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 "monitor/monitor.h"
  21#include "io/channel-util.h"
  22#include "trace.h"
  23
  24
  25void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
  26{
  27    QIOChannel *ioc;
  28    int fd = monitor_get_fd(cur_mon, fdname, errp);
  29    if (fd == -1) {
  30        return;
  31    }
  32
  33    trace_migration_fd_outgoing(fd);
  34    ioc = qio_channel_new_fd(fd, errp);
  35    if (!ioc) {
  36        close(fd);
  37        return;
  38    }
  39
  40    qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-outgoing");
  41    migration_channel_connect(s, ioc, NULL, NULL);
  42    object_unref(OBJECT(ioc));
  43}
  44
  45static gboolean fd_accept_incoming_migration(QIOChannel *ioc,
  46                                             GIOCondition condition,
  47                                             gpointer opaque)
  48{
  49    migration_channel_process_incoming(ioc);
  50    object_unref(OBJECT(ioc));
  51    return G_SOURCE_REMOVE;
  52}
  53
  54void fd_start_incoming_migration(const char *infd, Error **errp)
  55{
  56    QIOChannel *ioc;
  57    int fd;
  58
  59    fd = strtol(infd, NULL, 0);
  60    trace_migration_fd_incoming(fd);
  61
  62    ioc = qio_channel_new_fd(fd, errp);
  63    if (!ioc) {
  64        close(fd);
  65        return;
  66    }
  67
  68    qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-incoming");
  69    qio_channel_add_watch(ioc,
  70                          G_IO_IN,
  71                          fd_accept_incoming_migration,
  72                          NULL,
  73                          NULL);
  74}
  75