Example #1
0
static void migrate_fd_put_ready(void *opaque)
{
    MigrationState *s = opaque;
    int ret;

    if (s->state != MIG_STATE_ACTIVE) {
        DPRINTF("put_ready returning because of non-active state\n");
        return;
    }

    DPRINTF("iterate\n");
    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) {
            migrate_fd_error(s);
        } else {
            migrate_fd_completed(s);
        }
        if (s->state != MIG_STATE_COMPLETED) {
            if (old_vm_running) {
                vm_start();
            }
        }
    }
}
Example #2
0
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->file) == 1) {
        int state;
        dprintf("done iterating\n");
        vm_stop(0);

        bdrv_flush_all();
        if ((qemu_savevm_state_complete(s->file)) < 0) {
            vm_start();
            state = MIG_STATE_ERROR;
        } else {
            state = MIG_STATE_COMPLETED;
        }
        migrate_fd_cleanup(s);
        s->state = state;
    }
}
Example #3
0
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;
        int old_vm_running = vm_running;

        DPRINTF("done iterating\n");
        vm_stop(VMSTOP_MIGRATE);

        if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) {
            if (old_vm_running) {
                vm_start();
            }
            state = MIG_STATE_ERROR;
        } else {
            state = MIG_STATE_COMPLETED;
        }
        if (migrate_fd_cleanup(s) < 0) {
            if (old_vm_running) {
                vm_start();
            }
            state = MIG_STATE_ERROR;
        }
        s->state = state;
        notifier_list_notify(&migration_state_notifiers);
    }
}
Example #4
0
void migrate_fd_put_ready(MigrationState *s)
{
    int ret;

    if (s->state != MIG_STATE_ACTIVE) {
        DPRINTF("put_ready returning because of non-active state\n");
        return;
    }

    DPRINTF("iterate\n");
    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();
        int64_t start_time, end_time;

        DPRINTF("done iterating\n");
        start_time = qemu_get_clock_ms(rt_clock);
        qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
        vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);

        if (qemu_savevm_state_complete(s->file) < 0) {
            migrate_fd_error(s);
        } else {
            migrate_fd_completed(s);
        }
        end_time = qemu_get_clock_ms(rt_clock);
        s->total_time = end_time - s->total_time;
        s->downtime = end_time - start_time;
        if (s->state != MIG_STATE_COMPLETED) {
            if (old_vm_running) {
                vm_start();
            }
        }
    }
}
Example #5
0
static void *buffered_file_thread(void *opaque)
{
    MigrationState *s = opaque;
    int64_t initial_time = qemu_get_clock_ms(rt_clock);
    int64_t max_size = 0;
    bool last_round = false;
    int ret;

    qemu_mutex_lock_iothread();
    DPRINTF("beginning savevm\n");
    ret = qemu_savevm_state_begin(s->file, &s->params);
    if (ret < 0) {
        DPRINTF("failed, %d\n", ret);
        qemu_mutex_unlock_iothread();
        goto out;
    }
    qemu_mutex_unlock_iothread();

    while (true) {
        int64_t current_time = qemu_get_clock_ms(rt_clock);
        uint64_t pending_size;

        qemu_mutex_lock_iothread();
        if (s->state != MIG_STATE_ACTIVE) {
            DPRINTF("put_ready returning because of non-active state\n");
            qemu_mutex_unlock_iothread();
            break;
        }
        if (s->complete) {
            qemu_mutex_unlock_iothread();
            break;
        }
        if (s->bytes_xfer < s->xfer_limit) {
            DPRINTF("iterate\n");
            pending_size = qemu_savevm_state_pending(s->file, max_size);
            DPRINTF("pending size %lu max %lu\n", pending_size, max_size);
            if (pending_size && pending_size >= max_size) {
                ret = qemu_savevm_state_iterate(s->file);
                if (ret < 0) {
                    qemu_mutex_unlock_iothread();
                    break;
                }
            } else {
                int old_vm_running = runstate_is_running();
                int64_t start_time, end_time;

