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43aef7e632
The QERR_ macros are leftovers from the days of "rich" error objects.
We've been trying to reduce their remaining use.
Get rid of a use of QERR_FEATURE_DISABLED, and improve the somewhat
imprecise error message
(qemu) x_colo_lost_heartbeat
Error: The feature 'colo' is not enabled
to
Error: VM is not in COLO mode
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230207075115.1525-12-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
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* COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
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* (a.k.a. Fault Tolerance or Continuous Replication)
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*
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* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
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* Copyright (c) 2016 FUJITSU LIMITED
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* Copyright (c) 2016 Intel Corporation
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "migration/colo.h"
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#include "migration/failover.h"
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#include "qemu/main-loop.h"
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#include "migration.h"
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#include "qapi/error.h"
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#include "qapi/qapi-commands-migration.h"
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#include "qemu/error-report.h"
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#include "trace.h"
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static QEMUBH *failover_bh;
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static FailoverStatus failover_state;
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static void colo_failover_bh(void *opaque)
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{
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int old_state;
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qemu_bh_delete(failover_bh);
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failover_bh = NULL;
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old_state = failover_set_state(FAILOVER_STATUS_REQUIRE,
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FAILOVER_STATUS_ACTIVE);
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if (old_state != FAILOVER_STATUS_REQUIRE) {
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error_report("Unknown error for failover, old_state = %s",
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FailoverStatus_str(old_state));
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return;
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}
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colo_do_failover();
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}
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void failover_request_active(Error **errp)
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{
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if (failover_set_state(FAILOVER_STATUS_NONE,
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FAILOVER_STATUS_REQUIRE) != FAILOVER_STATUS_NONE) {
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error_setg(errp, "COLO failover is already activated");
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return;
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}
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failover_bh = qemu_bh_new(colo_failover_bh, NULL);
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qemu_bh_schedule(failover_bh);
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}
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void failover_init_state(void)
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{
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failover_state = FAILOVER_STATUS_NONE;
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}
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FailoverStatus failover_set_state(FailoverStatus old_state,
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FailoverStatus new_state)
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{
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FailoverStatus old;
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old = qatomic_cmpxchg(&failover_state, old_state, new_state);
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if (old == old_state) {
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trace_colo_failover_set_state(FailoverStatus_str(new_state));
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}
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return old;
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}
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FailoverStatus failover_get_state(void)
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{
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return qatomic_read(&failover_state);
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}
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void qmp_x_colo_lost_heartbeat(Error **errp)
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{
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if (get_colo_mode() == COLO_MODE_NONE) {
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error_setg(errp, "VM is not in COLO mode");
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return;
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}
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failover_request_active(errp);
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}
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