Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 255 insertions, 0 deletions

diff --git a/backends/cryptodev.c b/backends/cryptodev.c
new file mode 100644
index 000000000..bf5247616
--- /dev/null
+++ b/backends/cryptodev.c
@@ -0,0 +1,255 @@
+/*
+ * QEMU Crypto Device Implementation
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ * Authors:
+ *    Gonglei <arei.gonglei@huawei.com>
+ *
+ * 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 "sysemu/cryptodev.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+#include "qemu/config-file.h"
+#include "qom/object_interfaces.h"
+#include "hw/virtio/virtio-crypto.h"
+
+
+static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
+
+
+CryptoDevBackendClient *
+cryptodev_backend_new_client(const char *model,
+                                    const char *name)
+{
+    CryptoDevBackendClient *cc;
+
+    cc = g_malloc0(sizeof(CryptoDevBackendClient));
+    cc->model = g_strdup(model);
+    if (name) {
+        cc->name = g_strdup(name);
+    }
+
+    QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
+
+    return cc;
+}
+
+void cryptodev_backend_free_client(
+                  CryptoDevBackendClient *cc)
+{
+    QTAILQ_REMOVE(&crypto_clients, cc, next);
+    g_free(cc->name);
+    g_free(cc->model);
+    g_free(cc->info_str);
+    g_free(cc);
+}
+
+void cryptodev_backend_cleanup(
+             CryptoDevBackend *backend,
+             Error **errp)
+{
+    CryptoDevBackendClass *bc =
+                  CRYPTODEV_BACKEND_GET_CLASS(backend);
+
+    if (bc->cleanup) {
+        bc->cleanup(backend, errp);
+    }
+}
+
+int64_t cryptodev_backend_sym_create_session(
+           CryptoDevBackend *backend,
+           CryptoDevBackendSymSessionInfo *sess_info,
+           uint32_t queue_index, Error **errp)
+{
+    CryptoDevBackendClass *bc =
+                      CRYPTODEV_BACKEND_GET_CLASS(backend);
+
+    if (bc->create_session) {
+        return bc->create_session(backend, sess_info, queue_index, errp);
+    }
+
+    return -1;
+}
+
+int cryptodev_backend_sym_close_session(
+           CryptoDevBackend *backend,
+           uint64_t session_id,
+           uint32_t queue_index, Error **errp)
+{
+    CryptoDevBackendClass *bc =
+                      CRYPTODEV_BACKEND_GET_CLASS(backend);
+
+    if (bc->close_session) {
+        return bc->close_session(backend, session_id, queue_index, errp);
+    }
+
+    return -1;
+}
+
+static int cryptodev_backend_sym_operation(
+                 CryptoDevBackend *backend,
+                 CryptoDevBackendSymOpInfo *op_info,
+                 uint32_t queue_index, Error **errp)
+{
+    CryptoDevBackendClass *bc =
+                      CRYPTODEV_BACKEND_GET_CLASS(backend);
+
+    if (bc->do_sym_op) {
+        return bc->do_sym_op(backend, op_info, queue_index, errp);
+    }
+
+    return -VIRTIO_CRYPTO_ERR;
+}
+
+int cryptodev_backend_crypto_operation(
+                 CryptoDevBackend *backend,
+                 void *opaque,
+                 uint32_t queue_index, Error **errp)
+{
+    VirtIOCryptoReq *req = opaque;
+
+    if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
+        CryptoDevBackendSymOpInfo *op_info;
+        op_info = req->u.sym_op_info;
+
+        return cryptodev_backend_sym_operation(backend,
+                         op_info, queue_index, errp);
+    } else {
+        error_setg(errp, "Unsupported cryptodev alg type: %" PRIu32 "",
+                   req->flags);
+       return -VIRTIO_CRYPTO_NOTSUPP;
+    }
+
+    return -VIRTIO_CRYPTO_ERR;
+}
+
+static void
+cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
+                             void *opaque, Error **errp)
+{
+    CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
+    uint32_t value = backend->conf.peers.queues;
+
+    visit_type_uint32(v, name, &value, errp);
+}
+
+static void
+cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
+                             void *opaque, Error **errp)
+{
+    CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
+    uint32_t value;
+
+    if (!visit_type_uint32(v, name, &value, errp)) {
+        return;
+    }
+    if (!value) {
+        error_setg(errp, "Property '%s.%s' doesn't take value '%" PRIu32 "'",
+                   object_get_typename(obj), name, value);
+        return;
+    }
+    backend->conf.peers.queues = value;
+}
+
+static void
+cryptodev_backend_complete(UserCreatable *uc, Error **errp)
+{
+    CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
+    CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
+
+    if (bc->init) {
+        bc->init(backend, errp);
+    }
+}
+
+void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
+{
+    backend->is_used = used;
+}
+
+bool cryptodev_backend_is_used(CryptoDevBackend *backend)
+{
+    return backend->is_used;
+}
+
+void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
+{
+    backend->ready = ready;
+}
+
+bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
+{
+    return backend->ready;
+}
+
+static bool
+cryptodev_backend_can_be_deleted(UserCreatable *uc)
+{
+    return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
+}
+
+static void cryptodev_backend_instance_init(Object *obj)
+{
+    /* Initialize devices' queues property to 1 */
+    object_property_set_int(obj, "queues", 1, NULL);
+}
+
+static void cryptodev_backend_finalize(Object *obj)
+{
+    CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
+
+    cryptodev_backend_cleanup(backend, NULL);
+}
+
+static void
+cryptodev_backend_class_init(ObjectClass *oc, void *data)
+{
+    UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+
+    ucc->complete = cryptodev_backend_complete;
+    ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
+
+    QTAILQ_INIT(&crypto_clients);
+    object_class_property_add(oc, "queues", "uint32",
+                              cryptodev_backend_get_queues,
+                              cryptodev_backend_set_queues,
+                              NULL, NULL);
+}
+
+static const TypeInfo cryptodev_backend_info = {
+    .name = TYPE_CRYPTODEV_BACKEND,
+    .parent = TYPE_OBJECT,
+    .instance_size = sizeof(CryptoDevBackend),
+    .instance_init = cryptodev_backend_instance_init,
+    .instance_finalize = cryptodev_backend_finalize,
+    .class_size = sizeof(CryptoDevBackendClass),
+    .class_init = cryptodev_backend_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_USER_CREATABLE },
+        { }
+    }
+};
+
+static void
+cryptodev_backend_register_types(void)
+{
+    type_register_static(&cryptodev_backend_info);
+}
+
+type_init(cryptodev_backend_register_types);