static void tcp_wait_for_connect(void *opaque)
{
    FdMigrationState *s = opaque;
    int val, ret;
    socklen_t valsize = sizeof(val);

    dprintf("connect completed\n");
    do {
        ret = getsockopt(s->fd, SOL_SOCKET, SO_ERROR, (char *)&val, &valsize);
    } while (ret == -1 && (s->get_error(s)) == EINTR);

    if (ret < 0) {
        migrate_fd_error(s);
        return;
    }

    qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);

    if (val == 0)
        migrate_fd_connect(s);
    else {
        dprintf("error connecting %d\n", val);
        migrate_fd_error(s);
    }
}
Exemplo n.º 2
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();
            }
        }
    }
}
Exemplo n.º 3
0
void qmp_migrate(const char *uri, bool has_blk, bool blk,
                 bool has_inc, bool inc, bool has_detach, bool detach,
                 Error **errp)
{
    Error *local_err = NULL;
    MigrationState *s = migrate_get_current();
    MigrationParams params;
    const char *p;

    params.blk = has_blk && blk;
    params.shared = has_inc && inc;

    if (s->state == MIG_STATE_ACTIVE || s->state == MIG_STATE_SETUP ||
        s->state == MIG_STATE_CANCELLING) {
        error_set(errp, QERR_MIGRATION_ACTIVE);
        return;
    }

    if (runstate_check(RUN_STATE_INMIGRATE)) {
        error_setg(errp, "Guest is waiting for an incoming migration");
        return;
    }

    if (qemu_savevm_state_blocked(errp)) {
        return;
    }

    if (migration_blockers) {
        *errp = error_copy(migration_blockers->data);
        return;
    }

    s = migrate_init(&params);

    if (strstart(uri, "tcp:", &p)) {
        tcp_start_outgoing_migration(s, p, &local_err);
#ifdef CONFIG_RDMA
    } else if (strstart(uri, "rdma:", &p)) {
        rdma_start_outgoing_migration(s, p, &local_err);
#endif
#if !defined(WIN32)
    } else if (strstart(uri, "exec:", &p)) {
        exec_start_outgoing_migration(s, p, &local_err);
    } else if (strstart(uri, "unix:", &p)) {
        unix_start_outgoing_migration(s, p, &local_err);
    } else if (strstart(uri, "fd:", &p)) {
        fd_start_outgoing_migration(s, p, &local_err);
#endif
    } else {
        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol");
        s->state = MIG_STATE_ERROR;
        return;
    }

    if (local_err) {
        migrate_fd_error(s);
        error_propagate(errp, local_err);
        return;
    }
}
Exemplo n.º 4
0
static void migrate_fd_put_notify(void *opaque)
{
    MigrationState *s = opaque;

    qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
    qemu_file_put_notify(s->file);
    if (s->file && qemu_file_get_error(s->file)) {
        migrate_fd_error(s);
    }
}
Exemplo n.º 5
0
static void migrate_ft_trans_error(FdMigrationState *s)
{
    ft_mode = FT_ERROR;
    qemu_savevm_state_cancel(s->mon, s->file);
    migrate_fd_error(s);
    /* we need to set vm running to avoid assert in virtio-net */
    vm_start();
    event_tap_unregister();
    vm_stop(0);
}
Exemplo n.º 6
0
static void migrate_fd_put_notify(void *opaque)
{
    MigrationState *s = opaque;
    int ret;

    qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
    ret = qemu_file_put_notify(s->file);
    if (ret) {
        migrate_fd_error(s);
    }
}
Exemplo n.º 7
0
void qmp_migrate(const char *uri, bool has_blk, bool blk,
                 bool has_inc, bool inc, bool has_detach, bool detach,
                 Error **errp)
{
    Error *local_err = NULL;
    MigrationState *s = migrate_get_current();
    MigrationParams params;
    const char *p;

    params.blk = blk;
    params.shared = inc;

    if (s->state == MIG_STATE_ACTIVE) {
        error_set(errp, QERR_MIGRATION_ACTIVE);
        return;
    }

    if (qemu_savevm_state_blocked(errp)) {
        return;
    }

    if (migration_blockers) {
        *errp = error_copy(migration_blockers->data);
        return;
    }

    s = migrate_init(&params);

    if (strstart(uri, "tcp:", &p)) {
        tcp_start_outgoing_migration(s, p, &local_err);
#if !defined(WIN32)
    } else if (strstart(uri, "exec:", &p)) {
        exec_start_outgoing_migration(s, p, &local_err);
    } else if (strstart(uri, "unix:", &p)) {
        unix_start_outgoing_migration(s, p, &local_err);
    } else if (strstart(uri, "fd:", &p)) {
        fd_start_outgoing_migration(s, p, &local_err);
#endif
    } else {
        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol");
        return;
    }

    if (local_err) {
        migrate_fd_error(s);
        error_propagate(errp, local_err);
        return;
    }

    notifier_list_notify(&migration_state_notifiers, s);
}
Exemplo n.º 8
0
static void tcp_wait_for_connect(int fd, void *opaque)
{
    FdMigrationState *s = opaque;

