Merge tag 'linux-user-for-7.1-pull-request' of https://gitlab.com/laurent_vivier...
[qemu.git] / migration / channel.c
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-channel.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 (s->parameters.tls_creds &&
42 *s->parameters.tls_creds &&
43 !object_dynamic_cast(OBJECT(ioc),
44 TYPE_QIO_CHANNEL_TLS)) {
45 migration_tls_channel_process_incoming(s, ioc, &local_err);
46 } else {
47 migration_ioc_register_yank(ioc);
48 migration_ioc_process_incoming(ioc, &local_err);
49 }
50
51 if (local_err) {
52 error_report_err(local_err);
53 }
54 }
55
56
57 /**
58 * @migration_channel_connect - Create new outgoing migration channel
59 *
60 * @s: Current migration state
61 * @ioc: Channel to which we are connecting
62 * @hostname: Where we want to connect
63 * @error: Error indicating failure to connect, free'd here
64 */
65 void migration_channel_connect(MigrationState *s,
66 QIOChannel *ioc,
67 const char *hostname,
68 Error *error)
69 {
70 trace_migration_set_outgoing_channel(
71 ioc, object_get_typename(OBJECT(ioc)), hostname, error);
72
73 if (!error) {
74 if (s->parameters.tls_creds &&
75 *s->parameters.tls_creds &&
76 !object_dynamic_cast(OBJECT(ioc),
77 TYPE_QIO_CHANNEL_TLS)) {
78 migration_tls_channel_connect(s, ioc, hostname, &error);
79
80 if (!error) {
81 /* tls_channel_connect will call back to this
82 * function after the TLS handshake,
83 * so we mustn't call migrate_fd_connect until then
84 */
85
86 return;
87 }
88 } else {
89 QEMUFile *f = qemu_fopen_channel_output(ioc);
90
91 migration_ioc_register_yank(ioc);
92
93 qemu_mutex_lock(&s->qemu_file_lock);
94 s->to_dst_file = f;
95 qemu_mutex_unlock(&s->qemu_file_lock);
96 }
97 }
98 migrate_fd_connect(s, error);
99 g_free(s->hostname);
100 error_free(error);
101 }