2008-10-13 05:12:02 +02:00
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/*
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* QEMU live migration
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*
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* Copyright IBM, Corp. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "qemu-common.h"
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#include "migration.h"
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2009-03-06 00:01:23 +01:00
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#include "monitor.h"
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2008-11-11 17:46:33 +01:00
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#include "buffered_file.h"
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#include "sysemu.h"
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#include "block.h"
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#include "qemu_socket.h"
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2009-11-30 18:21:21 +01:00
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#include "block-migration.h"
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2011-09-13 22:37:16 +02:00
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#include "qmp-commands.h"
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2008-11-11 17:46:33 +01:00
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//#define DEBUG_MIGRATION
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#ifdef DEBUG_MIGRATION
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2010-02-07 00:03:50 +01:00
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#define DPRINTF(fmt, ...) \
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2008-11-11 17:46:33 +01:00
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do { printf("migration: " fmt, ## __VA_ARGS__); } while (0)
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#else
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2010-02-07 00:03:50 +01:00
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#define DPRINTF(fmt, ...) \
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2008-11-11 17:46:33 +01:00
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do { } while (0)
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#endif
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2008-10-13 05:12:02 +02:00
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2011-02-23 00:48:46 +01:00
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enum {
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MIG_STATE_ERROR,
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MIG_STATE_SETUP,
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MIG_STATE_CANCELLED,
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MIG_STATE_ACTIVE,
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MIG_STATE_COMPLETED,
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};
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2008-10-13 05:12:02 +02:00
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2011-02-23 00:33:19 +01:00
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#define MAX_THROTTLE (32 << 20) /* Migration speed throttling */
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2008-10-13 05:12:02 +02:00
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2010-12-13 17:30:12 +01:00
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static NotifierList migration_state_notifiers =
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NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
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2011-10-05 13:50:43 +02:00
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/* When we add fault tolerance, we could have several
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migrations at once. For now we don't need to add
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dynamic creation of migration */
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static MigrationState *migrate_get_current(void)
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{
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static MigrationState current_migration = {
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.state = MIG_STATE_SETUP,
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2011-02-23 00:33:19 +01:00
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.bandwidth_limit = MAX_THROTTLE,
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2011-10-05 13:50:43 +02:00
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};
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return ¤t_migration;
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}
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2010-06-09 14:10:54 +02:00
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int qemu_start_incoming_migration(const char *uri)
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2008-10-13 05:12:02 +02:00
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{
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2008-10-13 05:14:31 +02:00
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const char *p;
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2010-06-09 14:10:54 +02:00
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int ret;
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2008-10-13 05:14:31 +02:00
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if (strstart(uri, "tcp:", &p))
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2010-06-09 14:10:54 +02:00
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ret = tcp_start_incoming_migration(p);
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2008-11-11 17:46:33 +01:00
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#if !defined(WIN32)
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else if (strstart(uri, "exec:", &p))
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2010-06-09 14:10:54 +02:00
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ret = exec_start_incoming_migration(p);
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2009-08-05 17:24:29 +02:00
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else if (strstart(uri, "unix:", &p))
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2010-06-09 14:10:54 +02:00
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ret = unix_start_incoming_migration(p);
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2009-08-18 15:56:25 +02:00
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else if (strstart(uri, "fd:", &p))
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2010-06-09 14:10:54 +02:00
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ret = fd_start_incoming_migration(p);
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2008-11-11 17:46:33 +01:00
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#endif
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2010-06-09 14:10:54 +02:00
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else {
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2008-10-13 05:14:31 +02:00
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fprintf(stderr, "unknown migration protocol: %s\n", uri);
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2010-06-09 14:10:54 +02:00
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ret = -EPROTONOSUPPORT;
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}
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return ret;
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2008-10-13 05:12:02 +02:00
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}
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2010-06-09 14:10:55 +02:00
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void process_incoming_migration(QEMUFile *f)
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{
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if (qemu_loadvm_state(f) < 0) {
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fprintf(stderr, "load of migration failed\n");
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exit(0);
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}
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qemu_announce_self();
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DPRINTF("successfully loaded vm state\n");
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2011-11-14 22:09:45 +01:00
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/* Make sure all file formats flush their mutable metadata */
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bdrv_invalidate_cache_all();
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2011-07-29 20:04:45 +02:00
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if (autostart) {
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2010-06-09 14:10:55 +02:00
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vm_start();
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2011-07-29 20:04:45 +02:00
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} else {
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2011-09-30 19:45:27 +02:00
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runstate_set(RUN_STATE_PRELAUNCH);
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2011-07-29 20:04:45 +02:00
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}
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2010-06-09 14:10:55 +02:00
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}
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2009-05-28 21:22:57 +02:00
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/* amount of nanoseconds we are willing to wait for migration to be down.
