Version 1.0.1

[qemu.git] / migration.c

diff --git a/migration.c b/migration.c
index 3b4abbde64e2802ce0440006757fa6c1c69f6842..8280d7189aa4265d6b7204863d8d9d5c24d8820d 100644 (file)
--- a/migration.c
+++ b/migration.c
@@ -89,6 +89,9 @@ void process_incoming_migration(QEMUFile *f)
     qemu_announce_self();
     DPRINTF("successfully loaded vm state\n");
 
+    /* Make sure all file formats flush their mutable metadata */
+    bdrv_invalidate_cache_all();
+
     if (autostart) {
         vm_start();
     } else {
@@ -155,7 +158,6 @@ MigrationInfo *qmp_query_migrate(Error **errp)
 
 static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
 {
-    s->mon = mon;
     if (monitor_suspend(mon) == 0) {
         DPRINTF("suspending monitor\n");
     } else {
@@ -216,7 +218,7 @@ static void migrate_fd_put_notify(void *opaque)
 
     qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
     qemu_file_put_notify(s->file);
-    if (qemu_file_get_error(s->file)) {
+    if (s->file && qemu_file_get_error(s->file)) {
         migrate_fd_error(s);
     }
 }
@@ -383,7 +385,12 @@ static MigrationState *migrate_init(Monitor *mon, int detach, int blk, int inc)
     s->bandwidth_limit = bandwidth_limit;
     s->blk = blk;
     s->shared = inc;
-    s->mon = NULL;
+
+    /* s->mon is used for two things:
+       - pass fd in fd migration
+       - suspend/resume monitor for not detached migration
+    */
+    s->mon = mon;
     s->bandwidth_limit = bandwidth_limit;
     s->state = MIG_STATE_SETUP;
 
@@ -394,6 +401,18 @@ static MigrationState *migrate_init(Monitor *mon, int detach, int blk, int inc)
     return s;
 }
 
+static GSList *migration_blockers;
+
+void migrate_add_blocker(Error *reason)
+{
+    migration_blockers = g_slist_prepend(migration_blockers, reason);
+}
+
+void migrate_del_blocker(Error *reason)
+{
+    migration_blockers = g_slist_remove(migration_blockers, reason);
+}
+
 int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     MigrationState *s = migrate_get_current();
@@ -413,6 +432,12 @@ int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
         return -1;
     }
 
+    if (migration_blockers) {
+        Error *err = migration_blockers->data;
+        qerror_report_err(err);
+        return -1;
+    }
+
     s = migrate_init(mon, detach, blk, inc);
 
     if (strstart(uri, "tcp:", &p)) {
@@ -435,6 +460,10 @@ int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
         return ret;
     }
 
+    if (detach) {
+        s->mon = NULL;
+    }
+
     notifier_list_notify(&migration_state_notifiers, s);
     return 0;
 }