diff options
Diffstat (limited to 'migration/migration.c')
| -rw-r--r-- | migration/migration.c | 116 |
1 files changed, 81 insertions, 35 deletions
diff --git a/migration/migration.c b/migration/migration.c index e1ac4d73c2..a63b46bbef 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -74,11 +74,7 @@ #define INMIGRATE_DEFAULT_EXIT_ON_ERROR true -static NotifierWithReturnList migration_state_notifiers[] = { - NOTIFIER_ELEM_INIT(migration_state_notifiers, MIG_MODE_NORMAL), - NOTIFIER_ELEM_INIT(migration_state_notifiers, MIG_MODE_CPR_REBOOT), - NOTIFIER_ELEM_INIT(migration_state_notifiers, MIG_MODE_CPR_TRANSFER), -}; +static GSList *migration_state_notifiers[MIG_MODE__MAX]; /* Messages sent on the return path from destination to source */ enum mig_rp_message_type { @@ -337,6 +333,7 @@ void migration_object_init(void) ram_mig_init(); dirty_bitmap_mig_init(); + cpr_exec_init(); /* Initialize cpu throttle timers */ cpu_throttle_init(); @@ -623,22 +620,22 @@ void migration_incoming_disable_colo(void) migration_colo_enabled = false; } -int migration_incoming_enable_colo(void) +int migration_incoming_enable_colo(Error **errp) { #ifndef CONFIG_REPLICATION - error_report("ENABLE_COLO command come in migration stream, but the " - "replication module is not built in"); + error_setg(errp, "ENABLE_COLO command come in migration stream, but the " + "replication module is not built in"); return -ENOTSUP; #endif if (!migrate_colo()) { - error_report("ENABLE_COLO command come in migration stream, but x-colo " - "capability is not set"); + error_setg(errp, "ENABLE_COLO command come in migration stream" + ", but x-colo capability is not set"); return -EINVAL; } if (ram_block_discard_disable(true)) { - error_report("COLO: cannot disable RAM discard"); + error_setg(errp, "COLO: cannot disable RAM discard"); return -EBUSY; } migration_colo_enabled = true; @@ -881,7 +878,7 @@ process_incoming_migration_co(void *opaque) MIGRATION_STATUS_ACTIVE); mis->loadvm_co = qemu_coroutine_self(); - ret = qemu_loadvm_state(mis->from_src_file); + ret = qemu_loadvm_state(mis->from_src_file, &local_err); mis->loadvm_co = NULL; trace_vmstate_downtime_checkpoint("dst-precopy-loadvm-completed"); @@ -908,7 +905,8 @@ process_incoming_migration_co(void *opaque) } if (ret < 0) { - error_setg(&local_err, "load of migration failed: %s", strerror(-ret)); + error_prepend(&local_err, "load of migration failed: %s: ", + strerror(-ret)); goto fail; } @@ -935,6 +933,15 @@ fail: } exit(EXIT_FAILURE); + } else { + /* + * Report the error here in case that QEMU abruptly exits + * when postcopy is enabled. + */ + WITH_QEMU_LOCK_GUARD(&s->error_mutex) { + error_report_err(s->error); + s->error = NULL; + } } out: /* Pairs with the refcount taken in qmp_migrate_incoming() */ @@ -1665,23 +1672,51 @@ void migration_cancel(void) } } +static int get_modes(MigMode mode, va_list ap); + +static void add_notifiers(NotifierWithReturn *notify, int modes) +{ + for (MigMode mode = 0; mode < MIG_MODE__MAX; mode++) { + if (modes & BIT(mode)) { + migration_state_notifiers[mode] = + g_slist_prepend(migration_state_notifiers[mode], notify); + } + } +} + +void migration_add_notifier_modes(NotifierWithReturn *notify, + MigrationNotifyFunc func, MigMode mode, ...) +{ + int modes; + va_list ap; + + va_start(ap, mode); + modes = get_modes(mode, ap); + va_end(ap); + + notify->notify = (NotifierWithReturnFunc)func; + add_notifiers(notify, modes); +} + void migration_add_notifier_mode(NotifierWithReturn *notify, MigrationNotifyFunc func, MigMode