                DPRINTF("done iterating\n");
                start_time = qemu_get_clock_ms(rt_clock);
                qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
                if (old_vm_running) {
                    vm_stop(RUN_STATE_FINISH_MIGRATE);
                } else {
                    vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
                }
                ret = qemu_savevm_state_complete(s->file);
                if (ret < 0) {
                    qemu_mutex_unlock_iothread();
                    break;
                } else {
                    migrate_fd_completed(s);
                }
                end_time = qemu_get_clock_ms(rt_clock);
                s->total_time = end_time - s->total_time;
                s->downtime = end_time - start_time;
                if (s->state != MIG_STATE_COMPLETED) {
                    if (old_vm_running) {
                        vm_start();
                    }
                }
                last_round = true;
            }
        }
        qemu_mutex_unlock_iothread();
        if (current_time >= initial_time + BUFFER_DELAY) {
            uint64_t transferred_bytes = s->bytes_xfer;
            uint64_t time_spent = current_time - initial_time;
            double bandwidth = transferred_bytes / time_spent;
            max_size = bandwidth * migrate_max_downtime() / 1000000;

            DPRINTF("transferred %" PRIu64 " time_spent %" PRIu64
                    " bandwidth %g max_size %" PRId64 "\n",
                    transferred_bytes, time_spent, bandwidth, max_size);

            s->bytes_xfer = 0;
            initial_time = current_time;
        }
        if (!last_round && (s->bytes_xfer >= s->xfer_limit)) {
            /* usleep expects microseconds */
            g_usleep((initial_time + BUFFER_DELAY - current_time)*1000);
        }
        ret = buffered_flush(s);
        if (ret < 0) {
            break;
        }
    }

out:
    if (ret < 0) {
        migrate_fd_error(s);
    }
    g_free(s->buffer);
    return NULL;
}
Example #6
0
static int migrate_ft_trans_put_ready(void)
{
    FdMigrationState *s = migrate_to_fms(current_migration);
    int ret = -1, init = 0, timeout;
    static int64_t start, now;

    switch (ft_mode) {
    case FT_INIT:
        init = 1;
        ft_mode = FT_TRANSACTION_BEGIN;
    case FT_TRANSACTION_BEGIN:
        now = start = qemu_get_clock_ns(vm_clock);
        /* start transatcion at best effort */
        qemu_file_set_rate_limit(s->file, 1);

        if (qemu_ft_trans_begin(s->file) < 0) {
            fprintf(stderr, "qemu_transaction_begin failed\n");
            goto error_out;
        }

        vm_stop(0);

        ret = qemu_savevm_trans_begin(s->mon, s->file, init);
        if (ret < 0) {
            fprintf(stderr, "qemu_savevm_trans_begin\n");
            goto error_out;
        }

        if (ret) {
            ft_mode = FT_TRANSACTION_ITER;
            vm_start();
        } else {
            ft_mode = FT_TRANSACTION_COMMIT;
            if (migrate_ft_trans_commit(s) < 0) {
                goto error_out;
            }
        }
        break;

    case FT_TRANSACTION_ITER:
        now = qemu_get_clock_ns(vm_clock);
        timeout = ((now - start) >= max_downtime);
        if (timeout || qemu_savevm_state_iterate(s->mon, s->file) == 1) {
            DPRINTF("ft trans iter timeout %d\n", timeout);

            ft_mode = FT_TRANSACTION_COMMIT;
            if (migrate_ft_trans_commit(s) < 0) {
                goto error_out;
            }
            return 1;
        }

        ft_mode = FT_TRANSACTION_ITER;
        break;

    case FT_TRANSACTION_ATOMIC:
    case FT_TRANSACTION_COMMIT:
        if (migrate_ft_trans_commit(s) < 0) {
            goto error_out;
        }
        break;

