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 22 /** 23 * @migration_channel_process_incoming - Create new incoming migration channel 24 * 25 * Notice that TLS is special. For it we listen in a listener socket, 26 * and then create a new client socket from the TLS library. 27 * 28 * @ioc: Channel to which we are connecting 29 */ 30 void migration_channel_process_incoming(QIOChannel *ioc) 31 { 32 MigrationState *s = migrate_get_current(); 33 34 trace_migration_set_incoming_channel( 35 ioc, object_get_typename(OBJECT(ioc))); 36 37 if (s->parameters.tls_creds && 38 *s->parameters.tls_creds && 39 !object_dynamic_cast(OBJECT(ioc), 40 TYPE_QIO_CHANNEL_TLS)) { 41 Error *local_err = NULL; 42 migration_tls_channel_process_incoming(s, ioc, &local_err); 43 if (local_err) { 44 error_report_err(local_err); 45 } 46 } else { 47 migration_ioc_process_incoming(ioc); 48 } 49 } 50 51 52 /** 53 * @migration_channel_connect - Create new outgoing migration channel 54 * 55 * @s: Current migration state 56 * @ioc: Channel to which we are connecting 57 * @hostname: Where we want to connect 58 * @error: Error indicating failure to connect, free'd here 59 */ 60 void migration_channel_connect(MigrationState *s, 61 QIOChannel *ioc, 62 const char *hostname, 63 Error *error) 64 { 65 trace_migration_set_outgoing_channel( 66 ioc, object_get_typename(OBJECT(ioc)), hostname, error); 67 68 if (!error) { 69 if (s->parameters.tls_creds && 70 *s->parameters.tls_creds && 71 !object_dynamic_cast(OBJECT(ioc), 72 TYPE_QIO_CHANNEL_TLS)) { 73 migration_tls_channel_connect(s, ioc, hostname, &error); 74 75 if (!error) { 76 /* tls_channel_connect will call back to this 77 * function after the TLS handshake, 78 * so we mustn't call migrate_fd_connect until then 79 */ 80 81 return; 82 } 83 } else { 84 QEMUFile *f = qemu_fopen_channel_output(ioc); 85 86 qemu_mutex_lock(&s->qemu_file_lock); 87 s->to_dst_file = f; 88 qemu_mutex_unlock(&s->qemu_file_lock); 89 } 90 } 91 migrate_fd_connect(s, error); 92 error_free(error); 93 } 94