Archipelago » qemu

/*

 * Human Monitor Interface

 *

 * Copyright IBM, Corp. 2011

 *

 * Authors:

 *  Anthony Liguori   <aliguori@us.ibm.com>

 *

 * This work is licensed under the terms of the GNU GPL, version 2.  See

 * the COPYING file in the top-level directory.

 *

 * Contributions after 2012-01-13 are licensed under the terms of the

 * GNU GPL, version 2 or (at your option) any later version.

 */

#include "hmp.h"

#include "net.h"

#include "qemu-option.h"

#include "qemu-timer.h"

#include "qmp-commands.h"

#include "monitor.h"

static void hmp_handle_error(Monitor *mon, Error **errp)

{

    if (error_is_set(errp)) {

        monitor_printf(mon, "%s\n", error_get_pretty(*errp));

        error_free(*errp);

    }

}

void hmp_info_name(Monitor *mon)

{

    NameInfo *info;

    info = qmp_query_name(NULL);

    if (info->has_name) {

        monitor_printf(mon, "%s\n", info->name);

    }

    qapi_free_NameInfo(info);

}

void hmp_info_version(Monitor *mon)

{

    VersionInfo *info;

    info = qmp_query_version(NULL);

    monitor_printf(mon, "%" PRId64 ".%" PRId64 ".%" PRId64 "%s\n",

                   info->qemu.major, info->qemu.minor, info->qemu.micro,

                   info->package);

    qapi_free_VersionInfo(info);

}

void hmp_info_kvm(Monitor *mon)

{

    KvmInfo *info;

    info = qmp_query_kvm(NULL);

    monitor_printf(mon, "kvm support: ");

    if (info->present) {

        monitor_printf(mon, "%s\n", info->enabled ? "enabled" : "disabled");

    } else {

        monitor_printf(mon, "not compiled\n");

    }

    qapi_free_KvmInfo(info);

}

void hmp_info_status(Monitor *mon)

{

    StatusInfo *info;

    info = qmp_query_status(NULL);

    monitor_printf(mon, "VM status: %s%s",

                   info->running ? "running" : "paused",

                   info->singlestep ? " (single step mode)" : "");

    if (!info->running && info->status != RUN_STATE_PAUSED) {

        monitor_printf(mon, " (%s)", RunState_lookup[info->status]);

    }

    monitor_printf(mon, "\n");

    qapi_free_StatusInfo(info);

}

void hmp_info_uuid(Monitor *mon)

{

    UuidInfo *info;

    info = qmp_query_uuid(NULL);

    monitor_printf(mon, "%s\n", info->UUID);

    qapi_free_UuidInfo(info);

}

void hmp_info_chardev(Monitor *mon)

{

    ChardevInfoList *char_info, *info;

    char_info = qmp_query_chardev(NULL);

    for (info = char_info; info; info = info->next) {

        monitor_printf(mon, "%s: filename=%s\n", info->value->label,

                                                 info->value->filename);

    }

    qapi_free_ChardevInfoList(char_info);

}

void hmp_info_mice(Monitor *mon)

{

    MouseInfoList *mice_list, *mouse;

    mice_list = qmp_query_mice(NULL);

    if (!mice_list) {

        monitor_printf(mon, "No mouse devices connected\n");

        return;

    }

    for (mouse = mice_list; mouse; mouse = mouse->next) {

        monitor_printf(mon, "%c Mouse #%" PRId64 ": %s%s\n",

                       mouse->value->current ? '*' : ' ',

                       mouse->value->index, mouse->value->name,

                       mouse->value->absolute ? " (absolute)" : "");

    }

    qapi_free_MouseInfoList(mice_list);

}

void hmp_info_migrate(Monitor *mon)

{

    MigrationInfo *info;

    info = qmp_query_migrate(NULL);

    if (info->has_status) {

        monitor_printf(mon, "Migration status: %s\n", info->status);

