qapi: Generalize command policy checking

[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"

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

    /* QCO_COROUTINE and QCO_ALLOW_OOB are incompatible for now */
    assert(!((options & QCO_COROUTINE) && (options & QCO_ALLOW_OOB)));

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

const QmpCommand *qmp_find_command(const QmpCommandList *cmds, const char *name)
{
    QmpCommand *cmd;

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

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

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

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

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

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(const QmpCommandList *cmds, qmp_cmd_callback_fn fn,
                          void *opaque)
{
    const QmpCommand *cmd;

    QTAILQ_FOREACH(cmd, cmds, node) {
        fn(cmd, opaque);
    }
}