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 "channel.h"
  24 #include "migration/migration.h"
  25 #include "io/channel-command.h"
  26 #include "trace.h"
  27
  28
  29 void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp)
  30 {
  31     QIOChannel *ioc;
  32     const char *argv[] = { "/bin/sh", "-c", command, NULL };
  33
  34     trace_migration_exec_outgoing(command);
  35     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv,
  36                                                     O_RDWR,
  37                                                     errp));
  38     if (!ioc) {
  39         return;
  40     }
  41
  42     qio_channel_set_name(ioc, "migration-exec-outgoing");
  43     migration_channel_connect(s, ioc, NULL);
  44     object_unref(OBJECT(ioc));
  45 }
  46
  47 static gboolean exec_accept_incoming_migration(QIOChannel *ioc,
  48                                                GIOCondition condition,
  49                                                gpointer opaque)
  50 {
  51     migration_channel_process_incoming(migrate_get_current(), ioc);
  52     object_unref(OBJECT(ioc));
  53     return FALSE; /* unregister */
  54 }
  55
  56 void exec_start_incoming_migration(const char *command, Error **errp)
  57 {
  58     QIOChannel *ioc;
  59     const char *argv[] = { "/bin/sh", "-c", command, NULL };
  60
  61     trace_migration_exec_incoming(command);
  62     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv,
  63                                                     O_RDWR,
  64                                                     errp));
  65     if (!ioc) {
  66         return;
  67     }
  68
  69     qio_channel_set_name(ioc, "migration-exec-incoming");
  70     qio_channel_add_watch(ioc,
  71                           G_IO_IN,
  72                           exec_accept_incoming_migration,
  73                           NULL,
  74                           NULL);
  75 }