Archipelago » qemu

static void print_balloon_stat(const char *key, QObject *obj, void *opaque)

{

    Monitor *mon = opaque;

    if (strcmp(key, "actual"))

        monitor_printf(mon, ",%s=%" PRId64, key,

                       qint_get_int(qobject_to_qint(obj)));

}

static void monitor_print_balloon(Monitor *mon, const QObject *data)

{

    QDict *qdict;

    qdict = qobject_to_qdict(data);

    if (!qdict_haskey(qdict, "actual"))

        return;

    monitor_printf(mon, "balloon: actual=%" PRId64,

                   qdict_get_int(qdict, "actual") >> 20);

    qdict_iter(qdict, print_balloon_stat, mon);

    monitor_printf(mon, "\n");

}

/**

 * do_info_balloon(): Balloon information

 *

 * Make an asynchronous request for balloon info.  When the request completes

 * a QDict will be returned according to the following specification:

 *

 * - "actual": current balloon value in bytes

 * The following fields may or may not be present:

 * - "mem_swapped_in": Amount of memory swapped in (bytes)

 * - "mem_swapped_out": Amount of memory swapped out (bytes)

 * - "major_page_faults": Number of major faults

 * - "minor_page_faults": Number of minor faults

 * - "free_mem": Total amount of free and unused memory (bytes)

 * - "total_mem": Total amount of available memory (bytes)

 *

 * Example:

 *

 * { "actual": 1073741824, "mem_swapped_in": 0, "mem_swapped_out": 0,

 *   "major_page_faults": 142, "minor_page_faults": 239245,

 *   "free_mem": 1014185984, "total_mem": 1044668416 }

 */

static int do_info_balloon(Monitor *mon, MonitorCompletion cb, void *opaque)

{

    int ret;

    if (kvm_enabled() && !kvm_has_sync_mmu()) {

        qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon");

        return -1;

    }

    ret = qemu_balloon_status(cb, opaque);

    if (!ret) {

        qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon");

        return -1;

    }

    return 0;

}

/**

 * do_balloon(): Request VM to change its memory allocation

 */

static int do_balloon(Monitor *mon, const QDict *params,

                       MonitorCompletion cb, void *opaque)

{

    int ret;

    if (kvm_enabled() && !kvm_has_sync_mmu()) {

        qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon");

        return -1;

    }

    ret = qemu_balloon(qdict_get_int(params, "value"), cb, opaque);

    if (ret == 0) {

        qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon");

        return -1;

    }

    cb(opaque, NULL);

    return 0;

}