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 "monitor/monitor.h" 21 #include "io/channel-util.h" 22 #include "trace.h" 23 24 25 void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp) 26 { 27 QIOChannel *ioc; 28 int fd = monitor_get_fd(cur_mon, fdname, errp); 29 if (fd == -1) { 30 return; 31 } 32 33 trace_migration_fd_outgoing(fd); 34 ioc = qio_channel_new_fd(fd, errp); 35 if (!ioc) { 36 close(fd); 37 return; 38 } 39 40 qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-outgoing"); 41 migration_channel_connect(s, ioc, NULL, NULL); 42 object_unref(OBJECT(ioc)); 43 } 44 45 static gboolean fd_accept_incoming_migration(QIOChannel *ioc, 46 GIOCondition condition, 47 gpointer opaque) 48 { 49 migration_channel_process_incoming(ioc); 50 object_unref(OBJECT(ioc)); 51 return G_SOURCE_REMOVE; 52 } 53 54 void fd_start_incoming_migration(const char *infd, Error **errp) 55 { 56 QIOChannel *ioc; 57 int fd; 58 59 fd = strtol(infd, NULL, 0); 60 trace_migration_fd_incoming(fd); 61 62 ioc = qio_channel_new_fd(fd, errp); 63 if (!ioc) { 64 close(fd); 65 return; 66 } 67 68 qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-incoming"); 69 qio_channel_add_watch(ioc, 70 G_IO_IN, 71 fd_accept_incoming_migration, 72 NULL, 73 NULL); 74 } 75