LXR qemu/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/type-helpers.h"
  22#include "qemu/error-report.h"
  23#include "channel.h"
  24#include "exec.h"
  25#include "migration.h"
  26#include "io/channel-command.h"
  27#include "trace.h"
  28#include "qemu/cutils.h"
  29
  30#ifdef WIN32
  31const char *exec_get_cmd_path(void)
  32{
  33    g_autofree char *detected_path = g_new(char, MAX_PATH);
  34    if (GetSystemDirectoryA(detected_path, MAX_PATH) == 0) {
  35        warn_report("Could not detect cmd.exe path, using default.");
  36        return "C:\\Windows\\System32\\cmd.exe";
  37    }
  38    pstrcat(detected_path, MAX_PATH, "\\cmd.exe");
  39    return g_steal_pointer(&detected_path);
  40}
  41#endif
  42
  43void exec_start_outgoing_migration(MigrationState *s, strList *command,
  44                                   Error **errp)
  45{
  46    QIOChannel *ioc = NULL;
  47    g_auto(GStrv) argv = strv_from_str_list(command);
  48    const char * const *args = (const char * const *) argv;
  49    g_autofree char *new_command = g_strjoinv(" ", (char **)argv);
  50
  51    trace_migration_exec_outgoing(new_command);
  52    ioc = QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp));
  53    if (!ioc) {
  54        return;
  55    }
  56
  57    qio_channel_set_name(ioc, "migration-exec-outgoing");
  58    migration_channel_connect(s, ioc, NULL, NULL);
  59    object_unref(OBJECT(ioc));
  60}
  61
  62static gboolean exec_accept_incoming_migration(QIOChannel *ioc,
  63                                               GIOCondition condition,
  64                                               gpointer opaque)
  65{
  66    migration_channel_process_incoming(ioc);
  67    object_unref(OBJECT(ioc));
  68    return G_SOURCE_REMOVE;
  69}
  70
  71void exec_start_incoming_migration(strList *command, Error **errp)
  72{
  73    QIOChannel *ioc;
  74    g_auto(GStrv) argv = strv_from_str_list(command);
  75    const char * const *args = (const char * const *) argv;
  76    g_autofree char *new_command = g_strjoinv(" ", (char **)argv);
  77
  78    trace_migration_exec_incoming(new_command);
  79    ioc = QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp));
  80    if (!ioc) {
  81        return;
  82    }
  83
  84    qio_channel_set_name(ioc, "migration-exec-incoming");
  85    qio_channel_add_watch_full(ioc, G_IO_IN,
  86                               exec_accept_incoming_migration,
  87                               NULL, NULL,
  88                               g_main_context_get_thread_default());
  89}
  90