2 * QEMU live migration via socket
4 * Copyright Red Hat, Inc. 2009-2016
7 * Chris Lalancette <clalance@redhat.com>
8 * Daniel P. Berrange <berrange@redhat.com>
10 * This work is licensed under the terms of the GNU GPL, version 2. See
11 * the COPYING file in the top-level directory.
13 * Contributions after 2012-01-13 are licensed under the terms of the
14 * GNU GPL, version 2 or (at your option) any later version.
17 #include "qemu/osdep.h"
18 #include "qemu/cutils.h"
20 #include "qemu/error-report.h"
21 #include "qapi/error.h"
24 #include "migration.h"
25 #include "qemu-file.h"
26 #include "io/channel-socket.h"
27 #include "io/net-listener.h"
31 struct SocketOutgoingArgs {
35 void socket_send_channel_create(QIOTaskFunc f, void *data)
37 QIOChannelSocket *sioc = qio_channel_socket_new();
38 qio_channel_socket_connect_async(sioc, outgoing_args.saddr,
42 int socket_send_channel_destroy(QIOChannel *send)
45 object_unref(OBJECT(send));
46 if (outgoing_args.saddr) {
47 qapi_free_SocketAddress(outgoing_args.saddr);
48 outgoing_args.saddr = NULL;
53 struct SocketConnectData {
58 static void socket_connect_data_free(void *opaque)
60 struct SocketConnectData *data = opaque;
64 g_free(data->hostname);
68 static void socket_outgoing_migration(QIOTask *task,
71 struct SocketConnectData *data = opaque;
72 QIOChannel *sioc = QIO_CHANNEL(qio_task_get_source(task));
75 if (qio_task_propagate_error(task, &err)) {
76 trace_migration_socket_outgoing_error(error_get_pretty(err));
78 trace_migration_socket_outgoing_connected(data->hostname);
80 migration_channel_connect(data->s, sioc, data->hostname, err);
81 object_unref(OBJECT(sioc));
85 socket_start_outgoing_migration_internal(MigrationState *s,
89 QIOChannelSocket *sioc = qio_channel_socket_new();
90 struct SocketConnectData *data = g_new0(struct SocketConnectData, 1);
94 /* in case previous migration leaked it */
95 qapi_free_SocketAddress(outgoing_args.saddr);
96 outgoing_args.saddr = saddr;
98 if (saddr->type == SOCKET_ADDRESS_TYPE_INET) {
99 data->hostname = g_strdup(saddr->u.inet.host);
102 qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-outgoing");
103 qio_channel_socket_connect_async(sioc,
105 socket_outgoing_migration,
107 socket_connect_data_free,
111 void socket_start_outgoing_migration(MigrationState *s,
116 SocketAddress *saddr = socket_parse(str, &err);
118 socket_start_outgoing_migration_internal(s, saddr, &err);
120 error_propagate(errp, err);
123 static void socket_accept_incoming_migration(QIONetListener *listener,
124 QIOChannelSocket *cioc,
127 trace_migration_socket_incoming_accepted();
129 qio_channel_set_name(QIO_CHANNEL(cioc), "migration-socket-incoming");
130 migration_channel_process_incoming(QIO_CHANNEL(cioc));
132 if (migration_has_all_channels()) {
133 /* Close listening socket as its no longer needed */
134 qio_net_listener_disconnect(listener);
135 object_unref(OBJECT(listener));
141 socket_start_incoming_migration_internal(SocketAddress *saddr,
144 QIONetListener *listener = qio_net_listener_new();
148 qio_net_listener_set_name(listener, "migration-socket-listener");
150 if (migrate_use_multifd()) {
151 num = migrate_multifd_channels();
154 if (qio_net_listener_open_sync(listener, saddr, num, errp) < 0) {
155 object_unref(OBJECT(listener));
159 qio_net_listener_set_client_func_full(listener,
160 socket_accept_incoming_migration,
162 g_main_context_get_thread_default());
164 for (i = 0; i < listener->nsioc; i++) {
165 SocketAddress *address =
166 qio_channel_socket_get_local_address(listener->sioc[i], errp);
170 migrate_add_address(address);
171 qapi_free_SocketAddress(address);
175 void socket_start_incoming_migration(const char *str, Error **errp)
178 SocketAddress *saddr = socket_parse(str, &err);
180 socket_start_incoming_migration_internal(saddr, &err);
182 qapi_free_SocketAddress(saddr);
183 error_propagate(errp, err);