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* the choice of nanoseconds is because it is the maximum resolution that
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* get_clock() can achieve. It is an internal measure. All user-visible
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* units must be in seconds */
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static uint64_t max_downtime = 30000000;
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uint64_t migrate_max_downtime(void)
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{
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return max_downtime;
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}
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2011-09-13 22:37:16 +02:00
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MigrationInfo *qmp_query_migrate(Error **errp)
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2008-10-13 05:12:02 +02:00
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{
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2011-09-13 22:37:16 +02:00
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MigrationInfo *info = g_malloc0(sizeof(*info));
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2011-10-05 13:50:43 +02:00
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MigrationState *s = migrate_get_current();
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switch (s->state) {
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case MIG_STATE_SETUP:
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/* no migration has happened ever */
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break;
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case MIG_STATE_ACTIVE:
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2011-09-13 22:37:16 +02:00
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info->has_status = true;
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info->status = g_strdup("active");
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2011-10-05 13:50:43 +02:00
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2011-09-13 22:37:16 +02:00
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info->has_ram = true;
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info->ram = g_malloc0(sizeof(*info->ram));
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info->ram->transferred = ram_bytes_transferred();
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info->ram->remaining = ram_bytes_remaining();
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info->ram->total = ram_bytes_total();
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2011-10-05 13:50:43 +02:00
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if (blk_mig_active()) {
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2011-09-13 22:37:16 +02:00
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info->has_disk = true;
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info->disk = g_malloc0(sizeof(*info->disk));
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info->disk->transferred = blk_mig_bytes_transferred();
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info->disk->remaining = blk_mig_bytes_remaining();
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info->disk->total = blk_mig_bytes_total();
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2008-10-25 00:10:31 +02:00
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}
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2011-10-05 13:50:43 +02:00
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break;
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case MIG_STATE_COMPLETED:
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2011-09-13 22:37:16 +02:00
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info->has_status = true;
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info->status = g_strdup("completed");
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2011-10-05 13:50:43 +02:00
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break;
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case MIG_STATE_ERROR:
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2011-09-13 22:37:16 +02:00
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info->has_status = true;
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info->status = g_strdup("failed");
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2011-10-05 13:50:43 +02:00
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break;
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case MIG_STATE_CANCELLED:
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2011-09-13 22:37:16 +02:00
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info->has_status = true;
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info->status = g_strdup("cancelled");
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2011-10-05 13:50:43 +02:00
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break;
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2008-10-13 05:12:02 +02:00
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}
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2011-09-13 22:37:16 +02:00
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return info;
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2008-10-13 05:12:02 +02:00
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}
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2008-11-11 17:46:33 +01:00
