qapi/qmp-registry.c

   1 /*
   2  * Core Definitions for QAPI/QMP Dispatch
   3  *
   4  * Copyright IBM, Corp. 2011
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *  Michael Roth      <mdroth@us.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
  11  * See the COPYING.LIB file in the top-level directory.
  12  *
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "qapi/qmp/dispatch.h"
  17
  18 static QTAILQ_HEAD(QmpCommandList, QmpCommand) qmp_commands =
  19     QTAILQ_HEAD_INITIALIZER(qmp_commands);
  20
  21 void qmp_register_command(const char *name, QmpCommandFunc *fn,
  22                           QmpCommandOptions options)
  23 {
  24     QmpCommand *cmd = g_malloc0(sizeof(*cmd));
  25
  26     cmd->name = name;
  27     cmd->fn = fn;
  28     cmd->enabled = true;
  29     cmd->options = options;
  30     QTAILQ_INSERT_TAIL(&qmp_commands, cmd, node);
  31 }
  32
  33 QmpCommand *qmp_find_command(const char *name)
  34 {
  35     QmpCommand *cmd;
  36
  37     QTAILQ_FOREACH(cmd, &qmp_commands, node) {
  38         if (strcmp(cmd->name, name) == 0) {
  39             return cmd;
  40         }
  41     }
  42     return NULL;
  43 }
  44
  45 static void qmp_toggle_command(const char *name, bool enabled)
  46 {
  47     QmpCommand *cmd;
  48
  49     QTAILQ_FOREACH(cmd, &qmp_commands, node) {
  50         if (strcmp(cmd->name, name) == 0) {
  51             cmd->enabled = enabled;
  52             return;
  53         }
  54     }
  55 }
  56
  57 void qmp_disable_command(const char *name)
  58 {
  59     qmp_toggle_command(name, false);
  60 }
  61
  62 void qmp_enable_command(const char *name)
  63 {
  64     qmp_toggle_command(name, true);
  65 }
  66
  67 bool qmp_command_is_enabled(const QmpCommand *cmd)
  68 {
  69     return cmd->enabled;
  70 }
  71
  72 const char *qmp_command_name(const QmpCommand *cmd)
  73 {
  74     return cmd->name;
  75 }
  76
  77 bool qmp_has_success_response(const QmpCommand *cmd)
  78 {
  79     return !(cmd->options & QCO_NO_SUCCESS_RESP);
  80 }
  81
  82 void qmp_for_each_command(qmp_cmd_callback_fn fn, void *opaque)
  83 {
  84     QmpCommand *cmd;
  85
  86     QTAILQ_FOREACH(cmd, &qmp_commands, node) {
  87         fn(cmd, opaque);
  88     }
  89 }