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 "qapi/error.h" 19 #include "channel.h" 20 #include "fd.h" 21 #include "monitor/monitor.h" 22 #include "io/channel-util.h" 23 #include "trace.h" 24 25 26 void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp) 27 { 28 QIOChannel *ioc; 29 int fd = monitor_get_fd(cur_mon, fdname, errp); 30 if (fd == -1) { 31 return; 32 } 33 34 trace_migration_fd_outgoing(fd); 35 ioc = qio_channel_new_fd(fd, errp); 36 if (!ioc) { 37 close(fd); 38 return; 39 } 40 41 qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-outgoing"); 42 migration_channel_connect(s, ioc, NULL); 43 object_unref(OBJECT(ioc)); 44 } 45 46 static gboolean fd_accept_incoming_migration(QIOChannel *ioc, 47 GIOCondition condition, 48 gpointer opaque) 49 { 50 migration_channel_process_incoming(ioc); 51 object_unref(OBJECT(ioc)); 52 return FALSE; /* unregister */ 53 } 54 55 void fd_start_incoming_migration(const char *infd, Error **errp) 56 { 57 QIOChannel *ioc; 58 int fd; 59 60 fd = strtol(infd, NULL, 0); 61 trace_migration_fd_incoming(fd); 62 63 ioc = qio_channel_new_fd(fd, errp); 64 if (!ioc) { 65 close(fd); 66 return; 67 } 68 69 qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-incoming"); 70 qio_channel_add_watch(ioc, 71 G_IO_IN, 72 fd_accept_incoming_migration, 73 NULL, 74 NULL); 75 } 76