[Qemu-devel] [PATCH v3 0/5] add support for spice migration v3

[Qemu-devel] [PATCH v3 0/5] add support for spice migration v3

[Yonit Halperin]

v3:
patch 2: hold a global variable for the state of spice display, instead of one per
         device.

v2:
Notify spice about vm state changes only via spice_server_vm_start/stop
spice repo:  http://cgit.freedesktop.org/~yhalperi/spice/log/?h=seamless-migration.v2
-----------
Hi,

The following series introduces support for keeping the spice session active after migration.
For more details about spice seamless migration, see
http://lists.freedesktop.org/archives/spice-devel/2012-August/010412.html

Spice branches with seamless migration support can be found at:
spice-protocol: http://cgit.freedesktop.org/~yhalperi/spice-protocol/log/?h=seamless-migration.v1
spice-common: http://cgit.freedesktop.org/~yhalperi/spice-common/log/
spice: http://cgit.freedesktop.org/~yhalperi/spice/log/?h=seamless-migration.v1
spicei-gtk: http://cgit.freedesktop.org/~yhalperi/spice-gtk/log/

Regards,
Yonit.

Yonit Halperin (5):
  spice: notify spice server on vm start/stop
  spice: notify on vm state change only via spice_server_vm_start/stop
  spice migration: add QEVENT_SPICE_MIGRATE_COMPLETED
  spice: add 'migrated' flag to spice info
  spice: adding seamless-migration option to the command line

 hmp.c              |    2 ++
 hw/qxl.c           |    7 ++++---
 monitor.c          |    1 +
 monitor.h          |    1 +
 qapi-schema.json   |    5 ++++-
 qemu-config.c      |    3 +++
 qemu-options.hx    |    3 +++
 ui/spice-core.c    |   38 +++++++++++++++++++++++++++++++++++++-
 ui/spice-display.c |   32 ++++++++++++++++++++++++++++++--
 ui/spice-display.h |    9 +++++++--
 10 files changed, 92 insertions(+), 9 deletions(-)

-- 
1.7.7.6

[Qemu-devel] [PATCH v3 1/5] spice: notify spice server on vm start/stop

[Yonit Halperin]

Spice server needs to know about the vm state in order to prevent
attempts to write to devices when they are stopped, mainly during
the non-live stage of migration.
Instead, spice will take care of restoring this writes, on the migration
target side, after migration completes.

Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
---
 ui/spice-core.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/ui/spice-core.c b/ui/spice-core.c
index 4fc48f8..32de1f1 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -545,6 +545,18 @@ static int add_channel(const char *name, const char *value, void *opaque)
     return 0;
 }
 
+static void vm_change_state_handler(void *opaque, int running,
+                                    RunState state)
+{
+#if SPICE_SERVER_VERSION >= 0x000b02 /* 0.11.2 */
+    if (running) {
+        spice_server_vm_start(spice_server);
+    } else {
+        spice_server_vm_stop(spice_server);
+    }
+#endif
+}
+
 void qemu_spice_init(void)
 {
     QemuOpts *opts = QTAILQ_FIRST(&qemu_spice_opts.head);
@@ -718,6 +730,8 @@ void qemu_spice_init(void)
     qemu_spice_input_init();
     qemu_spice_audio_init();
 
+    qemu_add_vm_change_state_handler(vm_change_state_handler, &spice_server);
+
     g_free(x509_key_file);
     g_free(x509_cert_file);
     g_free(x509_cacert_file);
-- 
1.7.7.6

[Qemu-devel] [PATCH v3 2/5] spice: notify on vm state change only via spice_server_vm_start/stop

[Yonit Halperin]

