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 "qapi/error.h"
  22 #include "qemu-common.h"
  23 #include "migration/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_WRONLY,
  36                                                     errp));
  37     if (!ioc) {
  38         return;
  39     }
  40
  41     migration_set_outgoing_channel(s, ioc, NULL);
  42     object_unref(OBJECT(ioc));
  43 }
  44
  45 static gboolean exec_accept_incoming_migration(QIOChannel *ioc,
  46                                                GIOCondition condition,
  47                                                gpointer opaque)
  48 {
  49     migration_set_incoming_channel(migrate_get_current(), ioc);
  50     object_unref(OBJECT(ioc));
  51     return FALSE; /* unregister */
  52 }
  53
  54 void exec_start_incoming_migration(const char *command, Error **errp)
  55 {
  56     QIOChannel *ioc;
  57     const char *argv[] = { "/bin/sh", "-c", command, NULL };
  58
  59     trace_migration_exec_incoming(command);
  60     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv,
  61                                                     O_RDONLY,
  62                                                     errp));
  63     if (!ioc) {
  64         return;
  65     }
  66
  67     qio_channel_add_watch(ioc,
  68                           G_IO_IN,
  69                           exec_accept_incoming_migration,
  70                           NULL,
  71                           NULL);
  72 }