LXR qemu/migration/channel.c

   1/*
   2 * QEMU live migration channel operations
   3 *
   4 * Copyright Red Hat, Inc. 2016
   5 *
   6 * Authors:
   7 *  Daniel P. Berrange <berrange@redhat.com>
   8 *
   9 * Contributions after 2012-01-13 are licensed under the terms of the
  10 * GNU GPL, version 2 or (at your option) any later version.
  11 */
  12
  13#include "qemu/osdep.h"
  14#include "channel.h"
  15#include "tls.h"
  16#include "migration.h"
  17#include "qemu-file-channel.h"
  18#include "trace.h"
  19#include "qapi/error.h"
  20#include "io/channel-tls.h"
  21
  22/**
  23 * @migration_channel_process_incoming - Create new incoming migration channel
  24 *
  25 * Notice that TLS is special.  For it we listen in a listener socket,
  26 * and then create a new client socket from the TLS library.
  27 *
  28 * @ioc: Channel to which we are connecting
  29 */
  30void migration_channel_process_incoming(QIOChannel *ioc)
  31{
  32    MigrationState *s = migrate_get_current();
  33
  34    trace_migration_set_incoming_channel(
  35        ioc, object_get_typename(OBJECT(ioc)));
  36
  37    if (s->parameters.tls_creds &&
  38        *s->parameters.tls_creds &&
  39        !object_dynamic_cast(OBJECT(ioc),
  40                             TYPE_QIO_CHANNEL_TLS)) {
  41        Error *local_err = NULL;
  42        migration_tls_channel_process_incoming(s, ioc, &local_err);
  43        if (local_err) {
  44            error_report_err(local_err);
  45        }
  46    } else {
  47        migration_ioc_process_incoming(ioc);
  48    }
  49}
  50
  51
  52/**
  53 * @migration_channel_connect - Create new outgoing migration channel
  54 *
  55 * @s: Current migration state
  56 * @ioc: Channel to which we are connecting
  57 * @hostname: Where we want to connect
  58 * @error: Error indicating failure to connect, free'd here
  59 */
  60void migration_channel_connect(MigrationState *s,
  61                               QIOChannel *ioc,
  62                               const char *hostname,
  63                               Error *error)
  64{
  65    trace_migration_set_outgoing_channel(
  66        ioc, object_get_typename(OBJECT(ioc)), hostname, error);
  67
  68    if (!error) {
  69        if (s->parameters.tls_creds &&
  70            *s->parameters.tls_creds &&
  71            !object_dynamic_cast(OBJECT(ioc),
  72                                 TYPE_QIO_CHANNEL_TLS)) {
  73            migration_tls_channel_connect(s, ioc, hostname, &error);
  74        } else {
  75            QEMUFile *f = qemu_fopen_channel_output(ioc);
  76
  77            s->to_dst_file = f;
  78
  79        }
  80    }
  81    migrate_fd_connect(s, error);
  82    error_free(error);
  83}
  84