Import QEMU upstream snapshot d2e570c

Upstream: https://gitlab.com/qemu-project/qemu.git

Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475

migration/tls.c

@@ -0,0 +1,169 @@
+/*
+ * QEMU migration TLS support
+ *
+ * Copyright (c) 2015 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "channel.h"
+#include "migration.h"
+#include "tls.h"
+#include "options.h"
+#include "crypto/tlscreds.h"
+#include "qemu/error-report.h"
+#include "qapi/error.h"
+#include "trace.h"
+
+static QCryptoTLSCreds *
+migration_tls_get_creds(QCryptoTLSCredsEndpoint endpoint, Error **errp)
+{
+    Object *creds;
+    const char *tls_creds = migrate_tls_creds();
+    QCryptoTLSCreds *ret;
+
+    creds = object_resolve_path_component(object_get_objects_root(), tls_creds);
+    if (!creds) {
+        error_setg(errp, "No TLS credentials with id '%s'", tls_creds);
+        return NULL;
+    }
+    ret = (QCryptoTLSCreds *)object_dynamic_cast(
+        creds, TYPE_QCRYPTO_TLS_CREDS);
+    if (!ret) {
+        error_setg(errp, "Object with id '%s' is not TLS credentials",
+                   tls_creds);
+        return NULL;
+    }
+    if (!qcrypto_tls_creds_check_endpoint(ret, endpoint, errp)) {
+        return NULL;
+    }
+
+    return ret;
+}
+
+
+static void migration_tls_incoming_handshake(QIOTask *task,
+                                             gpointer opaque)
+{
+    QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task));
+    Error *err = NULL;
+
+    if (qio_task_propagate_error(task, &err)) {
+        trace_migration_tls_incoming_handshake_error(error_get_pretty(err));
+        error_report_err(err);
+    } else {
+        trace_migration_tls_incoming_handshake_complete();
+        migration_channel_process_incoming(ioc);
+    }
+    object_unref(OBJECT(ioc));
+}
+
+void migration_tls_channel_process_incoming(QIOChannel *ioc, Error **errp)
+{
+    QCryptoTLSCreds *creds;
+    QIOChannelTLS *tioc;
+
+    creds = migration_tls_get_creds(QCRYPTO_TLS_CREDS_ENDPOINT_SERVER, errp);
+    if (!creds) {
+        return;
+    }
+
+    tioc = qio_channel_tls_new_server(ioc, creds, migrate_tls_authz(), errp);
+    if (!tioc) {
+        return;
+    }
+
+    trace_migration_tls_incoming_handshake_start();
+    qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-incoming");
+    if (migrate_postcopy_ram() || migrate_return_path()) {
+        qio_channel_set_feature(QIO_CHANNEL(tioc),
+                                QIO_CHANNEL_FEATURE_CONCURRENT_IO);
+    }
+    qio_channel_tls_handshake(tioc,
+                              migration_tls_incoming_handshake,
+                              NULL,
+                              NULL,
+                              NULL);
+}
+
+
+static void migration_tls_outgoing_handshake(QIOTask *task,
+                                             gpointer opaque)
+{
+    MigrationState *s = opaque;
+    g_autoptr(QIOChannel) ioc = QIO_CHANNEL(qio_task_get_source(task));
+    Error *err = NULL;
+
+    if (qio_task_propagate_error(task, &err)) {
+        trace_migration_tls_outgoing_handshake_error(error_get_pretty(err));
+        migration_connect_error_propagate(s, err);
+        return;
+    }
+
+    trace_migration_tls_outgoing_handshake_complete();
+    migration_channel_connect_outgoing(s, ioc);
+}
+
+QIOChannelTLS *migration_tls_client_create(QIOChannel *ioc,
+                                           Error **errp)
+{
+    QCryptoTLSCreds *creds;
+
+    creds = migration_tls_get_creds(QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT, errp);
+    if (!creds) {
+        return NULL;
+    }
+
+    return qio_channel_tls_new_client(ioc, creds, migrate_tls_hostname(), errp);
+}
+
+void migration_tls_channel_connect(MigrationState *s, QIOChannel *ioc,
+                                   Error **errp)
+{
+    QIOChannelTLS *tioc;
+
+    tioc = migration_tls_client_create(ioc, errp);
+    if (!tioc) {
+        return;
+    }
+
+    trace_migration_tls_outgoing_handshake_start();
+    qio_channel_set_name(QIO_CHANNEL(tioc), "migration-tls-outgoing");
+
+    if (migrate_postcopy_ram() || migrate_return_path()) {
+        qio_channel_set_feature(QIO_CHANNEL(tioc),
+                                QIO_CHANNEL_FEATURE_CONCURRENT_IO);
+    }
+    qio_channel_tls_handshake(tioc,
+                              migration_tls_outgoing_handshake,
+                              s,
+                              NULL,
+                              NULL);
+}
+
+void migration_tls_channel_end(QIOChannel *ioc, Error **errp)
+{
+    qio_channel_tls_bye(QIO_CHANNEL_TLS(ioc), errp);
+}
+
+bool migrate_channel_requires_tls_upgrade(QIOChannel *ioc)
+{
+    if (!migrate_tls()) {
+        return false;
+    }
+
+    return !object_dynamic_cast(OBJECT(ioc), TYPE_QIO_CHANNEL_TLS);
+}