    }

    if (info->has_ram) {

        monitor_printf(mon, "transferred ram: %" PRIu64 " kbytes\n",

                       info->ram->transferred >> 10);

        monitor_printf(mon, "remaining ram: %" PRIu64 " kbytes\n",

                       info->ram->remaining >> 10);

        monitor_printf(mon, "total ram: %" PRIu64 " kbytes\n",

                       info->ram->total >> 10);

        monitor_printf(mon, "total time: %" PRIu64 " milliseconds\n",

                       info->ram->total_time);

    }

    if (info->has_disk) {

        monitor_printf(mon, "transferred disk: %" PRIu64 " kbytes\n",

                       info->disk->transferred >> 10);

        monitor_printf(mon, "remaining disk: %" PRIu64 " kbytes\n",

                       info->disk->remaining >> 10);

        monitor_printf(mon, "total disk: %" PRIu64 " kbytes\n",

                       info->disk->total >> 10);

    }

    qapi_free_MigrationInfo(info);

}

void hmp_info_cpus(Monitor *mon)

{

    CpuInfoList *cpu_list, *cpu;

    cpu_list = qmp_query_cpus(NULL);

    for (cpu = cpu_list; cpu; cpu = cpu->next) {

        int active = ' ';

        if (cpu->value->CPU == monitor_get_cpu_index()) {

            active = '*';

        }

        monitor_printf(mon, "%c CPU #%" PRId64 ": ", active, cpu->value->CPU);

        if (cpu->value->has_pc) {

            monitor_printf(mon, "pc=0x%016" PRIx64, cpu->value->pc);

        }

        if (cpu->value->has_nip) {

            monitor_printf(mon, "nip=0x%016" PRIx64, cpu->value->nip);

        }

        if (cpu->value->has_npc) {

            monitor_printf(mon, "pc=0x%016" PRIx64, cpu->value->pc);

            monitor_printf(mon, "npc=0x%016" PRIx64, cpu->value->npc);

        }

        if (cpu->value->has_PC) {

            monitor_printf(mon, "PC=0x%016" PRIx64, cpu->value->PC);

        }

        if (cpu->value->halted) {

            monitor_printf(mon, " (halted)");

        }

        monitor_printf(mon, " thread_id=%" PRId64 "\n", cpu->value->thread_id);

    }

    qapi_free_CpuInfoList(cpu_list);

}

void hmp_info_block(Monitor *mon)

{

    BlockInfoList *block_list, *info;

    block_list = qmp_query_block(NULL);

    for (info = block_list; info; info = info->next) {

        monitor_printf(mon, "%s: removable=%d",

                       info->value->device, info->value->removable);

        if (info->value->removable) {

            monitor_printf(mon, " locked=%d", info->value->locked);

            monitor_printf(mon, " tray-open=%d", info->value->tray_open);

        }

        if (info->value->has_io_status) {

            monitor_printf(mon, " io-status=%s",

                           BlockDeviceIoStatus_lookup[info->value->io_status]);

        }

        if (info->value->has_inserted) {

            monitor_printf(mon, " file=");

            monitor_print_filename(mon, info->value->inserted->file);

            if (info->value->inserted->has_backing_file) {

                monitor_printf(mon, " backing_file=");

                monitor_print_filename(mon, info->value->inserted->backing_file);

            }

            monitor_printf(mon, " ro=%d drv=%s encrypted=%d",

                           info->value->inserted->ro,

                           info->value->inserted->drv,

                           info->value->inserted->encrypted);

            monitor_printf(mon, " bps=%" PRId64 " bps_rd=%" PRId64

                            " bps_wr=%" PRId64 " iops=%" PRId64

                            " iops_rd=%" PRId64 " iops_wr=%" PRId64,

                            info->value->inserted->bps,

                            info->value->inserted->bps_rd,

                            info->value->inserted->bps_wr,

                            info->value->inserted->iops,

                            info->value->inserted->iops_rd,

                            info->value->inserted->iops_wr);

