/*
 * QEMU Management Protocol commands
 *
 * 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 "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/cutils.h"
#include "qemu/option.h"
#include "monitor/monitor.h"
#include "sysemu/sysemu.h"
#include "qemu/config-file.h"
#include "qemu/uuid.h"
#include "chardev/char.h"
#include "ui/qemu-spice.h"
#include "ui/vnc.h"
#include "sysemu/kvm.h"
#include "sysemu/runstate.h"
#include "sysemu/arch_init.h"
#include "sysemu/blockdev.h"
#include "sysemu/block-backend.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-acpi.h"
#include "qapi/qapi-commands-block.h"
#include "qapi/qapi-commands-control.h"
#include "qapi/qapi-commands-machine.h"
#include "qapi/qapi-commands-misc.h"
#include "qapi/qapi-commands-ui.h"
#include "qapi/qmp/qerror.h"
#include "hw/mem/memory-device.h"
#include "hw/acpi/acpi_dev_interface.h"

NameInfo *qmp_query_name(Error **errp)
{
    NameInfo *info = g_malloc0(sizeof(*info));

    if (qemu_name) {
        info->has_name = true;
        info->name = g_strdup(qemu_name);
    }

    return info;
}

KvmInfo *qmp_query_kvm(Error **errp)
{
    KvmInfo *info = g_malloc0(sizeof(*info));

    info->enabled = kvm_enabled();
    info->present = kvm_available();

    return info;
}

UuidInfo *qmp_query_uuid(Error **errp)
{
    UuidInfo *info = g_malloc0(sizeof(*info));

    info->UUID = qemu_uuid_unparse_strdup(&qemu_uuid);
    return info;
}

void qmp_quit(Error **errp)
{
    no_shutdown = 0;
    qemu_system_shutdown_request(SHUTDOWN_CAUSE_HOST_QMP_QUIT);
}

void qmp_stop(Error **errp)
{
    /* if there is a dump in background, we should wait until the dump
     * finished */
    if (dump_in_progress()) {
        error_setg(errp, "There is a dump in process, please wait.");
        return;
    }

    if (runstate_check(RUN_STATE_INMIGRATE)) {
        autostart = 0;
    } else {
        vm_stop(RUN_STATE_PAUSED);
    }
}

void qmp_system_reset(Error **errp)
{
    qemu_system_reset_request(SHUTDOWN_CAUSE_HOST_QMP_SYSTEM_RESET);
}

void qmp_system_powerdown(Error **errp)
{
    qemu_system_powerdown_request();
}

void qmp_x_exit_preconfig(Error **errp)
{
    if (!runstate_check(RUN_STATE_PRECONFIG)) {
        error_setg(errp, "The command is permitted only in '%s' state",
                   RunState_str(RUN_STATE_PRECONFIG));
        return;
    }
    qemu_exit_preconfig_request();
}

void qmp_cont(Error **errp)
{
    BlockBackend *blk;
    BlockJob *job;
    Error *local_err = NULL;

    /* if there is a dump in background, we should wait until the dump
     * finished */
    if (dump_in_progress()) {
        error_setg(errp, "There is a dump in process, please wait.");
        return;
    }

    if (runstate_needs_reset()) {
        error_setg(errp, "Resetting the Virtual Machine is required");
        return;
    } else if (runstate_check(RUN_STATE_SUSPENDED)) {
        return;
    } else if (runstate_check(RUN_STATE_FINISH_MIGRATE)) {
        error_setg(errp, "Migration is not finalized yet");
        return;
    }

    for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
        blk_iostatus_reset(blk);
    }

    for (job = block_job_next(NULL); job; job = block_job_next(job)) {
        block_job_iostatus_reset(job);
    }

    /* Continuing after completed migration. Images have been inactivated to
     * allow the destination to take control. Need to get control back now.
     *
     * If there are no inactive block nodes (e.g. because the VM was just
     * paused rather than completing a migration), bdrv_inactivate_all() simply
     * doesn't do anything. */
    bdrv_invalidate_cache_all(&local_err);
    if (local_err) {
        error_propagate(errp, local_err);
        return;
    }

    if (runstate_check(RUN_STATE_INMIGRATE)) {
        autostart = 1;
    } else {
        vm_start();
    }
}

void qmp_system_wakeup(Error **errp)
{
    if (!qemu_wakeup_suspend_enabled()) {
        error_setg(errp,
                   "wake-up from suspend is not supported by this guest");
        return;
    }

    qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, errp);
}

void qmp_set_password(const char *protocol, const char *password,
                      bool has_connected, const char *connected, Error **errp)
{
    int disconnect_if_connected = 0;
    int fail_if_connected = 0;
    int rc;

    if (has_connected) {
        if (strcmp(connected, "fail") == 0) {
            fail_if_connected = 1;
        } else if (strcmp(connected, "disconnect") == 0) {
            disconnect_if_connected = 1;
        } else if (strcmp(connected, "keep") == 0) {
            /* nothing */
        } else {
            error_setg(errp, QERR_INVALID_PARAMETER, "connected");
            return;
        }
    }

