay");
                 exit(1);

vl.c

@@ -87,6 +87,7 @@ int main(int argc, char **argv)
 #include "sysemu/blockdev.h"
 #include "hw/block/block.h"
 #include "migration/block.h"
+#include "migration/snapshot.h"
 #include "sysemu/tpm.h"
 #include "sysemu/dma.h"
 #include "hw/audio/soundhw.h"
@@ -4722,7 +4723,7 @@ int main(int argc, char **argv, char **envp)
         replay_vmstate_init();
     } else if (loadvm) {
         Error *local_err = NULL;
-        if (load_vmstate(loadvm, &local_err) < 0) {
+        if (load_snapshot(loadvm, &local_err) < 0) {
             error_report_err(local_err);
             autostart = 0;
         }