        } else {

            monitor_printf(mon, " [not inserted]");

        }

        monitor_printf(mon, "\n");

    }

    qapi_free_BlockInfoList(block_list);

}

void hmp_info_blockstats(Monitor *mon)

{

    BlockStatsList *stats_list, *stats;

    stats_list = qmp_query_blockstats(NULL);

    for (stats = stats_list; stats; stats = stats->next) {

        if (!stats->value->has_device) {

            continue;

        }

        monitor_printf(mon, "%s:", stats->value->device);

        monitor_printf(mon, " rd_bytes=%" PRId64

                       " wr_bytes=%" PRId64

                       " rd_operations=%" PRId64

                       " wr_operations=%" PRId64

                       " flush_operations=%" PRId64

                       " wr_total_time_ns=%" PRId64

                       " rd_total_time_ns=%" PRId64

                       " flush_total_time_ns=%" PRId64

                       "\n",

                       stats->value->stats->rd_bytes,

                       stats->value->stats->wr_bytes,

                       stats->value->stats->rd_operations,

                       stats->value->stats->wr_operations,

                       stats->value->stats->flush_operations,

                       stats->value->stats->wr_total_time_ns,

                       stats->value->stats->rd_total_time_ns,

                       stats->value->stats->flush_total_time_ns);

    }

    qapi_free_BlockStatsList(stats_list);

}

void hmp_info_vnc(Monitor *mon)

{

    VncInfo *info;

    Error *err = NULL;

    VncClientInfoList *client;

    info = qmp_query_vnc(&err);

    if (err) {

        monitor_printf(mon, "%s\n", error_get_pretty(err));

        error_free(err);

        return;

    }

    if (!info->enabled) {

        monitor_printf(mon, "Server: disabled\n");

        goto out;

    }

    monitor_printf(mon, "Server:\n");

    if (info->has_host && info->has_service) {

        monitor_printf(mon, "     address: %s:%s\n", info->host, info->service);

    }

    if (info->has_auth) {

        monitor_printf(mon, "        auth: %s\n", info->auth);

    }

    if (!info->has_clients || info->clients == NULL) {

        monitor_printf(mon, "Client: none\n");

    } else {

        for (client = info->clients; client; client = client->next) {

            monitor_printf(mon, "Client:\n");

            monitor_printf(mon, "     address: %s:%s\n",

                           client->value->host, client->value->service);

            monitor_printf(mon, "  x509_dname: %s\n",

                           client->value->x509_dname ?

                           client->value->x509_dname : "none");

            monitor_printf(mon, "    username: %s\n",

                           client->value->has_sasl_username ?

                           client->value->sasl_username : "none");

        }

    }

out:

    qapi_free_VncInfo(info);

}

void hmp_info_spice(Monitor *mon)

{

    SpiceChannelList *chan;

    SpiceInfo *info;

    info = qmp_query_spice(NULL);

    if (!info->enabled) {

        monitor_printf(mon, "Server: disabled\n");

        goto out;

    }

    monitor_printf(mon, "Server:\n");

    if (info->has_port) {

        monitor_printf(mon, "     address: %s:%" PRId64 "\n",

                       info->host, info->port);

    }

    if (info->has_tls_port) {

        monitor_printf(mon, "     address: %s:%" PRId64 " [tls]\n",

                       info->host, info->tls_port);

    }

    monitor_printf(mon, "        auth: %s\n", info->auth);

    monitor_printf(mon, "    compiled: %s\n", info->compiled_version);

    monitor_printf(mon, "  mouse-mode: %s\n",

                   SpiceQueryMouseMode_lookup[info->mouse_mode]);

    if (!info->has_channels || info->channels == NULL) {

        monitor_printf(mon, "Channels: none\n");

