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 Error *local_err = NULL; 34 35 trace_migration_set_incoming_channel( 36 ioc, object_get_typename(OBJECT(ioc))); 37 38 if (s->parameters.tls_creds && 39 *s->parameters.tls_creds && 40 !object_dynamic_cast(OBJECT(ioc), 41 TYPE_QIO_CHANNEL_TLS)) { 42 migration_tls_channel_process_incoming(s, ioc, &local_err); 43 } else { 44 migration_ioc_process_incoming(ioc, &local_err); 45 } 46 47 if (local_err) { 48 error_report_err(local_err); 49 } 50 } 51 52 53 /** 54 * @migration_channel_connect - Create new outgoing migration channel 55 * 56 * @s: Current migration state 57 * @ioc: Channel to which we are connecting 58 * @hostname: Where we want to connect 59 * @error: Error indicating failure to connect, free'd here 60 */ 61 void migration_channel_connect(MigrationState *s, 62 QIOChannel *ioc, 63 const char *hostname, 64 Error *error) 65 { 66 trace_migration_set_outgoing_channel( 67 ioc, object_get_typename(OBJECT(ioc)), hostname, error); 68 69 if (!error) { 70 if (s->parameters.tls_creds && 71 *s->parameters.tls_creds && 72 !object_dynamic_cast(OBJECT(ioc), 73 TYPE_QIO_CHANNEL_TLS)) { 74 migration_tls_channel_connect(s, ioc, hostname, &error); 75 76 if (!error) { 77 /* tls_channel_connect will call back to this 78 * function after the TLS handshake, 79 * so we mustn't call migrate_fd_connect until then 80 */ 81 82 return; 83 } 84 } else { 85 QEMUFile *f = qemu_fopen_channel_output(ioc); 86 87 qemu_mutex_lock(&s->qemu_file_lock); 88 s->to_dst_file = f; 89 qemu_mutex_unlock(&s->qemu_file_lock); 90 } 91 } 92 migrate_fd_connect(s, error); 93 error_free(error); 94 } 95