    if (strcmp(protocol, "spice") == 0) {
        if (!qemu_using_spice(errp)) {
            return;
        }
        rc = qemu_spice.set_passwd(password, fail_if_connected,
                                   disconnect_if_connected);
    } else if (strcmp(protocol, "vnc") == 0) {
        if (fail_if_connected || disconnect_if_connected) {
            /* vnc supports "connected=keep" only */
            error_setg(errp, QERR_INVALID_PARAMETER, "connected");
            return;
        }
        /* Note that setting an empty password will not disable login through
         * this interface. */
        rc = vnc_display_password(NULL, password);
    } else {
        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "protocol",
                   "'vnc' or 'spice'");
        return;
    }

    if (rc != 0) {
        error_setg(errp, "Could not set password");
    }
}

void qmp_expire_password(const char *protocol, const char *whenstr,
                         Error **errp)
{
    time_t when;
    int rc;

    if (strcmp(whenstr, "now") == 0) {
        when = 0;
    } else if (strcmp(whenstr, "never") == 0) {
        when = TIME_MAX;
    } else if (whenstr[0] == '+') {
        when = time(NULL) + strtoull(whenstr+1, NULL, 10);
    } else {
        when = strtoull(whenstr, NULL, 10);
    }

    if (strcmp(protocol, "spice") == 0) {
        if (!qemu_using_spice(errp)) {
            return;
        }
        rc = qemu_spice.set_pw_expire(when);
    } else if (strcmp(protocol, "vnc") == 0) {
        rc = vnc_display_pw_expire(NULL, when);
    } else {
        error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "protocol",
                   "'vnc' or 'spice'");
        return;
    }

    if (rc != 0) {
        error_setg(errp, "Could not set password expire time");
    }
}

#ifdef CONFIG_VNC
void qmp_change_vnc_password(const char *password, Error **errp)
{
    if (vnc_display_password(NULL, password) < 0) {
        error_setg(errp, "Could not set password");
    }
}

static void qmp_change_vnc_listen(const char *target, Error **errp)
{
    QemuOptsList *olist = qemu_find_opts("vnc");
    QemuOpts *opts;

    if (strstr(target, "id=")) {
        error_setg(errp, "id not supported");
        return;
    }

    opts = qemu_opts_find(olist, "default");
    if (opts) {
        qemu_opts_del(opts);
    }
    opts = vnc_parse(target, errp);
    if (!opts) {
        return;
    }

    vnc_display_open("default", errp);
}

static void qmp_change_vnc(const char *target, bool has_arg, const char *arg,
                           Error **errp)
{
    if (strcmp(target, "passwd") == 0 || strcmp(target, "password") == 0) {
        if (!has_arg) {
            error_setg(errp, QERR_MISSING_PARAMETER, "password");
        } else {
            qmp_change_vnc_password(arg, errp);
        }
    } else {
        qmp_change_vnc_listen(target, errp);
    }
}
#endif /* !CONFIG_VNC */

void qmp_change(const char *device, const char *target,
                bool has_arg, const char *arg, Error **errp)
{
    if (strcmp(device, "vnc") == 0) {
#ifdef CONFIG_VNC
        qmp_change_vnc(target, has_arg, arg, errp);
#else
        error_setg(errp, QERR_FEATURE_DISABLED, "vnc");
#endif
    } else {
        qmp_blockdev_change_medium(true, device, false, NULL, target,
                                   has_arg, arg, false, 0, errp);
    }
}

void qmp_add_client(const char *protocol, const char *fdname,
                    bool has_skipauth, bool skipauth, bool has_tls, bool tls,
                    Error **errp)
{
    Chardev *s;
    int fd;

    fd = monitor_get_fd(monitor_cur(), fdname, errp);
    if (fd < 0) {
        return;
    }

    if (strcmp(protocol, "spice") == 0) {
        if (!qemu_using_spice(errp)) {
            close(fd);
            return;
        }
        skipauth = has_skipauth ? skipauth : false;
        tls = has_tls ? tls : false;
        if (qemu_spice.display_add_client(fd, skipauth, tls) < 0) {
            error_setg(errp, "spice failed to add client");
            close(fd);
        }
        return;
#ifdef CONFIG_VNC
    } else if (strcmp(protocol, "vnc") == 0) {
        skipauth = has_skipauth ? skipauth : false;
        vnc_display_add_client(NULL, fd, skipauth);
        return;
#endif
    } else if ((s = qemu_chr_find(protocol)) != NULL) {
        if (qemu_chr_add_client(s, fd) < 0) {
            error_setg(errp, "failed to add client");
            close(fd);
            return;
        }
        return;
    }

    error_setg(errp, "protocol '%s' is invalid", protocol);
    close(fd);
}


MemoryDeviceInfoList *qmp_query_memory_devices(Error **errp)
{
    return qmp_memory_device_list();
}

ACPIOSTInfoList *qmp_query_acpi_ospm_status(Error **errp)
{
    bool ambig;
    ACPIOSTInfoList *head = NULL;
    ACPIOSTInfoList **prev = &head;
    Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, &ambig);

    if (obj) {
        AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
        AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);

        adevc->ospm_status(adev, &prev);
    } else {
        error_setg(errp, "command is not supported, missing ACPI device");
    }

    return head;
}

MemoryInfo *qmp_query_memory_size_summary(Error **errp)
{
    MemoryInfo *mem_info = g_malloc0(sizeof(MemoryInfo));

    mem_info->base_memory = ram_size;

    mem_info->plugged_memory = get_plugged_memory_size();
    mem_info->has_plugged_memory =
        mem_info->plugged_memory != (uint64_t)-1;

    return mem_info;
}