1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/*
* QEMU live migration via socket
*
* Copyright Red Hat, Inc. 2009-2016
*
* Authors:
* Chris Lalancette <clalance@redhat.com>
* Daniel P. Berrange <berrange@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "migration/migration.h"
#include "migration/qemu-file.h"
#include "io/channel-socket.h"
#include "trace.h"
static SocketAddress *tcp_build_address(const char *host_port, Error **errp)
{
InetSocketAddress *iaddr = inet_parse(host_port, errp);
SocketAddress *saddr;
if (!iaddr) {
return NULL;
}
saddr = g_new0(SocketAddress, 1);
saddr->type = SOCKET_ADDRESS_KIND_INET;
saddr->u.inet.data = iaddr;
return saddr;
}
static SocketAddress *unix_build_address(const char *path)
{
SocketAddress *saddr;
saddr = g_new0(SocketAddress, 1);
saddr->type = SOCKET_ADDRESS_KIND_UNIX;
saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
saddr->u.q_unix.data->path = g_strdup(path);
return saddr;
}
struct SocketConnectData {
MigrationState *s;
char *hostname;
};
static void socket_connect_data_free(void *opaque)
{
struct SocketConnectData *data = opaque;
if (!data) {
return;
}
g_free(data->hostname);
g_free(data);
}
static void socket_outgoing_migration(QIOTask *task,
gpointer opaque)
{
struct SocketConnectData *data = opaque;
QIOChannel *sioc = QIO_CHANNEL(qio_task_get_source(task));
Error *err = NULL;
if (qio_task_propagate_error(task, &err)) {
trace_migration_socket_outgoing_error(error_get_pretty(err));
data->s->to_dst_file = NULL;
migrate_fd_error(data->s, err);
error_free(err);
} else {
trace_migration_socket_outgoing_connected(data->hostname);
migration_channel_connect(data->s, sioc, data->hostname);
}
object_unref(OBJECT(sioc));
}
static void socket_start_outgoing_migration(MigrationState *s,
SocketAddress *saddr,
Error **errp)
{
QIOChannelSocket *sioc = qio_channel_socket_new();
struct SocketConnectData *data = g_new0(struct SocketConnectData, 1);
data->s = s;
if (saddr->type == SOCKET_ADDRESS_KIND_INET) {
data->hostname = g_strdup(saddr->u.inet.data->host);
}
qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-outgoing");
qio_channel_socket_connect_async(sioc,
saddr,
socket_outgoing_migration,
data,
socket_connect_data_free);
qapi_free_SocketAddress(saddr);
}
void tcp_start_outgoing_migration(MigrationState *s,
const char *host_port,
Error **errp)
{
Error *err = NULL;
SocketAddress *saddr = tcp_build_address(host_port, &err);
if (!err) {
socket_start_outgoing_migration(s, saddr, &err);
}
error_propagate(errp, err);
}
void unix_start_outgoing_migration(MigrationState *s,
const char *path,
Error **errp)
{
SocketAddress *saddr = unix_build_address(path);
socket_start_outgoing_migration(s, saddr, errp);
}
static gboolean socket_accept_incoming_migration(QIOChannel *ioc,
GIOCondition condition,
gpointer opaque)
{
QIOChannelSocket *sioc;
Error *err = NULL;
sioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc),
&err);
if (!sioc) {
error_report("could not accept migration connection (%s)",
error_get_pretty(err));
goto out;
}
trace_migration_socket_incoming_accepted();
qio_channel_set_name(QIO_CHANNEL(sioc), "migration-socket-incoming");
migration_channel_process_incoming(migrate_get_current(),
QIO_CHANNEL(sioc));
object_unref(OBJECT(sioc));
out:
/* Close listening socket as its no longer needed */
qio_channel_close(ioc, NULL);
return FALSE; /* unregister */
}
static void socket_start_incoming_migration(SocketAddress *saddr,
Error **errp)
{
QIOChannelSocket *listen_ioc = qio_channel_socket_new();
qio_channel_set_name(QIO_CHANNEL(listen_ioc),
"migration-socket-listener");
if (qio_channel_socket_listen_sync(listen_ioc, saddr, errp) < 0) {
object_unref(OBJECT(listen_ioc));
qapi_free_SocketAddress(saddr);
return;
}
qio_channel_add_watch(QIO_CHANNEL(listen_ioc),
G_IO_IN,
socket_accept_incoming_migration,
listen_ioc,
(GDestroyNotify)object_unref);
qapi_free_SocketAddress(saddr);
}
void tcp_start_incoming_migration(const char *host_port, Error **errp)
{
Error *err = NULL;
SocketAddress *saddr = tcp_build_address(host_port, &err);
if (!err) {
socket_start_incoming_migration(saddr, &err);
}
error_propagate(errp, err);
}
void unix_start_incoming_migration(const char *path, Error **errp)
{
SocketAddress *saddr = unix_build_address(path);
socket_start_incoming_migration(saddr, errp);
}
|
