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