mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-08-01 23:03:54 -06:00
Merge remote-tracking branch 'quintela/migration-pull' into staging
This commit is contained in:
Anthony Liguori
commit
a6e43daa73
13 changed files with 557 additions and 605 deletions
437
migration.c
437
migration.c
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|
@ -31,14 +31,33 @@
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do { } while (0)
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#endif
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/* Migration speed throttling */
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static int64_t max_throttle = (32 << 20);
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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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static MigrationState *current_migration;
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#define MAX_THROTTLE (32 << 20) /* Migration speed throttling */
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static NotifierList migration_state_notifiers =
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NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
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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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.bandwidth_limit = MAX_THROTTLE,
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};
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return ¤t_migration;
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}
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int qemu_start_incoming_migration(const char *uri)
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{
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const char *p;
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@ -77,87 +96,6 @@ void process_incoming_migration(QEMUFile *f)
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}
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}
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int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
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{
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MigrationState *s = NULL;
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const char *p;
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int detach = qdict_get_try_bool(qdict, "detach", 0);
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int blk = qdict_get_try_bool(qdict, "blk", 0);
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int inc = qdict_get_try_bool(qdict, "inc", 0);
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const char *uri = qdict_get_str(qdict, "uri");
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if (current_migration &&
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current_migration->get_status(current_migration) == MIG_STATE_ACTIVE) {
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monitor_printf(mon, "migration already in progress\n");
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return -1;
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}
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if (qemu_savevm_state_blocked(mon)) {
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return -1;
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}
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if (strstart(uri, "tcp:", &p)) {
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s = tcp_start_outgoing_migration(mon, p, max_throttle, detach,
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blk, inc);
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#if !defined(WIN32)
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} else if (strstart(uri, "exec:", &p)) {
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s = exec_start_outgoing_migration(mon, p, max_throttle, detach,
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blk, inc);
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} else if (strstart(uri, "unix:", &p)) {
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s = unix_start_outgoing_migration(mon, p, max_throttle, detach,
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blk, inc);
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} else if (strstart(uri, "fd:", &p)) {
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s = fd_start_outgoing_migration(mon, p, max_throttle, detach,
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blk, inc);
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#endif
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} else {
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monitor_printf(mon, "unknown migration protocol: %s\n", uri);
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return -1;
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}
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if (s == NULL) {
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monitor_printf(mon, "migration failed\n");
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return -1;
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}
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if (current_migration) {
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current_migration->release(current_migration);
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}
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current_migration = s;
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notifier_list_notify(&migration_state_notifiers, NULL);
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return 0;
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}
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int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data)
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{
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MigrationState *s = current_migration;
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if (s)
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s->cancel(s);
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return 0;
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}
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int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data)
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{
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int64_t d;
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FdMigrationState *s;
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d = qdict_get_int(qdict, "value");
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if (d < 0) {
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d = 0;
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}
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max_throttle = d;
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s = migrate_to_fms(current_migration);
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if (s && s->file) {
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qemu_file_set_rate_limit(s->file, max_throttle);
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}
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return 0;
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}
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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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@ -169,18 +107,6 @@ uint64_t migrate_max_downtime(void)
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return max_downtime;
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}
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int do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
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QObject **ret_data)
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{
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double d;
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d = qdict_get_double(qdict, "value") * 1e9;
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d = MAX(0, MIN(UINT64_MAX, d));