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/* shared migration helpers */
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2010-05-11 16:28:39 +02:00
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static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
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2009-03-06 00:01:42 +01:00
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{
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2009-11-30 18:21:21 +01:00
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if (monitor_suspend(mon) == 0) {
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2010-02-07 00:03:50 +01:00
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DPRINTF("suspending monitor\n");
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2009-11-30 18:21:21 +01:00
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} else {
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monitor_printf(mon, "terminal does not allow synchronous "
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2009-03-06 00:01:51 +01:00
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"migration, continuing detached\n");
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2009-11-30 18:21:21 +01:00
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}
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2009-03-06 00:01:42 +01:00
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}
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2011-09-11 20:28:22 +02:00
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static int migrate_fd_cleanup(MigrationState *s)
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2008-11-11 17:46:33 +01:00
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{
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2010-06-02 21:55:25 +02:00
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int ret = 0;
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2008-11-11 17:46:33 +01:00
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qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
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if (s->file) {
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2010-02-07 00:03:50 +01:00
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DPRINTF("closing file\n");
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2011-11-10 13:41:42 +01:00
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ret = qemu_fclose(s->file);
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2009-11-30 18:21:19 +01:00
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s->file = NULL;
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2011-08-05 09:11:26 +02:00
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} else {
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if (s->mon) {
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monitor_resume(s->mon);
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}
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2008-11-11 17:46:33 +01:00
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}
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2011-08-05 09:11:26 +02:00
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if (s->fd != -1) {
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2008-11-11 17:46:33 +01:00
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close(s->fd);
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2011-08-05 09:11:26 +02:00
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s->fd = -1;
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2009-11-30 18:21:21 +01:00
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}
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2008-11-11 17:46:33 +01:00
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2010-06-02 21:55:25 +02:00
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return ret;
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2008-11-11 17:46:33 +01:00
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}
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2011-09-11 20:28:22 +02:00
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void migrate_fd_error(MigrationState *s)
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2008-11-11 17:46:33 +01:00
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{
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2011-09-11 20:28:22 +02:00
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DPRINTF("setting error state\n");
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s->state = MIG_STATE_ERROR;
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2011-10-05 14:27:52 +02:00
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notifier_list_notify(&migration_state_notifiers, s);
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2011-09-11 20:28:22 +02:00
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migrate_fd_cleanup(s);
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}
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2011-02-22 23:32:54 +01:00
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static void migrate_fd_completed(MigrationState *s)
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{
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DPRINTF("setting completed state\n");
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if (migrate_fd_cleanup(s) < 0) {
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s->state = MIG_STATE_ERROR;
