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 (migrate_use_tls() && 42 !object_dynamic_cast(OBJECT(ioc), 43 TYPE_QIO_CHANNEL_TLS)) { 44 migration_tls_channel_process_incoming(s, ioc, &local_err); 45 } else { 46 migration_ioc_register_yank(ioc); 47 migration_ioc_process_incoming(ioc, &local_err); 48 } 49 50 if (local_err) { 51 error_report_err(local_err); 52 } 53 } 54 55 56 /** 57 * @migration_channel_connect - Create new outgoing migration channel 58 * 59 * @s: Current migration state 60 * @ioc: Channel to which we are connecting 61 * @hostname: Where we want to connect 62 * @error: Error indicating failure to connect, free'd here 63 */ 64 void migration_channel_connect(MigrationState *s, 65 QIOChannel *ioc, 66 const char *hostname, 67 Error *error) 68 { 69 trace_migration_set_outgoing_channel( 70 ioc, object_get_typename(OBJECT(ioc)), hostname, error); 71 72 if (!error) { 73 if (s->parameters.tls_creds && 74 *s->parameters.tls_creds && 75 !object_dynamic_cast(OBJECT(ioc), 76 TYPE_QIO_CHANNEL_TLS)) { 77 migration_tls_channel_connect(s, ioc, hostname, &error); 78 79 if (!error) { 80 /* tls_channel_connect will call back to this 81 * function after the TLS handshake, 82 * so we mustn't call migrate_fd_connect until then 83 */ 84 85 return; 86 } 87 } else { 88 QEMUFile *f = qemu_fopen_channel_output(ioc); 89 90 migration_ioc_register_yank(ioc); 91 92 qemu_mutex_lock(&s->qemu_file_lock); 93 s->to_dst_file = f; 94 qemu_mutex_unlock(&s->qemu_file_lock); 95 } 96 } 97 migrate_fd_connect(s, error); 98 error_free(error); 99 } 100