1 /* 2 * QEMU live migration channel operations 3 * 4 * Copyright Red Hat, Inc. 2016 5 * 6 * Authors: 7 * Daniel P. Berrange <berrange@redhat.com> 8 * 9 * Contributions after 2012-01-13 are licensed under the terms of the 10 * GNU GPL, version 2 or (at your option) any later version. 11 */ 12 13 #include "qemu/osdep.h" 14 #include "channel.h" 15 #include "tls.h" 16 #include "migration.h" 17 #include "qemu-file-channel.h" 18 #include "trace.h" 19 #include "qapi/error.h" 20 #include "io/channel-tls.h" 21 #include "io/channel-socket.h" 22 #include "qemu/yank.h" 23 #include "yank_functions.h" 24 25 /** 26 * @migration_channel_process_incoming - Create new incoming migration channel 27 * 28 * Notice that TLS is special. For it we listen in a listener socket, 29 * and then create a new client socket from the TLS library. 30 * 31 * @ioc: Channel to which we are connecting 32 */ 33 void migration_channel_process_incoming(QIOChannel *ioc) 34 { 35 MigrationState *s = migrate_get_current(); 36 Error *local_err = NULL; 37 38 trace_migration_set_incoming_channel( 39 ioc, object_get_typename(OBJECT(ioc))); 40 41 if (object_dynamic_cast(OBJECT(ioc), TYPE_QIO_CHANNEL_SOCKET)) { 42 yank_register_function(MIGRATION_YANK_INSTANCE, 43 migration_yank_iochannel, 44 QIO_CHANNEL(ioc)); 45 } 46 47 if (s->parameters.tls_creds && 48 *s->parameters.tls_creds && 49 !object_dynamic_cast(OBJECT(ioc), 50 TYPE_QIO_CHANNEL_TLS)) { 51 migration_tls_channel_process_incoming(s, ioc, &local_err); 52 } else { 53 migration_ioc_process_incoming(ioc, &local_err); 54 } 55 56 if (local_err) { 57 error_report_err(local_err); 58 } 59 } 60 61 62 /** 63 * @migration_channel_connect - Create new outgoing migration channel 64 * 65 * @s: Current migration state 66 * @ioc: Channel to which we are connecting 67 * @hostname: Where we want to connect 68 * @error: Error indicating failure to connect, free'd here 69 */ 70 void migration_channel_connect(MigrationState *s, 71 QIOChannel *ioc, 72 const char *hostname, 73 Error *error) 74 { 75 trace_migration_set_outgoing_channel( 76 ioc, object_get_typename(OBJECT(ioc)), hostname, error); 77 78 if (!error) { 79 if (object_dynamic_cast(OBJECT(ioc), TYPE_QIO_CHANNEL_SOCKET)) { 80 yank_register_function(MIGRATION_YANK_INSTANCE, 81 migration_yank_iochannel, 82 QIO_CHANNEL(ioc)); 83 } 84 85 if (s->parameters.tls_creds && 86 *s->parameters.tls_creds && 87 !object_dynamic_cast(OBJECT(ioc), 88 TYPE_QIO_CHANNEL_TLS)) { 89 migration_tls_channel_connect(s, ioc, hostname, &error); 90 91 if (!error) { 92 /* tls_channel_connect will call back to this 93 * function after the TLS handshake, 94 * so we mustn't call migrate_fd_connect until then 95 */ 96 97 return; 98 } 99 } else { 100 QEMUFile *f = qemu_fopen_channel_output(ioc); 101 102 qemu_mutex_lock(&s->qemu_file_lock); 103 s->to_dst_file = f; 104 qemu_mutex_unlock(&s->qemu_file_lock); 105 } 106 } 107 migrate_fd_connect(s, error); 108 g_free(s->hostname); 109 error_free(error); 110 } 111