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} else {
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s->state = MIG_STATE_COMPLETED;
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runstate_set(RUN_STATE_POSTMIGRATE);
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}
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2011-10-05 14:27:52 +02:00
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notifier_list_notify(&migration_state_notifiers, s);
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2011-02-22 23:32:54 +01:00
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}
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2011-09-11 20:28:22 +02:00
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static void migrate_fd_put_notify(void *opaque)
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2008-11-11 17:46:33 +01:00
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{
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2010-05-11 15:56:35 +02:00
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MigrationState *s = opaque;
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2008-11-11 17:46:33 +01:00
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qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
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qemu_file_put_notify(s->file);
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2011-10-28 18:59:52 +02:00
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if (s->file && qemu_file_get_error(s->file)) {
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2011-02-22 16:01:24 +01:00
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migrate_fd_error(s);
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}
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2008-11-11 17:46:33 +01:00
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}
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2011-09-11 20:28:22 +02:00
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static ssize_t migrate_fd_put_buffer(void *opaque, const void *data,
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size_t size)
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2008-11-11 17:46:33 +01:00
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{
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2010-05-11 15:56:35 +02:00
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MigrationState *s = opaque;
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2008-11-11 17:46:33 +01:00
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ssize_t ret;
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2011-09-21 22:37:29 +02:00
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if (s->state != MIG_STATE_ACTIVE) {
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return -EIO;
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}
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2008-11-11 17:46:33 +01:00
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do {
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ret = s->write(s, data, size);
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2009-05-19 13:08:53 +02:00
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} while (ret == -1 && ((s->get_error(s)) == EINTR));
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2008-11-11 17:46:33 +01:00
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if (ret == -1)
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ret = -(s->get_error(s));
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2010-08-19 15:18:39 +02:00
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if (ret == -EAGAIN) {
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2008-11-11 17:46:33 +01:00
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qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s);
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2010-08-19 15:18:39 +02:00
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}
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2008-11-11 17:46:33 +01:00
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return ret;
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}
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2011-09-11 20:28:22 +02:00
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static void migrate_fd_put_ready(void *opaque)
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2008-11-11 17:46:33 +01:00
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{
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2010-05-11 15:56:35 +02:00
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MigrationState *s = opaque;
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2008-11-11 17:46:33 +01:00
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int ret;
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if (s->state != MIG_STATE_ACTIVE) {
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2010-02-07 00:03:50 +01:00
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DPRINTF("put_ready returning because of non-active state\n");
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2008-11-11 17:46:33 +01:00
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return;
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}
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2010-02-07 00:03:50 +01:00
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DPRINTF("iterate\n");