QXLWorker->start/stop are deprecated since spice-server 0.11.2

Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
---
 hw/qxl.c           |    7 ++++---
 ui/spice-core.c    |    4 ++++
 ui/spice-display.c |   32 ++++++++++++++++++++++++++++++--
 ui/spice-display.h |    9 +++++++--
 4 files changed, 45 insertions(+), 7 deletions(-)

diff --git a/hw/qxl.c b/hw/qxl.c
index c2dd3b4..95bbc03 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -958,9 +958,10 @@ static void qxl_update_irq(PCIQXLDevice *d)
 static void qxl_check_state(PCIQXLDevice *d)
 {
     QXLRam *ram = d->ram;
+    int spice_display_running = qemu_spice_display_is_running(&d->ssd);
 
-    assert(!d->ssd.running || SPICE_RING_IS_EMPTY(&ram->cmd_ring));
-    assert(!d->ssd.running || SPICE_RING_IS_EMPTY(&ram->cursor_ring));
+    assert(!spice_display_running || SPICE_RING_IS_EMPTY(&ram->cmd_ring));
+    assert(!spice_display_running || SPICE_RING_IS_EMPTY(&ram->cursor_ring));
 }
 
 static void qxl_reset_state(PCIQXLDevice *d)
@@ -1538,7 +1539,7 @@ static void qxl_send_events(PCIQXLDevice *d, uint32_t events)
     uint32_t old_pending;
     uint32_t le_events = cpu_to_le32(events);
 
-    assert(d->ssd.running);
+    assert(qemu_spice_display_is_running(&d->ssd));
     old_pending = __sync_fetch_and_or(&d->ram->int_pending, le_events);
     if ((old_pending & le_events) == le_events) {
         return;
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 32de1f1..fa78cc3 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -37,6 +37,7 @@
 #include "migration.h"
 #include "monitor.h"
 #include "hw/hw.h"
+#include "spice-display.h"
 
 /* core bits */
 
@@ -550,9 +551,11 @@ static void vm_change_state_handler(void *opaque, int running,
 {
 #if SPICE_SERVER_VERSION >= 0x000b02 /* 0.11.2 */
     if (running) {
+        qemu_spice_display_start();
         spice_server_vm_start(spice_server);
     } else {
         spice_server_vm_stop(spice_server);
+        qemu_spice_display_stop();
     }
 #endif
 }
@@ -754,6 +757,7 @@ int qemu_spice_add_interface(SpiceBaseInstance *sin)
         spice_server = spice_server_new();
         spice_server_init(spice_server, &core_interface);
     }
+
     return spice_server_add_interface(spice_server, sin);
 }
 
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 3e8f0b3..1c31418 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -126,18 +126,44 @@ void qemu_spice_wakeup(SimpleSpiceDisplay *ssd)
     ssd->worker->wakeup(ssd->worker);
 }
 
-void qemu_spice_start(SimpleSpiceDisplay *ssd)
+#if SPICE_SERVER_VERSION < 0x000b02 /* before 0.11.2 */
+static void qemu_spice_start(SimpleSpiceDisplay *ssd)
 {
     trace_qemu_spice_start(ssd->qxl.id);
     ssd->worker->start(ssd->worker);
 }
 
-void qemu_spice_stop(SimpleSpiceDisplay *ssd)
+static void qemu_spice_stop(SimpleSpiceDisplay *ssd)
 {
     trace_qemu_spice_stop(ssd->qxl.id);
     ssd->worker->stop(ssd->worker);
 }
 
+#else
+
+static int spice_display_is_running;
+
+void qemu_spice_display_start(void)
+{
+    spice_display_is_running = true;
+}
+
+void qemu_spice_display_stop(void)
+{
+    spice_display_is_running = false;
+}
+
+#endif
+
+int qemu_spice_display_is_running(SimpleSpiceDisplay *ssd)
+{
+#if SPICE_SERVER_VERSION < 0x000b02 /* before 0.11.2 */
+    return ssd->running;
+#else
+    return spice_display_is_running;
+#endif
+}
+
 static SimpleSpiceUpdate *qemu_spice_create_update(SimpleSpiceDisplay *ssd)
 {
     SimpleSpiceUpdate *update;
@@ -272,6 +298,7 @@ void qemu_spice_destroy_host_primary(SimpleSpiceDisplay *ssd)
 void qemu_spice_vm_change_state_handler(void *opaque, int running,
                                         RunState state)
 {
+#if SPICE_SERVER_VERSION < 0x000b02 /* before 0.11.2 */
     SimpleSpiceDisplay *ssd = opaque;
 
