virtio: decrement vq->inuse in virtqueue_discard()

[mirror_qemu.git] / qapi / qmp-registry.c

/*
 * Core Definitions for QAPI/QMP Dispatch
 *
 * Copyright IBM, Corp. 2011
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *  Michael Roth      <mdroth@us.ibm.com>
 *
 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
 * See the COPYING.LIB file in the top-level directory.
 *
 */

#include "qemu/osdep.h"
#include "qapi/qmp/dispatch.h"

static QTAILQ_HEAD(QmpCommandList, QmpCommand) qmp_commands =
    QTAILQ_HEAD_INITIALIZER(qmp_commands);

void qmp_register_command(const char *name, QmpCommandFunc *fn,
                          QmpCommandOptions options)
{
    QmpCommand *cmd = g_malloc0(sizeof(*cmd));

    cmd->name = name;
    cmd->fn = fn;
    cmd->enabled = true;
    cmd->options = options;
    QTAILQ_INSERT_TAIL(&qmp_commands, cmd, node);
}

QmpCommand *qmp_find_command(const char *name)
{
    QmpCommand *cmd;

    QTAILQ_FOREACH(cmd, &qmp_commands, node) {
        if (strcmp(cmd->name, name) == 0) {
            return cmd;
        }
    }
    return NULL;
}

static void qmp_toggle_command(const char *name, bool enabled)
{
    QmpCommand *cmd;

    QTAILQ_FOREACH(cmd, &qmp_commands, node) {
        if (strcmp(cmd->name, name) == 0) {
            cmd->enabled = enabled;
            return;
        }
    }
}

void qmp_disable_command(const char *name)
{
    qmp_toggle_command(name, false);
}

void qmp_enable_command(const char *name)
{
    qmp_toggle_command(name, true);
}

bool qmp_command_is_enabled(const QmpCommand *cmd)
{
    return cmd->enabled;
}

const char *qmp_command_name(const QmpCommand *cmd)
{
    return cmd->name;
}

bool qmp_has_success_response(const QmpCommand *cmd)
{
    return !(cmd->options & QCO_NO_SUCCESS_RESP);
}

void qmp_for_each_command(qmp_cmd_callback_fn fn, void *opaque)
{
    QmpCommand *cmd;

    QTAILQ_FOREACH(cmd, &qmp_commands, node) {
        fn(cmd, opaque);
    }
}