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2011-09-22 11:02:14 +02:00
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ret = qemu_savevm_state_iterate(s->mon, s->file);
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if (ret < 0) {
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migrate_fd_error(s);
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} else if (ret == 1) {
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2011-07-29 20:36:43 +02:00
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int old_vm_running = runstate_is_running();
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2009-07-09 20:25:47 +02:00
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2010-02-07 00:03:50 +01:00
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DPRINTF("done iterating\n");
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2011-10-14 16:18:09 +02:00
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vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
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2008-11-11 17:46:33 +01:00
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2011-02-22 23:18:20 +01:00
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if (qemu_savevm_state_complete(s->mon, s->file) < 0) {
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migrate_fd_error(s);
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2009-04-05 21:30:33 +02:00
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} else {
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2011-02-22 23:32:54 +01:00
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migrate_fd_completed(s);
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2009-04-05 21:30:33 +02:00
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}
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2010-05-11 23:28:53 +02:00
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if (s->state != MIG_STATE_COMPLETED) {
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2010-06-02 21:55:25 +02:00
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if (old_vm_running) {
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vm_start();
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}
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2011-07-29 20:04:45 +02:00
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}
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2008-11-11 17:46:33 +01:00
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}
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}
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2010-05-11 16:28:39 +02:00
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static void migrate_fd_cancel(MigrationState *s)
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2008-11-11 17:46:33 +01:00
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{
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if (s->state != MIG_STATE_ACTIVE)
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return;
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|
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("cancelling migration\n");
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
s->state = MIG_STATE_CANCELLED;
|
2011-10-05 14:27:52 +02:00
|
|
|
notifier_list_notify(&migration_state_notifiers, s);
|
2009-11-30 18:21:21 +01:00
|
|
|
qemu_savevm_state_cancel(s->mon, s->file);
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
migrate_fd_cleanup(s);
|
|
|
|
}
|
|
|
|
|
2011-09-11 20:28:22 +02:00
|
|
|
static void migrate_fd_wait_for_unfreeze(void *opaque)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
2010-05-11 15:56:35 +02:00
|
|
|
MigrationState *s = opaque;
|
2008-11-11 17:46:33 +01:00
|
|
|
int ret;
|
|
|
|
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("wait for unfreeze\n");
|
2008-11-11 17:46:33 +01:00
|
|
|
if (s->state != MIG_STATE_ACTIVE)
|
|
|
|
return;
|
|
|
|
|
|
|
|
do {
|
|
|
|
fd_set wfds;
|
|
|
|
|
|
|
|
FD_ZERO(&wfds);
|
|
|
|
FD_SET(s->fd, &wfds);
|
|
|
|
|
|
|
|
ret = select(s->fd + 1, NULL, &wfds, NULL, NULL);
|
|
|
|
} while (ret == -1 && (s->get_error(s)) == EINTR);
|
2011-09-21 22:46:36 +02:00
|
|
|
|
|
|
|
if (ret == -1) {
|
2011-09-21 23:01:54 +02:00
|
|
|
qemu_file_set_error(s->file, -s->get_error(s));
|
2011-09-21 22:46:36 +02:00
|
|
|
}
|
2008-11-11 17:46:33 +01:00
|
|
|
}
|
|
|
|
|
2011-09-11 20:28:22 +02:00
|
|
|
static int migrate_fd_close(void *opaque)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
2010-05-11 15:56:35 +02:00
|
|
|
MigrationState *s = opaque;
|
2009-06-08 13:28:01 +02:00
|
|
|
|
2011-08-05 09:11:26 +02:00
|
|
|
if (s->mon) {
|
|
|
|
monitor_resume(s->mon);
|
|
|
|
}
|
2009-06-08 13:28:01 +02:00
|
|
|
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
|
2008-11-11 17:46:33 +01:00
|
|
|
return s->close(s);
|
|
|
|
}
|
2010-12-13 17:30:12 +01:00
|
|
|
|
|
|
|
void add_migration_state_change_notifier(Notifier *notify)
|
|
|
|
{
|
|
|
|
notifier_list_add(&migration_state_notifiers, notify);
|
|
|
|
}
|
|
|
|
|
|
|
|
void remove_migration_state_change_notifier(Notifier *notify)
|
|
|
|
{
|
|
|
|
notifier_list_remove(&migration_state_notifiers, notify);
|
|
|
|
}
|
|
|
|
|
2011-10-25 13:50:11 +02:00
|
|
|
bool migration_is_active(MigrationState *s)
|
|
|
|
{
|
|
|
|
return s->state == MIG_STATE_ACTIVE;
|
|
|
|
}
|
|
|
|
|
2011-02-23 00:43:59 +01:00
|
|
|
bool migration_has_finished(MigrationState *s)
|
2010-12-13 17:30:12 +01:00
|
|
|
{
|
2011-02-23 00:43:59 +01:00
|
|
|
return s->state == MIG_STATE_COMPLETED;
