Merge tag 'ide-pull-request' of https://gitlab.com/jsnow/qemu into staging
[qemu.git] / migration / socket.c
1 /*
2 * QEMU live migration via socket
3 *
4 * Copyright Red Hat, Inc. 2009-2016
5 *
6 * Authors:
7 * Chris Lalancette <clalance@redhat.com>
8 * Daniel P. Berrange <berrange@redhat.com>
9 *
10 * This work is licensed under the terms of the GNU GPL, version 2. See
11 * the COPYING file in the top-level directory.
12 *
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.
15 */
16
17 #include "qemu/osdep.h"
18 #include "qemu/cutils.h"
19
20 #include "qemu/error-report.h"
21 #include "qapi/error.h"
22 #include "channel.h"
23 #include "socket.h"
24 #include "migration.h"
25 #include "qemu-file.h"
26 #include "io/channel-socket.h"
27 #include "io/net-listener.h"
28 #include "trace.h"
29
30
31 struct SocketOutgoingArgs {
32 SocketAddress *saddr;
33 } outgoing_args;
34
35 void socket_send_channel_create(QIOTaskFunc f, void *data)
36 {
37 QIOChannelSocket *sioc = qio_channel_socket_new();
38 qio_channel_socket_connect_async(sioc, outgoing_args.saddr,
39 f, data, NULL, NULL);
40 }
41
42 int socket_send_channel_destroy(QIOChannel *send)
43 {
44 /* Remove channel */
45 object_unref(OBJECT(send));
46 if (outgoing_args.saddr) {
47 qapi_free_SocketAddress(outgoing_args.saddr);
48 outgoing_args.saddr = NULL;
49 }
50 return 0;
51 }
52
53 struct SocketConnectData {
54 MigrationState *s;
55 char *hostname;
56 };
57
58 static void socket_connect_data_free(void *opaque)
59 {
60 struct SocketConnectData *data = opaque;
61 if (!data) {
62 return;
63 }
64 g_free(data->hostname);
65 g_free(data);
66 }
67
68 static void socket_outgoing_migration(QIOTask *task,
69 gpointer opaque)
70 {
71 struct SocketConnectData *data = opaque;
72 QIOChannel *sioc = QIO_CHANNEL(qio_task_get_source(task));
73 Error *err = NULL;
74
75 if (qio_task_propagate_error(task, &err)) {
76 trace_migration_socket_outgoing_error(error_get_pretty(err));
77 } else {
78 trace_migration_socket_outgoing_connected(data->hostname);
79 }
80 migration_channel_connect(data->s, sioc, data->hostname, err);
81 object_unref(OBJECT(sioc));
82 }
83
84 static void
85 socket_start_outgoing_migration_internal(MigrationState *s,
86 SocketAddress *saddr,
87 Error **errp)
88 {
89 QIOChannelSocket *sioc = qio_channel_socket_new();
90 struct SocketConnectData *data = g_new0(struct SocketConnectData, 1);
91
92 data->s = s;
93
94 /* in case previous migration leaked it */
95 qapi_free_SocketAddress(outgoing_args.saddr);
96 outgoing_args.saddr = saddr;
97
98 if (saddr->type == SOCKET_ADDRESS_TYPE_INET) {
99 data->hostname = g_strdup(saddr->u.inet.host);
100 }
101
102 qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-outgoing");
103 qio_channel_socket_connect_async(sioc,
104 saddr,
105 socket_outgoing_migration,
106 data,
107 socket_connect_data_free,
108 NULL);
109 }
110
111 void socket_start_outgoing_migration(MigrationState *s,
112 const char *str,
113 Error **errp)
114 {
115 Error *err = NULL;
116 SocketAddress *saddr = socket_parse(str, &err);
117 if (!err) {
118 socket_start_outgoing_migration_internal(s, saddr, &err);
119 }
120 error_propagate(errp, err);
121 }
122
123 static void socket_accept_incoming_migration(QIONetListener *listener,
124 QIOChannelSocket *cioc,
125 gpointer opaque)
126 {
127 trace_migration_socket_incoming_accepted();
128
129 if (migration_has_all_channels()) {
130 error_report("%s: Extra incoming migration connection; ignoring",
131 __func__);
132 return;
133 }
134
135 qio_channel_set_name(QIO_CHANNEL(cioc), "migration-socket-incoming");
136 migration_channel_process_incoming(QIO_CHANNEL(cioc));
137 }
138
139 static void
140 socket_incoming_migration_end(void *opaque)
141 {
142 QIONetListener *listener = opaque;
143
144 qio_net_listener_disconnect(listener);
145 object_unref(OBJECT(listener));
146 }
147
148 static void
149 socket_start_incoming_migration_internal(SocketAddress *saddr,
150 Error **errp)
151 {
152 QIONetListener *listener = qio_net_listener_new();
153 MigrationIncomingState *mis = migration_incoming_get_current();
154 size_t i;
155 int num = 1;
156
157 qio_net_listener_set_name(listener, "migration-socket-listener");
158
159 if (migrate_use_multifd()) {
160 num = migrate_multifd_channels();
161 }
162
163 if (qio_net_listener_open_sync(listener, saddr, num, errp) < 0) {
164 object_unref(OBJECT(listener));
165 return;
166 }
167
168 mis->transport_data = listener;
169 mis->transport_cleanup = socket_incoming_migration_end;
170
171 qio_net_listener_set_client_func_full(listener,
172 socket_accept_incoming_migration,
173 NULL, NULL,
174 g_main_context_get_thread_default());
175
176 for (i = 0; i < listener->nsioc; i++) {
177 SocketAddress *address =
178 qio_channel_socket_get_local_address(listener->sioc[i], errp);
179 if (!address) {
180 return;
181 }
182 migrate_add_address(address);
183 qapi_free_SocketAddress(address);
184 }
185 }
186
187 void socket_start_incoming_migration(const char *str, Error **errp)
188 {
189 Error *err = NULL;
190 SocketAddress *saddr = socket_parse(str, &err);
191 if (!err) {
192 socket_start_incoming_migration_internal(saddr, &err);
193 }
194 qapi_free_SocketAddress(saddr);
195 error_propagate(errp, err);
196 }