From e866e23959b45325414ac84a21f31dea79867ee6 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 23 Apr 2010 13:28:21 +0200
Subject: spice/vnc: client migration.

Handle spice client migration, i.e. inform a spice client connected
about the new host and connection parameters, so it can move over the
connection automatically.

The monitor command has a not-yet used protocol argument simliar to
set_password and expire_password commands.  This allows to add a simliar
feature to vnc in the future.  Daniel Berrange plans to work on this.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 ui/qemu-spice.h |  4 ++++
 ui/spice-core.c | 25 +++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

(limited to 'ui')

diff --git a/ui/qemu-spice.h b/ui/qemu-spice.h
index 48239c3..05dc50a 100644
--- a/ui/qemu-spice.h
+++ b/ui/qemu-spice.h
@@ -35,6 +35,8 @@ int qemu_spice_add_interface(SpiceBaseInstance *sin);
 int qemu_spice_set_passwd(const char *passwd,
                           bool fail_if_connected, bool disconnect_if_connected);
 int qemu_spice_set_pw_expire(time_t expires);
+int qemu_spice_migrate_info(const char *hostname, int port, int tls_port,
+                            const char *subject);
 
 void do_info_spice_print(Monitor *mon, const QObject *data);
 void do_info_spice(Monitor *mon, QObject **ret_data);
@@ -44,6 +46,8 @@ void do_info_spice(Monitor *mon, QObject **ret_data);
 #define using_spice 0
 #define qemu_spice_set_passwd(_p, _f1, _f2) (-1)
 #define qemu_spice_set_pw_expire(_e) (-1)
+static inline int qemu_spice_migrate_info(const char *h, int p, int t, const char *s)
+{ return -1; }
 
 #endif /* CONFIG_SPICE */
 
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 27a1ced..1aa1a5e 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -30,11 +30,15 @@
 #include "qbool.h"
 #include "qstring.h"
 #include "qjson.h"
+#include "notify.h"
+#include "migration.h"
 #include "monitor.h"
+#include "hw/hw.h"
 
 /* core bits */
 
 static SpiceServer *spice_server;
+static Notifier migration_state;
 static const char *auth = "spice";
 static char *auth_passwd;
 static time_t auth_expires = TIME_MAX;
@@ -416,6 +420,24 @@ void do_info_spice(Monitor *mon, QObject **ret_data)
     *ret_data = QOBJECT(server);
 }
 
+static void migration_state_notifier(Notifier *notifier)
+{
+    int state = get_migration_state();
+
+    if (state == MIG_STATE_COMPLETED) {
+#if SPICE_SERVER_VERSION >= 0x000701 /* 0.7.1 */
+        spice_server_migrate_switch(spice_server);
+#endif
+    }
+}
+
+int qemu_spice_migrate_info(const char *hostname, int port, int tls_port,
+                            const char *subject)
+{
+    return spice_server_migrate_info(spice_server, hostname,
+                                     port, tls_port, subject);
+}
+
 static int add_channel(const char *name, const char *value, void *opaque)
 {
     int security = 0;
@@ -573,6 +595,9 @@ void qemu_spice_init(void)
     spice_server_init(spice_server, &core_interface);
     using_spice = 1;
 
+    migration_state.notify = migration_state_notifier;
+    add_migration_state_change_notifier(&migration_state);
+
     qemu_spice_input_init();
     qemu_spice_audio_init();
 
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