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Commit | Line | Data |
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4951f65b | 1 | /* |
474c624d | 2 | * QEMU live migration via socket |
4951f65b | 3 | * |
d984464e | 4 | * Copyright Red Hat, Inc. 2009-2016 |
4951f65b CL |
5 | * |
6 | * Authors: | |
7 | * Chris Lalancette <clalance@redhat.com> | |
d984464e | 8 | * Daniel P. Berrange <berrange@redhat.com> |
4951f65b CL |
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 | * | |
6b620ca3 PB |
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. | |
4951f65b CL |
15 | */ |
16 | ||
1393a485 | 17 | #include "qemu/osdep.h" |
d99598cc | 18 | |
4951f65b | 19 | #include "qemu-common.h" |
d99598cc | 20 | #include "qemu/error-report.h" |
d984464e | 21 | #include "qapi/error.h" |
caf71f86 | 22 | #include "migration/migration.h" |
557ec5a0 | 23 | #include "migration/qemu-file.h" |
d984464e DB |
24 | #include "io/channel-socket.h" |
25 | #include "trace.h" | |
4951f65b | 26 | |
4951f65b | 27 | |
e65c67e4 DB |
28 | static SocketAddress *tcp_build_address(const char *host_port, Error **errp) |
29 | { | |
30 | InetSocketAddress *iaddr = inet_parse(host_port, errp); | |
31 | SocketAddress *saddr; | |
32 | ||
33 | if (!iaddr) { | |
34 | return NULL; | |
35 | } | |
36 | ||
37 | saddr = g_new0(SocketAddress, 1); | |
38 | saddr->type = SOCKET_ADDRESS_KIND_INET; | |
39 | saddr->u.inet.data = iaddr; | |
40 | ||
41 | return saddr; | |
42 | } | |
43 | ||
44 | ||
d984464e DB |
45 | static SocketAddress *unix_build_address(const char *path) |
46 | { | |
47 | SocketAddress *saddr; | |
48 | ||
49 | saddr = g_new0(SocketAddress, 1); | |
50 | saddr->type = SOCKET_ADDRESS_KIND_UNIX; | |
51 | saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1); | |
52 | saddr->u.q_unix.data->path = g_strdup(path); | |
53 | ||
54 | return saddr; | |
55 | } | |
4951f65b | 56 | |
d984464e | 57 | |
e1226365 DB |
58 | struct SocketConnectData { |
59 | MigrationState *s; | |
60 | char *hostname; | |
61 | }; | |
62 | ||
63 | static void socket_connect_data_free(void *opaque) | |
64 | { | |
65 | struct SocketConnectData *data = opaque; | |
66 | if (!data) { | |
67 | return; | |
68 | } | |
69 | g_free(data->hostname); | |
70 | g_free(data); | |
71 | } | |
72 | ||
60e705c5 | 73 | static void socket_outgoing_migration(QIOTask *task, |
6f860ae7 | 74 | gpointer opaque) |
4951f65b | 75 | { |
e1226365 | 76 | struct SocketConnectData *data = opaque; |
60e705c5 DB |
77 | QIOChannel *sioc = QIO_CHANNEL(qio_task_get_source(task)); |
78 | Error *err = NULL; | |
4951f65b | 79 | |
60e705c5 | 80 | if (qio_task_propagate_error(task, &err)) { |
6f860ae7 | 81 | trace_migration_socket_outgoing_error(error_get_pretty(err)); |
e1226365 DB |
82 | data->s->to_dst_file = NULL; |
83 | migrate_fd_error(data->s, err); | |
60e705c5 | 84 | error_free(err); |
e08c95ce | 85 | } else { |
e1226365 | 86 | trace_migration_socket_outgoing_connected(data->hostname); |
22724f49 | 87 | migration_channel_connect(data->s, sioc, data->hostname); |
4951f65b | 88 | } |
60e705c5 | 89 | object_unref(OBJECT(sioc)); |
4951f65b CL |
90 | } |
91 | ||
6f860ae7 DB |
92 | static void socket_start_outgoing_migration(MigrationState *s, |
93 | SocketAddress *saddr, | |
94 | Error **errp) | |
4951f65b | 95 | { |
6f860ae7 | 96 | QIOChannelSocket *sioc = qio_channel_socket_new(); |
e1226365 | 97 | struct SocketConnectData *data = g_new0(struct SocketConnectData, 1); |
474c624d | 98 | |
e1226365 DB |
99 | data->s = s; |
100 | if (saddr->type == SOCKET_ADDRESS_KIND_INET) { | |
101 | data->hostname = g_strdup(saddr->u.inet.data->host); | |
102 | } | |
474c624d | 103 | |