     if (running) {
@@ -281,6 +308,7 @@ void qemu_spice_vm_change_state_handler(void *opaque, int running,
         qemu_spice_stop(ssd);
         ssd->running = false;
     }
+#endif
 }
 
 void qemu_spice_display_init_common(SimpleSpiceDisplay *ssd, DisplayState *ds)
diff --git a/ui/spice-display.h b/ui/spice-display.h
index 12e50b6..672d65e 100644
--- a/ui/spice-display.h
+++ b/ui/spice-display.h
@@ -82,7 +82,9 @@ struct SimpleSpiceDisplay {
 
     QXLRect dirty;
     int notify;
+#if SPICE_SERVER_VERSION < 0x000b02 /* before 0.11.2 */
     int running;
+#endif
 
     /*
      * All struct members below this comment can be accessed from
@@ -129,5 +131,8 @@ void qemu_spice_create_primary_surface(SimpleSpiceDisplay *ssd, uint32_t id,
 void qemu_spice_destroy_primary_surface(SimpleSpiceDisplay *ssd,
                                         uint32_t id, qxl_async_io async);
 void qemu_spice_wakeup(SimpleSpiceDisplay *ssd);
-void qemu_spice_start(SimpleSpiceDisplay *ssd);
-void qemu_spice_stop(SimpleSpiceDisplay *ssd);
+#if SPICE_SERVER_VERSION >= 0x000b02 /* before 0.11.2 */
+void qemu_spice_display_start(void);
+void qemu_spice_display_stop(void);
+#endif
+int qemu_spice_display_is_running(SimpleSpiceDisplay *ssd);
-- 
1.7.7.6

[Qemu-devel] [PATCH v3 3/5] spice migration: add QEVENT_SPICE_MIGRATE_COMPLETED

[Yonit Halperin]

When migrating, libvirt queries the migration status, and upon migration
completions, it closes the migration src. On the other hand, when
migration is completed, spice transfers data from the src to destination
via the client. This data is required for keeping the spice session
after migration, without suffering from data loss and inconsistencies.
In order to allow this data transfer, we add QEVENT for signaling
libvirt that spice migration has completed, and libvirt needs to wait
for this event before quitting the src process.

Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
---
 monitor.c       |    1 +
 monitor.h       |    1 +
 ui/spice-core.c |    9 ++++++++-
 3 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/monitor.c b/monitor.c
index ce42466..584efe0 100644
--- a/monitor.c
+++ b/monitor.c
@@ -455,6 +455,7 @@ static const char *monitor_event_names[] = {
     [QEVENT_SUSPEND_DISK] = "SUSPEND_DISK",
     [QEVENT_WAKEUP] = "WAKEUP",
     [QEVENT_BALLOON_CHANGE] = "BALLOON_CHANGE",
+    [QEVENT_SPICE_MIGRATE_COMPLETED] = "SPICE_MIGRATE_COMPLETED",
 };
 QEMU_BUILD_BUG_ON(ARRAY_SIZE(monitor_event_names) != QEVENT_MAX)
 
diff --git a/monitor.h b/monitor.h
index 47d556b..5fc2983 100644
--- a/monitor.h
+++ b/monitor.h
@@ -43,6 +43,7 @@ typedef enum MonitorEvent {
     QEVENT_SUSPEND_DISK,
     QEVENT_WAKEUP,
     QEVENT_BALLOON_CHANGE,
+    QEVENT_SPICE_MIGRATE_COMPLETED,
 
