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 "channel.h" 22 #include "exec.h" 23 #include "migration.h" 24 #include "io/channel-command.h" 25 #include "trace.h" 26 #include "qemu/cutils.h" 27 28 #ifdef WIN32 29 const char *exec_get_cmd_path(void); 30 const char *exec_get_cmd_path(void) 31 { 32 g_autofree char *detected_path = g_new(char, MAX_PATH); 33 if (GetSystemDirectoryA(detected_path, MAX_PATH) == 0) { 34 warn_report("Could not detect cmd.exe path, using default."); 35 return "C:\\Windows\\System32\\cmd.exe"; 36 } 37 pstrcat(detected_path, MAX_PATH, "\\cmd.exe"); 38 return g_steal_pointer(&detected_path); 39 } 40 #endif 41 42 void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp) 43 { 44 QIOChannel *ioc; 45 46 #ifdef WIN32 47 const char *argv[] = { exec_get_cmd_path(), "/c", command, NULL }; 48 #else 49 const char *argv[] = { "/bin/sh", "-c", command, NULL }; 50 #endif 51 52 trace_migration_exec_outgoing(command); 53 ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv, 54 O_RDWR, 55 errp)); 56 if (!ioc) { 57 return; 58 } 59 60 qio_channel_set_name(ioc, "migration-exec-outgoing"); 61 migration_channel_connect(s, ioc, NULL, NULL); 62 object_unref(OBJECT(ioc)); 63 } 64 65 static gboolean exec_accept_incoming_migration(QIOChannel *ioc, 66 GIOCondition condition, 67 gpointer opaque) 68 { 69 migration_channel_process_incoming(ioc); 70 object_unref(OBJECT(ioc)); 71 return G_SOURCE_REMOVE; 72 } 73 74 void exec_start_incoming_migration(const char *command, Error **errp) 75 { 76 QIOChannel *ioc; 77 78 #ifdef WIN32 79 const char *argv[] = { exec_get_cmd_path(), "/c", command, NULL }; 80 #else 81 const char *argv[] = { "/bin/sh", "-c", command, NULL }; 82 #endif 83 84 trace_migration_exec_incoming(command); 85 ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv, 86 O_RDWR, 87 errp)); 88 if (!ioc) { 89 return; 90 } 91 92 qio_channel_set_name(ioc, "migration-exec-incoming"); 93 qio_channel_add_watch_full(ioc, G_IO_IN, 94 exec_accept_incoming_migration, 95 NULL, NULL, 96 g_main_context_get_thread_default()); 97 } 98