* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu-common.h"
#include "block.h"
#include "qemu_socket.h"
#include "block-migration.h"
-#include "qemu-objects.h"
+#include "qmp-commands.h"
//#define DEBUG_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)
+MigrationInfo *qmp_query_migrate(Error **errp)
{
- 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)
-{
- 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 {
if (s->file) {
DPRINTF("closing file\n");
- if (qemu_fclose(s->file) != 0) {
- ret = -1;
- }
+ ret = qemu_fclose(s->file);
s->file = NULL;
} else {
if (s->mon) {
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);
}
}
}
DPRINTF("iterate\n");
- ret = qemu_savevm_state_iterate(s->mon, s->file);
+ ret = qemu_savevm_state_iterate(s->file);
if (ret < 0) {
migrate_fd_error(s);
} else if (ret == 1) {
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) {
+ if (qemu_savevm_state_complete(s->file) < 0) {
migrate_fd_error(s);
} else {
migrate_fd_completed(s);
s->state = MIG_STATE_CANCELLED;
notifier_list_notify(&migration_state_notifiers, s);
- qemu_savevm_state_cancel(s->mon, s->file);
+ qemu_savevm_state_cancel(s->file);
migrate_fd_cleanup(s);
}
void remove_migration_state_change_notifier(Notifier *notify)
{
- notifier_list_remove(&migration_state_notifiers, notify);
+ notifier_remove(notify);
+}
+
+bool migration_is_active(MigrationState *s)
+{
+ return s->state == MIG_STATE_ACTIVE;
}
bool migration_has_finished(MigrationState *s)
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)
{
int ret;
migrate_fd_close);
DPRINTF("beginning savevm\n");
- ret = qemu_savevm_state_begin(s->mon, s->file, s->blk, s->shared);
+ ret = qemu_savevm_state_begin(s->file, s->blk, s->shared);
if (ret < 0) {
DPRINTF("failed, %d\n", ret);
migrate_fd_error(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;
}
+ 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)) {
return ret;
}
+ if (detach) {
+ s->mon = NULL;
+ }
+
notifier_list_notify(&migration_state_notifiers, s);
return 0;
}
-int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data)
+void qmp_migrate_cancel(Error **errp)
{
migrate_fd_cancel(migrate_get_current());
- return 0;
}
-int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data)
+void qmp_migrate_set_speed(int64_t value, Error **errp)
{
- int64_t d;
MigrationState *s;
- d = qdict_get_int(qdict, "value");
- if (d < 0) {
- d = 0;
+ if (value < 0) {
+ value = 0;
}
s = migrate_get_current();
- s->bandwidth_limit = d;
+ s->bandwidth_limit = value;
qemu_file_set_rate_limit(s->file, s->bandwidth_limit);
-
- return 0;
}
-int do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
- QObject **ret_data)
+void qmp_migrate_set_downtime(double value, Error **errp)
{
- double d;
-
- d = qdict_get_double(qdict, "value") * 1e9;
- d = MAX(0, MIN(UINT64_MAX, d));
- max_downtime = (uint64_t)d;
-
- return 0;
+ value *= 1e9;
+ value = MAX(0, MIN(UINT64_MAX, value));
+ max_downtime = (uint64_t)value;
}
projects / qemu.git / blobdiff