     /* Add to 'monitor_event_names' array in monitor.c when
      * defining new events here */
diff --git a/ui/spice-core.c b/ui/spice-core.c
index fa78cc3..73f8a95 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -285,6 +285,7 @@ typedef struct SpiceMigration {
 } SpiceMigration;
 
 static void migrate_connect_complete_cb(SpiceMigrateInstance *sin);
+static void migrate_end_complete_cb(SpiceMigrateInstance *sin);
 
 static const SpiceMigrateInterface migrate_interface = {
     .base.type = SPICE_INTERFACE_MIGRATION,
@@ -292,7 +293,7 @@ static const SpiceMigrateInterface migrate_interface = {
     .base.major_version = SPICE_INTERFACE_MIGRATION_MAJOR,
     .base.minor_version = SPICE_INTERFACE_MIGRATION_MINOR,
     .migrate_connect_complete = migrate_connect_complete_cb,
-    .migrate_end_complete = NULL,
+    .migrate_end_complete = migrate_end_complete_cb,
 };
 
 static SpiceMigration spice_migrate;
@@ -305,6 +306,11 @@ static void migrate_connect_complete_cb(SpiceMigrateInstance *sin)
     }
     sm->connect_complete.cb = NULL;
 }
+
+static void migrate_end_complete_cb(SpiceMigrateInstance *sin)
+{
+    monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
+}
 #endif
 
 /* config string parsing */
@@ -488,6 +494,7 @@ static void migration_state_notifier(Notifier *notifier, void *data)
     } else if (migration_has_finished(s)) {
 #ifndef SPICE_INTERFACE_MIGRATION
         spice_server_migrate_switch(spice_server);
+        monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
 #else
         spice_server_migrate_end(spice_server, true);
     } else if (migration_has_failed(s)) {
-- 
1.7.7.6

Re: [Qemu-devel] [PATCH v3 3/5] spice migration: add QEVENT_SPICE_MIGRATE_COMPLETED

[Luiz Capitulino]

On Tue, 21 Aug 2012 11:51:57 +0300
Yonit Halperin <yhalperi@redhat.com> wrote:

> When migrating, libvirt queries the migration status, and upon migration
> completions, it closes the migration src. On the other hand, when
> migration is completed, spice transfers data from the src to destination
> via the client. This data is required for keeping the spice session
> after migration, without suffering from data loss and inconsistencies.
> In order to allow this data transfer, we add QEVENT for signaling
> libvirt that spice migration has completed, and libvirt needs to wait
> for this event before quitting the src process.
> 
> Signed-off-by: Yonit Halperin <yhalperi@redhat.com>