|
2010-12-13 17:30:12 +01:00
|
|
|
}
|
2010-05-11 16:28:39 +02:00
|
|
|
|
2011-10-25 13:50:11 +02:00
|
|
|
bool migration_has_failed(MigrationState *s)
|
|
|
|
{
|
|
|
|
return (s->state == MIG_STATE_CANCELLED ||
|
|
|
|
s->state == MIG_STATE_ERROR);
|
|
|
|
}
|
|
|
|
|
2011-09-11 20:28:22 +02:00
|
|
|
void migrate_fd_connect(MigrationState *s)
|
2010-12-13 17:30:12 +01:00
|
|
|
{
|
2011-09-11 20:28:22 +02:00
|
|
|
int ret;
|
|
|
|
|
2010-05-11 23:01:53 +02:00
|
|
|
s->state = MIG_STATE_ACTIVE;
|
2011-09-11 20:28:22 +02:00
|
|
|
s->file = qemu_fopen_ops_buffered(s,
|
|
|
|
s->bandwidth_limit,
|
|
|
|
migrate_fd_put_buffer,
|
|
|
|
migrate_fd_put_ready,
|
|
|
|
migrate_fd_wait_for_unfreeze,
|
|
|
|
migrate_fd_close);
|
|
|
|
|
|
|
|
DPRINTF("beginning savevm\n");
|
|
|
|
ret = qemu_savevm_state_begin(s->mon, s->file, s->blk, s->shared);
|
|
|
|
if (ret < 0) {
|
|
|
|
DPRINTF("failed, %d\n", ret);
|
|
|
|
migrate_fd_error(s);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
migrate_fd_put_ready(s);
|
|
|
|
}
|
|
|
|
|
2011-02-23 00:33:19 +01:00
|
|
|
static MigrationState *migrate_init(Monitor *mon, int detach, int blk, int inc)
|
2010-05-11 16:28:39 +02:00
|
|
|
{
|
2011-10-05 13:50:43 +02:00
|
|
|
MigrationState *s = migrate_get_current();
|
2011-02-23 00:33:19 +01:00
|
|
|
int64_t bandwidth_limit = s->bandwidth_limit;
|
2010-05-11 16:28:39 +02:00
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
memset(s, 0, sizeof(*s));
|
2011-02-23 00:33:19 +01:00
|
|
|
s->bandwidth_limit = bandwidth_limit;
|
2010-05-11 16:28:39 +02:00
|
|
|
s->blk = blk;
|
|
|
|
s->shared = inc;
|
2011-11-09 21:29:01 +01:00
|
|
|
|
|
|
|
/* s->mon is used for two things:
|
|
|
|
- pass fd in fd migration
|
|
|
|
- suspend/resume monitor for not detached migration
|
|
|
|
*/
|
|
|
|
s->mon = mon;
|
2010-05-11 16:28:39 +02:00
|
|
|
s->bandwidth_limit = bandwidth_limit;
|
2010-05-11 23:01:53 +02:00
|
|
|
s->state = MIG_STATE_SETUP;
|
2010-05-11 16:28:39 +02:00
|
|
|
|
|
|
|
if (!detach) {
|
|
|
|
migrate_fd_monitor_suspend(s, mon);
|
|
|
|
}
|
|
|
|
|
|
|
|
return s;
|
|
|
|
}
|
2011-02-22 23:54:21 +01:00
|
|
|
|
2011-11-14 22:09:43 +01:00
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2011-02-22 23:54:21 +01:00
|
|
|
int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
|
|
|
{
|
2011-10-05 13:50:43 +02:00
|
|
|
MigrationState *s = migrate_get_current();
|
2011-02-22 23:54:21 +01:00
|
|
|
const char *p;
|
|
|
|
int detach = qdict_get_try_bool(qdict, "detach", 0);
|
|
|
|
int blk = qdict_get_try_bool(qdict, "blk", 0);
|
|
|
|
int inc = qdict_get_try_bool(qdict, "inc", 0);
|
|
|
|
const char *uri = qdict_get_str(qdict, "uri");
|
|
|
|
int ret;
|
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
if (s->state == MIG_STATE_ACTIVE) {
|
2011-02-22 23:54:21 +01:00
|
|
|
monitor_printf(mon, "migration already in progress\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (qemu_savevm_state_blocked(mon)) {
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-11-14 22:09:43 +01:00
|
|
|
if (migration_blockers) {
|
|
|
|
Error *err = migration_blockers->data;
|
|
|
|
qerror_report_err(err);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2011-02-23 00:33:19 +01:00
|
|
|
s = migrate_init(mon, detach, blk, inc);
|
2011-02-22 23:54:21 +01:00
|
|
|
|
|
|
|
if (strstart(uri, "tcp:", &p)) {
|
|
|
|
ret = tcp_start_outgoing_migration(s, p);
|
|
|
|
#if !defined(WIN32)
|
|
|
|
} else if (strstart(uri, "exec:", &p)) {
|
|
|
|
ret = exec_start_outgoing_migration(s, p);
|
|
|
|
} else if (strstart(uri, "unix:", &p)) {
|
|
|
|
ret = unix_start_outgoing_migration(s, p);
|
|
|
|
} else if (strstart(uri, "fd:", &p)) {
|
|
|
|
ret = fd_start_outgoing_migration(s, p);
|
|
|
|
#endif
|
2010-12-13 17:30:12 +01:00
|
|
|
} else {
|
2011-02-22 23:54:21 +01:00
|
|
|
monitor_printf(mon, "unknown migration protocol: %s\n", uri);
|
|
|
|
ret = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ret < 0) {
|
2011-10-05 13:50:43 +02:00
|
|
|
monitor_printf(mon, "migration failed: %s\n", strerror(-ret));
|
|
|
|
return ret;
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2011-11-09 21:29:01 +01:00
|
|
|
if (detach) {
|
|
|
|
s->mon = NULL;
|
|
|
|
}
|
|
|
|
|
2011-10-05 14:27:52 +02:00
|
|
|
notifier_list_notify(&migration_state_notifiers, s);
|
2011-02-22 23:54:21 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-11-28 01:54:09 +01:00
|
|
|
void qmp_migrate_cancel(Error **errp)
|
2011-02-22 23:54:21 +01:00
|
|
|
{
|
2011-10-05 13:50:43 +02:00
|
|
|
migrate_fd_cancel(migrate_get_current());
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2011-11-28 14:59:37 +01:00
|
|
|
void qmp_migrate_set_speed(int64_t value, Error **errp)
|
2011-02-22 23:54:21 +01:00
|
|
|
{
|
|
|
|
MigrationState *s;
|
|
|
|
|
2011-11-28 14:59:37 +01:00
|
|
|
if (value < 0) {
|
|
|
|
value = 0;
|
2010-12-13 17:30:12 +01:00
|
|
|
}
|
2011-02-22 23:54:21 +01:00
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
s = migrate_get_current();
|
2011-11-28 14:59:37 +01:00
|
|
|
s->bandwidth_limit = value;
|
2011-02-23 00:33:19 +01:00
|
|
|
qemu_file_set_rate_limit(s->file, s->bandwidth_limit);
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2011-11-28 02:18:01 +01:00
|
|
|
void qmp_migrate_set_downtime(double value, Error **errp)
|
2011-02-22 23:54:21 +01:00
|
|
|
{
|
2011-11-28 02:18:01 +01:00
|
|
|
value *= 1e9;
|
|
|
|
value = MAX(0, MIN(UINT64_MAX, value));
|
|
|
|
max_downtime = (uint64_t)value;
|
2010-12-13 17:30:12 +01:00
|
|
|
}
|