migration/exec.c

   1 /*
   2  * QEMU live migration
   3  *
   4  * Copyright IBM, Corp. 2008
   5  * Copyright Dell MessageOne 2008
   6  * Copyright Red Hat, Inc. 2015-2016
   7  *
   8  * Authors:
   9  *  Anthony Liguori   <aliguori@us.ibm.com>
  10  *  Charles Duffy     <charles_duffy@messageone.com>
  11  *  Daniel P. Berrange <berrange@redhat.com>
  12  *
  13  * This work is licensed under the terms of the GNU GPL, version 2.  See
  14  * the COPYING file in the top-level directory.
  15  *
  16  * Contributions after 2012-01-13 are licensed under the terms of the
  17  * GNU GPL, version 2 or (at your option) any later version.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "channel.h"
  22 #include "exec.h"
  23 #include "migration.h"
  24 #include "io/channel-command.h"
  25 #include "trace.h"
  26
  27
  28 void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp)
  29 {
  30     QIOChannel *ioc;
  31     const char *argv[] = { "/bin/sh", "-c", command, NULL };
  32
  33     trace_migration_exec_outgoing(command);
  34     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv,
  35                                                     O_RDWR,
  36                                                     errp));
  37     if (!ioc) {
  38         return;
  39     }
  40
  41     qio_channel_set_name(ioc, "migration-exec-outgoing");
  42     migration_channel_connect(s, ioc, NULL, NULL);
  43     object_unref(OBJECT(ioc));
  44 }
  45
  46 static gboolean exec_accept_incoming_migration(QIOChannel *ioc,
  47                                                GIOCondition condition,
  48                                                gpointer opaque)
  49 {
  50     migration_channel_process_incoming(ioc);
  51     object_unref(OBJECT(ioc));
  52     if (!migrate_use_multifd()) {
  53         migration_incoming_process();
  54     }
  55     return G_SOURCE_REMOVE;
  56 }
  57
  58 void exec_start_incoming_migration(const char *command, Error **errp)
  59 {
  60     QIOChannel *ioc;
  61     const char *argv[] = { "/bin/sh", "-c", command, NULL };
  62
  63     trace_migration_exec_incoming(command);
  64     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv,
  65                                                     O_RDWR,
  66                                                     errp));
  67     if (!ioc) {
  68         return;
  69     }
  70
  71     qio_channel_set_name(ioc, "migration-exec-incoming");
  72     qio_channel_add_watch_full(ioc, G_IO_IN,
  73                                exec_accept_incoming_migration,
  74                                NULL, NULL,
  75                                g_main_context_get_thread_default());
  76 }