hw/arm/virt-acpi-build: don't save VirtGuestInfo on AcpiBuildState
[qemu.git] / migration / tls.c
1 /*
2 * QEMU migration TLS support
3 *
4 * Copyright (c) 2015 Red Hat, Inc.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 *
19 */
20
21 #include "qemu/osdep.h"
22 #include "migration/migration.h"
23 #include "io/channel-tls.h"
24 #include "crypto/tlscreds.h"
25 #include "qemu/error-report.h"
26 #include "qapi/error.h"
27 #include "trace.h"
28
29 static QCryptoTLSCreds *
30 migration_tls_get_creds(MigrationState *s,
31 QCryptoTLSCredsEndpoint endpoint,
32 Error **errp)
33 {
34 Object *creds;
35 QCryptoTLSCreds *ret;
36
37 creds = object_resolve_path_component(
38 object_get_objects_root(), s->parameters.tls_creds);
39 if (!creds) {
40 error_setg(errp, "No TLS credentials with id '%s'",
41 s->parameters.tls_creds);
42 return NULL;
43 }
44 ret = (QCryptoTLSCreds *)object_dynamic_cast(
45 creds, TYPE_QCRYPTO_TLS_CREDS);
46 if (!ret) {
47 error_setg(errp, "Object with id '%s' is not TLS credentials",
48 s->parameters.tls_creds);
49 return NULL;
50 }
51 if (ret->endpoint != endpoint) {
52 error_setg(errp,
53 "Expected TLS credentials for a %s endpoint",
54 endpoint == QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT ?
55 "client" : "server");
56 return NULL;
57 }
58
59 object_ref(OBJECT(ret));
60 return ret;
61 }
62
63
64 static void migration_tls_incoming_handshake(Object *src,
65 Error *err,
66 gpointer opaque)
67 {
68 QIOChannel *ioc = QIO_CHANNEL(src);
69
70 if (err) {
71 trace_migration_tls_incoming_handshake_error(error_get_pretty(err));
72 error_report("%s", error_get_pretty(err));
73 } else {
74 trace_migration_tls_incoming_handshake_complete();
75 migration_channel_process_incoming(migrate_get_current(), ioc);
76 }
77 object_unref(OBJECT(ioc));
78 }
79
80 void migration_tls_channel_process_incoming(MigrationState *s,
81 QIOChannel *ioc,
82 Error **errp)
83 {
84 QCryptoTLSCreds *creds;
85 QIOChannelTLS *tioc;
86
87 creds = migration_tls_get_creds(
88 s, QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, errp);
89 if (!creds) {
90 return;
91 }
92
93 tioc = qio_channel_tls_new_server(
94 ioc, creds,
95 NULL, /* XXX pass ACL name */
96 errp);
97 if (!tioc) {
98 return;
99 }
100
101 trace_migration_tls_incoming_handshake_start();
102 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-incoming");
103 qio_channel_tls_handshake(tioc,
104 migration_tls_incoming_handshake,
105 NULL,
106 NULL);
107 }
108
109
110 static void migration_tls_outgoing_handshake(Object *src,
111 Error *err,
112 gpointer opaque)
113 {
114 MigrationState *s = opaque;
115 QIOChannel *ioc = QIO_CHANNEL(src);
116
117 if (err) {
118 trace_migration_tls_outgoing_handshake_error(error_get_pretty(err));
119 s->to_dst_file = NULL;
120 migrate_fd_error(s, err);
121 } else {
122 trace_migration_tls_outgoing_handshake_complete();
123 migration_channel_connect(s, ioc, NULL);
124 }
125 object_unref(OBJECT(ioc));
126 }
127
128
129 void migration_tls_channel_connect(MigrationState *s,
130 QIOChannel *ioc,
131 const char *hostname,
132 Error **errp)
133 {
134 QCryptoTLSCreds *creds;
135 QIOChannelTLS *tioc;
136
137 creds = migration_tls_get_creds(
138 s, QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, errp);
139 if (!creds) {
140 return;
141 }
142
143 if (s->parameters.tls_hostname) {
144 hostname = s->parameters.tls_hostname;
145 }
146 if (!hostname) {
147 error_setg(errp, "No hostname available for TLS");
148 return;
149 }
150
151 tioc = qio_channel_tls_new_client(
152 ioc, creds, hostname, errp);
153 if (!tioc) {
154 return;
155 }
156
157 trace_migration_tls_outgoing_handshake_start(hostname);
158 qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-outgoing");
159 qio_channel_tls_handshake(tioc,
160 migration_tls_outgoing_handshake,
161 s,
162 NULL);
163 }