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max_downtime = (uint64_t)d;
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return 0;
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}
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static void migrate_print_status(Monitor *mon, const char *name,
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const QDict *status_dict)
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{
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@ -228,41 +154,42 @@ static void migrate_put_status(QDict *qdict, const char *name,
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void do_info_migrate(Monitor *mon, QObject **ret_data)
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{
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QDict *qdict;
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MigrationState *s = current_migration;
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MigrationState *s = migrate_get_current();
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if (s) {
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switch (s->get_status(s)) {
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case MIG_STATE_ACTIVE:
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qdict = qdict_new();
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qdict_put(qdict, "status", qstring_from_str("active"));
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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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qdict = qdict_new();
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qdict_put(qdict, "status", qstring_from_str("active"));
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migrate_put_status(qdict, "ram", ram_bytes_transferred(),
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ram_bytes_remaining(), ram_bytes_total());
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migrate_put_status(qdict, "ram", ram_bytes_transferred(),
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ram_bytes_remaining(), ram_bytes_total());
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if (blk_mig_active()) {
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migrate_put_status(qdict, "disk", blk_mig_bytes_transferred(),
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blk_mig_bytes_remaining(),
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blk_mig_bytes_total());
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}
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*ret_data = QOBJECT(qdict);
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break;
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case MIG_STATE_COMPLETED:
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*ret_data = qobject_from_jsonf("{ 'status': 'completed' }");
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break;
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case MIG_STATE_ERROR:
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*ret_data = qobject_from_jsonf("{ 'status': 'failed' }");
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break;
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case MIG_STATE_CANCELLED:
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*ret_data = qobject_from_jsonf("{ 'status': 'cancelled' }");
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break;
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if (blk_mig_active()) {
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migrate_put_status(qdict, "disk", blk_mig_bytes_transferred(),
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blk_mig_bytes_remaining(),
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blk_mig_bytes_total());
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}
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*ret_data = QOBJECT(qdict);
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break;
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case MIG_STATE_COMPLETED:
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*ret_data = qobject_from_jsonf("{ 'status': 'completed' }");
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break;
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case MIG_STATE_ERROR:
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*ret_data = qobject_from_jsonf("{ 'status': 'failed' }");
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break;
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case MIG_STATE_CANCELLED:
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*ret_data = qobject_from_jsonf("{ 'status': 'cancelled' }");
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break;
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}
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}
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/* shared migration helpers */
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void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon)
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static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
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{
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s->mon = mon;
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if (monitor_suspend(mon) == 0) {
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@ -273,15 +200,7 @@ void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon)
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}
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}
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void migrate_fd_error(FdMigrationState *s)
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{
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DPRINTF("setting error state\n");
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s->state = MIG_STATE_ERROR;
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notifier_list_notify(&migration_state_notifiers, NULL);
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migrate_fd_cleanup(s);
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}
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int migrate_fd_cleanup(FdMigrationState *s)
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static int migrate_fd_cleanup(MigrationState *s)
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{
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int ret = 0;
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@ -307,19 +226,47 @@ int migrate_fd_cleanup(FdMigrationState *s)
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return ret;
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}
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void migrate_fd_put_notify(void *opaque)
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void migrate_fd_error(MigrationState *s)
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{
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FdMigrationState *s = opaque;
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DPRINTF("setting error state\n");
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s->state = MIG_STATE_ERROR;
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notifier_list_notify(&migration_state_notifiers, s);
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migrate_fd_cleanup(s);
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}
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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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notifier_list_notify(&migration_state_notifiers, s);
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}
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static void migrate_fd_put_notify(void *opaque)
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{
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MigrationState *s = opaque;
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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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if (qemu_file_get_error(s->file)) {
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migrate_fd_error(s);