    } else {

        for (chan = info->channels; chan; chan = chan->next) {

            monitor_printf(mon, "Channel:\n");

            monitor_printf(mon, "     address: %s:%s%s\n",

                           chan->value->host, chan->value->port,

                           chan->value->tls ? " [tls]" : "");

            monitor_printf(mon, "     session: %" PRId64 "\n",

                           chan->value->connection_id);

            monitor_printf(mon, "     channel: %" PRId64 ":%" PRId64 "\n",

                           chan->value->channel_type, chan->value->channel_id);

        }

    }

out:

    qapi_free_SpiceInfo(info);

}

void hmp_info_balloon(Monitor *mon)

{

    BalloonInfo *info;

    Error *err = NULL;

    info = qmp_query_balloon(&err);

    if (err) {

        monitor_printf(mon, "%s\n", error_get_pretty(err));

        error_free(err);

        return;

    }

    monitor_printf(mon, "balloon: actual=%" PRId64, info->actual >> 20);

    if (info->has_mem_swapped_in) {

        monitor_printf(mon, " mem_swapped_in=%" PRId64, info->mem_swapped_in);

    }

    if (info->has_mem_swapped_out) {

        monitor_printf(mon, " mem_swapped_out=%" PRId64, info->mem_swapped_out);

    }

    if (info->has_major_page_faults) {

        monitor_printf(mon, " major_page_faults=%" PRId64,

                       info->major_page_faults);

    }

    if (info->has_minor_page_faults) {

        monitor_printf(mon, " minor_page_faults=%" PRId64,

                       info->minor_page_faults);

    }

    if (info->has_free_mem) {

        monitor_printf(mon, " free_mem=%" PRId64, info->free_mem);

    }

    if (info->has_total_mem) {

        monitor_printf(mon, " total_mem=%" PRId64, info->total_mem);

    }

    monitor_printf(mon, "\n");

    qapi_free_BalloonInfo(info);

}

static void hmp_info_pci_device(Monitor *mon, const PciDeviceInfo *dev)

{

    PciMemoryRegionList *region;

    monitor_printf(mon, "  Bus %2" PRId64 ", ", dev->bus);

    monitor_printf(mon, "device %3" PRId64 ", function %" PRId64 ":\n",

                   dev->slot, dev->function);

    monitor_printf(mon, "    ");

    if (dev->class_info.has_desc) {

        monitor_printf(mon, "%s", dev->class_info.desc);

    } else {

        monitor_printf(mon, "Class %04" PRId64, dev->class_info.class);

    }

    monitor_printf(mon, ": PCI device %04" PRIx64 ":%04" PRIx64 "\n",

                   dev->id.vendor, dev->id.device);

    if (dev->has_irq) {

        monitor_printf(mon, "      IRQ %" PRId64 ".\n", dev->irq);

    }

    if (dev->has_pci_bridge) {

        monitor_printf(mon, "      BUS %" PRId64 ".\n",

                       dev->pci_bridge->bus.number);

        monitor_printf(mon, "      secondary bus %" PRId64 ".\n",

                       dev->pci_bridge->bus.secondary);

        monitor_printf(mon, "      subordinate bus %" PRId64 ".\n",

                       dev->pci_bridge->bus.subordinate);

        monitor_printf(mon, "      IO range [0x%04"PRIx64", 0x%04"PRIx64"]\n",

                       dev->pci_bridge->bus.io_range->base,

                       dev->pci_bridge->bus.io_range->limit);

        monitor_printf(mon,

                       "      memory range [0x%08"PRIx64", 0x%08"PRIx64"]\n",

                       dev->pci_bridge->bus.memory_range->base,

                       dev->pci_bridge->bus.memory_range->limit);

        monitor_printf(mon, "      prefetchable memory range "

                       "[0x%08"PRIx64", 0x%08"PRIx64"]\n",

                       dev->pci_bridge->bus.prefetchable_range->base,

                       dev->pci_bridge->bus.prefetchable_range->limit);

