LXR qemu/migration/fd.c

   1/*
   2 * QEMU live migration via generic fd
   3 *
   4 * Copyright Red Hat, Inc. 2009-2016
   5 *
   6 * Authors:
   7 *  Chris Lalancette <clalance@redhat.com>
   8 *  Daniel P. Berrange <berrange@redhat.com>
   9 *
  10 * This work is licensed under the terms of the GNU GPL, version 2.  See
  11 * the COPYING file in the top-level directory.
  12 *
  13 * Contributions after 2012-01-13 are licensed under the terms of the
  14 * GNU GPL, version 2 or (at your option) any later version.
  15 */
  16
  17#include "qemu/osdep.h"
  18#include "channel.h"
  19#include "fd.h"
  20#include "migration.h"
  21#include "monitor/monitor.h"
  22#include "io/channel-util.h"
  23#include "trace.h"
  24
  25
  26void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
  27{
  28    QIOChannel *ioc;
  29    int fd = monitor_get_fd(monitor_cur(), fdname, errp);
  30    if (fd == -1) {
  31        return;
  32    }
  33
  34    trace_migration_fd_outgoing(fd);
  35    ioc = qio_channel_new_fd(fd, errp);
  36    if (!ioc) {
  37        close(fd);
  38        return;
  39    }
  40
  41    qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-outgoing");
  42    migration_channel_connect(s, ioc, NULL, NULL);
  43    object_unref(OBJECT(ioc));
  44}
  45
  46static gboolean fd_accept_incoming_migration(QIOChannel *ioc,
  47                                             GIOCondition condition,
  48                                             gpointer opaque)
  49{
  50    migration_channel_process_incoming(ioc);
  51    object_unref(OBJECT(ioc));
  52    return G_SOURCE_REMOVE;
  53}
  54
  55void fd_start_incoming_migration(const char *fdname, Error **errp)
  56{
  57    QIOChannel *ioc;
  58    int fd = monitor_fd_param(monitor_cur(), fdname, errp);
  59    if (fd == -1) {
  60        return;
  61    }
  62
  63    trace_migration_fd_incoming(fd);
  64
  65    ioc = qio_channel_new_fd(fd, errp);
  66    if (!ioc) {
  67        close(fd);
  68        return;
  69    }
  70
  71    qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-incoming");
  72    qio_channel_add_watch_full(ioc, G_IO_IN,
  73                               fd_accept_incoming_migration,
  74                               NULL, NULL,
  75                               g_main_context_get_thread_default());
  76}
  77