mode) { - notify->notify = (NotifierWithReturnFunc)func; - notifier_with_return_list_add(&migration_state_notifiers[mode], notify); + migration_add_notifier_modes(notify, func, mode, -1); } void migration_add_notifier(NotifierWithReturn *notify, MigrationNotifyFunc func) { - migration_add_notifier_mode(notify, func, MIG_MODE_NORMAL); + migration_add_notifier_modes(notify, func, MIG_MODE_NORMAL, -1); } void migration_remove_notifier(NotifierWithReturn *notify) { if (notify->notify) { - notifier_with_return_remove(notify); + for (MigMode mode = 0; mode < MIG_MODE__MAX; mode++) { + migration_blockers[mode] = + g_slist_remove(migration_state_notifiers[mode], notify); + } notify->notify = NULL; } } @@ -1691,18 +1726,29 @@ int migration_call_notifiers(MigrationState *s, MigrationEventType type, { MigMode mode = s->parameters.mode; MigrationEvent e; + NotifierWithReturn *notifier; + GSList *elem, *next; int ret; e.type = type; - ret = notifier_with_return_list_notify(&migration_state_notifiers[mode], - &e, errp); - assert(!ret || type == MIG_EVENT_PRECOPY_SETUP); - return ret; + + for (elem = migration_state_notifiers[mode]; elem; elem = next) { + next = elem->next; + notifier = (NotifierWithReturn *)elem->data; + ret = notifier->notify(notifier, &e, errp); + if (ret) { + assert(type == MIG_EVENT_PRECOPY_SETUP); + return ret; + } + } + + return 0; } bool migration_has_failed(MigrationState *s) { - return (s->state == MIGRATION_STATUS_CANCELLED || + return (s->state == MIGRATION_STATUS_CANCELLING || + s->state == MIGRATION_STATUS_CANCELLED || s->state == MIGRATION_STATUS_FAILED); } @@ -1762,7 +1808,8 @@ bool migrate_mode_is_cpr(MigrationState *s) { MigMode mode = s->parameters.mode; return mode == MIG_MODE_CPR_REBOOT || - mode == MIG_MODE_CPR_TRANSFER; + mode == MIG_MODE_CPR_TRANSFER || + mode == MIG_MODE_CPR_EXEC; } int migrate_init(MigrationState *s, Error **errp) @@ -2111,6 +2158,12 @@ static bool migrate_prepare(MigrationState *s, bool resume, Error **errp) return false; } + if (migrate_mode() == MIG_MODE_CPR_EXEC && + !s->parameters.has_cpr_exec_command) { + error_setg(errp, "cpr-exec mode requires setting cpr-exec-command"); + return false; + } + if (migration_is_blocked(errp)) { return false; } @@ -2646,12 +2699,9 @@ out: return NULL; } -static int open_return_path_on_source(MigrationState *ms) +static void open_return_path_on_source(MigrationState *ms) { ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); - if (!ms->rp_state.from_dst_file) { - return -1; - } trace_open_return_path_on_source(); @@ -2660,8 +2710,6 @@ static int open_return_path_on_source(MigrationState *ms) ms->rp_state.rp_thread_created = true; trace_open_return_path_on_source_continue(); - - return 0; } /* Return true if error detected, or false otherwise */ @@ -2872,8 +2920,9 @@ static int postcopy_start(MigrationState *ms, Error **errp) fail_closefb: qemu_fclose(fb); fail: - migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, - MIGRATION_STATUS_FAILED); + if (ms->state != MIGRATION_STATUS_CANCELLING) { + migrate_set_state(&ms->state, ms->state, MIGRATION_STATUS_FAILED); + } migration_block_activate(NULL); migration_call_notifiers(ms, MIG_EVENT_PRECOPY_FAILED, NULL); bql_unlock(); @@ -4012,10 +4061,7 @@ void migration_connect(MigrationState *s, Error *error_in) * QEMU uses the return path. */ if (migrate_postcopy_ram() || migrate_return_path()) { - if (open_return_path_on_source(s)) { - error_setg(&local_err, "Unable to open return-path for postcopy"); - goto fail; - } + open_return_path_on_source(s); } /* |