    }

    for (region = dev->regions; region; region = region->next) {

        uint64_t addr, size;

        addr = region->value->address;

        size = region->value->size;

        monitor_printf(mon, "      BAR%" PRId64 ": ", region->value->bar);

        if (!strcmp(region->value->type, "io")) {

            monitor_printf(mon, "I/O at 0x%04" PRIx64

                                " [0x%04" PRIx64 "].\n",

                           addr, addr + size - 1);

        } else {

            monitor_printf(mon, "%d bit%s memory at 0x%08" PRIx64

                               " [0x%08" PRIx64 "].\n",

                           region->value->mem_type_64 ? 64 : 32,

                           region->value->prefetch ? " prefetchable" : "",

                           addr, addr + size - 1);

        }

    }

    monitor_printf(mon, "      id \"%s\"\n", dev->qdev_id);

    if (dev->has_pci_bridge) {

        if (dev->pci_bridge->has_devices) {

            PciDeviceInfoList *cdev;

            for (cdev = dev->pci_bridge->devices; cdev; cdev = cdev->next) {

                hmp_info_pci_device(mon, cdev->value);

            }

        }

    }

}

void hmp_info_pci(Monitor *mon)

{

    PciInfoList *info_list, *info;

    Error *err = NULL;

    info_list = qmp_query_pci(&err);

    if (err) {

        monitor_printf(mon, "PCI devices not supported\n");

        error_free(err);

        return;

    }

    for (info = info_list; info; info = info->next) {

        PciDeviceInfoList *dev;

        for (dev = info->value->devices; dev; dev = dev->next) {

            hmp_info_pci_device(mon, dev->value);

        }

    }

    qapi_free_PciInfoList(info_list);

}

void hmp_info_block_jobs(Monitor *mon)

{

    BlockJobInfoList *list;

    Error *err = NULL;

    list = qmp_query_block_jobs(&err);

    assert(!err);

    if (!list) {

        monitor_printf(mon, "No active jobs\n");

        return;

    }

    while (list) {

        if (strcmp(list->value->type, "stream") == 0) {

            monitor_printf(mon, "Streaming device %s: Completed %" PRId64

                           " of %" PRId64 " bytes, speed limit %" PRId64

                           " bytes/s\n",

                           list->value->device,

                           list->value->offset,

                           list->value->len,

                           list->value->speed);

        } else {

            monitor_printf(mon, "Type %s, device %s: Completed %" PRId64

                           " of %" PRId64 " bytes, speed limit %" PRId64

                           " bytes/s\n",

                           list->value->type,

                           list->value->device,

                           list->value->offset,

                           list->value->len,

                           list->value->speed);

        }

        list = list->next;

    }

}

void hmp_quit(Monitor *mon, const QDict *qdict)

{

    monitor_suspend(mon);

    qmp_quit(NULL);

}

void hmp_stop(Monitor *mon, const QDict *qdict)

{

    qmp_stop(NULL);

}

void hmp_system_reset(Monitor *mon, const QDict *qdict)

{

    qmp_system_reset(NULL);

}

void hmp_system_powerdown(Monitor *mon, const QDict *qdict)

{

    qmp_system_powerdown(NULL);

}

void hmp_cpu(Monitor *mon, const QDict *qdict)

{

    int64_t cpu_index;

    /* XXX: drop the monitor_set_cpu() usage when all HMP commands that

            use it are converted to the QAPI */

    cpu_index = qdict_get_int(qdict, "index");

    if (monitor_set_cpu(cpu_index) < 0) {

        monitor_printf(mon, "invalid CPU index\n");

    }

}

void hmp_memsave(Monitor *mon, const QDict *qdict)

{

    uint32_t size = qdict_get_int(qdict, "size");

    const char *filename = qdict_get_str(qdict, "filename");

    uint64_t addr = qdict_get_int(qdict, "val");

    Error *errp = NULL;

    qmp_memsave(addr, size, filename, true, monitor_get_cpu_index(), &errp);

    hmp_handle_error(mon, &errp);

