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 "qemu-common.h" 20 #include "channel.h" 21 #include "fd.h" 22 #include "migration/migration.h" 23 #include "monitor/monitor.h" 24 #include "io/channel-util.h" 25 #include "trace.h" 26 27 28 void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp) 29 { 30 QIOChannel *ioc; 31 int fd = monitor_get_fd(cur_mon, fdname, errp); 32 if (fd == -1) { 33 return; 34 } 35 36 trace_migration_fd_outgoing(fd); 37 ioc = qio_channel_new_fd(fd, errp); 38 if (!ioc) { 39 close(fd); 40 return; 41 } 42 43 qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-outgoing"); 44 migration_channel_connect(s, ioc, NULL); 45 object_unref(OBJECT(ioc)); 46 } 47 48 static gboolean fd_accept_incoming_migration(QIOChannel *ioc, 49 GIOCondition condition, 50 gpointer opaque) 51 { 52 migration_channel_process_incoming(migrate_get_current(), ioc); 53 object_unref(OBJECT(ioc)); 54 return FALSE; /* unregister */ 55 } 56 57 void fd_start_incoming_migration(const char *infd, Error **errp) 58 { 59 QIOChannel *ioc; 60 int fd; 61 62 fd = strtol(infd, NULL, 0); 63 trace_migration_fd_incoming(fd); 64 65 ioc = qio_channel_new_fd(fd, errp); 66 if (!ioc) { 67 close(fd); 68 return; 69 } 70 71 qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-incoming"); 72 qio_channel_add_watch(ioc, 73 G_IO_IN, 74 fd_accept_incoming_migration, 75 NULL, 76 NULL); 77 } 78