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 "qemu/error-report.h" 22 #include "channel.h" 23 #include "exec.h" 24 #include "migration.h" 25 #include "io/channel-command.h" 26 #include "trace.h" 27 #include "qemu/cutils.h" 28 29 #ifdef WIN32 30 const char *exec_get_cmd_path(void); 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, const char *command, Error **errp) 44 { 45 QIOChannel *ioc; 46 47 #ifdef WIN32 48 const char *argv[] = { exec_get_cmd_path(), "/c", command, NULL }; 49 #else 50 const char *argv[] = { "/bin/sh", "-c", command, NULL }; 51 #endif 52 53 trace_migration_exec_outgoing(command); 54 ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv, 55 O_RDWR, 56 errp)); 57 if (!ioc) { 58 return; 59 } 60 61 qio_channel_set_name(ioc, "migration-exec-outgoing"); 62 migration_channel_connect(s, ioc, NULL, NULL); 63 object_unref(OBJECT(ioc)); 64 } 65 66 static gboolean exec_accept_incoming_migration(QIOChannel *ioc, 67 GIOCondition condition, 68 gpointer opaque) 69 { 70 migration_channel_process_incoming(ioc); 71 object_unref(OBJECT(ioc)); 72 return G_SOURCE_REMOVE; 73 } 74 75 void exec_start_incoming_migration(const char *command, Error **errp) 76 { 77 QIOChannel *ioc; 78 79 #ifdef WIN32 80 const char *argv[] = { exec_get_cmd_path(), "/c", command, NULL }; 81 #else 82 const char *argv[] = { "/bin/sh", "-c", command, NULL }; 83 #endif 84 85 trace_migration_exec_incoming(command); 86 ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv, 87 O_RDWR, 88 errp)); 89 if (!ioc) { 90 return; 91 } 92 93 qio_channel_set_name(ioc, "migration-exec-incoming"); 94 qio_channel_add_watch_full(ioc, G_IO_IN, 95 exec_accept_incoming_migration, 96 NULL, NULL, 97 g_main_context_get_thread_default()); 98 } 99