}

void hmp_pmemsave(Monitor *mon, const QDict *qdict)

{

    uint32_t size = qdict_get_int(qdict, "size");

    const char *filename = qdict_get_str(qdict, "filename");

    uint64_t addr = qdict_get_int(qdict, "val");

    Error *errp = NULL;

    qmp_pmemsave(addr, size, filename, &errp);

    hmp_handle_error(mon, &errp);

}

static void hmp_cont_cb(void *opaque, int err)

{

    Monitor *mon = opaque;

    if (!err) {

        hmp_cont(mon, NULL);

    }

}

void hmp_cont(Monitor *mon, const QDict *qdict)

{

    Error *errp = NULL;

    qmp_cont(&errp);

    if (error_is_set(&errp)) {

        if (error_is_type(errp, QERR_DEVICE_ENCRYPTED)) {

            const char *device;

            /* The device is encrypted. Ask the user for the password

               and retry */

            device = error_get_field(errp, "device");

            assert(device != NULL);

            monitor_read_block_device_key(mon, device, hmp_cont_cb, mon);

            error_free(errp);

            return;

        }

        hmp_handle_error(mon, &errp);

    }

}

void hmp_system_wakeup(Monitor *mon, const QDict *qdict)

{

    qmp_system_wakeup(NULL);

}

void hmp_inject_nmi(Monitor *mon, const QDict *qdict)

{

    Error *errp = NULL;

    qmp_inject_nmi(&errp);

    hmp_handle_error(mon, &errp);

}

void hmp_set_link(Monitor *mon, const QDict *qdict)

{

    const char *name = qdict_get_str(qdict, "name");

    int up = qdict_get_bool(qdict, "up");

    Error *errp = NULL;

    qmp_set_link(name, up, &errp);

    hmp_handle_error(mon, &errp);

}

void hmp_block_passwd(Monitor *mon, const QDict *qdict)

{

    const char *device = qdict_get_str(qdict, "device");

    const char *password = qdict_get_str(qdict, "password");

    Error *errp = NULL;

    qmp_block_passwd(device, password, &errp);

    hmp_handle_error(mon, &errp);

}

void hmp_balloon(Monitor *mon, const QDict *qdict)

{

    int64_t value = qdict_get_int(qdict, "value");

    Error *errp = NULL;

    qmp_balloon(value, &errp);

    if (error_is_set(&errp)) {

        monitor_printf(mon, "balloon: %s\n", error_get_pretty(errp));

        error_free(errp);

    }

}

void hmp_block_resize(Monitor *mon, const QDict *qdict)

{

    const char *device = qdict_get_str(qdict, "device");

    int64_t size = qdict_get_int(qdict, "size");

    Error *errp = NULL;

    qmp_block_resize(device, size, &errp);

    hmp_handle_error(mon, &errp);

}

void hmp_snapshot_blkdev(Monitor *mon, const QDict *qdict)

{

    const char *device = qdict_get_str(qdict, "device");

    const char *filename = qdict_get_try_str(qdict, "snapshot-file");

    const char *format = qdict_get_try_str(qdict, "format");

    int reuse = qdict_get_try_bool(qdict, "reuse", 0);

    enum NewImageMode mode;

    Error *errp = NULL;

    if (!filename) {

        /* In the future, if 'snapshot-file' is not specified, the snapshot

           will be taken internally. Today it's actually required. */

        error_set(&errp, QERR_MISSING_PARAMETER, "snapshot-file");

        hmp_handle_error(mon, &errp);

        return;

    }

    mode = reuse ? NEW_IMAGE_MODE_EXISTING : NEW_IMAGE_MODE_ABSOLUTE_PATHS;

    qmp_blockdev_snapshot_sync(device, filename, !!format, format,

                               true, mode, &errp);

    hmp_handle_error(mon, &errp);

