9ce44e2ce2
This moves the QMP dispatcher to a coroutine and runs all QMP command handlers that declare 'coroutine': true in coroutine context so they can avoid blocking the main loop while doing I/O or waiting for other events. For commands that are not declared safe to run in a coroutine, the dispatcher drops out of coroutine context by calling the QMP command handler from a bottom half. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20201005155855.256490-10-kwolf@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
/*
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* Core Definitions for QAPI/QMP Dispatch
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*
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* Copyright IBM, Corp. 2011
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Michael Roth <mdroth@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
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* See the COPYING.LIB file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qapi/qmp/dispatch.h"
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void qmp_register_command(QmpCommandList *cmds, const char *name,
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QmpCommandFunc *fn, QmpCommandOptions options)
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{
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QmpCommand *cmd = g_malloc0(sizeof(*cmd));
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/* QCO_COROUTINE and QCO_ALLOW_OOB are incompatible for now */
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assert(!((options & QCO_COROUTINE) && (options & QCO_ALLOW_OOB)));
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cmd->name = name;
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cmd->fn = fn;
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cmd->enabled = true;
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cmd->options = options;
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QTAILQ_INSERT_TAIL(cmds, cmd, node);
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}
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const QmpCommand *qmp_find_command(const QmpCommandList *cmds, const char *name)
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{
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QmpCommand *cmd;
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QTAILQ_FOREACH(cmd, cmds, node) {
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if (strcmp(cmd->name, name) == 0) {
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return cmd;
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}
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}
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return NULL;
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}
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static void qmp_toggle_command(QmpCommandList *cmds, const char *name,
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bool enabled)
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{
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QmpCommand *cmd;
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QTAILQ_FOREACH(cmd, cmds, node) {
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if (strcmp(cmd->name, name) == 0) {
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cmd->enabled = enabled;
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return;
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}
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}
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}
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void qmp_disable_command(QmpCommandList *cmds, const char *name)
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{
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qmp_toggle_command(cmds, name, false);
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}
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void qmp_enable_command(QmpCommandList *cmds, const char *name)
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{
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qmp_toggle_command(cmds, name, true);
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}
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bool qmp_command_is_enabled(const QmpCommand *cmd)
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{
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return cmd->enabled;
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}
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const char *qmp_command_name(const QmpCommand *cmd)
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{
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return cmd->name;
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}
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bool qmp_has_success_response(const QmpCommand *cmd)
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{
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return !(cmd->options & QCO_NO_SUCCESS_RESP);
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}
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void qmp_for_each_command(const QmpCommandList *cmds, qmp_cmd_callback_fn fn,
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void *opaque)
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{
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const QmpCommand *cmd;
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QTAILQ_FOREACH(cmd, cmds, node) {
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fn(cmd, opaque);
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}
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}
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