Acked-by: Luiz Capitulino <lcapitulino@redhat.com>

> ---
>  monitor.c       |    1 +
>  monitor.h       |    1 +
>  ui/spice-core.c |    9 ++++++++-
>  3 files changed, 10 insertions(+), 1 deletions(-)
> 
> diff --git a/monitor.c b/monitor.c
> index ce42466..584efe0 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -455,6 +455,7 @@ static const char *monitor_event_names[] = {
>      [QEVENT_SUSPEND_DISK] = "SUSPEND_DISK",
>      [QEVENT_WAKEUP] = "WAKEUP",
>      [QEVENT_BALLOON_CHANGE] = "BALLOON_CHANGE",
> +    [QEVENT_SPICE_MIGRATE_COMPLETED] = "SPICE_MIGRATE_COMPLETED",
>  };
>  QEMU_BUILD_BUG_ON(ARRAY_SIZE(monitor_event_names) != QEVENT_MAX)
>  
> diff --git a/monitor.h b/monitor.h
> index 47d556b..5fc2983 100644
> --- a/monitor.h
> +++ b/monitor.h
> @@ -43,6 +43,7 @@ typedef enum MonitorEvent {
>      QEVENT_SUSPEND_DISK,
>      QEVENT_WAKEUP,
>      QEVENT_BALLOON_CHANGE,
> +    QEVENT_SPICE_MIGRATE_COMPLETED,
>  
>      /* Add to 'monitor_event_names' array in monitor.c when
>       * defining new events here */
> diff --git a/ui/spice-core.c b/ui/spice-core.c
> index fa78cc3..73f8a95 100644
> --- a/ui/spice-core.c
> +++ b/ui/spice-core.c
> @@ -285,6 +285,7 @@ typedef struct SpiceMigration {
>  } SpiceMigration;
>  
>  static void migrate_connect_complete_cb(SpiceMigrateInstance *sin);
> +static void migrate_end_complete_cb(SpiceMigrateInstance *sin);
>  
>  static const SpiceMigrateInterface migrate_interface = {
>      .base.type = SPICE_INTERFACE_MIGRATION,
> @@ -292,7 +293,7 @@ static const SpiceMigrateInterface migrate_interface = {
>      .base.major_version = SPICE_INTERFACE_MIGRATION_MAJOR,
>      .base.minor_version = SPICE_INTERFACE_MIGRATION_MINOR,
>      .migrate_connect_complete = migrate_connect_complete_cb,
> -    .migrate_end_complete = NULL,
> +    .migrate_end_complete = migrate_end_complete_cb,
>  };
>  
>  static SpiceMigration spice_migrate;
> @@ -305,6 +306,11 @@ static void migrate_connect_complete_cb(SpiceMigrateInstance *sin)
>      }
>      sm->connect_complete.cb = NULL;
>  }
> +
> +static void migrate_end_complete_cb(SpiceMigrateInstance *sin)
> +{
> +    monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
> +}
>  #endif
>  
>  /* config string parsing */
> @@ -488,6 +494,7 @@ static void migration_state_notifier(Notifier *notifier, void *data)
>      } else if (migration_has_finished(s)) {
>  #ifndef SPICE_INTERFACE_MIGRATION
>          spice_server_migrate_switch(spice_server);
> +        monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
>  #else
>          spice_server_migrate_end(spice_server, true);
>      } else if (migration_has_failed(s)) {

[Qemu-devel] [PATCH v3 4/5] spice: add 'migrated' flag to spice info

[Yonit Halperin]

The flag is 'true' when spice migration has completed on the src side.
It is needed for a case where libvirt dies before migration completes
and it misses the event QEVENT_SPICE_MIGRATE_COMPLETED.
When libvirt is restored and queries the migration status, it also needs
to query spice and check if its migration has completed.

Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
---
 hmp.c            |    2 ++
 qapi-schema.json |    5 ++++-
 ui/spice-core.c  |    4 ++++
 3 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/hmp.c b/hmp.c
index a9d5675..62f4dee 100644
--- a/hmp.c
+++ b/hmp.c
@@ -413,6 +413,8 @@ void hmp_info_spice(Monitor *mon)
         monitor_printf(mon, "     address: %s:%" PRId64 " [tls]\n",
                        info->host, info->tls_port);
     }
+    monitor_printf(mon, "    migrated: %s\n",
+                   info->migrated ? "true" : "false");
     monitor_printf(mon, "        auth: %s\n", info->auth);
     monitor_printf(mon, "    compiled: %s\n", info->compiled_version);
     monitor_printf(mon, "  mouse-mode: %s\n",
diff --git a/qapi-schema.json b/qapi-schema.json
index 3d2b2d1..bf3f924 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -808,6 +808,9 @@
 #
 # @enabled: true if the SPICE server is enabled, false otherwise
 #
+# @migrated: true if the last guest migration completed and spice
+#            migration had completed as well. false otherwise.
+#
 # @host: #optional The hostname the SPICE server is bound to.  This depends on
 #        the name resolution on the host and may be an IP address.
 #
@@ -833,7 +836,7 @@
 # Since: 0.14.0
 ##
 { 'type': 'SpiceInfo',
-  'data': {'enabled': 'bool', '*host': 'str', '*port': 'int',
+  'data': {'enabled': 'bool', 'migrated': 'bool', '*host': 'str', '*port': 'int',
            '*tls-port': 'int', '*auth': 'str', '*compiled-version': 'str',
            'mouse-mode': 'SpiceQueryMouseMode', '*channels': ['SpiceChannel']} }
 
