1 /* 2 * QEMU live migration via generic fd 3 * 4 * Copyright Red Hat, Inc. 2009-2016 5 * 6 * Authors: 7 * Chris Lalancette <clalance@redhat.com> 8 * Daniel P. Berrange <berrange@redhat.com> 9 * 10 * This work is licensed under the terms of the GNU GPL, version 2. See 11 * the COPYING file in the top-level directory. 12 * 13 * Contributions after 2012-01-13 are licensed under the terms of the 14 * GNU GPL, version 2 or (at your option) any later version. 15 */ 16 17 #include "qemu/osdep.h" 18 #include "channel.h" 19 #include "fd.h" 20 #include "file.h" 21 #include "migration.h" 22 #include "monitor/monitor.h" 23 #include "qemu/error-report.h" 24 #include "qemu/sockets.h" 25 #include "io/channel-util.h" 26 #include "trace.h" 27 28 29 void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp) 30 { 31 QIOChannel *ioc; 32 int fd = monitor_get_fd(monitor_cur(), fdname, errp); 33 if (fd == -1) { 34 return; 35 } 36 37 if (!fd_is_socket(fd)) { 38 warn_report("fd: migration to a file is deprecated." 39 " Use file: instead."); 40 } 41 42 trace_migration_fd_outgoing(fd); 43 ioc = qio_channel_new_fd(fd, errp); 44 if (!ioc) { 45 close(fd); 46 return; 47 } 48 49 qio_channel_set_name(ioc, "migration-fd-outgoing"); 50 migration_channel_connect(s, ioc, NULL, NULL); 51 object_unref(OBJECT(ioc)); 52 } 53 54 static gboolean fd_accept_incoming_migration(QIOChannel *ioc, 55 GIOCondition condition, 56 gpointer opaque) 57 { 58 migration_channel_process_incoming(ioc); 59 object_unref(OBJECT(ioc)); 60 return G_SOURCE_REMOVE; 61 } 62 63 void fd_start_incoming_migration(const char *fdname, Error **errp) 64 { 65 QIOChannel *ioc; 66 int fd = monitor_fd_param(monitor_cur(), fdname, errp); 67 if (fd == -1) { 68 return; 69 } 70 71 if (!fd_is_socket(fd)) { 72 warn_report("fd: migration to a file is deprecated." 73 " Use file: instead."); 74 } 75 76 trace_migration_fd_incoming(fd); 77 78 ioc = qio_channel_new_fd(fd, errp); 79 if (!ioc) { 80 close(fd); 81 return; 82 } 83 84 qio_channel_set_name(ioc, "migration-fd-incoming"); 85 qio_channel_add_watch_full(ioc, G_IO_IN, 86 fd_accept_incoming_migration, 87 NULL, NULL, 88 g_main_context_get_thread_default()); 89 } 90