    default:
        fprintf(stderr,
                "migrate_ft_trans_put_ready: invalid ft_mode %d", ft_mode);
        goto error_out;
    }

    ret = 0;
    goto out;

error_out:
    migrate_ft_trans_error(s);

out:
    return ret;
}
Example #7
0
static void *migration_thread(void *opaque)
{
    MigrationState *s = opaque;
    int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
    int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST);
    int64_t initial_bytes = 0;
    int64_t max_size = 0;
    int64_t start_time = initial_time;
    bool old_vm_running = false;

    DPRINTF("beginning savevm\n");
    qemu_savevm_state_begin(s->file, &s->params);

    s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start;
    migrate_set_state(s, MIG_STATE_SETUP, MIG_STATE_ACTIVE);

    DPRINTF("setup complete\n");

    while (s->state == MIG_STATE_ACTIVE) {
        int64_t current_time;
        uint64_t pending_size;

        if (!qemu_file_rate_limit(s->file)) {
            DPRINTF("iterate\n");
            pending_size = qemu_savevm_state_pending(s->file, max_size);
            DPRINTF("pending size %" PRIu64 " max %" PRIu64 "\n",
                    pending_size, max_size);
            if (pending_size && pending_size >= max_size) {
                qemu_savevm_state_iterate(s->file);
            } else {
                int ret;

                DPRINTF("done iterating\n");
                qemu_mutex_lock_iothread();
                start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
                qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
                old_vm_running = runstate_is_running();

                ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
                if (ret >= 0) {
                    qemu_file_set_rate_limit(s->file, INT64_MAX);
                    qemu_savevm_state_complete(s->file);
                }
                qemu_mutex_unlock_iothread();

                if (ret < 0) {
                    migrate_set_state(s, MIG_STATE_ACTIVE, MIG_STATE_ERROR);
                    break;
                }

                if (!qemu_file_get_error(s->file)) {
                    migrate_set_state(s, MIG_STATE_ACTIVE, MIG_STATE_COMPLETED);
                    break;
                }
            }
        }

        if (qemu_file_get_error(s->file)) {
            migrate_set_state(s, MIG_STATE_ACTIVE, MIG_STATE_ERROR);
            break;
        }
        current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
        if (current_time >= initial_time + BUFFER_DELAY) {
            uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes;
            uint64_t time_spent = current_time - initial_time;
            double bandwidth = transferred_bytes / time_spent;
            max_size = bandwidth * migrate_max_downtime() / 1000000;

            s->mbps = time_spent ? (((double) transferred_bytes * 8.0) /
                    ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1;

            DPRINTF("transferred %" PRIu64 " time_spent %" PRIu64
                    " bandwidth %g max_size %" PRId64 "\n",
                    transferred_bytes, time_spent, bandwidth, max_size);
            /* if we haven't sent anything, we don't want to recalculate
               10000 is a small enough number for our purposes */
            if (s->dirty_bytes_rate && transferred_bytes > 10000) {
                s->expected_downtime = s->dirty_bytes_rate / bandwidth;
            }

            qemu_file_reset_rate_limit(s->file);
            initial_time = current_time;
            initial_bytes = qemu_ftell(s->file);
        }
        if (qemu_file_rate_limit(s->file)) {
            /* usleep expects microseconds */
            g_usleep((initial_time + BUFFER_DELAY - current_time)*1000);
        }
    }

    qemu_mutex_lock_iothread();
    if (s->state == MIG_STATE_COMPLETED) {
        int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
        s->total_time = end_time - s->total_time;
        s->downtime = end_time - start_time;
        runstate_set(RUN_STATE_POSTMIGRATE);
    } else {
        if (old_vm_running) {
            vm_start();
        }
    }
    qemu_bh_schedule(s->cleanup_bh);
    qemu_mutex_unlock_iothread();

    return NULL;
}