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 73f8a95..5d82c8d 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -46,6 +46,7 @@ static Notifier migration_state;
 static const char *auth = "spice";
 static char *auth_passwd;
 static time_t auth_expires = TIME_MAX;
+static int spice_migration_completed;
 int using_spice = 0;
 
 static QemuThread me;
@@ -310,6 +311,7 @@ static void migrate_connect_complete_cb(SpiceMigrateInstance *sin)
 static void migrate_end_complete_cb(SpiceMigrateInstance *sin)
 {
     monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
+    spice_migration_completed = true;
 }
 #endif
 
@@ -442,6 +444,7 @@ SpiceInfo *qmp_query_spice(Error **errp)
     }
 
     info->enabled = true;
+    info->migrated = spice_migration_completed;
 
     addr = qemu_opt_get(opts, "addr");
     port = qemu_opt_get_number(opts, "port", 0);
@@ -495,6 +498,7 @@ static void migration_state_notifier(Notifier *notifier, void *data)
 #ifndef SPICE_INTERFACE_MIGRATION
         spice_server_migrate_switch(spice_server);
         monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
+        spice_migration_completed = true;
 #else
         spice_server_migrate_end(spice_server, true);
     } else if (migration_has_failed(s)) {
-- 
1.7.7.6

Re: [Qemu-devel] [PATCH v3 4/5] spice: add 'migrated' flag to spice info

[Luiz Capitulino]

On Tue, 21 Aug 2012 11:51:58 +0300
Yonit Halperin <yhalperi@redhat.com> wrote:

> The flag is 'true' when spice migration has completed on the src side.
> It is needed for a case where libvirt dies before migration completes
> and it misses the event QEVENT_SPICE_MIGRATE_COMPLETED.
> When libvirt is restored and queries the migration status, it also needs
> to query spice and check if its migration has completed.
> 
> Signed-off-by: Yonit Halperin <yhalperi@redhat.com>

