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 void qmp_unregister_command(const char *name)
  34 {
  35     QmpCommand *cmd = qmp_find_command(name);
  36
  37     QTAILQ_REMOVE(&qmp_commands, cmd, node);
  38     g_free(cmd);
  39 }
  40
  41 QmpCommand *qmp_find_command(const char *name)
  42 {
  43     QmpCommand *cmd;
  44
  45     QTAILQ_FOREACH(cmd, &qmp_commands, node) {
  46         if (strcmp(cmd->name, name) == 0) {
  47             return cmd;
  48         }
  49     }
  50     return NULL;
  51 }
  52
  53 static void qmp_toggle_command(const char *name, bool enabled)
  54 {
  55     QmpCommand *cmd;
  56
  57     QTAILQ_FOREACH(cmd, &qmp_commands, node) {
  58         if (strcmp(cmd->name, name) == 0) {
  59             cmd->enabled = enabled;
  60             return;
  61         }
  62     }
  63 }
  64
  65 void qmp_disable_command(const char *name)
  66 {
  67     qmp_toggle_command(name, false);
  68 }
  69
  70 void qmp_enable_command(const char *name)
  71 {
  72     qmp_toggle_command(name, true);
  73 }
  74
  75 bool qmp_command_is_enabled(const QmpCommand *cmd)
  76 {
  77     return cmd->enabled;
  78 }
  79
  80 const char *qmp_command_name(const QmpCommand *cmd)
  81 {
  82     return cmd->name;
  83 }
  84
  85 bool qmp_has_success_response(const QmpCommand *cmd)
  86 {
  87     return !(cmd->options & QCO_NO_SUCCESS_RESP);
  88 }
  89
  90 void qmp_for_each_command(qmp_cmd_callback_fn fn, void *opaque)
  91 {
  92     QmpCommand *cmd;
  93
  94     QTAILQ_FOREACH(cmd, &qmp_commands, node) {
  95         fn(cmd, opaque);
  96     }
  97 }