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 void qmp_register_command(QmpCommandList *cmds, const char *name,
  19                           QmpCommandFunc *fn, QmpCommandOptions options)
  20 {
  21     QmpCommand *cmd = g_malloc0(sizeof(*cmd));
  22
  23     /* QCO_COROUTINE and QCO_ALLOW_OOB are incompatible for now */
  24     assert(!((options & QCO_COROUTINE) && (options & QCO_ALLOW_OOB)));
  25
  26     cmd->name = name;
  27     cmd->fn = fn;
  28     cmd->enabled = true;
  29     cmd->options = options;
  30     QTAILQ_INSERT_TAIL(cmds, cmd, node);
  31 }
  32
  33 const QmpCommand *qmp_find_command(const QmpCommandList *cmds, const char *name)
  34 {
  35     QmpCommand *cmd;
  36
  37     QTAILQ_FOREACH(cmd, cmds, node) {
  38         if (strcmp(cmd->name, name) == 0) {
  39             return cmd;
  40         }
  41     }
  42     return NULL;
  43 }
  44
  45 static void qmp_toggle_command(QmpCommandList *cmds, const char *name,
  46                                bool enabled, const char *disable_reason)
  47 {
  48     QmpCommand *cmd;
  49
  50     QTAILQ_FOREACH(cmd, cmds, node) {
  51         if (strcmp(cmd->name, name) == 0) {
  52             cmd->enabled = enabled;
  53             cmd->disable_reason = disable_reason;
  54             return;
  55         }
  56     }
  57 }
  58
  59 void qmp_disable_command(QmpCommandList *cmds, const char *name,
  60                          const char *disable_reason)
  61 {
  62     qmp_toggle_command(cmds, name, false, disable_reason);
  63 }
  64
  65 void qmp_enable_command(QmpCommandList *cmds, const char *name)
  66 {
  67     qmp_toggle_command(cmds, name, true, NULL);
  68 }
  69
  70 bool qmp_command_is_enabled(const QmpCommand *cmd)
  71 {
  72     return cmd->enabled;
  73 }
  74
  75 const char *qmp_command_name(const QmpCommand *cmd)
  76 {
  77     return cmd->name;
  78 }
  79
  80 bool qmp_has_success_response(const QmpCommand *cmd)
  81 {
  82     return !(cmd->options & QCO_NO_SUCCESS_RESP);
  83 }
  84
  85 void qmp_for_each_command(const QmpCommandList *cmds, qmp_cmd_callback_fn fn,
  86                           void *opaque)
  87 {
  88     const QmpCommand *cmd;
  89
  90     QTAILQ_FOREACH(cmd, cmds, node) {
  91         fn(cmd, opaque);
  92     }
  93 }