Acked-by: Luiz Capitulino <lcapitulino@redhat.com>

> ---
>  hmp.c            |    2 ++
>  qapi-schema.json |    5 ++++-
>  ui/spice-core.c  |    4 ++++
>  3 files changed, 10 insertions(+), 1 deletions(-)
> 
> diff --git a/hmp.c b/hmp.c
> index a9d5675..62f4dee 100644
> --- a/hmp.c
> +++ b/hmp.c
> @@ -413,6 +413,8 @@ void hmp_info_spice(Monitor *mon)
>          monitor_printf(mon, "     address: %s:%" PRId64 " [tls]\n",
>                         info->host, info->tls_port);
>      }
> +    monitor_printf(mon, "    migrated: %s\n",
> +                   info->migrated ? "true" : "false");
>      monitor_printf(mon, "        auth: %s\n", info->auth);
>      monitor_printf(mon, "    compiled: %s\n", info->compiled_version);
>      monitor_printf(mon, "  mouse-mode: %s\n",
> diff --git a/qapi-schema.json b/qapi-schema.json
> index 3d2b2d1..bf3f924 100644
> --- a/qapi-schema.json
> +++ b/qapi-schema.json
> @@ -808,6 +808,9 @@
>  #
>  # @enabled: true if the SPICE server is enabled, false otherwise
>  #
> +# @migrated: true if the last guest migration completed and spice
> +#            migration had completed as well. false otherwise.
> +#
>  # @host: #optional The hostname the SPICE server is bound to.  This depends on
>  #        the name resolution on the host and may be an IP address.
>  #
> @@ -833,7 +836,7 @@
>  # Since: 0.14.0
>  ##
>  { 'type': 'SpiceInfo',
> -  'data': {'enabled': 'bool', '*host': 'str', '*port': 'int',
> +  'data': {'enabled': 'bool', 'migrated': 'bool', '*host': 'str', '*port': 'int',
>             '*tls-port': 'int', '*auth': 'str', '*compiled-version': 'str',
>             'mouse-mode': 'SpiceQueryMouseMode', '*channels': ['SpiceChannel']} }
>  
> diff --git a/ui/spice-core.c b/ui/spice-core.c
> index 73f8a95..5d82c8d 100644
> --- a/ui/spice-core.c
> +++ b/ui/spice-core.c
> @@ -46,6 +46,7 @@ static Notifier migration_state;
>  static const char *auth = "spice";
>  static char *auth_passwd;
>  static time_t auth_expires = TIME_MAX;
> +static int spice_migration_completed;
>  int using_spice = 0;
>  
>  static QemuThread me;
> @@ -310,6 +311,7 @@ static void migrate_connect_complete_cb(SpiceMigrateInstance *sin)
>  static void migrate_end_complete_cb(SpiceMigrateInstance *sin)
>  {
>      monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
> +    spice_migration_completed = true;
>  }
>  #endif
>  
> @@ -442,6 +444,7 @@ SpiceInfo *qmp_query_spice(Error **errp)
>      }
>  
>      info->enabled = true;
> +    info->migrated = spice_migration_completed;
>  
>      addr = qemu_opt_get(opts, "addr");
>      port = qemu_opt_get_number(opts, "port", 0);
> @@ -495,6 +498,7 @@ static void migration_state_notifier(Notifier *notifier, void *data)
>  #ifndef SPICE_INTERFACE_MIGRATION
>          spice_server_migrate_switch(spice_server);
>          monitor_protocol_event(QEVENT_SPICE_MIGRATE_COMPLETED, NULL);
> +        spice_migration_completed = true;
>  #else
>          spice_server_migrate_end(spice_server, true);
>      } else if (migration_has_failed(s)) {

[Qemu-devel] [PATCH v3 5/5] spice: adding seamless-migration option to the command line

[Yonit Halperin]

The seamless-migration flag is required in order to identify
whether libvirt supports the new QEVENT_SPICE_MIGRATE_COMPLETED or not
(by default the flag is off).
New libvirt versions that wait for QEVENT_SPICE_MIGRATE_COMPLETED should turn on this flag.
When this flag is off, spice fallbacks to its old migration method, which
can result in data loss.

Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
---
 qemu-config.c   |    3 +++
 qemu-options.hx |    3 +++
 ui/spice-core.c |    7 +++++++
 3 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/qemu-config.c b/qemu-config.c
index 5c3296b..b7bb28f 100644
--- a/qemu-config.c
+++ b/qemu-config.c
@@ -524,6 +524,9 @@ QemuOptsList qemu_spice_opts = {
         },{
             .name = "playback-compression",
             .type = QEMU_OPT_BOOL,
+        }, {
+            .name = "seamless-migration",
+            .type = QEMU_OPT_BOOL,
         },
         { /* end of list */ }
     },
diff --git a/qemu-options.hx b/qemu-options.hx
index 47cb5bd..0727f4f 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -917,6 +917,9 @@ Enable/disable passing mouse events via vdagent.  Default is on.
 @item playback-compression=[on|off]
 Enable/disable audio stream compression (using celt 0.5.1).  Default is on.
 