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}
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}
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ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size)
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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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{
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FdMigrationState *s = opaque;
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MigrationState *s = opaque;
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ssize_t ret;
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|
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if (s->state != MIG_STATE_ACTIVE) {
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return -EIO;
|
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}
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do {
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ret = s->write(s, data, size);
|
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} while (ret == -1 && ((s->get_error(s)) == EINTR));
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|
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@ -329,115 +276,61 @@ ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size)
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|
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if (ret == -EAGAIN) {
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qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s);
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} else if (ret < 0) {
|
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s->state = MIG_STATE_ERROR;
|
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notifier_list_notify(&migration_state_notifiers, NULL);
|
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}
|
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|
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return ret;
|
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}
|
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|
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void migrate_fd_connect(FdMigrationState *s)
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static void migrate_fd_put_ready(void *opaque)
|
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{
|
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MigrationState *s = opaque;
|
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int ret;
|
||||
|
||||
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->mig_state.blk,
|
||||
s->mig_state.shared);
|
||||
if (ret < 0) {
|
||||
DPRINTF("failed, %d\n", ret);
|
||||
migrate_fd_error(s);
|
||||
return;
|
||||
}
|
||||
|
||||
migrate_fd_put_ready(s);
|
||||
}
|
||||
|
||||
void migrate_fd_put_ready(void *opaque)
|
||||
{
|
||||
FdMigrationState *s = opaque;
|
||||
|
||||
if (s->state != MIG_STATE_ACTIVE) {
|
||||
DPRINTF("put_ready returning because of non-active state\n");
|
||||
return;
|
||||
}
|
||||
|
||||
DPRINTF("iterate\n");
|
||||
if (qemu_savevm_state_iterate(s->mon, s->file) == 1) {
|
||||
int state;
|
||||
ret = qemu_savevm_state_iterate(s->mon, 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_force_state(RUN_STATE_FINISH_MIGRATE);
|
||||
|
||||
if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) {
|
||||
if (old_vm_running) {
|
||||
vm_start();
|
||||
}
|
||||
state = MIG_STATE_ERROR;
|
||||
if (qemu_savevm_state_complete(s->mon, s->file) < 0) {
|
||||
migrate_fd_error(s);
|
||||
} else {
|
||||
state = MIG_STATE_COMPLETED;
|
||||
migrate_fd_completed(s);
|
||||
}
|
||||
if (migrate_fd_cleanup(s) < 0) {
|
||||
if (s->state != MIG_STATE_COMPLETED) {
|
||||
if (old_vm_running) {
|
||||
vm_start();
|
||||
}
|
||||
state = MIG_STATE_ERROR;
|
||||
}
|
||||
if (state == MIG_STATE_COMPLETED) {
|
||||
runstate_set(RUN_STATE_POSTMIGRATE);
|
||||
}
|
||||
s->state = state;
|
||||
notifier_list_notify(&migration_state_notifiers, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
int migrate_fd_get_status(MigrationState *mig_state)
|
||||
static void migrate_fd_cancel(MigrationState *s)
|
||||
{
|
||||
FdMigrationState *s = migrate_to_fms(mig_state);
|
||||
return s->state;
|
||||
}
|
||||
|
||||
void migrate_fd_cancel(MigrationState *mig_state)
|
||||
{
|
||||
FdMigrationState *s = migrate_to_fms(mig_state);
|
||||
|
||||
if (s->state != MIG_STATE_ACTIVE)
|
||||
return;
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
void migrate_fd_release(MigrationState *mig_state)
|
||||
static void migrate_fd_wait_for_unfreeze(void *opaque)
|
||||
{
|
||||
FdMigrationState *s = migrate_to_fms(mig_state);
|
||||
|
||||
DPRINTF("releasing state\n");
|
||||
|
||||
if (s->state == MIG_STATE_ACTIVE) {
|
||||
s->state = MIG_STATE_CANCELLED;
|
||||
notifier_list_notify(&migration_state_notifiers, NULL);
|
||||
migrate_fd_cleanup(s);
|
||||
}
|
||||
g_free(s);
|
||||
}
|
||||
|
||||
void migrate_fd_wait_for_unfreeze(void *opaque)
|
||||
{
|
||||
FdMigrationState *s = opaque;
|
||||
MigrationState *s = opaque;
|
||||
int ret;
|
||||
|
||||
DPRINTF("wait for unfreeze\n");
|
||||
|
|
@ -452,11 +345,15 @@ void migrate_fd_wait_for_unfreeze(void *opaque)
|
|||
|
||||
ret = select(s->fd + 1, NULL, &wfds, NULL, NULL);
|
||||
} while (ret == -1 && (s->get_error(s)) == EINTR);
|
||||
|
||||
if (ret == -1) {
|
||||
qemu_file_set_error(s->file, -s->get_error(s));
|
||||
}
|
||||
}
|
||||
|
||||
int migrate_fd_close(void *opaque)
|
||||
static int migrate_fd_close(void *opaque)
|
||||
{
|
||||
FdMigrationState *s = opaque;
|
||||
MigrationState *s = opaque;
|
||||
|
||||
if (s->mon) {
|
||||
monitor_resume(s->mon);
|
||||
|
|
@ -475,11 +372,129 @@ void remove_migration_state_change_notifier(Notifier *notify)
|
|||
notifier_list_remove(&migration_state_notifiers, notify);
|
||||
}
|
||||
|
||||
int get_migration_state(void)
|
||||
bool migration_has_finished(MigrationState *s)
|
||||
{
|
||||
if (current_migration) {
|
||||
return migrate_fd_get_status(current_migration);
|
||||
} else {
|
||||
return MIG_STATE_ERROR;
|
||||
}
|
||||
return s->state == MIG_STATE_COMPLETED;
|
||||
}
|
||||
|
||||
void migrate_fd_connect(MigrationState *s)
|
||||
{
|
||||
int ret;
|
||||
|
||||
s->state = MIG_STATE_ACTIVE;
|
||||
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);
|
||||
}
|
||||
|
||||
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->bandwidth_limit = bandwidth_limit;
|
||||
s->state = MIG_STATE_SETUP;
|
||||
|
||||
if (!detach) {
|
||||
migrate_fd_monitor_suspend(s, mon);
|
||||
}
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
||||
{
|
||||
MigrationState *s = migrate_get_current();
|
||||
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;
|
||||
|
||||
if (s->state == MIG_STATE_ACTIVE) {
|
||||
monitor_printf(mon, "migration already in progress\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (qemu_savevm_state_blocked(mon)) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
s = migrate_init(mon, detach, blk, inc);
|
||||
|
||||
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
|
||||
} else {
|
||||
monitor_printf(mon, "unknown migration protocol: %s\n", uri);
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
if (ret < 0) {
|
||||
monitor_printf(mon, "migration failed: %s\n", strerror(-ret));
|
||||
return ret;
|
||||
}
|
||||
|
||||
notifier_list_notify(&migration_state_notifiers, s);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
||||
{
|
||||
migrate_fd_cancel(migrate_get_current());
|
||||
return 0;
|
||||
}
|
||||
|
||||
int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
||||
{
|
||||
int64_t d;
|
||||
MigrationState *s;
|
||||
|
||||
d = qdict_get_int(qdict, "value");
|
||||
if (d < 0) {
|
||||
d = 0;
|
||||
}
|
||||
|
||||
s = migrate_get_current();
|
||||
s->bandwidth_limit = d;
|
||||
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)
|
||||
{
|
||||
double d;
|
||||
|
||||
d = qdict_get_double(qdict, "value") * 1e9;
|
||||
d = MAX(0, MIN(UINT64_MAX, d));
|
||||
max_downtime = (uint64_t)d;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue