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 31 const 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 43 void 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 62 static 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 71 void 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