}

void hmp_migrate_cancel(Monitor *mon, const QDict *qdict)

{

    qmp_migrate_cancel(NULL);

}

void hmp_migrate_set_downtime(Monitor *mon, const QDict *qdict)

{

    double value = qdict_get_double(qdict, "value");

    qmp_migrate_set_downtime(value, NULL);

}

void hmp_migrate_set_speed(Monitor *mon, const QDict *qdict)

{

    int64_t value = qdict_get_int(qdict, "value");

    qmp_migrate_set_speed(value, NULL);

}

void hmp_set_password(Monitor *mon, const QDict *qdict)

{

    const char *protocol  = qdict_get_str(qdict, "protocol");

    const char *password  = qdict_get_str(qdict, "password");

    const char *connected = qdict_get_try_str(qdict, "connected");

    Error *err = NULL;

    qmp_set_password(protocol, password, !!connected, connected, &err);

    hmp_handle_error(mon, &err);

}

void hmp_expire_password(Monitor *mon, const QDict *qdict)

{

    const char *protocol  = qdict_get_str(qdict, "protocol");

    const char *whenstr = qdict_get_str(qdict, "time");

    Error *err = NULL;

    qmp_expire_password(protocol, whenstr, &err);

    hmp_handle_error(mon, &err);

}

void hmp_eject(Monitor *mon, const QDict *qdict)

{

    int force = qdict_get_try_bool(qdict, "force", 0);

    const char *device = qdict_get_str(qdict, "device");

    Error *err = NULL;

    qmp_eject(device, true, force, &err);

    hmp_handle_error(mon, &err);

}

static void hmp_change_read_arg(Monitor *mon, const char *password,

                                void *opaque)

{

    qmp_change_vnc_password(password, NULL);

    monitor_read_command(mon, 1);

}

static void cb_hmp_change_bdrv_pwd(Monitor *mon, const char *password,

                                   void *opaque)

{

    Error *encryption_err = opaque;

    Error *err = NULL;

    const char *device;

    device = error_get_field(encryption_err, "device");

    qmp_block_passwd(device, password, &err);

    hmp_handle_error(mon, &err);

    error_free(encryption_err);

    monitor_read_command(mon, 1);

}

void hmp_change(Monitor *mon, const QDict *qdict)

{

    const char *device = qdict_get_str(qdict, "device");

    const char *target = qdict_get_str(qdict, "target");

    const char *arg = qdict_get_try_str(qdict, "arg");

    Error *err = NULL;

    if (strcmp(device, "vnc") == 0 &&

            (strcmp(target, "passwd") == 0 ||

             strcmp(target, "password") == 0)) {

        if (!arg) {

            monitor_read_password(mon, hmp_change_read_arg, NULL);

            return;

        }

    }

    qmp_change(device, target, !!arg, arg, &err);

    if (error_is_type(err, QERR_DEVICE_ENCRYPTED)) {

        monitor_printf(mon, "%s (%s) is encrypted.\n",

                       error_get_field(err, "device"),

                       error_get_field(err, "filename"));

        if (!monitor_get_rs(mon)) {

            monitor_printf(mon,

                    "terminal does not support password prompting\n");

            error_free(err);

            return;

        }

        readline_start(monitor_get_rs(mon), "Password: ", 1,

                       cb_hmp_change_bdrv_pwd, err);

        return;

    }

    hmp_handle_error(mon, &err);

}

void hmp_block_set_io_throttle(Monitor *mon, const QDict *qdict)

{

    Error *err = NULL;

    qmp_block_set_io_throttle(qdict_get_str(qdict, "device"),

                              qdict_get_int(qdict, "bps"),

                              qdict_get_int(qdict, "bps_rd"),

                              qdict_get_int(qdict, "bps_wr"),

                              qdict_get_int(qdict, "iops"),

                              qdict_get_int(qdict, "iops_rd"),

                              qdict_get_int(qdict, "iops_wr"), &err);