    if (fd < 0) {
        DPRINTF("migrate connect error\n");
        s->fd = -1;
        migrate_fd_error(s);
    } else {
        DPRINTF("migrate connect success\n");
        s->fd = fd;
        migrate_fd_connect(s);
    }
}
Exemplo n.º 9
0
static void unix_wait_for_connect(int fd, void *opaque)
{
    MigrationState *s = opaque;

    if (fd < 0) {
        DPRINTF("migrate connect error\n");
        s->file = NULL;
        migrate_fd_error(s);
    } else {
        DPRINTF("migrate connect success\n");
        s->file = qemu_fopen_socket(fd, "wb");
        migrate_fd_connect(s);
    }
}
Exemplo n.º 10
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();
            }
        }
    }
}
Exemplo n.º 11
0
static void unix_wait_for_connect(int fd, void *opaque)
{
    MigrationState *s = opaque;

    if (fd < 0) {
        DPRINTF("migrate connect error\n");
        s->fd = -1;
        migrate_fd_error(s);
    } else {
        DPRINTF("migrate connect success\n");
        s->fd = fd;
        qemu_set_block(s->fd);
        migrate_fd_connect(s);
    }
}
Exemplo n.º 12
0
void migrate_fd_connect(MigrationState *s)
{
    int ret;

    s->state = MIG_STATE_ACTIVE;
    s->file = qemu_fopen_ops_buffered(s);

    DPRINTF("beginning savevm\n");
    ret = qemu_savevm_state_begin(s->file, &s->params);
    if (ret < 0) {
        DPRINTF("failed, %d\n", ret);
        migrate_fd_error(s);
        return;
    }
    migrate_fd_put_ready(s);
}
Exemplo n.º 13
0
static void migration_tls_outgoing_handshake(Object *src,
                                             Error *err,
                                             gpointer opaque)
{
    MigrationState *s = opaque;
    QIOChannel *ioc = QIO_CHANNEL(src);

    if (err) {
        trace_migration_tls_outgoing_handshake_error(error_get_pretty(err));
        s->to_dst_file = NULL;
        migrate_fd_error(s, err);
    } else {
        trace_migration_tls_outgoing_handshake_complete();
        migration_set_outgoing_channel(s, ioc, NULL);
    }
    object_unref(OBJECT(ioc));
}
Exemplo n.º 14
0
static void tcp_wait_for_connect(void *opaque)
{
    FdMigrationState *s = opaque;
    int ret;

    dprintf("connect completed\n");
    ret = socket_get_error(s->fd);
    if (ret < 0) {
        dprintf("error connecting %d\n", val);
        migrate_fd_error(s);
        return;
    }

    qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);

    migrate_fd_connect(s);
}
Exemplo n.º 15
0
static void socket_outgoing_migration(QIOTask *task,
                                      gpointer opaque)
{
    struct SocketConnectData *data = opaque;
    QIOChannel *sioc = QIO_CHANNEL(qio_task_get_source(task));
    Error *err = NULL;

    if (qio_task_propagate_error(task, &err)) {
        trace_migration_socket_outgoing_error(error_get_pretty(err));
        data->s->to_dst_file = NULL;
        migrate_fd_error(data->s, err);
        error_free(err);
    } else {
        trace_migration_socket_outgoing_connected(data->hostname);
        migration_channel_connect(data->s, sioc, data->hostname);
    }
    object_unref(OBJECT(sioc));
}
Exemplo n.º 16
0
MigrationState *tcp_start_outgoing_migration(Monitor *mon,
                                             const char *host_port,
                                             int64_t bandwidth_limit,
                                             int detach,
                                             int blk,
                                             int inc,
                                             Error **errp)
{
    FdMigrationState *s;

    s = qemu_mallocz(sizeof(*s));

    s->get_error = socket_errno;
    s->write = socket_write;
    s->close = tcp_close;
    s->mig_state.cancel = migrate_fd_cancel;
    s->mig_state.get_status = migrate_fd_get_status;
    s->mig_state.release = migrate_fd_release;

    s->mig_state.blk = blk;
    s->mig_state.shared = inc;

    s->state = MIG_STATE_ACTIVE;
    trace_migrate_set_state(MIG_STATE_ACTIVE);
    s->mon = NULL;
    s->bandwidth_limit = bandwidth_limit;

    if (!detach) {
        migrate_fd_monitor_suspend(s, mon);
    }

    s->fd = inet_nonblocking_connect(host_port, tcp_wait_for_connect, s,
                                     errp);
    if (error_is_set(errp)) {
        migrate_fd_error(s);
        qemu_free(s);
        return NULL;
    }

    return &s->mig_state;
}
Exemplo n.º 17
0
void migrate_fd_connect(FdMigrationState *s)
{
    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->file);
    if (ret < 0) {
        dprintf("failed, %d\n", ret);
        migrate_fd_error(s);
        return;
    }

    migrate_fd_put_ready(s);
}
Exemplo n.º 18
0
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);
}
Exemplo n.º 19
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;
}