LXR qemu/migration/yank

   1/*
   2 * migration yank functions
   3 *
   4 * Copyright (c) Lukas Straub <lukasstraub2@web.de>
   5 *
   6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7 * See the COPYING file in the top-level directory.
   8 */
   9
  10#include "qemu/osdep.h"
  11#include "io/channel.h"
  12#include "yank_functions.h"
  13#include "qemu/yank.h"
  14#include "qemu-file.h"
  15
  16void migration_yank_iochannel(void *opaque)
  17{
  18    QIOChannel *ioc = QIO_CHANNEL(opaque);
  19
  20    qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
  21}
  22
  23/* Return whether yank is supported on this ioc */
  24static bool migration_ioc_yank_supported(QIOChannel *ioc)
  25{
  26    return qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_SHUTDOWN);
  27}
  28
  29void migration_ioc_register_yank(QIOChannel *ioc)
  30{
  31    if (migration_ioc_yank_supported(ioc)) {
  32        yank_register_function(MIGRATION_YANK_INSTANCE,
  33                               migration_yank_iochannel,
  34                               ioc);
  35    }
  36}
  37
  38void migration_ioc_unregister_yank(QIOChannel *ioc)
  39{
  40    if (migration_ioc_yank_supported(ioc)) {
  41        yank_unregister_function(MIGRATION_YANK_INSTANCE,
  42                                 migration_yank_iochannel,
  43                                 ioc);
  44    }
  45}
  46
  47void migration_ioc_unregister_yank_from_file(QEMUFile *file)
  48{
  49    QIOChannel *ioc = qemu_file_get_ioc(file);
  50
  51    if (ioc) {
  52        /*
  53         * For migration qemufiles, we'll always reach here.  Though we'll skip
  54         * calls from e.g. savevm/loadvm as they don't use yank.
  55         */
  56        migration_ioc_unregister_yank(ioc);
  57    }
  58}
  59