+@item seamless-migration=[on|off]
+Enable/disable spice seamless migration. Default is off.
+
 @end table
 ETEXI
 
diff --git a/ui/spice-core.c b/ui/spice-core.c
index 5d82c8d..d447334 100644
--- a/ui/spice-core.c
+++ b/ui/spice-core.c
@@ -584,6 +584,9 @@ void qemu_spice_init(void)
     int port, tls_port, len, addr_flags;
     spice_image_compression_t compression;
     spice_wan_compression_t wan_compr;
+#if SPICE_SERVER_VERSION >= 0x000b02 /* 0.11.2 */
+    bool seamless_migration;
+#endif
 
     qemu_thread_get_self(&me);
 
@@ -727,6 +730,10 @@ void qemu_spice_init(void)
     spice_server_set_uuid(spice_server, qemu_uuid);
 #endif
 
+#if SPICE_SERVER_VERSION >= 0x000b02 /* 0.11.2 */
+    seamless_migration = qemu_opt_get_bool(opts, "seamless-migration", 0);
+    spice_server_set_seamless_migration(spice_server, seamless_migration);
+#endif
     if (0 != spice_server_init(spice_server, &core_interface)) {
         error_report("failed to initialize spice server");
         exit(1);
-- 
1.7.7.6

Re: [Qemu-devel] [PATCH v3 0/5] add support for spice migration v3

[Michal Privoznik]

On 21.08.2012 10:51, Yonit Halperin wrote:
> v3:
> patch 2: hold a global variable for the state of spice display, instead of one per
>          device.
> 
> v2:
> Notify spice about vm state changes only via spice_server_vm_start/stop
> spice repo:  http://cgit.freedesktop.org/~yhalperi/spice/log/?h=seamless-migration.v2
> -----------
> Hi,
> 
> The following series introduces support for keeping the spice session active after migration.
> For more details about spice seamless migration, see
> http://lists.freedesktop.org/archives/spice-devel/2012-August/010412.html
> 
> Spice branches with seamless migration support can be found at:
> spice-protocol: http://cgit.freedesktop.org/~yhalperi/spice-protocol/log/?h=seamless-migration.v1
> spice-common: http://cgit.freedesktop.org/~yhalperi/spice-common/log/
> spice: http://cgit.freedesktop.org/~yhalperi/spice/log/?h=seamless-migration.v1
> spicei-gtk: http://cgit.freedesktop.org/~yhalperi/spice-gtk/log/
> 
> Regards,
> Yonit.
> 
> Yonit Halperin (5):
>   spice: notify spice server on vm start/stop
>   spice: notify on vm state change only via spice_server_vm_start/stop
>   spice migration: add QEVENT_SPICE_MIGRATE_COMPLETED
>   spice: add 'migrated' flag to spice info
>   spice: adding seamless-migration option to the command line
> 
>  hmp.c              |    2 ++
>  hw/qxl.c           |    7 ++++---
>  monitor.c          |    1 +
>  monitor.h          |    1 +
>  qapi-schema.json   |    5 ++++-
>  qemu-config.c      |    3 +++
>  qemu-options.hx    |    3 +++
>  ui/spice-core.c    |   38 +++++++++++++++++++++++++++++++++++++-
>  ui/spice-display.c |   32 ++++++++++++++++++++++++++++++--
>  ui/spice-display.h |    9 +++++++--
>  10 files changed, 92 insertions(+), 9 deletions(-)
> 

Okay, from libvirt POV this is easily doable.
One one hand, libvirt doesn't query for 'query-spice' yet. But on the
other hand, we can start to if libvirt would know qemu supports it.
And it will indeed - assuming qemu will report 'seamless-migration'
option in -help output.

Michal

Re: [Qemu-devel] [PATCH v3 0/5] add support for spice migration v3

[Gerd Hoffmann]

> Yonit Halperin (5):
>   spice: notify spice server on vm start/stop
>   spice: notify on vm state change only via spice_server_vm_start/stop
>   spice migration: add QEVENT_SPICE_MIGRATE_COMPLETED
>   spice: add 'migrated' flag to spice info
>   spice: adding seamless-migration option to the command line

Patches added to spice patch queue.

thanks,
  Gerd