#include "block.h"
#include "qemu_socket.h"
#include "block-migration.h"
-#include "qemu-objects.h"
+#include "qmp-commands.h"
//#define DEBUG_MIGRATION
do { } while (0)
#endif
-/* Migration speed throttling */
-static int64_t max_throttle = (32 << 20);
+enum {
+ MIG_STATE_ERROR,
+ MIG_STATE_SETUP,
+ MIG_STATE_CANCELLED,
+ MIG_STATE_ACTIVE,
+ MIG_STATE_COMPLETED,
+};
+
+#define MAX_THROTTLE (32 << 20) /* Migration speed throttling */
static NotifierList migration_state_notifiers =
NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
{
static MigrationState current_migration = {
.state = MIG_STATE_SETUP,
+ .bandwidth_limit = MAX_THROTTLE,
};
return ¤t_migration;
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 {
return max_downtime;
}
-static void migrate_print_status(Monitor *mon, const char *name,
- const QDict *status_dict)
-{
- QDict *qdict;
-
- qdict = qobject_to_qdict(qdict_get(status_dict, name));
-
- monitor_printf(mon, "transferred %s: %" PRIu64 " kbytes\n", name,
- qdict_get_int(qdict, "transferred") >> 10);
- monitor_printf(mon, "remaining %s: %" PRIu64 " kbytes\n", name,
- qdict_get_int(qdict, "remaining") >> 10);
- monitor_printf(mon, "total %s: %" PRIu64 " kbytes\n", name,
- qdict_get_int(qdict, "total") >> 10);
-}
-
-void do_info_migrate_print(Monitor *mon, const QObject *data)
-{
- QDict *qdict;
-
- qdict = qobject_to_qdict(data);
-
- monitor_printf(mon, "Migration status: %s\n",
- qdict_get_str(qdict, "status"));
-
- if (qdict_haskey(qdict, "ram")) {
- migrate_print_status(mon, "ram", qdict);
- }
-
- if (qdict_haskey(qdict, "disk")) {
- migrate_print_status(mon, "disk", qdict);
- }
-}
-
-static void migrate_put_status(QDict *qdict, const char *name,
- uint64_t trans, uint64_t rem, uint64_t total)
+MigrationInfo *qmp_query_migrate(Error **errp)
{
- QObject *obj;
-
- obj = qobject_from_jsonf("{ 'transferred': %" PRId64 ", "
- "'remaining': %" PRId64 ", "
- "'total': %" PRId64 " }", trans, rem, total);
- qdict_put_obj(qdict, name, obj);
-}
-
-void do_info_migrate(Monitor *mon, QObject **ret_data)
-{
- QDict *qdict;
+ MigrationInfo *info = g_malloc0(sizeof(*info));
MigrationState *s = migrate_get_current();
switch (s->state) {
/* no migration has happened ever */
break;
case MIG_STATE_ACTIVE:
- qdict = qdict_new();
- qdict_put(qdict, "status", qstring_from_str("active"));
+ info->has_status = true;
+ info->status = g_strdup("active");
- migrate_put_status(qdict, "ram", ram_bytes_transferred(),
- ram_bytes_remaining(), ram_bytes_total());
+ info->has_ram = true;
+ info->ram = g_malloc0(sizeof(*info->ram));
+ info->ram->transferred = ram_bytes_transferred();
+ info->ram->remaining = ram_bytes_remaining();
+ info->ram->total = ram_bytes_total();
if (blk_mig_active()) {
- migrate_put_status(qdict, "disk", blk_mig_bytes_transferred(),
- blk_mig_bytes_remaining(),
- blk_mig_bytes_total());
+ info->has_disk = true;
+ info->disk = g_malloc0(sizeof(*info->disk));
+ info->disk->transferred = blk_mig_bytes_transferred();
+ info->disk->remaining = blk_mig_bytes_remaining();
+ info->disk->total = blk_mig_bytes_total();
}
-
- *ret_data = QOBJECT(qdict);
break;
case MIG_STATE_COMPLETED:
- *ret_data = qobject_from_jsonf("{ 'status': 'completed' }");
+ info->has_status = true;
+ info->status = g_strdup("completed");
break;
case MIG_STATE_ERROR:
- *ret_data = qobject_from_jsonf("{ 'status': 'failed' }");
+ info->has_status = true;
+ info->status = g_strdup("failed");
break;
case MIG_STATE_CANCELLED:
- *ret_data = qobject_from_jsonf("{ 'status': 'cancelled' }");
+ info->has_status = true;
+ info->status = g_strdup("cancelled");
break;
}
+
+ return info;
}
/* shared migration helpers */
static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
{
- s->mon = mon;
if (monitor_suspend(mon) == 0) {
DPRINTF("suspending monitor\n");
} else {
{
DPRINTF("setting error state\n");
s->state = MIG_STATE_ERROR;
- notifier_list_notify(&migration_state_notifiers, NULL);
+ notifier_list_notify(&migration_state_notifiers, s);
migrate_fd_cleanup(s);
}
s->state = MIG_STATE_COMPLETED;
runstate_set(RUN_STATE_POSTMIGRATE);
}
- notifier_list_notify(&migration_state_notifiers, NULL);
+ notifier_list_notify(&migration_state_notifiers, s);
}
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);
}
}
int old_vm_running = runstate_is_running();
DPRINTF("done iterating\n");
- vm_stop(RUN_STATE_FINISH_MIGRATE);
+ vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
if (qemu_savevm_state_complete(s->mon, s->file) < 0) {
migrate_fd_error(s);
DPRINTF("cancelling migration\n");
s->state = MIG_STATE_CANCELLED;
- notifier_list_notify(&migration_state_notifiers, NULL);
+ notifier_list_notify(&migration_state_notifiers, s);
qemu_savevm_state_cancel(s->mon, s->file);
migrate_fd_cleanup(s);
notifier_list_remove(&migration_state_notifiers, notify);
}
-int get_migration_state(void)
+bool migration_is_active(MigrationState *s)
+{
+ return s->state == MIG_STATE_ACTIVE;
+}
+
+bool migration_has_finished(MigrationState *s)
{
- return migrate_get_current()->state;
+ return s->state == MIG_STATE_COMPLETED;
+}
+
+bool migration_has_failed(MigrationState *s)
+{
+ return (s->state == MIG_STATE_CANCELLED ||
+ s->state == MIG_STATE_ERROR);
}
void migrate_fd_connect(MigrationState *s)
migrate_fd_put_ready(s);
}
-static MigrationState *migrate_init(Monitor *mon, int64_t bandwidth_limit,
- int detach, int blk, int inc)
+static MigrationState *migrate_init(Monitor *mon, int detach, int blk, int inc)
{
MigrationState *s = migrate_get_current();
+ int64_t bandwidth_limit = s->bandwidth_limit;
memset(s, 0, sizeof(*s));
+ 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;
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();
return -1;
}
- s = migrate_init(mon, max_throttle, detach, blk, inc);
+ 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)) {
ret = tcp_start_outgoing_migration(s, p);
return ret;
}
- notifier_list_notify(&migration_state_notifiers, NULL);
+ if (detach) {
+ s->mon = NULL;
+ }
+
+ notifier_list_notify(&migration_state_notifiers, s);
return 0;
}
if (d < 0) {
d = 0;
}
- max_throttle = d;
s = migrate_get_current();
- qemu_file_set_rate_limit(s->file, max_throttle);
+ s->bandwidth_limit = d;
+ qemu_file_set_rate_limit(s->file, s->bandwidth_limit);
return 0;
}
projects / qemu.git / blobdiff