6f01f136 | 104 | qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-outgoing"); |
d984464e DB |
105 | qio_channel_socket_connect_async(sioc, |
106 | saddr, | |
6f860ae7 | 107 | socket_outgoing_migration, |
e1226365 DB |
108 | data, |
109 | socket_connect_data_free); | |
d984464e | 110 | qapi_free_SocketAddress(saddr); |
4951f65b CL |
111 | } |
112 | ||
e65c67e4 DB |
113 | void tcp_start_outgoing_migration(MigrationState *s, |
114 | const char *host_port, | |
115 | Error **errp) | |
116 | { | |
9308ae54 DDAG |
117 | Error *err = NULL; |
118 | SocketAddress *saddr = tcp_build_address(host_port, &err); | |
119 | if (!err) { | |
120 | socket_start_outgoing_migration(s, saddr, &err); | |
121 | } | |
122 | error_propagate(errp, err); | |
e65c67e4 DB |
123 | } |
124 | ||
6f860ae7 DB |
125 | void unix_start_outgoing_migration(MigrationState *s, |
126 | const char *path, | |
127 | Error **errp) | |
128 | { | |
129 | SocketAddress *saddr = unix_build_address(path); | |
130 | socket_start_outgoing_migration(s, saddr, errp); | |
131 | } | |
132 | ||
d984464e | 133 | |
6f860ae7 DB |
134 | static gboolean socket_accept_incoming_migration(QIOChannel *ioc, |
135 | GIOCondition condition, | |
136 | gpointer opaque) | |
4951f65b | 137 | { |
d984464e DB |
138 | QIOChannelSocket *sioc; |
139 | Error *err = NULL; | |
4951f65b | 140 | |
d984464e DB |
141 | sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), |
142 | &err); | |
143 | if (!sioc) { | |
144 | error_report("could not accept migration connection (%s)", | |
145 | error_get_pretty(err)); | |
4951f65b CL |
146 | goto out; |
147 | } | |
148 | ||
6f860ae7 | 149 | trace_migration_socket_incoming_accepted(); |
d984464e | 150 | |
6f01f136 | 151 | qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-incoming"); |
22724f49 DB |
152 | migration_channel_process_incoming(migrate_get_current(), |
153 | QIO_CHANNEL(sioc)); | |
d984464e | 154 | object_unref(OBJECT(sioc)); |
ab52a824 | 155 | |
4951f65b | 156 | out: |
d984464e DB |
157 | /* Close listening socket as its no longer needed */ |
158 | qio_channel_close(ioc, NULL); | |
159 | return FALSE; /* unregister */ | |
4951f65b CL |
160 | } |
161 | ||
d984464e | 162 | |
6f860ae7 DB |
163 | static void socket_start_incoming_migration(SocketAddress *saddr, |
164 | Error **errp) | |
4951f65b | 165 | { |
6f860ae7 | 166 | QIOChannelSocket *listen_ioc = qio_channel_socket_new(); |
4951f65b | 167 | |
6f01f136 DB |
168 | qio_channel_set_name(QIO_CHANNEL(listen_ioc), |
169 | "migration-socket-listener"); | |
170 | ||
d984464e DB |
171 | if (qio_channel_socket_listen_sync(listen_ioc, saddr, errp) < 0) { |
172 | object_unref(OBJECT(listen_ioc)); | |
173 | qapi_free_SocketAddress(saddr); | |
43eaae28 | 174 | return; |
4951f65b CL |
175 | } |
176 | ||
d984464e DB |
177 | qio_channel_add_watch(QIO_CHANNEL(listen_ioc), |
178 | G_IO_IN, | |
6f860ae7 | 179 | socket_accept_incoming_migration, |
d984464e DB |
180 | listen_ioc, |
181 | (GDestroyNotify)object_unref); | |
d984464e | 182 | qapi_free_SocketAddress(saddr); |
4951f65b | 183 | } |
6f860ae7 | 184 | |
e65c67e4 DB |
185 | void tcp_start_incoming_migration(const char *host_port, Error **errp) |
186 | { | |
9308ae54 DDAG |
187 | Error *err = NULL; |
188 | SocketAddress *saddr = tcp_build_address(host_port, &err); | |
189 | if (!err) { | |
190 | socket_start_incoming_migration(saddr, &err); | |
191 | } | |
192 | error_propagate(errp, err); | |
e65c67e4 DB |
193 | } |
194 | ||
6f860ae7 DB |
195 | void unix_start_incoming_migration(const char *path, Error **errp) |
196 | { | |
197 | SocketAddress *saddr = unix_build_address(path); | |
198 | socket_start_incoming_migration(saddr, errp); | |
199 | } |